Template Synthesis of Shape-Tailorable NiS2 Hollow Prisms as High-Performance Supercapacitor Materials
Template Synthesis of Shape-Tailorable NiS2 Hollow Prisms as High-Performance Supercapacitor Materials
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DOI：
10.1021/acsami.5b07941
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发表时间：
2015-11-18
影响因子：
9.5
通讯作者：
Dong, Xiaochen
中科院分区：
文献类型：
--
作者：
Dai, Ziyang;Zang, Xiaoxian;Dong, Xiaochen
通过包括两步回流反应的面部牺牲模板方法可控合成了均匀的 NiS2 空心纳米棱柱。空心 NiS2 棱镜的形貌可以通过低成本的镍络合物模板轻松定制。 NiS2空心棱柱电极具有独特的空心结构、高效的电子和离子传输通道以及单晶结构，在LiOH电解质中表现出优异的赝电容性能。它在5 A g(-1)电流密度下可提供1725 F g(-1)的比电容，甚至在40 A g(-1)电流密度下可提供1193 F g(-1)的比电容。此外，该材料还表现出惊人的循环稳定性，即在20 A g(-1)电流密度下充放电10000次循环后，比电容可以从1367 F g(-1)增加到1680 F g(-1)。
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(-1) at a current density of 5 A g(-1) and 1193 F g(-1) even at a current density of 40 A g(-1). Furthermore, the materials also present an amazing cycling stability, that is, the specific capacitance can increase from 1367 F g(-1) to 1680 F g(-1) after 10,000 cycles of charge-discharge at the current density of 20 A g(-1).