Facile synthesis of a nano-structured nickel oxide electrode with outstanding pseudocapacitive properties

Facile synthesis of a nano-structured nickel oxide electrode with outstanding pseudocapacitive properties
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轻松合成具有出色赝电容特性的纳米结构氧化镍电极

DOI:
10.1016/j.electacta.2013.05.031
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发表时间:
2013-08
影响因子:
6.6
通讯作者:
Wang, Xuefeng
Wang, Xuefeng
中科院分区:
材料科学2区
文献类型:
--
作者:
Wang, Huanwen;Yi, Huan;Chen, Xiao;Wang, Xuefeng

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采用两步法在导电镍泡沫衬底上生长均匀的NiO纳米颗粒,设计了一种高性能超级电容器的优越电极。该制备策略包括在泡沫镍上电沉积氢氧化镍前驱体和随后的低温退火工艺。这些NiO纳米颗粒相互连接,形成一个具有高度开放和多孔结构的松散网络。这种独特的3D NiO-Ni泡沫电极表现出电解质渗透和离子迁移以及大的电活性表面积。结果表明,该材料具有较高的比电容(2Ag−1时,0.5V电位窗口为2558Fg−1)和优良的倍率性能(40Ag−1时容量保持率为70%),在高性能储能系统的发展中具有很大的潜力。
A superior electrode for high-performance supercapacitors has been designed by growing homogeneous NiO nanoparticles on conductive Ni foam substrate through a facile two-step method. The preparation strategy involves the electrodeposition of nickel hydroxide precursor on Ni foam and subsequent low-temperature annealing process. These NiO nanoparticles are interconnected with each other, forming a loose network with a highly open and porous structure. This unique 3D NiO–Ni foam electrode manifests the electrolyte penetration and ion migration as well as large electroactive surface area. As a result, outstanding pseudocapacitive performance is achieved with a high specific capacitance (2558Fg−1at 2Ag−1in a potential window of 0.5V) and excellent rate capability (70% capacity retention at 40Ag−1), which shows great potential in the development of high-performance energy-storage systems.
多孔氧化镍纳米纺锤体具有巨大的比电容和长生命周期
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