Novel solid-state electrolyte developed to enhance performance of all-solid-state lithium-ion batteries

All-solid-state lithium-ion batteries (ASSBs) have garnered consideration for his or her excessive power density and superior security. Nevertheless, their commercialization stays difficult as a result of lack of solid-state electrolytes (SSEs) with each excessive ionic conductivity and steady interfaces. To this point, only some SSEs have achieved ionic conductivities exceeding 10 mS/cm at room temperature.

Lately, a analysis group led by Prof. Wu Zhongshuai and Assoc. Prof. Shi Haodong from the Dalian Institute of Chemical Physics (DICP) of the Chinese language Academy of Sciences (CAS) developed excessive ionic conductivity sulfide-based solid electrolytesenhancing the efficiency of ASSBs. The examine is revealed in ACS Energy Letters.

Researchers developed the novel electrolyte, Li_20/3(GeSiSb)_1/3S₅I (LGSSSI), by using a multi-cation (Ge, Si, Sb) doping and substitution technique. The electrolyte exhibited distinctive ionic conductivity, attributed to its low lithium-ion migration activation power (0.17 eV). After chilly urgent, LGSSSI achieved an ionic conductivity of 12.7 mS/cm, which additional elevated to 32.2 mS/cm after sizzling urgent.

Built-in with LGSSSI, ASSBs achieved excessive biking stability underneath ultra-high cathode mass loading (100 mg/cm²) and throughout a large temperature vary (-20°C to 60°C). As well as, LGSSSI demonstrated wonderful interfacial compatibility with varied cathode and anode materialstogether with LiNi_0.8Mn_0.1Co_0.1O₂LiCoO₂ cathodes, lithium-indium alloy, and silicon-carbon composite anodes.

“Our study lays a foundation for achieving ASSBs with wide temperature adaptability, high cathode loading, and long cycle life,” mentioned Prof. Wu.