A three-dimensional crosslinked chitosan sulfate network binder for high-performance Li–S batteries
Poor cycling performance caused by the shuttle effect of polysulfides is the main obstacle in the development of advanced lithium–sulfur (Li–S) batteries. Functional polymer binders with polar groups can effectively adsorb polysulfides chemically, thereby suppressing the shuttle effect. Herein, a robust three-dimensional crosslinked polymer network, which demonstrates excellent mechanical property and strong affinity for polysulfides, is prepared by the aldimine condensation and coordination reactions. The crosslinked chitosan sulfate network (CCSN) significantly enhances the cycling performance and rate capability of the sulfur cathode. The CCSN-based sulfur cathode exhibits a high initial discharge capacity of 824 mAh g with only 0.082% average capacity loss per cycle at 1 C. At a high rate of 4 C, the cathode exhibits a high capacity retention of 84.8% after 300 cycles. Moreover, the CCSN-based sulfur cathode exhibits an excellent cycling performance at a high sulfur loading of 2.5 mg cm, which indicates the excellent mechanical strength and binding performance of the CCSN binder for high-energy density Li–S batteries. This study demonstrates a viable approach for developing high-performance Li–S batteries for practical application.
|ESI Research Field|
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.Research Institute of Materials Science,South China University of Technology,Guangzhou,510640,China
2.Department of Materials Science & Engineering,Academy for Advanced Interdisciplinary Studies,Guangdong Provincial Key Laboratory of Energy Materials for Electric Power,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
3.Department of Chemical and Materials Engineering,University of Alberta,Edmonton,T6G 1H9,Canada
|Corresponding Author Affilication||Department of Materials Science and Engineering|
Feng，Jianwen,Yi，Huan,Lei，Zhiwen,等. A three-dimensional crosslinked chitosan sulfate network binder for high-performance Li–S batteries[J]. Journal of Energy Chemistry,2021,56:171-178.
Feng，Jianwen.,Yi，Huan.,Lei，Zhiwen.,Wang，Jun.,Zeng，Hongbo.,...&Wang，Chaoyang.(2021).A three-dimensional crosslinked chitosan sulfate network binder for high-performance Li–S batteries.Journal of Energy Chemistry,56,171-178.
Feng，Jianwen,et al."A three-dimensional crosslinked chitosan sulfate network binder for high-performance Li–S batteries".Journal of Energy Chemistry 56(2021):171-178.
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