Porous garnet as filler of solid polymer electrolytes to enhance the performance of solid-state lithium batteries  

作　　者：Yang Zhang Lei Zhang Peng Guo Chaoyan Zhang Xiaochuan Ren Zhen Jiang Jianjun Song Chuan Shi 

机构地区：[1]College of Physics,Qingdao University,Qingdao 266071,China [2]Industrial Research Institute of Nonwovens and Technical Textiles,College of Textiles and Clothing,Qingdao University,Qingdao 266071,China [3]Department of Chemistry,University of Pennsylvania,Philadelphia,PA 19104,USA

出　　处：《Nano Research》2024年第4期2663-2670,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21805147);Natural Science Foundation of Shandong Province(No.ZR202211240080).

摘　　要：In order to enhance the ionic conductivity of solid polymer electrolytes(SPEs)and their structural rigidity against lithium dendrite during lithium-ion battery(LIB)cycling,we propose porous garnet Li6.4La3Zr2Al0.2O12(LLZO),as the filler to SPEs.The porous LLZO with interlinked grains was synthesized via a resol-assisted cationic coordinative co-assembly approach.The porous structure of LLZO with high specific surface area facilitates the interaction between polymer and filler and provides sufficient entrance for Li^(+)migration into the LLZO phase.Furthermore,the interconnection of LLZO grains forms continuous inorganic pathways for fast Li^(+)migration,which avoid the multiple diffusion for Li^(+)in interface.As a result,the SPEs with porous LLZO(SPE-PL)show a high ionic conductive of 0.73 mS·cm^(-1) at 30℃ and lithium-ion transference number of 0.40.The porous LLZO with uniformly dispersed pores also acts as an ion distributor to regulate ionic flux.The lithium-symmetrical batteries assembled with SPE-PL show a highly stable Li plating/stripping cycling for nearly 3000 h at 0.1 mA·cm^(-2).The corresponding Li/LiFePO_(4) batteries also exhibit excellent cyclic performance with capacity retention of 75%after nearly 500 cycles.This work brings new insights into the design of conductive fillers and the optimization of SPEs.

关 键 词：solid polymer electrolytes lithium metal battery porous conductive filler solid state battery 

分 类 号：TM912[电气工程—电力电子与电力传动]