Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech) , 30 South Puzhu Road, Nanjing 211816, China.
ACS Appl Mater Interfaces. 2015 Nov 18;7(45):25396-401. doi: 10.1021/acsami.5b07941. Epub 2015 Nov 3.
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).
通过包括两步回流反应的简单牺牲模板法，可可控合成了均匀的 NiS2 中空纳米棱柱体。通过廉价的镍络合物模板，很容易对中空 NiS2 棱柱体的形态进行剪裁。具有独特的中空结构、高效的电子和离子传输途径以及单晶结构，NiS2 中空棱柱体电极在 LiOH 电解质中表现出优异的赝电容性能。在电流密度为 5 A g(-1)时，其比电容可达 1725 F g(-1)，甚至在电流密度为 40 A g(-1)时，比电容可达 1193 F g(-1)。此外，该材料还表现出惊人的循环稳定性，即在 20 A g(-1)的电流密度下，经过 10000 次充放电循环后，比电容可从 1367 F g(-1)增加到 1680 F g(-1)。
