Sandwich structured PVDF-HFP-based composite solid electrolytes for solid-state lithium metal batteries

被引：11
作者：
Xu, Kang [1 ]
Xu, Chao [1 ]
Jiang, Yujie [1 ]
Cai, Jinhai [1 ]
Ni, Jiaxi [1 ]
Lai, Chunyan [1 ]
机构：
[1] Shanghai Univ Elect Power, Shanghai Key Lab Mat Protect & Adv Mat Elect Powe, Shanghai 200090, Peoples R China
来源：
IONICS | 2022年 / 28卷 / 07期
关键词：
Composite solid electrolyte; Sandwich structure; Lithium dendrite; Solid-state lithium metal battery; POLYMER ELECTROLYTES; IONIC-CONDUCTIVITY; STABILITY; ANODE;
D O I：
10.1007/s11581-022-04599-z
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：
It is crucial to develop solid electrolyte with good mechanical and electrochemical stability for the application of lithium metal battery. In this work, a sandwich-structured composite solid electrolyte is designed and prepared based on the blend of polyvinylidene fluoride-hexafluoropropylene/polyacrylonitrile (PVDF-HFP/PAN) polymer, Li6.46La3Zr1.46Ta0.54O12 as filler, and a layer of PE film is introduced in the middle to act as a skeleton. The sandwich-structured PVDF-HFP/PAN-10%LLZTO-PE composite solid electrolyte displays a tensile strength of 66.58 MPa, high ionic conductivity of 2.28 x 10(-4) S/m at 25 degrees C, wide electrochemical stable window of 4.8 V, and high lithium ion transfer number of 0.44. The LiFePO4 | PVDF-HFP/PAN-10%LLZTO-PE | Li coin battery shows a high specific capacity of 161.9 mAh/g and retains 150.2 mAh/g after 300 cycles at 1 C. Furthermore, the LiFePO4 | PVDF-HFP/PAN-10%LLZTO-PE | Li pouch battery shows excellent safety and functionality.
引用
收藏
页码：3243 / 3253
页数：11
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