Improving Ionic Conductivity and Lithium-Ion Transference Number in Lithium-Ion Battery Separators

被引：158

作者：

Zahn, Raphael ^{[1
]}

Lagadec, Marie Francine ^{[1
]}

Hess, Michael ^{[1
]}

Wood, Vanessa ^{[1
]}

机构：

[1] Eidgenoess Tech Hsch Zurich, Dept Informat Technol & Elect Engn, Lab Nanoelect, CH-8092 Zurich, Switzerland

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 48期

基金：

瑞士国家科学基金会;

关键词：

lithium-ion battery; separator; electrolyte conductivity; lithium-ion transference number; surface modification; polyelectrolyte; layer-by-layer; POLYELECTROLYTE MULTILAYERS; POLYMER ELECTROLYTES; POLYETHYLENE; PLASMA; PERFORMANCE; ADSORPTION; MEMBRANES; BLENDS;

D O I：

10.1021/acsami.6b12085

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure of lithium-ion battery separators plays an important role in separator performance; however, here we show that a geometrical analysis falls short in predicting the lithium-ion transport in the electrolyte-filled pore space. By systematically modifying the surface chemistry of a commercial polyethylene separator while keeping its microstructure unchanged, we demonstrate that surface chemistry, which alters separator electrolyte interactions, influences ionic conductivity and lithium-ion transference number. Changes in separator surface chemistry, particularly those that increase lithium-ion transference numbers can reduce voltage drops across the separator and improve C-rate capability.

引用

页码：32637 / 32642

页数：6

共 28 条

[1] Battery separators [J].