NiCo_2O_4@C纳米复合材料的水热合成及电化学储锂性能
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摘要
采用一步水热法合成了棒状NiCo_2O_4前驱体,并通过调节水热反应过程中碳源(葡萄糖)的加入量以及后续热处理条件(气氛、温度)得到了一系列不同的NiCo_2O_4及NiCo_2O_4@C产物,并对这些产物的结构、形貌及电化学储锂性能进行了测试.结果表明,适当的葡萄糖加入量(0.5 g)配合合理的煅烧条件(400℃,氮气气氛)可以获得倍率性能和循环稳定性兼具的NiCo_2O_4@C纳米复合材料.在100 m A/g的电流密度下,该材料的首次充/放电比容量为634.1/767.2 m A·h/g,对应的库仑效率为82.7%,5周后的放电比容量为650.1 m A·h/g,容量保持率为84.74%,且在300 m A/g的高电流密度下可逆比容量仍可保持在225.9m A·h/g.
Rodlike NiCo_2O_4 precursor was prepored via one-step hydrothermal method and then a series of NiCo_2O_4 and NiCo_2O_4@ C products was prepared by regulating the amount of glucose as well as the calcination conditions such as calcination temperature and atmosphere. The products were characterized by X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,transmission electron microscopy and charge/discharge testing,cyclic voltammetry and electrochemical impedance spectroscopy. The results show that proper amount of glucose(0. 5 g) in conjunction with appropriate post-calcination conditions can produce NiCo_2O_4@ C nanocomposite with good rate capability and cycling stability. At a current density of 100 m A/g,the material demonstrated the charge/discharge capacities of 634. 1/767. 2 m A·h/g,corresponding to a Coulombic efficiency of 82. 7%,and maintained the discharge capacity of 650. 1 m A·h/g after five cycles with a retention rate of 84. 74%. Furthermore,at a higher current density of 300 m A/g,the material could still afford a high reversible capacity of 225. 9 m A·h/g.
Rodlike NiCo_2O_4 precursor was prepored via one-step hydrothermal method and then a series of NiCo_2O_4 and NiCo_2O_4@ C products was prepared by regulating the amount of glucose as well as the calcination conditions such as calcination temperature and atmosphere. The products were characterized by X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,transmission electron microscopy and charge/discharge testing,cyclic voltammetry and electrochemical impedance spectroscopy. The results show that proper amount of glucose(0. 5 g) in conjunction with appropriate post-calcination conditions can produce NiCo_2O_4@ C nanocomposite with good rate capability and cycling stability. At a current density of 100 m A/g,the material demonstrated the charge/discharge capacities of 634. 1/767. 2 m A·h/g,corresponding to a Coulombic efficiency of 82. 7%,and maintained the discharge capacity of 650. 1 m A·h/g after five cycles with a retention rate of 84. 74%. Furthermore,at a higher current density of 300 m A/g,the material could still afford a high reversible capacity of 225. 9 m A·h/g.
引文
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[2]Wang C.,Wang D.L.,Wang Q.Y.,Chen H.J.,Chem.J.Chinese Universities,2010,31(10),2058—2062(王崇,王殿龙,王秋明,陈焕俊.高等学校化学学报,2010,31(10),2058—2062)
[3]Zou Q.,Zai J.T.,Liu P.,Qian X.F.,Chem.J.Chinese Universities,2011,32(3),630—634(邹琼,宰建陶,刘萍,钱雪峰.高等学校化学学报,2011,32(3),630—634)
[4]Li Y.,Han X.B.,Liang J.C.,Leng X.N.,Ye K.Q.,Hou C.M.,Yu K.F.,Chem.Res.Chinese Universities,2015,31(3),332—336
[5]Li L.L.,Cheah Y.L.,Ko Y.W.,Teh P.F.,Wee G.,Wong C.L.,Peng S.J.,Srinivasan M.,J.Mater.Chem.A,2013,1(36),10935—10941
[6]Liu S.N.,Wu J.,Zhou J.,Fang G.Z.,Liang S.Q.,Electrochimica Acta,2015,176,1—9
[7]Liu L.,Zhang H.J.,Yang J.,Mu Y.P.,Wang Y.,J.Mater.Chem.A,2015,3(44),22393—22403
[8]Ma Y.C.,Jiang H.Y.,Liu Q.Z.,Kang W.K.,Shi J.S.,New J.Chem.,2015,39(9),7495—7502
[9]Mo Y.D.,Ru Q.,Chen J.F.,Song X.,Guo L.Y.,Hu S.J.,Peng S.M.,J.Mater.Chem.A,2015,3(39),19765—19773
[10]Mondal A.K.,Su D.,Chen S.Q.,Xie X.Q.,Wang G.X.,ACS Appl.Mater.Interfaces,2014,6(17),14827—14835
[11]Peng L.,Zhang H.J.,Bai Y.J.,Yang J.,Wang Y.,J.Mater.Chem.A,2015,3(44),22094—22101
[12]Shen L.F.,Yu L.,Yu X.Y.,Zhang X.G.,Lou X.W.,Angew.Chem.Int.Ed.,2015,54(6),1868—1872
[13]Wu J.,Mi R.,Li S.M.,Guo P.,Mei J.,Liu H.,Lau W.M.,Liu L.M.,RSC Adv.,2015,5(32),25304—25311
[14]Zhang Y.F.,Ma M.Z,Yang J.,Su H.Q,Huang W.,Dong X.C.,Nanoscale,2014,6(8),4303—4308
[15]Zhou X.Y.,Chen G.H.,Tang J.J.,Ren Y.P.,Yang J.,J.Power Sources,2015,299,97—103
[16]Li G.D.,Xu L.Q.,Zhai Y.J.,Hou Y.P.,J.Mater.Chem.A,2015,3(27),14298—14306
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[18]Li J.F.,Xiong S.L.,Li X.W.,Qian Y.T.,Nanoscale,2013,5(5),2045—2054
[19]Guo L.Y.,Ru Q.,Song X.,Hu S.J.,Mo Y.D.,J.Mater.Chem.A,2015,3(16),8683—8692
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[21]Hu L.L.,Qu B.H.,Li C.C.,Chen Y.J.,Mei L.,Lei D.N.,Chen L.B.,Li Q.H.,J.Mater.Chem.A,2013,1(18),5596—5602
[22]Long C.,Zheng M.T.,Xiao Y.,Lei B.F.,Dong H.W.,Zhang H.R.,Hu H.,Liu Y.L.,ACS Appl.Mater.Interfaces,2015,7(44),24419—24429
[23]Li T.,Li X.H.,Wang Z.X.,Guo H.J.,Li Y.,J.Mater.Chem.A,2015,3(22),11970—11975
[24]Lei Y.,Li J.,Wang Y.Y.,Gu L.,Chang Y.F.,Yuan H.Y.,Xiao D.,ACS Appl.Mater.Interfaces,2014,6(3),1773—1780
[25]Jadhav H.S.,Kalubarme R.S.,Park C.N.,Kim J.,Park C.J.,Nanoscale,2014,6(17),10071—10076
[26]Li B.S.,Feng J.K.,Qian Y.T.,Xiong S.L.,J.Mater.Chem.A,2015,3(19),10336—10344
[27]Nuli Y.N.,Zhang P.,Guo Z.P.,Liu H.K.,Yang J.,Electrochem.Solid-State Lett.,2008,11(5),A64—A67
[28]Huang L.,Zhang W.,Xiang J.W.,Huang Y.H.,Journal of Materiomics,2016,2(3),248—255
[29]Zhang C.F.,Yu J.S.,Chem.Eur.J.,2016,22(13),4422—4430
[30]Li D.L.,Gong Y.N.,Zhang Y.P.,Luo C.Z.,Li W.P.,Fu Q.,Pan C.X.,Scientific Reports,2015,5,12903—12910
[31]Mo Y.D.,Ru Q,Song X,Guo L.Y.,Chen J.F.,Hou X.H.,Hu S.J.,Carbon,2016,109,616—623
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