气候变化领域集成服务门户(CCPortal): Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials

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DOI	10.1016/j.scib.2020.01.011
	Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials
	Yi T.-F.; Qiu L.-Y.; Mei J.; Qi S.-Y.; Cui P.; Luo S.; Zhu Y.-R.; Xie Y.; He Y.-B.
发表日期	2020
ISSN	20959273
起始页码	546
结束页码	556
卷号	65 期号:7
英文摘要	In 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. © 2020 Science China Press
关键词	Cycling stability NiO NiO@NiMoO4@PPy Porous spherical structure Supercapacitor
英文关键词	Capacitance; Charge transfer; Density functional theory; Morphology; Polypyrroles; Probability density function; Reaction kinetics; Spheres; Supercapacitor; Charge-transfer reactions; Cycling stability; Density function theory; Electrochemical kinetics; Electronic conductivity; NiO@NiMoO4@PPy; Porous spherical; Specific surface area (SSA); Nickel oxide
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207274
作者单位	School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China; Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China; Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China; School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, 243002, China; School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China; Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, 066004, China
推荐引用方式 GB/T 7714	Yi T.-F.,Qiu L.-Y.,Mei J.,et al. Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials[J],2020,65(7).
APA	Yi T.-F..,Qiu L.-Y..,Mei J..,Qi S.-Y..,Cui P..,...&He Y.-B..(2020).Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials.Science Bulletin,65(7).
MLA	Yi T.-F.,et al."Porous spherical NiO@NiMoO4@PPy nanoarchitectures as advanced electrochemical pseudocapacitor materials".Science Bulletin 65.7(2020).