NiGa2O4 Nanosheets in a Microflower Architecture as Anode Materials for Li-Ion Capacitors

doi:10.1021/acsanm.9b01222

	NiGa2O4 Nanosheets in a Microflower Architecture as Anode Materials for Li-Ion Capacitors
	He, Zheng-Hua 1; Gao, Jian-Fei 1; Kong, Ling-Bin1,2
	2019-10
发表期刊	ACS APPLIED NANO MATERIALS
ISSN	2574-0970
卷号	2 期号:10 页码:6238-6248
摘要	Because of its lower toxicity, lower cost, high chemical and thermodynamic stability, and abundant reserves, NiO has attracted extensive attention and research in the field of energy storage. However, its application for Li-ion hybrid capacitors (LIHC) is limited by its single energy storage mechanism, large volume expansion during the cycling process, and slow kinetics process, which makes it difficult to match with carbon electrode. Here, through simple hydrothermal growth and subsequent calcination treatment, a NiGa2O4 material that is deposited by nanosheets into nanoflower shape is obtained. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) were used to characterize the sample. The results showed that NiGa2O4 with the self-assembled micronflower with nanosheet was successfully prepared without heterophase. Subsequently, half-cells electrochemical test showed that the material had a mixed energy storage mechanism combining the alloy reaction to Ga with the conversion reaction to Ni. The combination of the two energy storage mechanisms makes NiGa2O4 have better cyclic stability than NiO. By calculation of the relationship between peak current and scanning speed, b = 0.94 of NiGa2O4 is obtained, and its electrochemical behavior is closer to the pseudocapacitance behavior caused by surface redox reaction than NiO. Consequently, the NiGa2O4//AC LIHC device exhibits excellent cycling stability (capacity retention of 82% after 8000 cycles), high energy density of 104.89 Wh kg(-1) (at 200 W kg(-1)), and high power density of 3999 W kg(-1) (at 25.44 Wh kg(-1)). Therefore, this NiGa2O4 with nanosheets in a microflower architecture, double energy storage mechanism, and fast kinetic process is expected to replace NiO as the next generation of research hotspot.
关键词	nanosheets microflower cyclic stability dual-energy storage mechanism lithium-ion hybrid capacitor kinetics
DOI	10.1021/acsanm.9b01222
收录类别	SCI ; SCIE
语种	英语
资助项目	National Natural Science Foundation of China[51971104][51762031]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000507667200020
出版者	AMER CHEMICAL SOC
EI入藏号	20194107527043
EI主题词	Storage (materials)
EI分类号	525.7 Energy Storage - 694.4 Storage - 714.1 Electron Tubes - 761 Nanotechnology - 801 Chemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 931 Classical Physics ; Quantum Theory ; Relativity - 933 Solid State Physics
来源库	WOS
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64182
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Kong, Ling-Bin
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室; 材料科学与工程学院
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	He, Zheng-Hua,Gao, Jian-Fei,Kong, Ling-Bin. NiGa2O4 Nanosheets in a Microflower Architecture as Anode Materials for Li-Ion Capacitors[J]. ACS APPLIED NANO MATERIALS,2019,2(10):6238-6248.
APA	He, Zheng-Hua,Gao, Jian-Fei,&Kong, Ling-Bin.(2019).NiGa2O4 Nanosheets in a Microflower Architecture as Anode Materials for Li-Ion Capacitors.ACS APPLIED NANO MATERIALS,2(10),6238-6248.
MLA	He, Zheng-Hua,et al."NiGa2O4 Nanosheets in a Microflower Architecture as Anode Materials for Li-Ion Capacitors".ACS APPLIED NANO MATERIALS 2.10(2019):6238-6248.