Spin Effect to Promote Reaction Kinetics and Overall Performance of Lithium-Sulfur Batteries under External Magnetic Field

Lithium-sulfur batteries (LSBs) are still limited by the shuttle of lithium polysulfides (LiPS) and the slow Li-S reaction. Herein, we demonstrate that when using cobalt sulfide as a catalytic additive, an external magnetic field generated by a permanent magnet can significantly improve the LiPS ads...

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Detalles Bibliográficos
Autores: Zhang, Chao Yue, Zhang, Chaoqi, Sun, Guo Wen, Pan, Jiang Long, Gong, Li, Sun, Geng Zhi, Biendicho, Jordi Jacas, Balcells, Lluis, Fan, Xiao Long, Morante, Joan Ramón, Zhou, Jin Yuan, Cabot, Andreu
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/283759
Acceso en línea:http://hdl.handle.net/10261/283759
https://api.elsevier.com/content/abstract/scopus_id/85141162541
Access Level:acceso abierto
Palabra clave:Cobalt Sulfides
Electrospinning
Lithium Polysulfide
Lithium-Sulfur Battery
Spin Polarization
Descripción
Sumario:Lithium-sulfur batteries (LSBs) are still limited by the shuttle of lithium polysulfides (LiPS) and the slow Li-S reaction. Herein, we demonstrate that when using cobalt sulfide as a catalytic additive, an external magnetic field generated by a permanent magnet can significantly improve the LiPS adsorption ability and the Li-S reaction kinetics. More specifically, the results show both experimentally and theoretically how an electron spin polarization of Co ions reduces electron repulsion and enhances the degree of orbital hybridization, thus resulting in LSBs with unprecedented performance and stability. Under an external magnetic field, LSBs with 0.0084 % per cycle decay rate at 2 C during 8150 cycles are produced. Overall, this work not only demonstrates an effective strategy to promote LiPS adsorption and electrochemical conversion in LSBs at no additional energy cost but also enriches the application of the spin effect in the electrocatalysis fields.

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