Template Synthesis of Shape-Tailorable NiS2 Hollow Prisms as High-Performance Supercapacitor Materials

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• 作者：Ziyang Dai ; Xiaoxian Zang ; Jun Yang ; Chencheng Sun ; Weili Si ; Wei Huang ; Xiaochen Dong
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 18, 2015
• 年：2015
• 卷：7
• 期：45
• 页码：25396-25401
• 全文大小：476K
• ISSN：1944-8252

文摘

Uniform NiS₂ hollow nanoprisms have been controllably synthesized by a facial sacrificial template method including two-step refluxed reactions. The morphology of the hollow NiS₂ prisms can be easily tailored by the low cost nickel complex template. With unique hollow structure, efficient electron, and ion transport pathway as well as single crystal structure, the NiS₂ hollow prisms electrode exhibits excellent pseudocapacitive performance in LiOH electrolyte. It can deliver a specific capacitance of 1725 F g^鈥? at a current density of 5 A g^鈥? and 1193 F g^鈥? even at a current density of 40 A g^鈥?. Furthermore, the materials also present an amazing cycling stability, that is, the specific capacitance can increase from 1367 F g^鈥? to 1680 F g^鈥? after 10鈥?00 cycles of charge鈥揹ischarge at the current density of 20 A g^鈥?.