Solid-State Batteries and Battery Technology Frontiers in the NEV Industry

Category: EV Battery & Carbon Depth: Medium Date: April 12, 2026 Sources: 3 research reports (content_library), 27 evidence items, 6 observations

I. Executive Summary

Solid-state batteries are widely recognized as the next-generation energy storage technology, promising significant improvements in energy density and intrinsic safety over conventional lithium-ion batteries. This report synthesizes findings from three securities research reports covering technology evolution, commercialization progress, cost dynamics, and market outlook.

Key findings:

• Technology convergence on sulfide electrolytes: While current production is dominated by oxide and polymer semi-solid batteries (97%+ of 2024 shipments in China), the sulfide route is converging as the consensus path for all-solid-state batteries, expected to reach 40%+ market share by 2035 and 65% within all-solid-state batteries by 2030.[^1][^2]

• 2026-2027 as the critical inflection point: 2026 is the pilot validation year with major Chinese OEMs (GAC, BYD, FAW Hongqi, Geely, Changan, Chery) launching solid-state battery test vehicles. 2027 is the mass production target for SolidPower, Toyota, Samsung, GAC, and QingTao Energy.[^3][^4]

• Cost remains the primary barrier: At approximately 1.49 yuan/Wh in 2022, solid-state batteries cost roughly 5x more than conventional lithium-ion. Lithium sulfide (Li2S), accounting for 80%+ of sulfide electrolyte cost, is the key bottleneck. However, Li2S prices have dropped over 60% in 18 months, and production capacity is scaling from tons to hundreds of tons.[^5][^6]

• China leads industrialization: China holds over 80% of global solid-state battery production capacity in 2025, backed by comprehensive policy support including new national standards (effective July 2026) and inclusion in the 15th Five-Year Plan.[^7][^8]

• Application diversification accelerates: Beyond electric vehicles, solid-state batteries are being validated in eVTOL aircraft, humanoid robots (projected 74GWh demand by 2035), commercial aerospace, and high-end energy storage.[^9]

• Equipment market opportunity: The solid-state battery equipment market is projected to grow from 4 billion yuan in 2024 to over 1,000 billion yuan by 2030, with per-GWh equipment investment 3-5x that of traditional liquid battery lines.[^10]

II. Technology Landscape: From Liquid to Solid

2.1 Core Technological Shift

The fundamental difference between solid-state and conventional lithium-ion batteries lies in the electrolyte system. Traditional lithium-ion batteries use liquid electrolyte (lithium hexafluorophosphate dissolved in organic solvents) for lithium-ion transport and a separator to prevent direct contact between the positive and negative electrodes. Solid-state batteries replace both components with a solid electrolyte (such as sulfide compounds) that simultaneously conducts ions and physically isolates the electrodes, eliminating the need for a separate separator.[^1]

This structural change delivers two primary advantages: significantly higher energy density (enabling the use of high-capacity anodes such as silicon or lithium metal) and intrinsic safety (elimination of flammable liquid electrolyte reduces thermal runaway risk).[^1][^11]

2.2 Classification and Technology Routes

Solid-state batteries can be classified along three dimensions:

By electrolyte content: Liquid (>25wt% electrolyte), semi-solid (<10wt%), quasi-solid, and all-solid (no liquid electrolyte). China's upcoming national standard (expected July 2026) defines all-solid-state batteries as those with a weight loss rate of no more than 0.5% under vacuum drying conditions — the first quantitative national-level definition.[^12]

By electrolyte type: Four main routes exist:

• Oxide (e.g., LLZO, LLTO, LATP): High chemical stability and mature preparation工艺, but lower ionic conductivity and poor interface contact make scaling cell capacity difficult.[^2]

• Sulfide: Highest ionic conductivity (comparable to or exceeding liquid electrolytes), mechanically soft enough to maintain good solid-solid interface contact, but air-sensitive and currently expensive.[^1][^2]

• Polymer: Lowest cost and mature processing (compatible with existing lithium-ion assembly lines), but limited ionic conductivity and poor fast-charging capability.[^2]

• Halide: Emerging route with good stability; still at early R&D stage.[^1]

By structure: Thin-film type, 3D type, and bulk (body) type. Bulk sulfide all-solid-state batteries are considered the long-term trend for automotive applications.[^1]

2.3 Current State and Three-Generation Roadmap

As of 2024, China's solid-state battery shipments are overwhelmingly dominated by oxide and polymer semi-solid technologies (97%+), with sulfide and halide routes accounting for less than 3%.[^13] However, the technology roadmap is converging on sulfide for all-solid-state applications.

Academician Ouyang Minggao outlined a three-generation roadmap at the 2026 China EV百人会 Forum:[^4]

EVTank forecasts that sulfide electrolytes will reach approximately 30% of total electrolyte shipments by 2030, and 65% market share within all-solid-state batteries specifically.[^2]

III. Industry Status and Commercialization Timeline

3.1 2026: The Pilot Validation Year

2026 marks the critical window for all-solid-state battery vehicle validation. Multiple Chinese OEMs have announced solid-state battery test vehicle launches:[^4]

• FAW Hongqi: First self-developed all-solid-state battery pack successfully loaded on Hongqi Tiangong 06 vehicle — transitioned from lab validation to real-vehicle testing.

• GAC Group: All-solid-state battery pilot line completed and operational in Panyu, Guangzhou, capable of 60Ah+ automotive-grade cells. Small-batch vehicle validation starting in 2026.[^14]

• Geely: First self-developed all-solid-state battery pack completion and vehicle validation in 2026, small-batch production in 2027.[^4]

• Changan: "Golden Bell" solid-state battery to be validated on robots in Q3 2026, small-scale demonstration operation in 2027.[^4]

• BYD: Bulk demonstration of all-solid-state battery vehicles planned for around 2027, mass adoption post-2030.[^15]

• Chery: Targeted operational deployment in 2026, validation and batch launch in 2027.[^4]

In Q1 2026 alone, over 16 solid-state battery and materials projects in China were commissioned, started construction, or signed — with oxide electrolyte routes leading in current commercialization pace.[^4]

3.2 2027: Global Mass Production Inflection

2027 emerges as the consensus milestone for initial mass production across major global players:[^3][^15]

3.3 China's Dominant Position

China's leadership in solid-state battery industrialization is underpinned by three factors:[^7]

1. Capacity dominance: China accounts for over 80% of global solid-state battery production capacity in 2025. Leading companies include WeLion New Energy (128.2 GWh planned), QingTao Energy (65 GWh), and Ganfeng Lithium (40 GWh).[3]

2. Policy framework: Solid-state batteries are integrated into the national NEV industry strategy. The Ministry of Industry and Information Technology (MIIT) published mandatory standard GB38031-2025 (effective July 2026) requiring "no fire, no explosion" for EV batteries — a requirement nearly impossible for liquid batteries to meet without sacrificing energy density, effectively mandating transition to solid-state technology.[^8]

3. Supply chain completeness: From Li2S precursor production to cell manufacturing and equipment supply, China maintains the world's most complete solid-state battery industrial chain.[^7]

3.4 Current Commercial Deployments

Semi-solid batteries are already in commercial service:

• WeLion New Energy: 360 Wh/kg semi-solid battery installations exceeded 1.2 GWh in H1 2025.[^13] Delivered 150 kWh semi-solid battery pack to NIO ET7, achieving 1,044 km real-world range.[^16]

• SAIC / QingTao: IM L6 vehicle equipped with 368 Wh/kg oxide-route semi-solid battery.[^17]

• Ganfeng Lithium: First batch of vehicles with Ganfeng solid-state batteries launched for demonstration operation in January 2021.[^16]

IV. Cost Structure and Materials Challenge

4.1 Cost Trajectory

Solid-state battery costs are projected to decline significantly but remain substantially above conventional lithium-ion in the near term:[^5]

Current all-solid-state battery material costs are approximately 5x those of conventional lithium-ion batteries.[^3] Cost reduction hinges primarily on electrolyte and precursor material scale-up.

4.2 Lithium Sulfide: The Critical Bottleneck

Lithium sulfide (Li2S) is the dominant cost driver for sulfide solid-state batteries, accounting for over 80% of sulfide electrolyte production cost.[^6] Key dynamics:

• Price trajectory: Fell over 60% from early 2024 to approximately 1,950 yuan/kg by September 2025. Industry analysis suggests 200 yuan/kg is the critical threshold for sulfide all-solid-state commercialization.[^6]

• Capacity expansion: Global monthly Li2S production rose from 1.32 tons in January 2024 to approximately 5 tons by November 2025 — a threefold increase.[^6]

• Demand forecast: Global Li2S demand expected to exceed 1,000 tons by 2027 and approach 10,000 tons by 2030.[^4]

• Market size: Ultra-pure (3N+) Li2S market was approximately 0.36 billion yuan in 2024, projected to reach 2.68 billion yuan by 2031 (CAGR 33.0%).[^6]

Five main Li2S production routes exist, with hydrogen sulfide neutralization emerging as the most promising for large-scale production due to high purity and cost advantages.[^6]

4.3 Other Electrolyte Cost Dynamics

LLZO (oxide electrolyte) prices were approximately 1.2 million yuan/ton in 2024, projected to fall to roughly 100,000 yuan/ton by 2035.[^5] In sulfide all-solid-state batteries, solid electrolyte accounts for 50%+ of total material cost, compared to 20% in oxide semi-solid batteries.[^5]

4.4 Anode Evolution

The anode technology path for solid-state batteries follows a clear progression:[^18]

• Short-term (Gen 1-2): Silicon-based anodes. Silicon-oxygen (SiOx) anodes currently dominate (70%+ of silicon-based anode shipments in 2024). CVD-based vapor-phase silicon-carbon anodes (currently ~20% share) are projected to exceed 75% by 2030 as the工艺 matures.[^4] Global silicon-based anode shipments are forecast to reach 600,000 tons by 2030 (CAGR 57% from 2025).[^4]

• Long-term (Gen 3): Lithium metal anodes. Offering the highest room-temperature capacity and lowest electrochemical potential, lithium metal is the ideal anode material for ultimate energy density. Companies including Ganfeng Lithium, Sunwoda, and CATL are actively developing lithium metal and anode-free technologies.[^18]

4.5 Supporting Material Upgrades

• Cathode: Upgrading to ultra-high nickel (8-series, 9-series), lithium-rich manganese-based (250+ mAh/g at 2.0-4.8V), and high-voltage spinel nickel-manganese-oxide materials.[^4]

• Conductive agents: Single-walled carbon nanotubes (SWCNT) are better suited for solid-state batteries than multi-walled alternatives, particularly with silicon anodes that suffer from poor conductivity and volume expansion.[^4]

• Current collectors: Composite copper foil with a "metal-polymer-metal" sandwich structure offers cost reduction, improved safety, weight reduction, and higher energy density — better matching solid-state battery requirements.[^4][^18]

V. Manufacturing Equipment and Process Revolution

5.1 Process Reengineering

Solid-state battery manufacturing fundamentally restructures the conventional lithium-ion production process across three stages:[^10]

• Front-end (electrode and electrolyte preparation): Dry electrode technology replaces wet coating, eliminating solvent-based涂布 machines, drying ovens, and NMP recovery systems. New equipment includes mixers, fiberization equipment, and precision rolling presses.[^14]

• Mid-end (cell assembly): Solid-state batteries exclusively use stacking (not winding). New equipment includes adhesive frame printing equipment and isostatic pressing equipment. The electrolyte filling process is eliminated.[^10]

• Back-end (formation and grading): Transition from low-pressure to high-pressure formation and grading equipment, with individual cell pressure requirements exceeding 10 MPa.[^10]

5.2 Equipment Market Opportunity

The equipment investment scale is substantial:[^10]

• Per-GWh equipment investment for all-solid-state batteries is 3-5x that of traditional liquid battery lines.[^4]

• Global solid-state battery equipment market: approximately 4 billion yuan in 2024 (with all-solid-state equipment under 5%), projected to exceed 1,000 billion yuan by 2030 (CAGR 70%+).[^10]

• All-solid-state equipment market specifically: projected to reach 45.5 billion yuan by 2030 (CAGR 150%+).[^4]

5.3 Key Equipment Categories

• Isostatic pressing: Applies uniform high pressure (typically 100+ MPa) from all directions for 3D densification, breaking through the physical limits of uniaxial pressing. Warm isostatic pressing is the most suitable工艺 path for solid-state batteries.[^10]

• Stacking equipment: China's domestic lithium-ion stacking equipment market reached 3.6 billion yuan in 2024, expected to grow to 9.8 billion yuan by 2027 (CAGR ~40%).[^10]

• Dry-process fiberization: The core technology for dry electrode coating, critical for processing solvent-sensitive components like sulfide electrolytes and lithium metal.[^10]

• High-pressure formation: Requires individual cell pressure of 10+ MPa, with demanding structural safety and uniformity requirements.[^10]

VI. Application Diversification and Market Outlook

6.1 Beyond Electric Vehicles

While NEVs remain the largest addressable market, solid-state batteries are finding rapid adoption in high-value, performance-critical applications:[^9]

• eVTOL (Electric Vertical Takeoff and Landing): EHang completed the world's first eVTOL solid-state battery flight test in November 2024, with flight endurance improved by 60-90%. Solid-state batteries' high energy density and safety make them ideal for urban air mobility.[^9]

• Humanoid robots: XPeng announced its IRON humanoid robot will debut with all-solid-state batteries in late 2025. Samsung SDI released a pouch-type all-solid-state battery sample for humanoid robots in March 2026, targeting H2 2027 mass production. TrendForce estimates humanoid robot solid-state battery demand will exceed 74 GWh by 2035 — over 1,000x growth from 2026 levels.[^9]

• Commercial aerospace:星河动力航天 (Galactic Energy) completed the first in-orbit validation of a commercial satellite powered by solid-state batteries in February 2026, with 72 hours of stable operation. The space environment demands high energy density, radiation resistance, and wide operating temperature range — all strengths of solid-state technology.[^9]

• High-end energy storage: Semi-solid batteries are entering data center, commercial, and industrial energy storage scenarios where safety is paramount. However, grid-side大规模 adoption awaits cost and cycle life improvements. Penetration in energy storage is projected at only ~2% by 2030.[^13]

6.2 Market Growth Projections

• Global solid-state battery shipments: Projected to reach 614 GWh by 2030, with all-solid-state accounting for approximately 30%.[^3]

• Regional growth rates: Asia-Pacific, North America, and Europe are all expected to maintain 20%+ CAGR for solid-state battery markets from 2025-2030.[^7]

• China's battery demand: BOCI forecasts China's power battery installations to reach 780 GWh in 2025 and 1,000 GWh in 2026 (+28% YoY), driven by NEV sales growth and increasing battery capacity per vehicle (from 44.1 kWh in Oct 2024 to 55 kWh in Oct 2025, a 25% increase).[^14]

• Global NEV sales: Forecast at approximately 26 million units in 2026 (+15% YoY).[^14]

6.3 Policy and Regulatory Drivers

• China: GB38031-2025 mandatory safety standard (effective July 2026) requires "no fire, no explosion" for EV batteries. The first national solid-state battery standard is expected July 2026, defining quantitative classification criteria. Solid-state batteries are included in the 15th Five-Year Plan for intelligent connected NEVs.[^8][^12]

• Japan: Joint research institute established with Toyota, Honda, and Panasonic, with massive R&D subsidies to reclaim leadership in battery technology.[^7]

• Europe: European Battery Alliance and Green Deal provide special funds for domestic battery capacity, with strict carbon emission regulations driving supply chain regionalization.[^7]

• United States: Inflation Reduction Act provides tax incentives and subsidies for domestically manufactured EVs and batteries, building a local supply chain from raw materials to production.[^7]

VII. Key Findings and Risk Assessment

7.1 Summary

1. Sulfide route is the technology consensus: Despite current production being dominated by semi-solid oxide/polymer batteries, all major indicators point to sulfide as the dominant all-solid-state electrolyte technology, converging through industry R&D focus and performance advantages.

2. Commercialization is entering the validation phase: 2026 pilot testing and 2027 initial mass production represent a clear, credible timeline backed by specific company commitments and pilot line completion data.

3. Cost reduction is the primary challenge: Li2S cost trajectory will determine the pace of all-solid-state commercialization. The 200 yuan/kg threshold for Li2S remains approximately 10x above current prices.

4. China leads the industrialization race: Overwhelming capacity share, policy support, and supply chain completeness position China to capture the majority of solid-state battery value creation in the 2025-2030 period.

5. Equipment and materials represent the earliest value capture: Equipment providers and specialty material suppliers will benefit before cell manufacturers achieve volume production, given the 3-5x equipment investment multiplier and entirely new material requirements.

7.2 Risk Assessment

• Technology risk: All-solid-state battery technology remains immature. Unresolved scientific challenges (interface stability, lithium dendrite formation, cycle life) could delay timelines.

• Cost risk: If Li2S and other core material cost reduction paths are blocked, solid-state batteries will remain economically uncompetitive with improving liquid lithium-ion technology.

• Demand risk: High costs may slow market acceptance, particularly in cost-sensitive applications like energy storage, delaying the scale needed for cost reductions.

• Technology route risk: The dominant technology path has not been definitively determined. Companies betting on a single route face directional risk if the industry converges elsewhere.

7.3 Data Coverage Assessment

⚠️ Limited data coverage: This report is based on 3 research reports from Chinese securities firms. All evidence is sourced from content_library documents. No structured excel_assets data was found in the EV Battery & Carbon category.

📭 Data gaps:

• No granular pricing data for silicon-based anodes, composite copper foil, and SWCNT conductive agents

• Limited data on Western solid-state battery companies' specific capacity plans beyond public announcements

• Cost projections to 2035 are model-based estimates that may not reflect actual trajectory

• 🕐 Some data points (e.g., 2022 cost figures) may not reflect current market conditions

Sources

[^1]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 55dd7781d104977c8a935ed3f8e9348cabf7e53df22796d2c582f9d575f4a445 | Chunk: 0 [^2]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 676aa758bb7ce1978c2b7dd83a5e8d0fddc3390d092df659831f87289e49950f | Chunk: 5 [^3]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 48801b73562f0c49a42ce312a89098c89dc29fc4242a85f4e1a791ec8e669271 | Chunk: 2 [^4]: nev_solid_state_battery_dgzq | File: nev_solid_state_battery_dgzq.pdf | Index: content_library | Doc ID: e4349abf1bd6453d8b3c1dfd4f43f59ac587ade155c654b45c5b4c0ba2a64711 | Chunk: 2 [^5]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 5b946310faa66140a4be664c8fc0708606a8bafa0eaef20d99af89a1af885cfb | Chunk: 3 [^6]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 676aa758bb7ce1978c2b7dd83a5e8d0fddc3390d092df659831f87289e49950f | Chunk: 5 [^7]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 48801b73562f0c49a42ce312a89098c89dc29fc4242a85f4e1a791ec8e669271 | Chunk: 2 [^8]: nev_solid_state_battery_dgzq | File: nev_solid_state_battery_dgzq.pdf | Index: content_library | Doc ID: 170d9549e547411af4ac6cdd52071f510dfdefe02b1a5e8febdc7b1fbbb19946 | Chunk: 0 [^9]: nev_solid_state_battery_dgzq | File: nev_solid_state_battery_dgzq.pdf | Index: content_library | Doc ID: 75b24bdbe20de412e82f661df631b8e09c5ea2d27b60f5cc6c5b844bdd2f8765 | Chunk: 1 [^10]: nev_solid_state_battery_dgzq | File: nev_solid_state_battery_dgzq.pdf | Index: content_library | Doc ID: e4349abf1bd6453d8b3c1dfd4f43f59ac587ade155c654b45c5b4c0ba2a64711 | Chunk: 2 [^11]: nev_solid_state_battery_dgzq | File: nev_solid_state_battery_dgzq.pdf | Index: content_library | Doc ID: 75b24bdbe20de412e82f661df631b8e09c5ea2d27b60f5cc6c5b844bdd2f8765 | Chunk: 1 [^12]: nev_solid_state_battery_dgzq | File: nev_solid_state_battery_dgzq.pdf | Index: content_library | Doc ID: 75b24bdbe20de412e82f661df631b8e09c5ea2d27b60f5cc6c5b844bdd2f8765 | Chunk: 1 [^13]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 48801b73562f0c49a42ce312a89098c89dc29fc4242a85f4e1a791ec8e669271 | Chunk: 2 [^14]: 中银证券_新能源汽车行业2026年度策略 | File: 中银证券_新能源汽车行业2026年度策略.pdf | Index: content_library | Doc ID: 4033d12f5a9c0b624ee9c3983839ce259cf1c59e50359a6395f9a8e371f222a5 | Chunk: 3 [^15]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 4e301de3184d02a500d2b204ab7249314bba5b02916996e9d0d753315d21f409 | Chunk: 4 [^16]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 4e301de3184d02a500d2b204ab7249314bba5b02916996e9d0d753315d21f409 | Chunk: 4 [^17]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: 5b946310faa66140a4be664c8fc0708606a8bafa0eaef20d99af89a1af885cfb | Chunk: 3 [^18]: solid_state_battery_industry_ajzq | File: solid_state_battery_industry_ajzq.pdf | Index: content_library | Doc ID: d82b5c67c8e44be1035430ec4a8341f2c9362fd2843601d0c5361a00caead690 | Chunk: 6