Pure cellulose lithium-ion battery separator with tunable pore size and improved working stability by cellulose nanofibrils

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

22 Scopus Citations
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Author(s)

  • Jingchao Chai
  • Peng Wang
  • Chao Liu
  • Shuangxi Nie
  • Bin Li
  • Guanglei Cui

Detail(s)

Original languageEnglish
Article number116975
Journal / PublicationCarbohydrate Polymers
Volume251
Online published24 Aug 2020
Publication statusPublished - 1 Jan 2021

Abstract

Separator is a vital component of lithium-ion batteries (LIBs) due to its important roles in the safety and electrochemical performance of the batteries. Herein, we reported a cellulose nanofibrils (CNFs) reinforced pure cellulose paper (CCP) as a LIBs separator fabricated by a facile filtration process. The nanosized CNFs played crucial roles as a tuner to optimize the pore size of the as-prepared CCP, and also as a reinforcer to improve the mechanical strength of the resultant CCP. Results showed that the tensile strength of the CCP with 20 wt.% CNFs was 227 % higher compared to the commercial cellulose separator. In addition, the lithium cobalt oxide/lithium metal battery assembled with CCP separator displayed better cycle performance and working stability (capacity retention ratio of 91 % after 100 cycles) compared to the batteries with cellulose separator (52 %) and polypropylene separator (84 %) owing to the multiple synergies between CCP separator and electrolytes.

Research Area(s)

  • Cellulose nanofibrils, Good cycle performance, High strength, Lithium-ion battery separator, Pure cellulose

Citation Format(s)

Pure cellulose lithium-ion battery separator with tunable pore size and improved working stability by cellulose nanofibrils. / Lv, Dong; Chai, Jingchao; Wang, Peng; Zhu, Lingyu; Liu, Chao; Nie, Shuangxi; Li, Bin; Cui, Guanglei.

In: Carbohydrate Polymers, Vol. 251, 116975, 01.01.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review