Hierarchical cobalt oxide@Nickel-vanadium layer double hydroxide core/shell nanowire arrays with enhanced areal specific capacity for nickel-zinc batteries

JOURNAL OF POWER SOURCES

卷:436

Article

Wang, Shiyuan¹  Lai, Shibin²  Li, Pengsong¹  Gao, Tengfei¹  Sun, Kai¹  Ding, Xiaotao⁵  Xie, Tianhui²  Wu, Chuan¹  Li, Xuejin³  Kuang, Yun²  Liu, Wen²  Yang, Weimin⁶  Sun, Xiaoming^2,4 

[1] Beijing Univ Chem Technol, Coll Energy, Beijing 100029, Peoples R China

[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[3] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[4] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China

[5] Shandong Saikesaisi Hydrogen Energy Co Ltd, Jinan 250101, Shandong, Peoples R China

[6] Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China

关键词: Hierarchical structure;    Ni-Zn batteries;    Nanowires array;    Layered double hydroxide;    Cycling stability;   

DOI  :  10.1016/j.jpowsour.2019.226867

来源: Elsevier

【 摘 要 】

The aqueous Nickel-Zinc batteries have advantages of high safety and environmental benignity. However, their low energy density and poor cycling stability hinder their widespread applications. To address these issues, we demonstrate here a well-aligned hierarchical nanowires array as an advanced cathode for Nickel-Zinc batteries, which is composed of Nickel-vanadium layered double hydroxide decorated on cobalt oxide with a core/sheath configuration featuring merits of high electrical conductivity, large specific surface area, and short diffusion pathway for ions and electrons. Benefiting from the hierarchy structure design and component synergistic effect, the nanowires array electrode with high mass-loading of 11.1 mg cm(-2) exhibits high areal capacity of 1.98 mAh cm(-2) at 5 mA cm(-2), 61.8% capacity retention at 50 mA cm(-2) and excellent cycling stability with 100% retention after 1000 cycles. Moreover, full cell of the as-fabricated nanowiress arrays//Zinc configuration delivers high operating voltage of 1.71 V, energy density up to 2.2 mWh cm(-2), power density up to 82.0 mW cm(-2) and remarkable cycling stability of 89% capacity retention after 1500 cycles, showing great potential for practical applications. This work may also bring new design opportunities for the well-defined nanoarrays electrode in other energy storage devices.

【 授权许可】

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