以氧化石墨(GO)和硝酸镍为原料,采用水热法制备氢氧化镍/还原氧化石墨烯(Ni(OH)2/RGO)复合材料,通过FT-IR光谱、X射线衍射仪和扫描电镜表征了材料的形貌和结构,并采用循环伏安法、恒流充放电和交流阻抗谱测试了复合材料的电化学性能.结果表明,当水热温度为100℃时,制备了具有α相与β相互嵌型的α/β-Ni(OH)2/RGO复合材料.在电解液为6 mol/L的KOH溶液中,放电倍率0.2 C时复合材料比容量高达388.6 mAh/g,放电倍率为10 C时,复合材料比容量为266.1 mAh/g,比容量保持率为68.5%,显现出良好的电化学性能.
Nickel hydroxide/reduced graphene oxide (RGO)Composite was synthesized using graphite oxide and nickel nitrate as raw material by hydrothermal method.The samples were characterized using FT-IR spectra,X-ray diffraction,and scanning electron microscopy.The electrochemical performances were investigated using cy-clic voltammetry,galvanostatic charge-discharge,and electrochemical impedance spectroscopy.The results show thatα/βmutually embeddedα/β-Ni(OH)2/RGO composite was synthesized When hydrothemal tempera-ture was 100 ℃.The maximum specific capacitance of theα/β-Ni(OH)2/RGO composite was 388.6 mAh/g in 6 mol/L KOH electrolyte at 0.2 C rate.The specific capacitance of theα/β-Ni(OH)2/RGO composite was 266.1 mAh/g at 10 C rate.The specific capacitance retention was 68.5%.It indicates that the electrode material show excellent electrochemical performance.
参考文献
| [1] | Shuhua Yang;Xuefeng Song;Peng Zhang.Facile Synthesis of Nitrogen-Doped Graphene-Ultrathin MnO2 Sheet Composites and Their Electrochemical Performances[J].ACS applied materials & interfaces,20138(8):3317-3322. |
| [2] | Xianjun Zhu;Yu Zhong;Haidie Zhai;Zan Yan;Dongfong Li.Nanoflake nickel hydroxide and reduced graphene oxide composite as anode materials for high capacity lithium ion batteries[J].Electrochimica Acta,2014:364-369. |
| [3] | Xi'an Chen;Xiaohua Chen;Fengqiao Zhang;Zhi Yang;Shaoming Huang.One-pot hydrothermal synthesis of reduced graphene oxide/carbon nanotube/α-Ni(OH)_2 composites for high performance electrochemical supercapacitor[J].Journal of Power Sources,2013Dec.1(Dec.1):555-561. |
| [4] | Li Li Zhang;Zhigang Xiong;X.S. Zhao.A composite electrode consisting of nickel hydroxide, carbon nanotubes, and reduced graphene oxide with an ultrahigh electrocapacitance[J].Journal of Power Sources,2013Jan.15(Jan.15):326-332. |
| [5] | Geim AK;Novoselov KS.The rise of graphene[J].Nature materials,20073(3):183-191. |
| [6] | Dao-Lai Fang;Zhi-Dao Chen;Xin Liu;Zheng-Fei Wu;Cui-Hong Zheng.Homogeneous growth of nano-sized β-Ni(OH)_2 on reduced graphene oxide for high-performance supercapacitors[J].Electrochimica Acta,2012:321-329. |
| [7] | 杨勇辉;孙红娟;彭同江.石墨烯的氧化还原法制备及结构表征[J].无机化学学报,2010(11):2083-2090. |
| [8] | 栗飞;赫文秀;张永强;孟晶;樊晶晶.纳米花瓣状Ni（OH）2的制备及性能研究[J].人工晶体学报,2015(3):722-727. |
| [9] | 李延伟;李月晓;姚金环;刘长久;朱文凤.α/β互嵌氢氧化镍电极活性材料的结构和电化学性能[J].材料研究学报,2011(1):51-56. |
| [10] | Wang, HL;Robinson, JT;Li, XL;Dai, HJ.Solvothermal Reduction of Chemically Exfoliated Graphene Sheets[J].Journal of the American Chemical Society,200929(29):9910-9911. |
| [11] | Songfeng Pei;Hui-Ming Cheng.The reduction of graphene oxide[J].Carbon: An International Journal Sponsored by the American Carbon Society,20129(9):3210-3228. |
| [12] | Wang, H.;Casalongue, H.S.;Liang, Y.;Dai, H..Ni(OH)_2 nanoplates grown on graphene as advanced electrochemical pseudocapacitor materials[J].Journal of the American Chemical Society,201021(21):7472-7477. |
| [13] | Lixu Lei;Meng Hu;Xiaorui Gao;Yueming Sun.The effect of the interlayer anions on the electrochemical performance of layered double hydroxide electrode materials[J].Electrochimica Acta,20082(2):671-676. |
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