Hierarchical NiCo-layered double hydroxide nanoscroll@PANI nanocomposite for high performance battery-type supercapacitor
Hierarchical NiCo-layered double hydroxide nanoscroll@PANI nanocomposite for high performance battery-type supercapacitor
复制标题
用于高性能电池型超级电容器的分层NiCo层状双氢氧化物纳米卷@PANI纳米复合材料
DOI：
10.1016/j.electacta.2020.135869
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发表时间：
2020-04-01
影响因子：
6.6
通讯作者：
Zheng, Qiang
中科院分区：
文献类型：
--
作者：
Hu, Wenxuan;Chen, Lu;Zheng, Qiang
本文采用一种简单的方法制备了分级结构的镍钴层状双氢氧化物（NiCo-LDH）/聚苯胺（PANI）复合材料。首先通过电沉积的方法在碳布表面均匀覆盖聚苯胺纳米膜，然后通过水热法在碳布表面生长NiCo-LDH纳米卷。聚苯胺纳米膜的引入对实现具有巨大比表面积和良好电化学性能的NiCo-LDH纳米卷的生长起着关键作用。NiCo-LDH@PANI@CC纳米复合材料在1 A g（-1）下具有1835 F g（-1）（901 C g（-1））的优异比电容，从1 A g（-1）到10 A g（-1）具有81%的优异倍率性能，并且具有良好的循环性能，在3000次循环后具有78%的电容保持率。此外，由NiCo-LDH@PANI@CC和活性炭组装的非对称超级电容器在728.2W kg（-1）的功率密度下提供26.5Wh kg（-1）的良好能量密度和优异的循环稳定性，5000次循环后的电容保持率为78%。(C)2020爱思唯尔有限公司保留所有权利。
In this paper, a facile strategy is developed to fabricate hierarchical NiCo layered double hydroxide (NiCo-LDH) and polyaniline (PANI) composite. A PANI nanolayer firstly uniformly covers the surface of carbon cloth (CC) by electrodeposition, followed by the growth of NiCo-LDH nanoscrolls via a hydrothermal process. The introduction of the PANI nanolayer plays a critical role in realizing the growth of NiCo-LDH nanoscroll, which possesses huge specific surface area and better electrochemical performance. The NiCo-LDH@PANI@CC nanocomposite delivers an excellent specific capacitance of 1835 F g(-1) (901C g(-1)) at 1 A g(-1), outstanding rate capability with a capacitance retention of 81% from 1 A g(-1) to 10 A g(-1) and good cycling ability with a capacitance retention of 78% after 3000 cycles. In addition, the asymmetric supercapacitor assembled by the NiCo-LDH@PANI@CC and active carbon supplies a good energy density of 26.5 Wh kg(-1) at a power density of 728.2 W kg(-1) and excellent cycling stability with a capacitance retention of 78% after 5000 cycles. (C) 2020 Elsevier Ltd. All rights reserved.