Sandwich-type composited solid polymer electrolytes to strengthen the interfacial ionic transportation and bulk conductivity for all-solid-state lithium batteries from room temperature to 120℃  

作　　者：Jiewen Tan Zhen Wang Jiawu Cui Zhanhui Jia Wensheng Tian Chao Wu Chengxin Peng Chengyong Shu Kang Yang Wei Tang 

机构地区：[1]School of Chemical Engineering and Technology,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China [2]Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano),State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China [3]State Key Laboratory of Space Power-sources Technology,Shanghai Institute of Space Power-Sources,Shanghai 200245,China [4]School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [5]Top-Energy Digital Manufacturing Technologies(Xi'an)Co.,Ltd.,Xi'an 710100,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2024年第8期288-295,I0007,共9页能源化学（英文版）

基　　金：supported by the National Key R&D Program of China(2021YFB2400400);the National Natural Science Foundation of China(Grant No.22379120,22179085);the Key Research and Development Plan of Shanxi Province(China,Grant No.2018ZDXM-GY-135,2021JLM-36);the National Natural Science Foundation of China(Grant No.22108218);the“Young Talent Support Plan”of Xi’an Jiaotong University(71211201010723);the Qinchuangyuan Innovative Talent Project(QCYRCXM-2022-137);the“Young Talent Support Plan”of Xi’an Jiaotong University(HG6J003);the“1000-Plan program”of Shaanxi Province。

摘　　要：The insurmountable charge transfer impedance at the Li metal/solid polymer electrolytes(SPEs)interface at room temperature as well as the ascending risk of short circuits at the operating temperature higher than the melting point,dominantly limits their applications in solid-state batteries(SSBs).Although the inorganic filler such as CeO_(2)nanoparticle content of composite solid polymer electrolytes(CSPEs)can significantly reduce the enormous charge transfer impedance at the Li metal/SPEs interface,we found that the required content of CeO_(2)nanoparticles in SPEs varies for achieving a decent interfacial charge transfer impedance and the bulk ionic conductivity in CSPEs.In this regard,a sandwich-type composited solid polymer electrolyte with a 10%CeO_(2)CSPEs interlayer sandwiched between two 50%CeO_(2)CSPEs thin layers(sandwiched CSPEs)is constructed to simultaneously achieve low charge transfer impedance and superior ionic conductivity at 30℃.The sandwiched CSPEs allow for stable cycling of Li plating and stripping for 1000 h with 129 mV polarized voltage at 0.1 mA cm^(-2)and 30℃.In addition,the LiFePO_(4)/Sandwiched CSPEs/Li cell also exhibits exceptional cycle performance at 30℃and even elevated120℃without short circuits.Constructing multi-layered CSPEs with optimized contents of the inorganic fillers can be an efficient method for developing all solid-state PEO-based batteries with high performance at a wide range of temperatures.

关 键 词：PEO-based solid electrolytes CeO_(2)nanoparticles Charge transfer impedance Sandwich-type composite electrolytes All-solid-state Li metal batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]