Abstract
Garnet-type solid-state batteries(SSBs)are con-sidered to be one of the most promising candidates to realize next-generation lithium metal batteries with high energy density and safety.However,the dendrite-induced short-cir-cuit and the poor interfacial contact impeded the practical application.Herein,interface engineering to achieve low interfacial resistance without high temperature calcination was developed,which Li6.4La3Zr1.4Ta0.6O12(LLZTO)was simply coated with complex hydride(Li4(BH4)3I(3L1L))in various mass ratios n(Li4(BH4)3I)-(100-n)LLZTO(10 ≤ n≤ 40).The interfacial conductivity increases by more than three orders of magnitude from 8.29 × 10-6 S·cm-1 to 1.10 × 10-2 S.cm-1.Symmetric Li cells exhibit a high critical current density(CCD)of 4.0 mA·cm-2 and an excellent cycling stability for 200 h at 4.0 mA·cm-2.SSBs with polymeric sulfur-polyacrylonitrile(SPAN)cathode achieve a high discharge capacity of 1149 mAh·g-1 with a capacity retention of 91％after 100 cycles(0.2 C).This attempt guides a simple yet efficient strategy for obtaining a stable Li/LLZTO interface,which would promote the devel-opment of solid-state batteries.
基金项目
国家自然科学基金(52171180)
国家自然科学基金(51802154)
国家自然科学基金(51971065)
国家杰出青年科学基金(51625102)
Innovation Program of Shanghai Municipal Education Commission(2019-01-07-00-07-E00028)
中央高校基本科研业务费专项(NG2022005)
Open Fund for Graduate Innovation Base in Nanjing University of Aeronautics and Astronautics(xcxjh20210612)
中央高校基本科研业务费专项(NS2021043)
NETL
NSTL
万方数据