Magnesium Borate Fiber Coating Separators with High Lithium-Ion Transference Number for Lithium-Ion Batteries

被引：17

作者：

Wang, Xin ^{[1
]}

Peng, Longqing ^{[1
]}

Hua, Haiming ^{[1
]}

Liu, Yizheng ^{[2
]}

Zhang, Peng ^{[2
]}

Zhao, Jinbao ^{[1
,2
]}

机构：

[1] Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn,State Key Lab Phys Chem Sol, Engn Res Ctr Electrochem Technol,Minist Educ,Stat, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Coll Energy, Xiamen 361005, Peoples R China

来源：

CHEMELECTROCHEM | 2020年 / 7卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Lithium ion battery; Mg2B2O5; fibers; Lithium ion transference number; SOLID POLYMER ELECTROLYTES; ATOMIC LAYER DEPOSITION; ELECTROCHEMICAL PROPERTIES; POLYETHYLENE SEPARATORS; CONDUCTIVITY; GROWTH; ESTER; BORON;

D O I：

10.1002/celc.201901916

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, magnesium borate fiber (MBO) is used as a functional ceramic to coat onto a polypropylene (PP) separator (MBO@PP). This MBO coating layer increases the lithium-ion transference number (t(Li+)) from 0.24 to 0.57 in the LiPF6-based electrolyte due to the MBO acting as Lewis acid sites interacts with Lewis base PF6- . The increase in the t(Li+) reduces the concentration polarization and promotes the migration of lithium ions. Besides, the prepared MBO@PP separator has better wettability with liquid electrolyte, the electrolyte uptake as well as thermal stability. The LiFePO4 half-coin with MBO@PP separator not only had better cycle stability, but also had a higher capacity retention rate at high current.

引用

页码：1187 / 1192

页数：6

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