Preparation and Characterization of Cellulose Acetate-based Separator for Lithium-ion batteries

Authors

Hua-feng LUO, Coal Engineering College, Shanxi Datong University, Datong 037003, Shanxi, China;Follow
Yuan-dong QIAO, Coal Engineering College, Shanxi Datong University, Datong 037003, Shanxi, China;

Corresponding Author

Hua-feng LUO(317306472@qq.com)

Abstract

To improve the electrolyte wettability and thermal resistance of separators used for lithium-ion battery, a novel cellulose acetate (CA)-based separator is facilely prepared by non-solvent induced phase separation (NIPS) wet-process and investigated in lithium-ion batteries. Systematical investigations including morphological characterization, electrolyte wettability and thermal resistance testing were carried out. The results demonstrated that the CA-based separator exhibited well developed three-dimensional porous structures with porosity up to 65%, which is 1.5 times higher than that of PE separator. The CA separator also showed excellent electrolyte uptake (285%) and thermal stability at 150 ^oC for 30 min. Compared with the commercial PE separator, the CA separator exhibited better electrochemical performances, achieving superior discharge C-rate capability and cycling performance.

Graphical Abstract

Keywords

separator, phase inversion method, cellulose acetate, wettability, thermal resistance, electrochemistry performance

DOI Link

https://doi.org/10.13208/j.electrochem.160723

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2017-10-28

Online Available Date

2017-03-22

Revised Date

2017-03-22

Received Date

2016-07-23

Recommended Citation

Hua-feng LUO, Yuan-dong QIAO. Preparation and Characterization of Cellulose Acetate-based Separator for Lithium-ion batteries[J]. Journal of Electrochemistry, 2017 , 23(5): 610-616.
DOI: 10.13208/j.electrochem.160723
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss5/9