Cellulose/Polysulfonamide Composite Membrane as a High Performance Lithium-Ion Battery Separator
Citations Over TimeTop 10% of 2013 papers
Abstract
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 °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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