School of Science, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
Nanotechnology. 2019 Jun 7;30(23):235402. doi: 10.1088/1361-6528/ab0605. Epub 2019 Feb 11.
In this work, NiCoS nanoparticles for supercapacitors are successfully synthesized with a top-down strategy, using a novel dealloying method with an ion exchange reaction. The surface morphology and x-ray diffraction investigations demonstrated that NiCoS nanoparticles are interconnected by ligaments of the synthesized sample. The dealloyed NiCoS shows an enhanced electrochemical performance of about 1132.5 F g at 0.5 A g; kinetic analysis implies a surface-controlled contribution from NiCoS (53.86% capacitive contributions). Notably, the NiCoS//AC (active carbon) device displays a comparatively high energy density (22.83 Wh kg), maximum power density (1327.1 W kg) and superior cycling performance (capacitance retention of 108% after 30 000 cycles).
在这项工作中，使用一种具有离子交换反应的新颖的脱合金方法，成功地从上至下策略合成了用于超级电容器的 NiCoS 纳米粒子。表面形态和 X 射线衍射研究表明，NiCoS 纳米粒子通过合成样品的链节相互连接。脱合金的 NiCoS 在 0.5 A g 时表现出约 1132.5 F g 的增强的电化学性能；动力学分析表明 NiCoS（53.86%的电容贡献）的表面控制贡献。值得注意的是，NiCoS//AC（活性炭）器件显示出较高的能量密度（22.83 Wh kg）、最大功率密度（1327.1 W kg）和出色的循环性能（30000 次循环后电容保持率为 108%）。
