Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 2, Issue 2, Pages 194-199Publisher
AMER CHEMICAL SOC
DOI: 10.1021/sc400370h
Keywords
Cellulose; Polysulfonamide; Composite membrane; Papermaking process; Lithium-ion battery separator
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Funding
- Instrument Developing Project of the Chinese Academy of Sciences [YZ201137]
- National High Technology Research and Development Program of China (863 program) [2013AA050905]
- Natural Science Foundation of China (NSFC) [21344003]
- Qingdao Key Lab of Solar Energy Utilization & Energy Storage Technology
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Battery separators have drawn considerable attention due to their vital roles for the safety and electrochemical performance of lithium-ion batteries. In this paper, the cellulose/polysulfonamide composite membrane was successfully fabricated from a mixture of microfibrillar cellulose and polysulfonamide via a facile papermaking process. And its potential application was explored as a high performance lithium-ion battery separator by characterizing their electrolyte wettability, heat tolerance, and electrochemical properties. Lithium cobalt oxide/graphite cells using the separator displayed better capacity retention ratios of 85% after 100 cycles and superior rate capability compared with those of a commercial polypropylene separator. Furthermore, the lithium iron phosphate/lithium half cell using cellulose/ polysulfonamide separator exhibited stable charge discharge capability even at 120 degrees C. It was demonstrated that the composite separator possessed an enhanced thermal dimensional stability. This research provides a promising new strategy for large-scale fabrication of high performance lithium-ion battery membranes.
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