3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor

doi:10.1016/j.jallcom.2020.158275

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	3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor
	H. Xiong; L. Liu; L. Fang; F. Wu; S. Zhang; H. Luo; C. Tong; B. Hu and M. Zhou
刊名	Journal of Alloys and Compounds
	2021
卷号	857
ISSN号	9258388
DOI	10.1016/j.jallcom.2020.158275
英文摘要	Two kinds of nanostructured ZnO, namely nanorods (ZnO NR) and nanoflakes (ZnO NF) were first prepared on conductive flexible carbon cloth (CC) by a hydrothermal route. Then nickel cobalt layered double hydroxide (NiCo-LDH) nanoflakes were directly hydrothermally deposited on them to construct three-dimensional (3D) self-supporting heterostructure NiCo-LDH/ZnO NR/CC and NiCo-LDH/ZnO NF/CC flexible electrodes. The effects of different nanostructured ZnO on morphology, structure and electrochemical performance of NiCo-LDH/ZnO/CC composite materials were investigated. It is found that NiCo-LDH nanoflakes grown on ZnO NF/CC substrate are more compact and uniform than those on ZnO NR/CC substrate. Moreover, NiCo-LDH/ZnO NF/CC electrode presents better electrochemical properties than NiCo-LDH/ZnO NR/CC electrode with 2.6 times higher specific capacitance (1577.6 F g1 at 1 A g1), 2.2 times better rate capability, and 1.5 time greater cycle stability, which may be attributed to the larger contact area and more redox-active sites provided by the NiCo-LDH NFs grown on ZnO NFs. Furthermore, the as-assembled solid-state flexible NiCo-LDH/ZnO NF//AC (active carbon) asymmetric supercapacitor (ASC) delivers a maximal energy density of 51.39 Wh kg1 (800 W kg1) with a high operating window of 1.6 V, and exhibits great cyclic stability with 87.3% capacitance retaining after 1000 cycles, which is higher than many reported ASCs. Finally, two packaged ASCs in series successfully lighted a red light-emitting diode (LED, 2.2 V/20 mA), evincing the potentiality of practical application. 2020 Elsevier B.V.
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内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/65011]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. Xiong,L. Liu,L. Fang,et al. 3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor[J]. Journal of Alloys and Compounds,2021,857.
APA	H. Xiong.,L. Liu.,L. Fang.,F. Wu.,S. Zhang.,...&B. Hu and M. Zhou.(2021).3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor.Journal of Alloys and Compounds,857.
MLA	H. Xiong,et al."3D self-supporting heterostructure NiCo-LDH/ZnO/CC electrode for flexible high-performance supercapacitor".Journal of Alloys and Compounds 857(2021).