Dual-interlayers constructed by Ti_(3)C_(2)T_(x)/ionic-liquid for enhanced performance of solid garnet batteries  

作　　者：Xi Wang Yong Wang Yiyu Wu Yunmiao Fan Yang Tian 

机构地区：[1]Department of Chemistry,Analytical Instrumentation Center,Capital Normal University,Beijing 100048,China

出　　处：《Journal of Energy Chemistry》2023年第3期47-55,I0002,共10页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(NSFC)(52172096)。

摘　　要：Li(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO) solid garnet-type electrolyte has been widely reported due to its outstanding safety and electrochemical stability.However,the inherent rigidity and brittleness of LLZTO lead to poor contact with anode/cathode and the operation failure of full cells.Herein,the dual-interlayers are constructed as the fast interfacial ion-migration channel by using Ti_(3)C_(2)T_(x)(MXene,Txis-O,-OH,-F) with trace ionic liquid(IL),which promote the intimate contact between LLZTO and anode/cathode and suppress Li-dendrites growth.Notably,IL can wet the cathode to promote intimate interface contact and be decomposed into some inorganic compounds(such as Li3N,LiF,and Li2Sx),resulting in reduced interfacial resistance and fast Li-ion transportation.Consequently,in the prepared Li-symmetric cell,the interfacial resistance on the anode side plunges to 33.1 Ω cm^(-2),and stably maintains over 1000 h without short circuit at 0.05 mA cm^(-2).The full cell of Li|LiFePO4delivers a high initial capacity of 158.52 mA h g^(-1)and outstanding retention of 90.18% after 100 cycles at 60℃ and 0.2 C.Our work provides an efficient strategy to design dual-interlayers between LLZTO and anode/cathode for the interfacial modification to enhance the performance of solid garnet batteries.

关 键 词：MXene composite Interfacial modification Garnet electrolyte Solid battery Ion-transportation 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]