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Updated: Dec 2, 2025
Construction and Testing of Coin Cells of Lithium Ion Batteries
Published on: August 2, 2012
Pure cellulose lithium-ion battery separator with tunable pore size and improved working stability by cellulose
Dong Lv1, Jingchao Chai2, Peng Wang3
1CAS Key Laboratory of Biofuels, Qingdao Industrial Energy Storage Technology Institute, Dalian National Laboratory for Clean Energy, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong, 266101, PR China; Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, 999077, PR China.
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.
