A homogenous solid polymer electrolyte prepared by facile spray drying method is used for room-temperature solid lithium metal batteries  

作　　者：Zehao Zhou Tong Sun Jin Cui Xiu Shen Chuan Shi Shuang Cao Jinbao Zhao 

机构地区：[1]College of Physics,Qingdao University,Qingdao 266071,China [2]Collaborative Innovation Center of Chemistry for Energy Materials,State Key Lab of Physical Chemistry of Solid Surfaces,State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle,Engineering Research Center of Electrochemical Technology,Ministry of Education,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [3]College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Nano Research》2023年第4期5080-5086,共7页纳米研究（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(No.21805147).

摘　　要：The aggregation of inorganic particles with high mass ratio will form a heterogeneous electric field in the solid polymer electrolytes(SPEs),which is difficult to be compatible with lithium anode,leading to inadequate ionic conductivity.Herein,a facile spray drying method is adopted to increase the mass ratio of inorganic particles and solve the aggregation problems of fillers simultaneously.The polyvinylidene fluoride(PVDF)with lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)covers the surface of each Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)granules during the nebulization process,then forming flat solid electrolytes via layer-by-layer deposition.Characterized by the atomic force microscope,the obtained solid electrolytes achieve a homogenous dispersion of Young’s modulus and surface electric field.As a result,the as-prepared SPEs present high tensile strength of 7.1 MPa,high ionic conductivity of 1.86×10^(−4)S·cm^(−1)at room temperature,and wide electrochemical window up to 5.0 V,demonstrating increased mechanical strength and uniform lithium-ion migration channels for SPEs.Thanks to the as-prepared SPEs,the lithiumsymmetrical cells show a highly stable Li plating/stripping cycling for over 1,000 h at 0.1 mA·cm^(−2).The corresponding Li/LCoO_(2)batteries also present good rate capability and excellent cyclic performance with capacity retention of 80%after 100 cycles at room temperature.

关 键 词：solid polymer electrolytes spray drying homogenous dispersion solid lithium batteries polyvinylidene fluoride/Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(PVDF/LLZTO) surface electric field 

分 类 号：TM912[电气工程—电力电子与电力传动]