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Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance

文献类型：期刊论文

作者Liang, Dewei1,2,3; Wu, Shouliang1,2; Liu, Jun1,2; Tian, Zhenfei1,2; Liang, Changhao1,2,3
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2016
卷号4期号:27页码:10609-10617
DOI10.1039/c6ta03408j
文献子类Article
英文摘要Morphology control and impurity doping are two widely applied strategies to improve the electrochemical performance of nanomaterials. Herein, we report an environmentally friendly approach to obtain Co-doped Ni(OH)(2) nanosheet networks using a laser-induced cobalt colloid as a doping precursor followed by an aging treatment in a hybrid medium of nickel ions. The shape and specific surface area of the doped Ni(OH)(2) can be successfully adjusted by changing the concentration of sodium thiosulfate. Furthermore, a Co-doped Ni(OH)(2) nanosheet network was further converted into Co-doped NiO with its pristine morphology retained via facile thermal decomposition in air. The structure and electrochemical performance of the as-prepared samples are investigated with scanning and transmission electron microscopy, energy dispersive X-ray analysis, X-ray diffraction, Fourier transform infrared spectroscopy, the nitrogen adsorption-desorption isotherm technique, and electrochemical measurements. The Co-doped Ni(OH)(2) electrode shows an ultrahigh specific capacitance of 1421 F g(-1) at a current density of 6 A g(-1), and a good retention level of 76% after 1000 cycles, in sharp contrast with only a 47% retention level of the pure Ni(OH) 2 electrode at the same current density. In addition, the Co-doped NiO electrode exhibits a capacitance of 720 F g(-1) at 6 A g(-1) and 92% retention after 1000 cycles, which is also superior to the corresponding values of relevant pure NiO electrodes. The Co2+ partially substitutes for Ni2+ in the metal hydroxide and oxide, resulting in an increase of free holes in the valence band, and, therefore, enhancement of the p-type conductivity of Ni(OH)(2) and NiO. Moreover, such novel mesoporous nanosheet network structures are also able to enlarge the electrode-electrolyte contact area and shorten the path length for ion transport. The synergetic effect of these two results is responsible for the observed ultrahigh pseudocapacitor performance.
WOS关键词LITHIUM ION BATTERIES ; SUPERCAPACITOR ELECTRODE MATERIALS ; NICKEL-HYDROXIDE ; ELECTROCHEMICAL PERFORMANCE ; MESOPOROUS ALPHA-NI(OH)(2) ; HIERARCHICAL MICROSPHERES ; NI(OH)(2) NANOPARTICLES ; COBALT HYDROXIDE ; ANODE MATERIALS ; NANOSTRUCTURES
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
WOS记录号WOS:000379493500029
资助机构National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Basic Research Program of China(2014CB931704) ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; National Natural Science Foundation of China (NSFC)(11174287 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 51371166 ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308) ; 11204308)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/22024]  
专题合肥物质科学研究院_中科院固体物理研究所
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Peoples R China
3.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Liang, Dewei,Wu, Shouliang,Liu, Jun,et al. Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(27):10609-10617.
APA Liang, Dewei,Wu, Shouliang,Liu, Jun,Tian, Zhenfei,&Liang, Changhao.(2016).Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance.JOURNAL OF MATERIALS CHEMISTRY A,4(27),10609-10617.
MLA Liang, Dewei,et al."Co-doped Ni hydroxide and oxide nanosheet networks: laser-assisted synthesis, effective doping, and ultrahigh pseudocapacitor performance".JOURNAL OF MATERIALS CHEMISTRY A 4.27(2016):10609-10617.

入库方式： OAI收割

来源：合肥物质科学研究院

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