Highly nanoporous carbons by single-step organic salt carbonization for high-performance supercapacitors

Highly nanoporous carbons by single-step organic salt carbonization for high-performance supercapacitors
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通过一步有机盐碳化制备高纳米孔碳,用于高性能超级电容器

DOI:
10.1007/s10800-015-0850-z
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发表时间:
2015-05
影响因子:
2.9
通讯作者:
Zhang Jianqiang
Zhang Jianqiang
中科院分区:
工程技术4区
文献类型:
--
作者:
Luo Heming;Yang Yanfei;Sun Yanxia;Chen Dejun;Zhao Xia;Zhang Deyi;Zhang Jianqiang

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本文介绍了在惰性气氛中,草酸钠在无任何活化条件下直接碳化合成高纳米孔炭材料。炭化温度和炭化时间对超级电容器中碳的结构及其电化学性能非常重要。草酸钠衍生的SOC-800-2.5材料具有1456m2g−1的高比表面积,总共74%的孔体积由平均孔径3.7nm的介孔组成,非常适合用作超级电容器的电极。SOC-800-2.5材料在0.7A/−1的恒定充放电电流下可以提供245F/g−1的高比电容。在10A/g−1时,该材料的比容保持在173F/−1。该材料还具有良好的循环稳定性,在使用6 MKOH作为电解液的三电极系统中,5000次循环后的容量保持率超过89.1%。
This paper presents the direct synthesis of highly nanoporous carbon materials via the carbonization of sodium oxalate in inert atmosphere without any activation. The carbonization temperature and time are very important for the carbon structures and their electrochemical performance in supercapacitors. The SOC–800–2.5 material derived from sodium oxalate has a high specific surface area of 1456 m2g−1, and a total of 74 % of the pore volume is composed of mesoporosity with average pore size 3.7 nm, which is ideal for adoption as an electrode for supercapacitors. The SOC–800–2.5 material can also deliver a high specific capacitance of 245 F g−1at a constant charge/discharge current of 0.7 A g−1. This capacitance is maintained at a value of 173 F g−1at 10 A g−1. This material also has good cycle stability with over 89.1 % capacitance retention after 5000 cycles when measured in a three-electrode system using 6 M KOH as electrolyte.
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发表时间: 2004-01-01
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