编号：CYYJ03476
篇名：通过双掺杂增强Li7P2.9Sb0.1S10.65O0.15I0.2电解质用于高性能全固态锂硫电池
作者：赵博生 陈鹏 高学平
关键词： 锂硫电池 硫化物固体电解质 放电比容量 离子导电性 空气稳定性 离子电导率 电极界面 锂枝晶
机构： Institute of New Energy Material Chemistry
摘要： Sulfide solid electrolyte is a promising candidate for the development of high-energy lithium-sulfur(Li-S)batteries.However,the concurrent improvement of ionic conductivity,bulk air stability,and compatibility of the electrolyte/electrode interface of sulfide solid electrolyte remains a huge challenge.Herein,we propose a dual-source doping(Sb2O3and LiI)strategy to prepare a multifunctional sulfide solid electrolyte.Sb2O3can broaden the transmission path of lithium ions and improve the bulk stability,and LiI can inhibit the generation of lithium dendrites and reduce the electrolyte/electrode resistance.Therefore,the sulfide solid electrolyte can be strengthened in terms of its bulk and interface,thus exhibiting a high ionic conductivity of 1.69×10-3S cm-1at 30℃,high air stability,and high electrochemical stability with lithium metal.On this basis,the as-prepared all-solid-state Li-S batteries(ASSLSBs)can exhibit a high specific discharge capacity after being cycled at 0.05 C for 100 cycles at room temperature(833 mA h g-1)or 60℃(949 mA h g-1).This work provides a rational scheme for the preparation of practical sulfide solid electrolytes and high-performance ASSLSBs.
