Cobalt hydroxide [Co(OH)2] loaded carbon fiber flexible electrode for high performance supercapacitor
Cobalt hydroxide [Co(OH)2] loaded carbon fiber flexible electrode for high performance supercapacitor
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DOI：
10.1039/c5ra11366k
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Abudula, Abuliti
中科院分区：
文献类型：
--
作者：
Jagadale, Ajay D.;Guan, Guoqing;Abudula, Abuliti
氢氧化钴纳米片均匀地负载在柔性碳纤维（CF）纸上，并为集电器提供良好的电连接性，以用作超级电容器。独特的多孔纳米结构在电极中提供低离子扩散和电荷转移电阻。研究了负载量对电化学性能的影响。当电流密度为1 mA·cm ~（-2）时，电极的最大比容量为386.5F·g ~（-1）。同样，即使在10 mA cm（-2）的较高电流密度下，相同的电极也提供了分别为133.5W·h·kg（-1）和1769 W·kg（-1）的能量和功率密度的良好倍率性能。该电极在2000次循环中显示出92%的循环稳定性。这种柔性、轻质的电极可以有效地用于柔性超级电容器的制造，特别是用于可穿戴电子产品。
Cobalt hydroxide nanoflakes are uniformly loaded on flexible carbon fiber (CF) paper, and provide good electrical connectivity to the current collector for use as supercapacitors. The unique porous nanostructure offers low ion diffusion and charge transfer resistance in the electrode. The effect of loading mass on electrochemical properties is investigated. The electrode with a mass loading of 2.5 mg cm(-2) shows the maximum specific capacitance of 386.5 F g(-1) at a current density of 1 mA cm(-2). Also the same electrode provides a good rate capability with energy and power densities of 133.5 W h kg(-1) and 1769 W kg(-1), respectively even at a higher current density of 10 mA cm(-2). The electrode reveals a cyclic stability of 92% over 2000 cycles. This kind of flexible, lightweight electrode could be effectively utilized for flexible supercapacitor fabrication, especially for wearable electronics.