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Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials
Alternative TitlePorous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials
Yi TingFeng1; Qiu LiYing1; Mei Jie4; Qi SiYu1; Cui Ping4; Luo Shaohua2; Zhu YanRong2; Xie Ying5; He YanBing6
2020
Source PublicationSCIENCE BULLETIN
ISSN2095-9273
Volume65Issue:7Pages:546-556
AbstractIn this work, a rational design and construction of porous spherical NiO@NiMoO4 wrapped with PPy was reported for the application of high-performance supercapacitor (SC). The results show that the NiMoO4 modification changes the morphology of NiO, and the hollow internal morphology combined with porous outer shell of NiO@NiMoO4 and NiO@NiMoO4@PPy hybrids shows an increased specific surface area (SSA), and then promotes the transfer of ions and electrons. The shell of NiMoO4 and PPy with high electronic conductivity decreases the charge-transfer reaction resistance of NiO, and then improves the electrochemical kinetics of NiO. At 20 A g(-1), the initial capacitances of NiO, NiMoO4, NiO@NiMoO4 and NiO@NiMoO4@PPy are 456.0, 803.2, 764.4 and 941.6 F g(-1), respectively. After 10,000 cycles, the corresponding capacitances are 346.8, 510.8, 641.2 and 904.8 F g(-1), respectively. Especially, the initial capacitance of NiO@NiMoO4@PPy is 850.2 F g(-1), and remains 655.2 F g(-1) with a high retention of 77.1% at 30 A g(-1) even after 30,000 cycles. The calculation result based on density function theory shows that the much stronger Mo-O bonds are crucial for stabilizing the NiO@NiMoO4 composite, resulting in a good cycling stability of these materials. (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
KeywordELECTRODE MATERIALS NANOWIRE ARRAYS SUPERCAPACITOR ELECTRODE ENHANCED PERFORMANCE OXYGEN EVOLUTION ENERGY DENSITY LONG-LIFE NI FOAM SHELL HYBRID NiO NiO@NiMoO4@PPy Porous spherical structure Supercapacitor Cycling stability
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Fundamental Research Funds for the Central Universities] ; [Key Program for International S&T Cooperation Projects of China]
CSCD IDCSCD:6691622
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/149300
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.Northeastern Univ Qinhuangdao, Sch Resources & Materials, Qinhuangdao 066004, Hebei, Peoples R China
3.Key Lab Dielect & Elect Funct Materials Hebei Prov, Qinhuangdao 066004, Hebei, Peoples R China
4.安徽大学
5.陕西省地震局
6.清华大学
Recommended Citation
GB/T 7714
Yi TingFeng,Qiu LiYing,Mei Jie,et al. Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials[J]. SCIENCE BULLETIN,2020,65(7):546-556.
APA Yi TingFeng.,Qiu LiYing.,Mei Jie.,Qi SiYu.,Cui Ping.,...&He YanBing.(2020).Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials.SCIENCE BULLETIN,65(7),546-556.
MLA Yi TingFeng,et al."Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials".SCIENCE BULLETIN 65.7(2020):546-556.
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