Facile synthesis of high electrical conductive CoP via solid-state synthetic routes for supercapacitors
Facile synthesis of high electrical conductive CoP via solid-state synthetic routes for supercapacitors
复制标题
通过超级电容器的固态合成路线轻松合成高导电性 CoP
DOI：
10.1016/j.jechem.2016.10.001
复制
发表时间：
2017-01-01
影响因子：
13.1
通讯作者：
Kang, Long
中科院分区：
文献类型：
--
作者：
Hu, Yumei;Liu, Maocheng;Kang, Long
采用机械合金化法制备Co-P前驱体，并通过退火控制合成CoP相。研究了最佳的球磨条件和退火温度。CoP具有比石墨和钴氧化物更高的电导率，由于其高电导率而显示出优异的赝电容特性，这可以导致在高倍率充放电中具有快速的电子转移。所获得的CoP电极在8月1日达到447.5图的高比电容，并显示出优异的倍率性能以及良好的循环稳定性。此外，还组装了以CoP为正极、活性炭（AC）为负极的非对称超级电容器（ASC（电流密度从8月1日增加到8月12日，电容量保持60%），循环稳定性好（在5000次循环后保持初始电容的96.7%），以及在350.8W/kg的功率密度下19 Wh/kg的上级比能量。结果表明，CoP电极材料具有开发高性能电化学储能器件的巨大潜力。(C)2016年科学出版社和中国科学院大连化学物理研究所。由爱思唯尔公司和科学出版社出版。All rights reserved.
Co-P precursor was prepared by a mechanical alloying method and then is controlled to synthesis of CoP phase through an annealing method. The optimal conditions of ball milling and annealing temperature are investigated. The CoP exhibits higher electrical conductivity than graphite and cobalt oxide, showing excellent pseudocapacitive properties due its high electrical conductivity which can result in a fast electron transfer in high rate charge-discharge possess. The as-obtained CoP electrode achieves a high specific capacitance of 447.5 Fig at 1 Aug, and displays an excellent rate capability as well as good cycling stability. Besides, the asymmetric supercapacitor (ASC) based on the CoP as the positive electrode and activated carbon (AC) as the negative electrode was assembled and displayed a high rate capability (60% of the capacitance is retained when the current density increased from 1 Aug to 12 Aug), excellent cycling stability (96.7% of the initial capacitance is retained after 5000 cycles), and a superior specific energy of 19 Wh/kg at a power density of 350.8 W/kg. The results, suggest that the CoP electrode materials have a great potential for developing high-performance electrochemical energy storage devices. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.