High-conductivity free-standing Li6PS5Cl/poly(vinylidene difluoride) composite solid electrolyte membranes for lithium-ion batteries

被引：92

作者：

Wang, Shuo ^{[1
,2
]}

Zhang, Xue ^{[1
]}

Liu, Sijie ^{[1
]}

Xin, Chengzhou ^{[1
]}

Xue, Chuanjiao ^{[1
]}

Richter, Felix ^{[2
]}

Li, Liangliang ^{[1
]}

Fan, Lizhen ^{[3
]}

Lin, Yuanhua ^{[1
]}

Shen, Yang ^{[1
]}

Janek, Juergen ^{[2
]}

Nan, Ce-Wen ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Justus Liebig Univ Giessen, Inst Phys Chem & Ctr Mat Res, Heinrich Buff Ring 17, D-35392 Giessen, Germany

[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

来源：

JOURNAL OF MATERIOMICS | 2020年 / 6卷 / 01期

关键词：

Composite solid electrolyte; Li6PS5Cl; Poly(vinylidene difluoride); ELECTROCHEMICAL PERFORMANCE; GROWTH; THIN;

D O I：

10.1016/j.jmat.2019.12.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bulk-type all-solid-state batteries (ASSBs) using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and safety. However, cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as anode. For achieving high-performance ASSBs, creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is essential. In this work, we present Li6PS5Cl/poly(vinylidene difluoride) (LPSCl/PVDF) composite electrolytes prepared by a slurry method. The influence of the PVDF content on the microstructure, morphology, ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically investigated. Free-standing LPSCl/PVDF membranes with a thickness of 100-120 mu m and a high ionic conductivity of about 1.10(-3) S cm(-1) at 25 degrees C are obtained. After adding PVDF to the LPSCl electrolyte, the cycling stability of the LPSCl electrolyte against lithium metal improves significantly. Therefore, LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs. (c) 2020 The Chinese Ceramic Society. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：70 / 76

页数：7

共 20 条

[1] Electrochemical performance of bulk-type all-solid-state batteries using small-sized Li7P3S11 solid electrolyte prepared by liquid phase as the ionic conductor in the composite cathode [J].