Use of CoNi-ZIF (zeolitic imidazolate framework)-derived bimetal-doped nitrogen-rich porous carbon composite transition metal oxides in lithium–sulfur batteries
Use of CoNi-ZIF (zeolitic imidazolate framework)-derived bimetal-doped nitrogen-rich porous carbon composite transition metal oxides in lithium–sulfur batteries
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DOI：
10.1007/s10854-023-10164-9
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
W. Feng;Yueping Niu;X. Zheng;Wenxiao Su;Jingzhou Chen;Li Zhang
中科院分区：
文献类型：
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作者：
W. Feng;Yueping Niu;X. Zheng;Wenxiao Su;Jingzhou Chen;Li Zhang
Lithium–sulfur batteries have drawn widespread attention due to their excellent energy density and theoretical specific capacity. However, the low conductivity and volumetric expansion effect of the cathode material and the shuttle effect during the reaction process hinder the commercialization of batteries. Porous carbon materials with rich pore structure and heteroatom doping can effectively improve the above defects. Therefore, the bimetallic-doped nitrogen-rich porous carbon composite transition metal CeO2was selected as the cathode material. Therefore, we chose a CoNi-ZIF (zeolitic imidazolate framework)-derived bimetallic-doped nitrogen-rich porous carbon composite with transition metal cerium oxide as the cathode material. CeO2nanoparticles have a strong ability to trap polysulfide, and CoNi-NC can confine sulfur in the ordered pore structure and improve the electrical conductivity of the active material. The experimental results show that CoNi-NC@CeO2-2 has good electrochemical performance with a specific capacity of 1245 mAh g− 1at the first discharge at 0.1 C. It indicates that the composite can inhibit the formation of shuttle effect and upgrade the reaction kinetic performance of the battery.
