Free-standing cotton-derived carbon microfiber@nickel-aluminum layered double hydroxides composite and its excellent capacitive performance
Free-standing cotton-derived carbon microfiber@nickel-aluminum layered double hydroxides composite and its excellent capacitive performance
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自支撑棉源碳微纤维@镍铝层状双氢氧化物复合材料及其优异的电容性能
DOI：
10.1016/j.jallcom.2019.01.270
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发表时间：
2019-05
影响因子：
6.2
通讯作者：
Yan Zifeng
中科院分区：
文献类型：
--
作者：
Xu Jing;Li Xiaochen;Li Xuejin;Li Shuo;Zhao Lianming;Wang D;an;Xing Wei;Yan Zifeng
超级电容器的主要瓶颈是其能量密度低，主要是由电极材料的低容量引起的。虽然已经选择了一些赝电容金属氧化物/氢氧化物来提高超级电容器的能量密度，但是它们的低电导率和较差的可逆性仍然需要考虑。在这项工作中，我们通过简单的水热方法制备了由NiAl-层状双氢氧化物（LDH）纳米片修饰在棉衍生的碳微纤维（CMF@NiAl-LDH）上的自支撑复合材料。大规模和可压缩的棉花衍生的碳纤维与连接的三维孔作为导电骨干的NiAl-LDH纳米片的生长。它不仅可以提高NiAl-LDH的导电性，而且可以改善NiAl-LDH纳米片的分布，导致快速的电子和电解质离子传输动力学。NiAl-LDH纳米片之间丰富的空间以及CMF发达的3D孔隙可以容纳NiAl-LDH在长寿命循环过程中的体积膨胀。得益于这些合理的设计，所制备的CMF@NiAl-LDH电极在水电解质中表现出显著改善的电容性能，包括高的比电容（1667 F g− 1 at 1 A g−1）、优异的倍率性能（68.7%保留在15 A g−1）和显著的循环稳定性（105.4%保留在2000次循环后）。组装的CMF@NiAl-LDH//多孔碳不对称超级电容器可以提供45.2 Wh Kg−1的大能量密度。该研究表明，所制备的CMF@NiAl-LDH电极在大规模储能器件应用中提供了巨大的潜力。
The main bottleneck of supercapacitor is its low energy density, mainly arising from the low capacity of the electrode materials. Although some pseudocapacitive metal oxide/hydroxides have been selected to improve the energy density of supercapacitor, their low conductivity and inferior reversibility still need to be considered. In this work, we prepared a free-standing composite comprised of NiAl-layered double hydroxide (LDH) nanoflakes decorated on a cotton derived carbon microfiber (CMF@NiAl-LDH) via a facile hydrothermal method. The large-scale and compressible cotton derived carbon fiber with connected three-dimensional pores served as conductive backbones for the growth of the NiAl-LDH nanoflakes. It can not only improve the conductivity of NiAl-LDH, but also amend the distribution of NiAl-LDH nanosheets, leading to both rapid electron and electrolyte ions transport kinetics. The abundant space among NiAl-LDH nanoflakes as well as developed 3D pores of CMF can accommodate the volume expansion of NiAl-LDH during long lifespan cycling. Benefited from these rational design, the as-prepared CMF@NiAl-LDH electrode exhibited significantly improved capacitive performance in terms of high specific capacitance (1667 F g−1at 1 A g−1), excellent rate performance (68.7% retained at 15 A g−1) and remarkable cyclic stability (105.4% maintained after 2000 cycles) in aqueous electrolytes. The assembled CMF@NiAl-LDH//porous carbon asymmetric supercapacitor can deliver a large energy density of 45.2 Wh Kg−1. This investigation suggests that the prepared CMF@NiAl-LDH electrode offers a great potential in large-scale energy storage device applications.
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影响因子：
3.2
作者：
M. Yassine;D. Fabris
通讯作者：
M. Yassine;D. Fabris
影响因子：
9
作者：
J. Kaldellis;D. Zafirakis
通讯作者：
J. Kaldellis;D. Zafirakis
影响因子：
24.2
作者：
Long, Xia;Wang, Zilong;Yang, Shihe
通讯作者：
Yang, Shihe
影响因子：
9.2
作者：
Changfu Zou;Lei Zhang;Xiaosong Hu;Zhenpo Wang;T. Wik;Michael G. Pecht
通讯作者：
Changfu Zou;Lei Zhang;Xiaosong Hu;Zhenpo Wang;T. Wik;Michael G. Pecht
氟化石墨烯/CoAl层状双氢氧化物复合材料超级电容器电极材料的合成
影响因子：
9.5
作者：
Peng, Weijun;Li, Hongqiang;Song, Shaoxian
通讯作者：
Song, Shaoxian