CoNi-Based Bimetal-Organic Framework Derived Carbon Composites Multifunctionally Modified Separators for Lithium-Sulfur Batteries

Authors

Yan-Jie Wang, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Hong-Yu Cheng, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Ji-Yue Hou, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Wen-Hao Yang, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Rong-Wei Huang, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Zhi-Cong Ni, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Zi-Yi Zhu, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Ying Wang, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;College of Intelligent Manufacture, PanZhihua University, Panzhihua 617000, China;
Ke-Yi Wei, Yunnan ZhongYan Industry Co., Ltd. Technology Center, Kunming 650231;
Yi-Yong Zhang, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
Xue Li, National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;Follow

Document Type

Article

Corresponding Author(s)

Yi-Yong Zhang;
Xue Li(438616074@qq.com)

Abstract

The commercial application of lithium-sulfur batteries (LSB) is still limited by the irreversible capacity fading caused by the shuttle of polysulfides (LIPS). To address this issue, a bimetal-organic framework (MOF)-derived carbon (Ni, Co)/C was prepared to modify the separator. The multifunctional modified separator effectively captures polysulfides, ensuring the stability and reversibility of sulfur fixation, while providing catalytic activity and improving ionic conductivity. The cobalt metal has a larger coordination number, more pore structure distribution, larger specific surface area, more surface C=O, and smaller particle size to achieve a large and rapid chemical sulfur fixation. The high conductivity provided by nickel, the catalytic activity and the ability to block LIPS shuttling enabled the reversibility of sulfur inhibition. The synergistic effect of cobalt-nickel bimetals significantly improves the cycling stability and rate capability of LSB. At a current density of 1 C, the capacity of the (Ni, Co)/C modified separator battery can reach 1035.6 mAh·g-1 in the first cycle, and the capacity remains at 662.2 mAh·g-1 after 500 cycles, the capacity retention rate was 63.9%.

Keywords

Bimetal-organic framework derived carbon composites, Modified separator, Lithium-sulfur battery, Catalytic activity, Shuttle effect

Online Date

10-31-2022

2217002 -SI.pdf (1726 kB)

Link to Fulltext

https://jelectrochem.xmu.edu.cn/journal/vol29/iss3/3

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