One-pot synthesis of hollow NiSe-CoSe nanoparticles with improved performance for hybrid supercapacitors
One-pot synthesis of hollow NiSe-CoSe nanoparticles with improved performance for hybrid supercapacitors
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一锅法合成空心 NiSe-CoSe 纳米粒子，提高混合超级电容器的性能
DOI：
10.1016/j.jpowsour.2016.08.097
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发表时间：
2016-10-15
影响因子：
9.2
通讯作者：
Jiang, Jianjun
中科院分区：
文献类型：
--
作者：
Chen, Haichao;Fan, Meiqiang;Jiang, Jianjun
Hollow NiSe-CoSe samples have been synthesized for the first time via a one-pot solvothermal approach. The strategy is robust enough to synthesize NiSe-CoSe nanoparticles with different NiSe to CoSe ratios but with a similar hollow structure. Co ions in the NiSe-CoSe nanoparticles play decisive role for formation of the hollow structure; otherwise, the nanoparticles become solid for the NiSe sample. When used as the positive electroactive materials for energy storage, the NiSe-CoSe samples show excellent electrochemical activity in alkaline electrolyte. Using the synergistic effect between NiSe and CoSe, the electrochemical performance of NiSe-CoSe can be tuned by varying the NiSe to CoSe ratios. The NiSe-CoSe sample with a NiSe to CoSe ratio of 4:2 shows the best electrochemical performance in terms of superior specific capacity, improved rate capability and excellent cycling stability. In addition, the electrochemical performance of NiSe-CoSe sample with a NiSe to CoSe ratio of 4:2 is also evaluated via assembling hybrid supercapacitors with RGO, and the hybrid supercapacitor delivers both high power and energy densities (41.8 Wh kg(-1) at 750 W kg(-1) and 20.3 Wh kg(-1) at 30 kW kg(-1)). (C) 2016 Elsevier B.V. All rights reserved.
