What is semi-solid state battery technology and which Chinese EVs use it?
Semi-solid batteries are the bridge between today's liquid-electrolyte NCM and tomorrow's all-solid-state. They're already in production.
What 'semi-solid' means
The electrolyte is a gel or partial solid at the electrode interface; the rest of the cell still uses liquid electrolyte.
Result: reduced dendrite formation, higher energy density, wider temperature tolerance.
Production models
NIO ET7 150 kWh (semi-solid, WeLion): 1,050 km CLTC, in production since 2024.
IM L6 130 kWh (WeLion Enrich semi-solid): 1,000+ km CLTC.
Aion Hyper GT (Aion Magazine semi-solid): coming 2026.
Trade-offs
Cost: 2–3x per kWh of standard NCM in 2026.
Cycle life: still being characterised — expected 1,500 cycles vs 2,000 for standard NCM.
Charging speed: currently limited to ~2C (semi-solid is optimised for range, not speed).
- 01Semi-solid is in production today, not future tech.
- 02NIO ET7 150 kWh is the flagship.
- 03Cost and cycle-life trade-offs remain.
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