采用化学共沉淀法制备球形前驱体Ni0.7Co0.15Mn0.15(OH)2,将其与LiOH·H2O充分混合后高温烧结制备出锂离子电池正极材料球形LiNi0.7Co0.15Mn0.15O2,用X射线衍射(XRD)、扫描电镜(SEM)、热重-差热分析(TG/DSC)以及恒电流充放电测试对样品进行表征,研究了烧结温度对产物的形貌和电化学性能的影响.结果表明,在750℃合成的LiNi0.7Co0.15Mn0.15O2物相单一无杂相,具有标准的α-NaFeO2晶型,为层状嵌锂复合氧化物.SEM测试显示,产物为球形且球形度较好,颗粒粒度均一,分布较窄,平均粒径在10μm左右.在3.0-q.3 V、0.2C充放电条件下,25℃其初始放电容量高达185.2 mA·h/g,30轮循环后容量保持率达到98.32%.可见球形LiNi0.7Co0.15Mn0.15O2显示了较高的首轮放电容量以及良好的循环性能,表现出较好的电化学性能.
参考文献
| [1] | TANG Aidong,WANG Hmyan,HUANG Kelong,TAN Bing,HUANG Xiaoling,Layered Li-N-Co-Mn-O as Cathode Materials for Lithium Ion Battery,Progress in chemistry,19(9),1313(2007)(唐爱东,王海燕,黄可龙,谭斌,王晓玲,锂离子电池正极材料层状Li-Ni-Co-Mn-O的研究,化学进展,19(9),1313(2007)) |
| [2] | PAN Sizhong,CHEN Meng,NIU Shaojun,SONG Xiaona,Synthesis and property of Al2O3 modified LiNi0.8Co0.2O2as cathode for Li-ion battery,Materials Science and Engineering of Powder Metallurgy,12(4),254(2007)(潘思仲,陈猛,牛少军,宋晓娜,Al2O3包覆LiNi0.8Co0.2O2正极材料及其电化学性能,粉末冶金材料科学与工程,12(4),254(2007)) |
| [3] | Li Juan,Shi Pengfei,Gno Rui,Synthesis and electrochemical characterization of layered LiNi1/3Co1/3Mn1/3O2cathode materials for Li-ion batteries.New chemical materials,35(8),75(2007)(李娟,史鹏飞,郭瑞,锂离子电池正极材料LiNi1/3Co1/3Mn1/3O2的合成及性能研究,化工新型材料,35(8),75(2007)) |
| [4] | R.Moshtev,P.Zlatllova,I.Bakalova,S.Vassilev,Synthesis,XRD characterization,and cycling performance of cobalt doped lithium nickelates.Journal of Power Sources,112(1),30(2002) |
| [5] | J.Kim,B.H.Kim,V.H.Baik,P.K.Chang,H.S.Park,K.Amine,Effect of(Al,Mg)substitution in LiNiO2 electrode for lithium batteries,Journal of Power Sources,158(1),641(2006) |
| [6] | Ying Jierong,Wan Chunrong,Jiang Changyin,Li Yangxing,Preparation and characterization of high-density spherical LiNi0.8Co0.2O2 cathode material for lithium secondary batteries,Journal of Power Sources,99,78(2001) |
| [7] | Wu Shehuang,Yang Chiwei,Preparation of LiNi0.8Co0.2O2-based cathode materials for lithium batteries by a co-precipitation method,Journal of Power Sources,146,270-274(2005) |
| [8] | K.S.Tan,M.V.Reddy,G.V.Subba Rao,B.V.R.Chowdari,Effect of AlPO4-coating on cathodic behavior of Li(Ni0.8Co0.2)O2,Journal of Power Sources,141,129(2005) |
| [9] | M.Yoshio,H.Noguchi,J.Itoh,M.Okada,Takashi Mouri,Preparation and properties of LiCoyMnxNi1-x-yO2 as a cathode for lithium ion batteries.Journal of Power Sources,90,176(2000) |
| [10] | Yao Chen,G.X.Wang,K.Konstantinov,H.K.Liu,S.X.Dou,Synthesis and characterization of LiCoxMnyNi1-x-yO2 as a cathode material for secondary lithium batteries,Journal of Power Sources,119,184(2003) |
| [11] | Myung-Hyoon Kim,Ho-Suk Shin,Dongwook Shin,Yang-Kook Sun,Synthesis and electrochemical propertiesof Li[Ni0.8Co0.1Mn0.1]O2 and Li[Ni0.8Co0.2]O2 via coprecipitation,Journal of Power Sources,159,1328(2006) |
| [12] | YING Jierong,GAO Jian,JIANG Changyin,WAN Chunrong,HE Xiangming,Research and development of preparing spherical cathode materials for lithium ion batteries by controlled crystallization method,Journal of Inorganic Materials,21(2),291(2906)(应皆荣,高剑,姜长印,万春荣,何向明,控制结晶法制备球形锂离子电池正极材料的研究进展,无机材料学报,21(2),291(2006)) |
| [13] | Anders Lundblad,Bill Bergman,Synthesis of LiCo2 starting from carbonate precursors Ⅰ.The reaction mechanisms,Solid State Ionics,96,173(1997) |
| [14] | LI Hongjian,CHEN Gang,ZHANG Bin,XU Jin.Advanced elcatrochemical performance of Li[Ni(1/3-x)FexCo1/3Mn1/3]O2 as cathode materials for lithium-ion battery,Solid State Communications,146,115(2008) |
| [15] | Shaju K M,Subba G V R,Chowdari B V R.Performance of layered Li(Ni1/3 Co1/3 Mn1/3)O2 as cathode for Li-ion batteries,Electrochimica Acts,48(2),145(2002) |
| [16] | DING Yanhuai,ZHANG Ping,Gao Deshu,Synthesis and electrochemical properties of layered Li[Ni1/3oCo1/3 Mn1/3]0.96Ti0.04O1.96F0.04 as cathode material for lithium-ion batteries,Journal of Alloys and Compounds,456,344(2008) |
| [17] | W.Lia,J.N.Reimers,J.R.Dahn,In situ X-ray diffraction and electrochemical studies of Li1-xNiO2,Solid State Ionics,67,123(1993) |
| [18] | Seung-Taek Myung,Shinichi Komaba,Naoaki Kumagai,Synthetic optimization of orthorhombic LiMnO2 by emulsion-drying method and cycling behavior as cathode material for Li-ion battery,Solid State Ionics,150,199(2002) |
| [19] | HE Hui,CHENG Xuan,ZHANG Ying,Phase transformation of LiNi0.75Co0.25O2,Materials Science and Engineering B,133,8(2006) |
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