超级电容器
电容
材料科学
储能
纳米颗粒
制作
比表面积
纳米技术
化学工程
锰
化学
冶金
电极
有机化学
工程类
物理
物理化学
催化作用
功率(物理)
病理
医学
替代医学
量子力学
作者
Zichuan Liu,Linghui Peng,Lingling Shen,Hongbo Qiu,Weiren Fan,Tao Wang,Biao Zhu,Xuchuan Jiang
标识
DOI:10.1002/cnma.202300219
摘要
Abstract Manganese dioxide (MnO 2 ) has been extensively investigated as an electrode material for supercapacitors because of its high theoretical capacitance, great abundance, and low toxicity. To obtain satisfactory capacitance performance, in recent years, many efforts have been dedicated to the fabrication of MnO 2 nanoparticles that offer a larger specific surface area and an escalated chemical activity. Beyond them, the ideal dispersibility of nanoparticles in a liquid medium is also of vital importance when processing those powdery materials into slurry ones for some particular uses, such as editable and ink‐printing supercapacitor devices. In this study, the as‐synthesized ultrafine MnO 2 nanoparticles having excellent dispersibility in water can be prepared via a facile one‐step hydrothermal route, with a uniform size in diameter of 200 nm exhibiting a large specific surface area of ~389.7 m 2 g −1 , and a high specific capacitance of 135.7 F g −1 at 5 mV s −1 .
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