储能科学与技术2025，Vol.14Issue(6)：2193-2199,7.DOI:10.19799/j.cnki.2095-4239.2024.1203
基于Li10GeP12S2全固态电池关键材料的热稳定性
Thermal stability of key materials in Li10GeP12S2-based all-solid-state batteries
摘要
Abstract
All-solid-state lithium batteries(ASSLBs)are promising candidates for next-generation energy storage systems because of their wide operating temperature range,high energy density,and high power density.The sulfide solid electrolyte Li10GeP12S2(LGPS)has attracted significant attention for its exceptionally high lithium-ion conductivity(1×10-3 S/cm).However,the thermal stability of key materials in LGPS-based ASSLBs under high energy density configurations has not been reported.This study examines the thermal runaway mechanisms of LGPS solid electrolytes combined with a LiNi0.92Co0.04Mn0.04O2(NCM92)cathode and silicon-carbon anode.Differential scanning calorimetry and simultaneous thermal analysis-mass spectrometry were employed to analyze heat generation and gas evolution in solid electrolytes,electrodes,and their mixtures.Following thermal analysis,scanning electron microscopy combined with energy-dispersive spectroscopy,X-ray diffraction,and X-ray photoelectron spectroscopy were used to characterize the reaction products at different temperatures.At 200℃,the NCM92 cathode undergoes a phase transition,releasing a significant amount of oxygen that reacts mildly with the sulfide electrolyte to form P2Sₓ and trace SO2.At 310℃,the LGPS and the cathode mixture exhibited exothermic reactions,producing metal oxides,sulfides,and phosphates.This study elucidates the thermal stability of key materials in NCM92|LGPS|SiC ASSLBs,providing theoretical guidance for material selection and safety-oriented design optimization.关键词
全固态锂电池/Li10GeP12S2/高能量密度/热稳定性Key words
all-solid-state lithium batteries/Li10GeP12S2/high energy density/thermal stability分类
信息技术与安全科学引用本文复制引用
张文杰,任东生,吴宇,芮新宇,刘翔,冯旭宁,卢兰光..基于Li10GeP12S2全固态电池关键材料的热稳定性[J].储能科学与技术,2025,14(6):2193-2199,7.基金项目
国家重点研发计划(2022YFB3807700),国家自然科学基金(52476174,52477215,52076121). （2022YFB3807700）
