Communication-Cross-Linked Anionic Polymer Coating Prepared by UV and Thermal Curing for Long-Life LithiumSulfur Battery

An anionic polymer coating produced by ultraviolet curing and thermosetting to suppress polysulfide dissolution of the sulfur cathode for lithium-sulfur batteries was investigated. An sulfur/Ketjenblack cathode with a high sulfur loading of 10 mg cm(-2) was prepared using a three-dimensional foam current collector. From the current rate and cycle characteristics, the cross-linked polymer coating suppressed the polysulfide dissolution, and the discharge capacities were 1031 and 414 mAh g(-1) -sulfur at 0.1 and 1.0C, respectively. In a long-term cycle test of 300 cycles, a capacity retention rate was 41%. An average coulombic efficiency was 91% throughout the cycles. (C) 2021 The Electrochemical Society (ECS). Published on behalf of ECS by IOP Publishing Limited.

Automated summary

An anionic polymer coating produced by ultraviolet curing and thermosetting was investigated as a method to suppress polysulfide dissolution in lithium-sulfur batteries. The polymer coating was effective in suppressing polysulfide dissolution, resulting in good discharge capacities and capacity retention rates in cycle testing.