Cu-NiCoP微球的制备及其超级电容性能

doi:10.19799/j.cnki.2095-4239.2022.0555

摘要/Abstract

摘要：

过渡金属磷化物(TMPs)由于良好的导电性和高比容量，是有前景的超级电容器电极材料。本研究通过溶剂热和磷化反应制备了Cu-NiCoP微球，探究了Cu掺杂量对NiCoP的电化学性能影响。研究表明Cu掺杂量为5%时，材料的电化学性能相对最好，比电容达到1500 F/g(1 A/g的电流密度下)，远高于未掺Cu的NiCoP微球(1025 F/g)。将5%Cu-NiCoP和活性炭分别作为正极和负极，组装成非对称超级电容器(ASC)。组装的ASC器件具有良好的循环寿命稳定性，在2 A/g电流密度下循环9200次后，容量保持率为76%。该ASC器件具有较好的倍率性能，在功率密度为750 W/kg时，具有84 Wh/kg的高能量密度。因此，本工作证明了Cu的掺杂可以有效改善NiCoP电极的电化学性能，也探索了Cu-NiCoP作为正极材料在超级电容器储能中的潜力。

关键词: 磷化物, 微球, 非对称超级电容器, 电化学性能

Abstract:

Transition metal phosphides (TMPs) are promising supercapacitor electrode materials due to their high electrical conductivity and large specific capacitance. In this study, the Cu-NiCoP microspheres were prepared from solvothermal and phosphating reactions, and the effect of Cu doping on the electrochemical properties of NiCoP was explored. The results of this study show that the electrochemical properties of the material are the best when the amount of Cu doping is 5% with the associated specific capacitance reaching 1500 F/g(at a current density of 1 A/g), which is much higher than that of the undocumented NiCoP microspheres (the specific capacitance is 1025 F/g at a current density of 1 A/g). The 5% Cu-NiCoP and activated carbon are assembled into asymmetric supercapacitors (ASC) with positive and negative electrodes, respectively. The assembled ASC devices demonstrate supreme cycle life stability with a capacity retention of 76% after 9200 cycles at a current density of 2 A/g. The ASC devices also show desirable multiplier performance, with a high energy density of 84 Wh/kg at a power density of 750 W/kg. Therefore, this work suggests that Cu doping can effectively improve the electrochemical properties of NiCoP electrodes, and Cu-NiCoP has the potential to be used as cathode materials in supercapacitor energy storage.

Key words: phosphide, microsphere, asymmetric supercapacitor, electrochemical performance

中图分类号:

TB 34

许珂, 陈珏锡, 孟瑶, 袁治冶, 汪形艳. Cu-NiCoP微球的制备及其超级电容性能[J]. 储能科学与技术, 2023, 12(2): 357-365.

Ke XU, Juexi CHEN, Yao MENG, Zhiye YUAN, Xingyan WANG. Preparation of Cu-NiCoP microspheres and their supercapacitive performance[J]. Energy Storage Science and Technology, 2023, 12(2): 357-365.

图/表 4

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