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Microwave-assisted anchoring of flowerlike Co(OH)(2) nanosheets on activated carbon to prepare hybrid electrodes for high-rate electrochemical capacitors

机译:花状Co(OH)(2)纳米片的微波辅助锚固在活性炭上,以制备用于高速电化学电容器的混合电极

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Flower-like alpha-Co(OH)(2) nanosheets are in-situ grown on the surface of activated carbon supports for supercapacitors via a facile and cost-effective microwave-assisted method. The existence of carbon supports facilitates the dispersion of pseudocapacitive Co(OH)(2) nanosheets and also provides appropriate pathways for charges while charging and discharging. The obtained hybrid architectures can provide a high specific capacitance up to 345 F g(-1) at 0.1 A g(-1), and still retain 284 F g(-1) at a current density as high as 5 A g(-1). In addition, benefited from the stable hybrid nanostructures, an excellent electrochemical stability is achieved with an only 16% capacitance degradation after 15,000 charge-discharge cycles at a high current density of 5 A g(-1). The impressive electrochemical performance is ascribed to the synergistic effect of porous carbon substrates and pseudocapacitive Co(OH)(2) nanosheets. (C) 2015 Elsevier Ltd. All rights reserved.
机译:花状的α-Co(OH)(2)纳米片通过一种简便且经济高效的微波辅助方法原位生长在用于超级电容器的活性炭载体上。碳载体的存在有利于伪电容Co(OH)(2)纳米片的分散,并且还提供了在充电和放电时进行充电的适当途径。所获得的混合架构可在0.1 A g(-1)时提供高达345 F g(-1)的高比电容,并在高达5 A g(-)的电流密度下仍保持284 F g(-1)。 1)。此外,得益于稳定的杂化纳米结构,在5 A g(-1)的高电流密度下进行15,000次充放电循环后,仅16%的电容衰减即可实现出色的电化学稳定性。令人印象深刻的电化学性能归因于多孔碳基底和假电容性Co(OH)(2)纳米片的协同效应。 (C)2015 Elsevier Ltd.保留所有权利。

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