Nanosized graphitic carbon with balanced micro/mesoporosity for robust supercapacitor with superior volumetric capacitance and cyclic performance
Nanosized graphitic carbon with balanced micro/mesoporosity for robust supercapacitor with superior volumetric capacitance and cyclic performance
复制标题
具有平衡微/介孔性的纳米级石墨碳，可用于具有卓越体积电容和循环性能的坚固超级电容器
DOI：
10.1016/j.electacta.2018.03.172
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发表时间：
2018
影响因子：
6.6
通讯作者：
Li Xupeng
中科院分区：
文献类型：
--
作者：
Xue Chunfeng;Yang Fujuan;Wang Enyang;Feng Lin;Du Xiao;Hao Xiaogang;Li Xupeng
通过直接碳化Ni(II)阳离子交换树脂，在80 0 °C的中温下制备了具有平衡和连接的微孔/中孔的纳米石墨炭。均匀分散的纳米Ni粒子很好地充当了低成本树脂“原位”石墨化的催化剂和构型微孔和中孔形成的致孔剂。GC-800具有1：2的平衡微孔/介孔性能，在1.0 μM H_2SO_4电解液中，在0.50A/g的电流密度下，其比容量为66.0 F/cm2，体积比容量为552.6 F/cm~3。在双电极系统中，当功率密度为125.0 W/kg时，其能量密度也达到了7.43 Wh/kg。其优异的循环性能不仅体现在采用刚性浮法的400 h后的容量保持率(95%)，而且在双电极和三电极系统中，在5.0A/g电流密度下进行了10000次GCD测试。
A nanosized graphitic carbon with balanced and connected micro/mesopores is prepared by directly carbonizing Ni(II) cation-exchanged resin at a moderate temperature of 800 °C. The homogeneously dispersed Ni nanoparticle well acts as the catalyst for “in-situ” graphitization of the low-cost resin and the porogen for the formation of configured micro- and mesopores. The graphitic carbon GC-800 exhibits a balanced micro/mesoporosity at the ratio of 1:2, which delivers an excellent specific capacitance 66.0 μF/cm2and a high volumetric capacitance of 552.6 F/cm3at the current density of 0.50 A/g in the electrolyte of 1.0 M H2SO4. In the dual-electrode system, it also displays high energy density of 7.43 Wh/kg at a power density of 125.0 W/kg. Its superior cyclic performance is not only confirmed by the capacitance retention (95%) after 400 h using the rigid floating technique but also 10000 cycles of GCD measurement at the current density of 5.0 A/g in both double- and triple-electrode systems.