期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 805, 期 -, 页码 631-637出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.07.095
关键词
Supercapacitors; Lead sulfide; Fern-like; Hierarchical architectures; Long-term cycling stability
资金
- Outstanding Scientific and Technological Innovation Team in Colleges and Universities of Jiangsu Province
- National Natural Science Foundation of China [51771090, 51402150]
- Scientific Research Foundation of Nanjing Institute of Technology [CKJA201502, JCYJ201606]
- Practice Innovation Program for College Students of Jiangsu Province [201911276001Z]
This work describes a facile one-step method to synthesize PbS hierarchical architectures with excellent supercapacitive performance. The as-prepared PbS sample shows a self-similar fern-like morphology. A unit has four or eight micro-trunks with the size of 10 +/- 1 mu m, which consist of ordered secondary nano-leaves with the thickness of 200 +/- 20 nm and the spacing of about 100 nm. The fractal fern-like PbS sample owns a high specific capacitance of 498 F/g at a discharge current density of 2 A/g, while the value still retains 74% (369 F/g) at a big discharge current density of 20 A/g. The equivalent series resistance of the as-prepared sample is only 1.05 Omega. Moreover, the fractal fern-like PbS sample exhibits a surprising long-term durability which can keep 95.9% capacitance retention over 60,000 charge/discharge cycles at a charge/discharge current density of 5 A/g. The as-prepared PbS sample shows a stable energy density of 11.5 Wh/kg at the power density of 200 W/kg, and still remains 8.2 Wh/kg at 4000 W/kg. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据