Green solvothermal synthesis of micro-/nano-structured porous β-Ni(OH)2 microspheres with enhanced electrochemical performance

被引:13
作者
Zhang, Yabin [2 ,3 ,4 ]
Liang, Weixin [2 ,3 ,4 ]
Wang, Ben [2 ,3 ,4 ]
Wang, Guiyuan [2 ,3 ,4 ]
Guo, Zhiguang [1 ,2 ,3 ,4 ]
机构
[1] Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[2] Hubei Univ, Minist Educ, Key Lab Green Preparat & Applicat Funct Mat, Wuhan 430062, Peoples R China
[3] Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430062, Peoples R China
[4] Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
关键词
Flower-like beta-Ni(OH)(2) microspheres; Porous structure; Specific surface area; Electrochemical performance; ALPHA-NICKEL HYDROXIDE; HIERARCHICAL BETA-NI(OH)(2); ASSISTED SYNTHESIS; NANOSTRUCTURED MATERIALS; FORMATION MECHANISM; SURFACE-AREA; ARCHITECTURES; ELECTRODEPOSITION; TEMPERATURE; MORPHOLOGY;
D O I
10.1016/j.materresbull.2014.11.035
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Flower-like beta-Ni(OH)(2) microspheres have been synthesized via a PEG-assisted solvothermal process and a simple post-treatment. The result microspheres exhibit a highly porous structure with higher surface area (201 m(2)/g), which is beneficial to improving electrochemical properties. The morphology evolutions were well studied in detail to analyze the potential growth mechanism. While these porous hierarchical beta-Ni(OH)(2) microspheres were coated on the surface of nickel foam and evaluated as electrode materials, they delivered an excellent capacitance of 1401.1 F/g at 1 A/g, and 720 F/g even at a higher current density of 20 A/g. Furthermore, at a higher current density of 20 A/g, the capacitance still remains 89.0% of its initial capacitance after 1000 cycles. These results suggest that the porous beta-Ni(OH)(2) flower-like microsphere is a highly promising candidate for supercapacitor electrodes. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:386 / 394
页数:9
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