Citation: 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. shu

Ni-Al composite hydroxides fabricated by cation-anion double hydrolysis method for high-performance supercapacitor

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

Received Date: 30 December 2015
Revised Date: 15 January 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 20773062, 20773063, 21173119, and 21273109), the Fundamental Research Funds for the Central Universities, and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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.
- Nanocomposites,
- Porous materials,
- Double hydrolysis,
- Doped Ni(OH)₂,
- Energy storage
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