Preparation of Novel 3D Graphene Networks for Supercapacitor Applications
Preparation of Novel 3D Graphene Networks for Supercapacitor Applications
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DOI：
10.1002/smll.201100990
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发表时间：
2011-11-18
期刊：
影响因子：
13.3
通讯作者：
Zhang, Hua
中科院分区：
文献类型：
--
作者：
Cao, Xiehong;Shi, Yumeng;Zhang, Hua
石墨烯是一种单原子厚度的二维sp2杂化碳片，由于其独特的结构和特殊的性质，近年来引起了人们越来越多的关注。[1]它的高理论表面积（2630 m2 g− 1）和高电导率使其成为储能系统中有吸引力的材料。[2]超级电容器由于其高功率性能、长寿命周期和低维护成本而被认为是有希望的储能候选者。[3]赝电容材料，例如过渡金属氧化物，正在被探索用于具有大比电容和高能量密度的超级电容器。[4]然而，赝电容器通常遭受低倍率容量和差的稳定性，因为活性材料通常是绝缘的或半导体的，这阻碍了高充电/放电速率所需的快速电子传输。
Graphene, a 2D sp 2-hybridized carbon sheet with one-atom thickness, has attracted increasing attention in recent years because of its unique structure and special properties.[1] Its high theoretical surface area (2630 m 2 g− 1) and high electrical conductivity make it an attractive material for applications in energy-storage systems.[2]The supercapacitor is considered as a promising candidate for energy storage due to its high power performance, long life cycle, and low maintenance cost.[3] Pseudocapacitive materials, such as transition metal oxides, are being explored for use in supercapacitors with a large specific capacitance and high energy density.[4] However, pseudocapacitors often suffer from the low rate capability and poor stability, because the active materials are usually insulating or semiconducting, which hinders the fast electron transport required for high charge/discharge rates.