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Unraveling the reaction reversibility and structure stability of nickel sulfide anodes for lithium ion batteries

Journal of Energy Chemistry 2023年第5期80卷 392-401,I0010页

作者： Yu Huang Chunyuan Liang Yueling Cai Yi Zhou Bingkun Guo Jipeng Cheng Heguang Liu Peng Wang Qianqian Li Anmin Nie Hongtao Wang Jinsong Wu Tongyi Zhang Materials Genome Institute Shanghai UniversityShanghai 200444China Center for X-mechanics Zhejiang UniversityHangzhou 310027ZhejiangChina School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina School of Materials Science and Engineering Xi'an University of TechnologyXi'an 048ShaanxChin Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200444China Center for High Pressure Science State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004HebeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of TechnologyWuhan 430070HubeiChina

The electrochemical performance of lithium-ion batteries,*** capacity and cyclability,is primarily determined by chemical reversibility and structural stability of the electrodes in *** we have investigated the fundamental reaction behaviors of nickel sulfide(NixSy)as lithium-ion battery anodes by in-situ *** find that Ni_(3)S_(2)is the electrochemically stable phase,which appears in the first cycle of the *** the second cycle,conversion between Ni_(3)S_(2)and Li_(2)S/Ni is the dominant electrochemical *** lithiation,the NixSynanoparticles evolve into a mixture of Ni nanocrystals embedded in Li_(2)S matrix,which form a porous structure upon full lithiation,and with the recrystallization of the Ni_(3)S_(2)phase in delithiation,a compact and interconnected network is *** stability in cycles is susceptible to particle size and substrate *** substrate can certainly improve the tolerance for size-dependent pulverization of *** NixSynanoparticle exceeds the critical size value,the morphology of the particle is no longer well maintained even under the constraints of the carbon *** work deepens the understanding of electrochemical reaction behavior of conversiontype materials and helps to rational design of high-energy density battery anodes.

关键词： Nickel sulfide anodes reaction reversility Structure rebuilding In-situ TEM Lithium-ion battery

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