China's first sulfide SSB road test completed; 30GWh projects surge

This week (July 31 – August 6, 2026) saw a triple convergence of technological validation, capacity deployment, and capital influx in the solid-state battery industry. Zhongke Yuanben completed China's first on‑road vehicle test of a sulfide‑based all‑solid‑state battery, validating full‑stack technology integration. Sinocera finished construction of its sulfide electrolyte mass‑production line, while Ronbay Technology approaches a 100‑ton‑level cathode material demand. Tuoyi Guneng announced a RMB 6 billion, 30 GWh project in Inner Mongolia, and Weilan New Energy launched a Pre‑IPO round at a RMB 20 billion valuation. Overseas, Solid Power advanced its continuous electrolyte pilot line, and Factorial partnered with SK On to explore using existing Li‑ion production facilities for solid‑state battery manufacturing. 2026, as a critical window for industrialization, is shifting from "single‑point breakthroughs" to "systematic advancement."

I. Materials: Sulfide Electrolyte Production Accelerates; Cathode Material Demand Approaches 100‑Ton Level

1.1 Core Price Trends (July 31 – August 6): Sulfides Down Sharply, Oxides Bottom Out

• Sulfide electrolyte LPSC dropped to RMB 4,400/kg this week, a cumulative monthly decline of 34.3%, driven mainly by concentrated downstream purchasing and price pressure. Sinocera's announcement of its automated sulfide electrolyte line further reinforced expectations of rising supply.

• Battery‑grade lithium sulfide was quoted at RMB 1,320/kg, down 9.0% month‑on‑month but only 0.8% this week, indicating slowing downward momentum. While Gotion’s 20,000‑ton project and Tinci’s pilot line point to long‑term supply loosening, actual available volumes remain limited in the near term, curbing further declines.

• Oxide electrolytes LLZO/LATP remained stable at RMB 638/kg and RMB 93/kg respectively, having traded flat for several consecutive days. Sustained downstream demand from semi‑solid battery coating separators and cathode additives supports the market; SMM data suggests H2 output of 2,000‑2,500 tons, providing a firm floor.

1.2 Industry Dynamics

Zhongke Yuanben's successful on‑road test of a sulfide all‑solid‑state battery boosted confidence in the sulfide route. Green Eco‑Manufacture’s 500‑ton pilot base in Wuxi received approval. Overall, sulfide material prices are still seeking a bottom, while oxides have stabilised first.

The most prominent signal this week was the substantive construction of mass‑production capacity for sulfide electrolytes. On August 5, Sinocera announced at an analyst meeting that its automated sulfide electrolyte production line is complete, with initial mass‑production capability and high customer acceptance, and it will scale up according to market demand. This marks a key transition from lab‑scale samples to production‑line supply.

Cathode materials: Ronbay Technology is advancing both semi‑solid and all‑solid‑state material development. For all‑solid‑state, it focuses on new ternary and lithium‑rich manganese‑based cathode materials; samples have received positive feedback from clients, and the process is compatible with existing ternary production lines. It expects to see nearly 100‑ton market demand this year, entering small‑batch production in 2027. For electrolytes, the company plans to complete a ten‑ton‑level sulfide electrolyte line this year. This reinforces our view that cathode material industrialisation is progressing faster than electrolyte production, mainly because cathodes can leverage existing ternary lines with limited near‑term capex.

Shandong Chuanglu has completed pilot verification for its full range of solid‑state electrolytes and lithium‑rich manganese‑based cathodes; its 150‑ton/year electrolyte line is installed and commissioned, and its thousand‑ton cathode line has entered trial production.

Xiangtan Electrochemical’s subsidiary Guangxi Lijin is co‑developing manganese‑based lithium applications for semi‑solid/solid‑state batteries and low‑temperature power markets, with breakthroughs expected by end‑2026 or early 2027; no revenue impact yet.

Mingguan New Materials has completed client sample trials of its high‑temperature‑resistant aluminium‑plastic film for solid‑state batteries, using a 120°C‑resistant modified resin that improves peel strength by over 40% at 85°C and over 50% at 120°C. This “hidden link” in the solid‑state supply chain deserves close attention.

II. Battery Cells: China’s First Sulfide All‑Solid‑State Road Test Completed; Safety Validation Takes a Big Step

The most milestone event this week was Zhongke Yuanben’s sulfide all‑solid‑state battery completing a real‑vehicle road test – the first publicly reported instance of a sulfide all‑solid‑state battery installed in a vehicle in China. The battery pack consists of 16 20Ah‑class sulfide all‑solid‑state cells, with system energy density and voltage platform highly matched to the vehicle’s original electronic control system. Dr. Wang Jiutian, CTO of Zhongke Yuanben, stated that the test successfully verified the full‑stack technology integration from material innovation to cell assembly.

Technical parameters: The battery uses nano‑homogeneous coated high‑nickel ternary cathodes, sulfide solid electrolytes, and silicon‑carbon composite anodes. Cell dimensions are 25 cm × 14 cm, energy density >265 Wh/kg, with measured capacities of 26.3 Ah and 55.1 Ah. This systematically validates the adaptability, feasibility, and stability of the sulfide route under real‑world driving conditions.

GAC Giant’s all‑solid‑state cell passed the new national standard (GB 38031‑2025) nail penetration test: a 40Ah fully charged cell was pierced and remained stable after extended observation. The cell uses its self‑developed ESC deep‑eutectic composite solid electrolyte system with no free liquid electrolyte, limiting damage to the puncture site.

Gotion High‑Tech’s “Jinshi” all‑solid‑state battery is moving from demonstration to mass production; its 2 GWh line construction is progressing and has engaged multiple scenario customers.

III. Projects: Capacity Deployment Accelerates; 30 GWh‑Scale Projects Emerge

The most notable project this week is Tuoyi Guneng’s RMB 6 billion solid‑state battery plant in Inner Mongolia’s Chilechuan, with a planned total capacity of 30 GWh, built in three phases (RMB 2 billion and 10 GWh per phase). To date, Inner Mongolia has hosted 6 solid‑state battery projects (announced or filed) with a combined capacity of 47.2 GWh and total investment of RMB 16.8 billion.

Other projects under construction or advancing:

• Guangdong Shanhui – RMB 2 billion, 3 GWh all‑solid‑state battery plant in Yangjiang, covering digital, agricultural machinery, drone, power storage, and energy storage markets.

• Weilan New Energy – broke ground on its Guangdong‑Hong Kong‑Macao Greater Bay Area Green Valley solid‑state battery industrial park in Guangzhou.

• Sichuan Saike Power – 0.1 GWh all‑solid‑state smart pilot line in Yibin, expected by end‑2026, focusing on the sulfide route.

• Enpower – its 2 GWh semi‑solid battery base in Chuzhou, Anhui, achieved full capacity ramp‑up in July 2026.

• Guosheng Global – first‑line equipment for its 10 GWh solid‑state battery industrial chain project in Tieling was moved into the workshop in July.

• Hukou Solid‑State Energy Storage Battery Project – planning 6 GWh all‑solid‑state capacity.

From a geographic perspective, Inner Mongolia is emerging as a new hub for solid‑state battery manufacturing due to its energy resource advantages, while Guangdong, Sichuan, and Anhui are also accelerating their presence. Industry consensus is that 2026 is a critical window for solid‑state battery industrialisation breakthroughs.

IV. Financing & Partnerships: Pre‑IPO and Series A Rounds Coexist; Capital Interest Remains High

Financing:

• Weilan New Energy is advancing a RMB 2 billion Pre‑IPO round at a pre‑money valuation of about RMB 20 billion; it completed GEM IPO tutoring filing in December 2025 and plans to list on the A‑share ChiNext.

• Qingtao Energy, another unicorn, filed for a Hong Kong IPO in April 2026, aiming to raise USD 700‑900 million, with a valuation of about RMB 27.9 billion after its Series H round in February 2026.

• ProLogium announced on July 28 that it received USD 50 million (approx. RMB 338 million) in equity financing from its existing shareholder consortium, part of the merger with SPAC TDAC; it plans to list on Nasdaq under “PRLG” at a pre‑transaction valuation of USD 3.8 billion.

• Keyuan Solid Energy received Series A investment from Yueke Xintai to support R&D and industrialisation of solid electrolytes and semi‑solid cells.

• Zhihua Energy completed Series C financing to expand silicon‑carbon anode material R&D and capacity.

Partnerships:

• Envision AESC filed a patent for “solid electrolyte membrane and solid‑state battery” with a three‑layer structure combining halide electrolyte, sulfide electrolyte, and fluorinated polyimide + COF material.

• Green Eco‑Manufacture’s Wuxi pilot and industrialisation base for high‑performance solid‑state cathode and electrolyte materials (RMB 120 million investment) received environmental approval.

• Jinlongyu’s solid‑state battery material project obtained a construction permit.

V. Overseas Progress: Solid Power’s Losses Widen but Production Line Advances; Factorial Partners with SK On

Solid Power reported Q2 2026 results: net loss of USD 23.8 million ($0.11/share), beating the expected $0.1224 loss, but revenue was negative $0.3 million due to adjustments to milestone payment assumptions under the SK On R&D license agreement, reversing $1.2 million recognised in Q1.

Production line: The continuous electrolyte pilot line construction is on schedule; major equipment (including a rotary kiln installed in May) is in place. Equipment acceptance testing is expected in Q3, plant validation and operations startup in Q4, and commissioning by year‑end with first products in Q1 2027. The line has a designed capacity of 45 tons.

Partnerships: Solid Power continues joint evaluation agreements with Samsung SDI and BMW, sending electrolyte samples. The initial phase of these agreements ends in September, and discussions on continued cooperation are ongoing. It is also actively pursuing a commercial‑scale electrolyte joint venture in Korea, with three potential partners, one of which has progressed to a term‑sheet stage; an announcement is expected by year‑end. The company also completed a line installation agreement with SK On and received milestone payments.

Factorial Energy signed an MOU with SK On to jointly assess the technical feasibility of using SK On’s existing Li‑ion manufacturing facilities to produce Factorial’s solid‑state batteries. If successful, this model could significantly lower the barrier to solid‑state battery industrialisation by leveraging existing Li‑ion lines.

Samsung SDI announced it will invest KRW 25 trillion (over RMB 130 billion) from 2026 to 2040 to expand its Ulsan and Cheonan plants, with the Ulsan facility to include an all‑solid‑state battery mass‑production line.

Georgia Institute of Technology reported an amorphous ZrCl₄‑based solid electrolyte with raw material costs of only ~$21/kg, offering a low‑cost path for all‑solid‑state battery commercialisation.

VI. Industry Voices

• Zhou Fu, Senior Vice President of Gotion High‑Tech (August 3): The battery consumption tax adjustment is an industry shake‑out; short‑term cost pressure is manageable but will accelerate the exit of lagging capacity, concentrating market share among leaders. The Jinshi all‑solid‑state battery is moving from demonstration to mass production.

• Liang Rui, Vice President of Sunwoda: The lithium battery industry has entered a phase of “true competency” competition; Sunwoda does not engage in price wars and is steadily advancing solid‑state batteries.

• Dr. Wang Jiutian, CTO of Zhongke Yuanben: The road test successfully verified full‑stack technology integration from basic material innovation to cell assembly.

Conclusion

This week, the solid‑state battery industry demonstrated a “triple resonance” of technological validation breakthroughs, accelerating capacity deployment, and sustained capital inflow. The completion of China’s first sulfide all‑solid‑state road test by Zhongke Yuanben, Sinocera’s sulfide electrolyte production line, Tuoyi Guneng’s 30 GWh project in Inner Mongolia, and Weilan New Energy’s RMB 20 billion Pre‑IPO financing – from materials to cells, from projects to capital – all signal that solid‑state battery industrialisation is moving from “single‑point breakthroughs” to “systematic advancement.” Overseas, Solid Power’s line progress and the Factorial‑SK On collaboration merit continued monitoring. 2026, as a pivotal window for industrialisation, is being increasingly validated by tangible progress.

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