Sulfur Powder as a Reducing Agent to Synthesize the Ni@Ni(OH)(2) Flower-Like Material for Electrochemical Capacitors
Sulfur Powder as a Reducing Agent to Synthesize the Ni@Ni(OH)(2) Flower-Like Material for Electrochemical Capacitors
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硫粉作为还原剂合成电化学电容器用Ni@Ni(OH)(2)花状材料
DOI：
10.1166/jnn.2018.15549
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发表时间：
2018
影响因子：
--
通讯作者：
Dong Qingsong
中科院分区：
文献类型：
--
作者：
Zou Yizhen;Wang Yuqing;Fang Zhiqiang;Wu Doudou;Yang Shishuai;Hao Zhaomin;Lang Junwei;Dong Qingsong
本文以硫粉为还原剂，以Ni2+为唯一镍源，采用一锅法合成了Ni@Ni(OH)2花状材料。用X射线衍射仪、扫描电子显微镜、透射电子显微镜和X射线光电子能谱对所制备的Ni@Ni(OH)2材料进行了表征。分别用循环伏安法、计时电位法和交流阻抗谱进行了电化学研究。所制备的Ni@Ni(OH)2材料在电流密度为1 A g−1的条件下，在2 M的KOH溶液中的比电容可达785F g−1，在电化学电容器电极材料中具有潜在的应用前景。
In this paper, a Ni@Ni(OH)2 flower-like material was got through an unusual one-pot synthesis that used sulfur powder as a reducing agent and Ni2+ as the only nickel source. The as-prepared Ni@Ni(OH)2 material was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). Electrochemical studies were carried out using cyclic voltammetry, chronopotentiometry technology, and alternating current impedance spectroscopy, respectively. A maximum specific capacitance of 785 F g−1 at the current density of 1 A g−1 could be achieved in 2 M aqueous KOH for the as-prepared Ni@Ni(OH)2 material, suggesting its potential application in the electrode material for electrochemical capacitors.