Ultrathin Ni-Al layered double hydroxide nanosheets with enhanced supercapacitor performance
Ultrathin Ni-Al layered double hydroxide nanosheets with enhanced supercapacitor performance
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具有增强超级电容器性能的超薄镍铝层状双氢氧化物纳米片
DOI：
10.1016/j.ceramint.2017.07.207
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发表时间：
2017-11-01
影响因子：
5.2
通讯作者：
Kong, Qinghong
中科院分区：
文献类型：
--
作者：
Liu, Huili;Yu, Tingting;Kong, Qinghong
为了提高Ni-Al层状双氢氧化物(Ni-Al LDH)作为超级电容器电极的电化学储能性能，采用简单的水热法制备了超薄的Ni-Al LDH纳米片。具有宽孔分布的超薄结构比表面积高达64.9m(2)g(-1)。超薄的Ni-Al LDH纳米片表现出优异的伪电容性能，在2Ag(-1)的电流密度下，3000次循环后的比电容达到1919Fg(-1)，容量保持率为433Fg(-1)。在30Ag(-1)的高电流密度下，可逆比容量达到1665Fg(-1)。这主要归功于Ni-Al LDH的超薄结构改善了伪电容反应。这一令人印象深刻的结果可能为其在高能量密度存储系统中的应用铺平道路。
To improve electrochemical energy storage performance of Ni-Al layered double hydroxide (Ni-Al LDH) as supercapacitor electrode, ultrathin Ni-Al LDH nanosheets were prepared by simple hydrothermal method. The surface area of the ultrathin structure with broad pore size distribution is high to 64.9 m(2) g(-1). The ultrathin Ni-Al LDH nanosheets exhibit excellent pseudocapacitance performance with a maximum specific capacitance of 1919 F g(-1) and a capacity retention of 433 F g(-1) after 3000 cycles at a current density of 2 A g(-1). Furthermore, a reversible capacity of 1665 F g(-1) was obtained at a much higher current density of 30 A g(-1). The fascinating performances can be attributed to the improvement of pseudocapacitive reaction by the ultrathin structure of Ni-Al LDH. The impressive results may pave the way for promising applications in high energy density storage systems.