NiGa2O4 Nanosheets in a Microflower Architecture as Anode Materials for Li-Ion Capacitors
He, Zheng-Hua1; Gao, Jian-Fei1; Kong, Ling-Bin1,2
2019-10
Source PublicationACS APPLIED NANO MATERIALS
ISSN2574-0970
Volume2Issue:10Pages:6238-6248
AbstractBecause 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.
Keywordnanosheets microflower cyclic stability dual-energy storage mechanism lithium-ion hybrid capacitor kinetics
DOI10.1021/acsanm.9b01222
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51971104][51762031]
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000507667200020
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64182
Collection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
Corresponding AuthorKong, Ling-Bin
Affiliation1.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
First Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Corresponding Author AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials;  Coll Mat Sci & Engn
First Signature AffilicationState Key Laboratory Of Gansu Advanced Non-Ferrous Metal Materials
Recommended Citation
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.
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