Nonflammable thermal-responsive electrolyte

Safe and durable

This electrolyte suppresses thermal runaway and gas evolution through robust interphase formation, enhancing both cycle life and safety of sodium-ion batteries.

Du, Li · Dong, Tiantian · Xie, Bin · Wang, Jialiang · Qi, Zhang · Wang, Shitao · Zhang, Jianjun · Zhou, Gang · Xu, Gaojie · Cui, Guanglei

Energy Storage Materials 2026

Specifications

Capacity retention

{'zh': '81.3', 'en': '81.3'} %

Cycle number

{'zh': '2000', 'en': '2000'}

Advantages

Nonflammable

Accelerating rate calorimetry confirms that the formulated nonflammable electrolyte prevents the thermal runaway process of the 1 Ah sodium ion pouch cell.

Longer cycling

The 1 Ah pouch cell achieves 81.3% capacity retention after 2000 cycles, outperforming NaPF6-based electrolytes.

Less gas

Robust interphase layers suppress continuous electrolyte decomposition and gas evolution on both electrodes.

Applications

• sodium-ion batteries：Directly replace the conventional NaPF6-carbonate electrolyte in sodium-ion cells.
• high-safety batteries：For applications requiring no thermal runaway, such as grid storage and EVs.
• electrochemical energy storage：Extend cycle life and eliminate fire hazards in energy storage systems.
• battery management and integration：Reduce the burden on battery management systems for safety monitoring.