Highly conjugated graphitic 3D carbon frameworks for supercapacitors with long cycling stability
Highly conjugated graphitic 3D carbon frameworks for supercapacitors with long cycling stability
复制标题
用于具有长循环稳定性的超级电容器的高度共轭石墨3D碳框架
DOI：
10.1016/j.carbon.2016.08.081
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发表时间：
2016-11-01
期刊：
影响因子：
10.9
通讯作者：
Xin, John H.
中科院分区：
文献类型：
--
作者：
He, Liang;Zhang, Yabin;Xin, John H.
受贻贝粘附力的生物启发，通过原位形成的多层聚多巴胺纳米球的粘附自组装以及随后的热解，实现了制造大尺寸碳电极材料（GCF）的新方案。制造的 GCF 显示出由高石墨碳组成的 3D 分层多孔结构。这些特性允许GCF5中带电离子的快速扩散、高负载和有效吸收和交换，从而赋予GCF优异的电化学性能。当作为超级电容器电极进行测试时，GCF 在 0.5 M Na2SO4 溶液中、在 1.0 A cm(-3) 电流密度、0-1.0 V 电位窗口内表现出 105 F cm(-3) 的高体积电容。同时，GCF组装了一个简单的非对称超级电容器，可以稳定地为LED和小风扇供电，并且具有优异的循环稳定性，在10000次充放电循环后电容保持率为100%。值得注意的是，由于聚多巴胺对几乎所有基材的多功能粘合能力，这种开发的协议提供了制造大尺寸核壳电极的新途径，这在未来的便携式设备中具有吸引力。 (C) 2016 Elsevier Ltd. 保留所有权利。
Bio-inspired by mussels' adhesion, a new protocol for the fabrication of large-sized carbon electrode materials (GCFs) is achieved through an adhesive self-assembly of in-situ-formed multilayered poly dopamine nanospheres along with a subsequent pyrolysis. The fabricated GCFs show a 3D hierarchical porous architecture consisting of highly graphitic carbon. These features allow a rapid diffusion, high loading and effective absorbing and exchanging of charged ions in GCF5, which endows GCFs superior electrochemical performance. When tested as supercapacitor electrodes, the GCFs exhibit a high volumetric capacitance of 105 F cm(-3) at a current density of 1.0 A cm(-3) within a potential window of 0-1.0 V in 0.5 M Na2SO4 solution. Meanwhile, the GCFs has been assembled a simple asymmetrical super capacitor, which can stably supply power to a LED and a small fan with an excellent cycling stability of 100% capacitance retention after 10000 charge/discharge cycles. Worthy to note, due to the versatile adhesive ability of polydopamine to almost all substrates, this developed protocol provides new avenues to fabricate large-sized core-shell electrodes, which is attractive in future portable devices. (C) 2016 Elsevier Ltd. All rights reserved.