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Preparation of NiCo2S4/carbon hollow sphere for long cycle lithium sulfur batteries

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Abstract

Uniformly distributed NiCo2S4 nanoparticles on hollow carbon spheres were prepared by carbonisation and in-situ vulcanisation methods as a positive electrode host for lithium–sulphur batteries. Among them, carbon hollow spheres can provide a huge internal cavity, which prevents volume expansion during the charge and discharge process. At the same time, the physically limit the dissolution of polysulfides in the electrolyte and can also provide high conductivity. The NiCo2S4 nanoparticles on the surface can establish a specific polar environment for charge and discharge and can interact with polysulfides to mitigate the loss of active materials through chemical adsorption. Under the synergistic effect of NiCo2S4 and carbon hollow spheres, the electrode with a special structure of NiCo2S4/carbon hollow spheres as sulfur host exhibits excellent long cycle performance. At a current density of 335 mA g−1, it still has a high discharge specific capacity of 526 mAh g−1 after 500 cycles.

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Funding

This work was supported by the National Natural Science Foundation of China (52064035), the Key Research and Development Program of Gansu Province (22YF7GA157), and the Natural Science Foundation of Zhejiang Province (LGG22E020003).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China

    Xi Lu, Yanshuang Meng, Xin Wang, Mingjun Xiao, Yishan Xu & Fuliang Zhu

  2. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou, 730050, China

    Yanshuang Meng, Mingjun Xiao & Fuliang Zhu

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  1. Xi Lu
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  2. Yanshuang Meng
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Contributions

FZ and YM: guided all the experimental design, and led the manuscript preparation and revision work. XL: did most of the experiments, data analysis, and prepared the draft manuscript. YX and XW: did some tests. MX: conducted some tests and revised draft manuscript. All of the authors have given approval to the final version of the manuscript.

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Correspondence to Mingjun Xiao or Fuliang Zhu.

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Lu, X., Meng, Y., Wang, X. et al. Preparation of NiCo2S4/carbon hollow sphere for long cycle lithium sulfur batteries. J Mater Sci: Mater Electron 35, 83 (2024). https://doi.org/10.1007/s10854-023-11890-w

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