| Ni–Al composite hydroxides fabricated by cation–anion double hydrolysis method for high-performance supercapacitor |
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| 作者姓名： | Shuang-Shuang Yang Ming-Jiang Xie Yu Shen Yong-Zheng Wang Xue-Feng Guo Bin Shen |
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| 作者单位： | a School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;
b Key Lab of Mesoscopic Chemistry MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China |
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| 基金项目： | supported by the National Natural Science Foundation of China (Nos. 20773062, 20773063, 21173119, and 21273109);the Fundamental Research Funds for the CentralUniversities;the Project Funded by the Priority Academ Program Development of Jiangsu Higher Education Institutio (PAPD) |
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| 摘 要： | Chemical doping of nickel hydroxide with other cations(e.g. Al~(3+)) is an efficient way to enhance its electrochemical capacitive performances. Herein, a simple cation–anion(Ni~(2+)and AlO_2) double hydrolysis method was developed toward the synthesis of nickel–aluminum(Ni–Al) composite hydroxides. The obtained composite hydroxides possesses a porous structure, large surface area(121 m~2/g) and homogeneous element distribution. The electrochemical test shows that the obtained composite hydroxides exhibits a superior supercapacitive performances(specific capacitance of 1670F/g and rate capability of 87% from 0.5 A/g to 20 A/g) to doping-free nickel hydroxide(specific capacitance of 1227 F/g and rate capability of 47% from 0.5 A/g to 20 A/g). Moreover, the galvanostatic charge/discharge test displays that after 2000 cycles at large current density of 10 A/g, the composite hydroxides achieves a high capacitance retention of 98%, indicative of an excellent electrochemical cycleability.
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| 关 键 词： | Nanocomposites Porous materials Double hydrolysis Doped Ni(OH)2 Energy storage |
Ni–Al composite hydroxides fabricated by cation–anion double hydrolysis method for high-performance supercapacitor |
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| Shuang-Shuang Yang,Ming-Jiang Xie,Yu Shen,Yong-Zheng Wang,Xue-Feng Guo,Bin Shen.Ni–Al composite hydroxides fabricated by cation–anion double hydrolysis method for high-performance supercapacitor[J].Chinese Chemical Letters,2016,27(4):507-510. |
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| Authors: | Shuang-Shuang Yang;Ming-Jiang Xie;Yu Shen;Yong-Zheng Wang;Xue-Feng Guo;Bin Shen; |
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| Institution: | a School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China;
b Key Lab of Mesoscopic Chemistry MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China |
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| Abstract: | Chemical doping of nickel hydroxide with other cations (e.g. Al3+) is an efficient way to enhance its electrochemical capacitive performances. Herein, a simple cation-anion (Ni2+ and AlO2-) double hydrolysis method was developed toward the synthesis of nickel-aluminum (Ni-Al) composite hydroxides. The obtained composite hydroxides possesses a porous structure, large surface area (121 m2/g) and homogeneous element distribution. The electrochemical test shows that the obtained composite hydroxides exhibits a superior supercapacitive performances (specific capacitance of 1670 F/g and rate capability of 87% from 0.5 A/g to 20 A/g) to doping-free nickel hydroxide (specific capacitance of 1227 F/g and rate capability of 47% from 0.5 A/g to 20 A/g). Moreover, the galvanostatic charge/discharge test displays that after 2000 cycles at large current density of 10 A/g, the composite hydroxides achieves a high capacitance retention of 98%, indicative of an excellent electrochemical cycleability. |
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| Keywords: | Nanocomposites Porous materials Double hydrolysis Doped Ni(OH)2 Energy storage |
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