钴
化学
超级电容器
储能
过渡金属
镍
水溶液
化学工程
三元运算
纳米技术
纳米材料
电化学
催化作用
无机化学
电极
材料科学
物理化学
热力学
有机化学
功率(物理)
物理
工程类
计算机科学
程序设计语言
作者
Yidan Gao,Ziming Qiu,Yao Lu,Huijie Zhou,Rui Zhu,Zheng Liu,Huan Pang
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2023-02-15
卷期号:62 (8): 3669-3678
被引量:9
标识
DOI:10.1021/acs.inorgchem.3c00038
摘要
Three-dimensional (3D) superstructure nanomaterials with special morphologies and novel properties have attracted considerable attention in the fields of optics, catalysis, and energy storage. The introduction of high entropy into ammonium phosphate (NPO·nH2O) has not yet attracted much attention in the field of energy storage materials. Herein, we systematically synthesize a series of 3D superstructures of NPOs·nH2O ranging from unitary, binary, ternary, and quaternary to high-entropy by a simple chemical precipitation method. These materials have similar morphology, crystallinity, and synthesis routes, which eliminates the performance difference caused by the interference of physical properties. Subsequently, cobalt-nickel ammonium phosphate (CoxNiy-NPO·nH2O) powders with different cobalt-nickel molar ratios were synthesized to predict the promoting effect of mixed transition metals in supercapacitors. It is found that the CoxNiy-NPO·nH2O 3D superstructures with a Co/Ni ratio of 1:1 show the best electrochemical performance for energy storage. The aqueous device shows a high energy density of 36.18 W h kg-1 at a power density of 0.71 kW kg-1, and when the power density is 0.65 kW kg-1, the energy density of the solid-state device is 13.83 W h kg-1. The work displays a facile method for the fabrication of 3D superstructures assembled by 2D nanosheets that can be applied in energy storage.
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