Double-shelled ZnS@ CoS2 nanocages with heterojunctions for high performance cathodes in lithium− sulfur batteries

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	Double-shelled ZnS@ CoS2 nanocages with heterojunctions for high performance cathodes in lithium− sulfur batteries
	Ji Zhou 1,2; Xin Chen 2; Wenbing Gong 3; Xiaodong Meng 1; Chao Chen 2; Xueqin Zhou 2; Manyun Wang 2; HUI KWUN NAM4 ; Jianxin Geng 1
	2024-01
Source Publication	Journal of Energy Storage
Volume	75 Pages:109505
Abstract	The intelligent design of electrocatalytic sulfur host materials is an essential step to achieving high-performance lithium−sulfur (Lisingle bondS) batteries. Herein, we report double-shelled ZnS@CoS2 nanocages as sulfur hosts to electrocatalytically enhance sulfur cathode kinetics and suppress the shuttle effect of polysulfides. Combining theoretical calculations and experimental tests, we reveal that the built-in electric field formed at the ZnS@CoS2 heterojunction is uniquely suited to promoting sulfur cathode electrochemistry; the double-shelled ZnS@CoS2 nanocages facilitate Li+ transport while at the same time enabling the immobilization and rapid electrocatalytic conversion of key polysulfides. Consequently, Lisingle bondS cells prepared from ZnS@CoS2 as sulfur host exhibit a high specific capacity (e.g., 1443 mA h g−1 at the current rate of 0.1 C) and an impressive cycling stability (e.g., an initial specific capacity of 801 mA h g−1 achieved at 2 C and 507 mA h g−1 retained after 650 cycles). Our new concept of designing a heterojunction to promote sulfur cathodic reactions can be potentially extended to other contemporary energy-storage systems.
Document Type	Journal article
Collection	INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author	Jianxin Geng
Affiliation	1.State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, No. 399 BinShuiXi Road, XiQing District, Tianjin 300387, Chi 2.State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Technology, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing 100029, China 3.School of Physics and Energy, Xuzhou University of Technology, Xuzhou 221018, China 4.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa 999078, Macau SAR, China
Recommended Citation GB/T 7714	Ji Zhou,Xin Chen,Wenbing Gong,et al. Double-shelled ZnS@ CoS2 nanocages with heterojunctions for high performance cathodes in lithium− sulfur batteries[J]. Journal of Energy Storage, 2024, 75, 109505.
APA	Ji Zhou., Xin Chen., Wenbing Gong., Xiaodong Meng., Chao Chen., Xueqin Zhou., Manyun Wang., HUI KWUN NAM., & Jianxin Geng (2024). Double-shelled ZnS@ CoS2 nanocages with heterojunctions for high performance cathodes in lithium− sulfur batteries. Journal of Energy Storage, 75, 109505.
MLA	Ji Zhou,et al."Double-shelled ZnS@ CoS2 nanocages with heterojunctions for high performance cathodes in lithium− sulfur batteries".Journal of Energy Storage 75(2024):109505.

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