Li Zhongchun, Yu Xuewei, Gu Aijun, Tang Huang, Wang Liangbiao, Lou Zhengsong
Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering, School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, People's Republic of China.
Nanotechnology. 2017 Feb 10;28(6):065406. doi: 10.1088/1361-6528/28/6/065406. Epub 2017 Jan 10.
A facile anion exchange strategy was applied to the synthesis of porous NiS hexagonal nanoplates (NiS HNPs) as an electrode material for supercapacitors. It was found that NaS concentration is a key factor to achieve porous NiS hexagonal nanoplates with well-defined architecture. Porous NiS hexagonal nanoplates exhibited a specific capacitance of 1897 F g at a current density of 1 A g. NiS HNPs//activated carbon (AC) asymmetric supercapacitor (ASC) shows a long cycle lifespan (about 100% capacity retention after 4000 cycles at a current density of 3 A g) with a maximum energy density of 11.6 Wh kg at a large loading mass of about 30 mg. Impressively, two NiS HNPs//AC ASCs in series could light up a red LED for about 30 min. The remarkable electrochemical performance of NiS HNPs is ascribed to their unique hierarchical porous architectures. The anion exchange method is a facile and versatile strategy for the synthesis of metal sulfides with high performance for energy storage.
一种简便的阴离子交换策略被应用于合成多孔硫化镍六角纳米片（NiS HNPs），作为超级电容器的电极材料。研究发现，NaS浓度是获得具有明确结构的多孔硫化镍六角纳米片的关键因素。多孔硫化镍六角纳米片在1 A g的电流密度下表现出1897 F g的比电容。NiS HNPs//活性炭（AC）非对称超级电容器（ASC）显示出长循环寿命（在3 A g的电流密度下4000次循环后容量保持率约为100%），在约30 mg的大负载质量下最大能量密度为11.6 Wh kg。令人印象深刻的是，两个串联的NiS HNPs//AC ASC可以点亮一个红色发光二极管约30分钟。NiS HNPs卓越的电化学性能归因于其独特的分级多孔结构。阴离子交换法是一种简便且通用的策略，用于合成具有高性能储能的金属硫化物。
