Influence of annealing process on the electrochemical properties of Ni3S2 electrode for stable supercapacitors
Influence of annealing process on the electrochemical properties of Ni3S2 electrode for stable supercapacitors
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退火工艺对稳定超级电容器Ni3S2电极电化学性能的影响
DOI:
10.1016/j.est.2020.101946
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发表时间:
2020-12
影响因子:
9.4
通讯作者:
马晓光
中科院分区:
文献类型:
--
作者:
张浩楠;刘莹;朱晨;马晓光
Transition metal sulfides have broad applications in supercapacitors for their excellent electrochemical properties. In this work, the nickel sulfide (Ni3S2) nanosheets are prepared by a facile in-situ synthesis process. The annealing process is studied in detail to analyze its effect on the electrochemical performance of Ni3S2electrodes. Results reveal that the annealing temperature is the key factor which influences the morphology, structure, component and mass change of the electrode materials. In three-electrode system, the sample pretreated at 400 °C for 2 h (Ni3S2-400 °C-2 h) exhibits the best capacitive properties with high specific capacitance (0.84 F cm−2at 1.33 A cm−2) and excellent cycling stability (85.90% capacitance retains after 12,000 cycles). The asymmetric device (Ni3S2-400 °C-2 h//AC) displays the maximum specific energy of 22.97 μW h cm−2and the maximum specific power of 1.06×104μW cm−2. This work provides a promising way to prepare the Ni3S2electrodes and systematically analyses their electrochemical properties at different annealing conditions.
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