醇-水热法制备钴镍双金属氢氧化物及其电化学性能研究
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摘要
以六水合氯化钴、六水合氯化镍和六次甲基四胺为原料,通过引入乙醇溶剂,利用醇-水热法合成钴镍双金属氢氧化物。采用扫描电子显微镜、电化学工作站等对所制材料的形貌及电化学性能进行表征。从扫描电子显微镜可以看出,利用醇-水热法合成的钴镍双金属氢氧化物具有较薄的片状结构;电化学测试结果表明合成的双金属氢氧化物具有较优异的电化学性能,在电流密度为1A/g时,其比电容达到586.7F/g。
Co-Ni layered double hydroxides were synthesized via solvo-thermal method using cobalt chloride and nickel chloride as cobalt and nickel sources with hexamethylenetetramine as the precipitant and ethanol as the template.The morphology of the samples was characterized by scanning electron microscopy and the electrochemical properties were performed by electrochemical workstation.The results indicated that Co-Ni layered double hydroxides had thinner sheet structure and more excellent electrochemical properties with a specific capacitance 586.7 F/g under a current density of 1 A/g.
Co-Ni layered double hydroxides were synthesized via solvo-thermal method using cobalt chloride and nickel chloride as cobalt and nickel sources with hexamethylenetetramine as the precipitant and ethanol as the template.The morphology of the samples was characterized by scanning electron microscopy and the electrochemical properties were performed by electrochemical workstation.The results indicated that Co-Ni layered double hydroxides had thinner sheet structure and more excellent electrochemical properties with a specific capacitance 586.7 F/g under a current density of 1 A/g.
引文
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[4]Wang K,Xu M,Gu Y,et al.Symmetric supercapacitors using urea-modified lignin derived N-doped porous carbon as electrode materials in liquid and solid electrolytes[J].Journal of Power Sources,2016,332:180-186.
[5]田晓冬,李肖,杨桃,等.双金属氧化物和复合材料的合成及其在超级电容器中的应用进展[J].无机材料学报,2017,32(5):459-468.
[6]刘双宇,巩学海,徐丽,等.介孔碳/石墨烯复合材料的制备及在超级电容器中的应用[J].硅酸盐学报,2017,45(2):312-316.
[7]Zhang X,Zhang Z,Pan H,et al.A portable high-efficiency electromagnetic energy harvesting system using supercapacitors for renewable energy applications in railroads[J].Energy Conversion &Management,2016,118:287-294.
[8]Yang W,Feng Y Y,Xiao D,et al.Fabrication of microporous and mesoporous carbon spheres for high-performance supercapacitor electrode materials[J].International Journal of Energy Research,2015,39(6):805-811.
[9]Zhao C,Wang Q,Zhang H,et al.Two-dimensional titanium carbide/RGO composite for high-performance supercapacitors[J].ACS Applied Materials &Interfaces,2016,8(24):15661.
[10]Yang W,Feng Y Y,Wang N,et al.Facile microwave-assisted synthesis of sheet-like cobalt hydroxide for energy-storage application:effect of the cobalt precursors[J].Journal of Alloys and Compounds,2015,644:836-845.
[11]严琳,孔惠,李在均.3D石墨烯/镍铝层状双金属氢氧化物的制备及超级电容性能[J].化学学报,2013,71(5):822-828.
[12]冯艳艳,黄宏斌,张心桔,等.高性能镍钴层状双金属氢氧化物的制备及其电化学性能研究[J].物理学报,2017,66(24):248202-248208.
[13]李宫,陈昆峰,金京一,等.La3+掺杂NiCo层状双金属氢氧化物纳米片的合成及其电化学性能[J].应用化学,2017,34(1):71-75.
[14]Zhang L,Zhao K,Luo Y,et al.Acetylene black induced heterogeneous growth of macroporous CoV2O6nanosheet for highrate pseudocapacitive lithium-ion battery anode[J].ACS Applied Materials &Interfaces,2016,8(11):7139.
[15]Bao L,Zang J,Li X.Flexible Zn2SnO4/MnO2core/shell nanocable-carbon microfiber hybrid composites for high-performance supercapacitor electrodes[J].Nano Letters,2011,11(3):1215.
[16]Zhang Z,Wang Q,Zhao C,et al.One-step hydrothermal synthesis of 3Dpetal-like Co9S8/RGO/Ni3S2composite on nickel foam for high-performance supercapacitors[J].ACS Applied Materials &Interfaces,2015,7(8):4861-4868.
[17]Sun X,Wang G,Sun H,et al.Morphology controlled high performance supercapacitor behaviour of the Ni-Co binary hydroxide system[J].Journal of Power Sources,2013,238(28):150-156.
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[19]牛玉莲,金鑫,郑佳,等.石墨烯/钴镍双金属氢氧化物复合材料的制备及电化学性能研究[J].无机化学学报,2012,28(9):1878-1884.