超级电容器
电极
氢氧化物
材料科学
化学工程
纳米技术
化学
电化学
工程类
物理化学
作者
Nanshi Wu,Jingxiang Low,Tao Liu,Jiaguo Yu,Shaowen Cao
标识
DOI:10.1016/j.apsusc.2017.03.297
摘要
Hierarchical hollow cages of Mn-Co layered double hydroxide (LDH) are fabricated for the application of supercapacitors. The hollow cages are sized in ∼300 nm with a unique porous structure assembled by nanosheets and a high specific surface area of 83 m2 g−1. As a pseudocapacitor, the as-obtained Mn-Co layered double hydroxide electrode exhibits enhanced specific capacitance, as compared to the commonly prepared Mn-Co layered double hydroxide. Moreover, the hierarchical hollow cages of Mn-Co layered double hydroxide show a good stability, with a specific capacity retention of 91.6% at the current density of 2 A g−1 for over 2000 charge-discharge cycles. Such performance enhancement is mainly attributed to the enlarged specific surface area, improved charge transportation and ion diffusion.
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