采用沉淀法和水热法,合成了不同形貌的磷酸铁前驱体,并用碳热还原法得到LiFePO4/C正极材料.探讨了磷酸铁前驱体形貌特征对合成的磷酸铁锂电化学性能的影响程度.用XRD和SEM对产物物相结构、表观形貌进行了表征和分析.结果表明,水热合成的时间越长,磷酸铁的结晶性越好,趋于球形,电化学性能越好;但反应温度达180℃时,形貌趋向于椭圆,放电比容量反而较高.不同形貌的磷酸铁制备出的磷酸铁锂均为橄榄石结构,物相均一;不同形貌磷酸铁制备的磷酸铁锂正极材料电化学性能各异.磷酸铁形貌对磷酸铁锂正极材料电化学性能有影响,但不是决定因素.
参考文献
| [1] | Padhi AK.;Goodenough JB.;Nanjundaswamy KS. .PHOSPHO-OLIVINES AS POSITIVE-ELECTRODE MATERIALS FOR RECHARGEABLE LITHIUM BATTERIES[J].Journal of the Electrochemical Society,1997(4):1188-1194. |
| [2] | A. Yamada;S.C. Chung;K. Hinokuma .Optimized LiFePO_4 for Lithium Battery Cathodes[J].Journal of the Electrochemical Society,2001(3):A224-A229. |
| [3] | Zhipeng Ma;Guangjie Shao;Guiling Wang .Electrochemical performance of Mo-doped LiFePO4/C composites prepared by two-step solid-state reaction[J].Ionics,2013(3):437-443. |
| [4] | S. Franger;C. Bourbon;F. Le Cras .Optimized lithium Iron Phosphate for High-Rate Electrochemical Applications[J].Journal of the Electrochemical Society,2004(7):A1024-A1027. |
| [5] | Bing Zhao;Yong Jiang;Haijiao Zhang;Haihua Tao;Mingyang Zhong;Zheng Jiao .Morphology and electrical properties of carbon coated LiFePO_4 cathode materials[J].Journal of Power Sources,2009(1):462-466. |
| [6] | Rui Rui Zhao;Li Cai Zhu;Zhen Ze Huang .An investigation on the performance of LiFePO4/C derived from various FePO4[J].Ionics,2013(4):581-588. |
| [7] | Kerun Yang;Zhenghua Deng;Jishuan Suo .Synthesis and characterization of LiFePO_4 and LiFePO_4/C cathode material from lithium carboxylic acid and Fe~(3+)[J].Journal of Power Sources,2012(Mar.1):274-279. |
| [8] | Shaoying Weng;Zeheng Yang;Qiang Wang .A carbothermal reduction method for enhancing the electrochemical performance of LiFePO4/C composite cathode materials[J].Ionics,2013(2):235-243. |
| [9] | Qiuming Wang;Dianlong Wang;Bo Wang .Modified carbothermal synthesis and electrochemical performance of LiFePO4/C composite as cathode materials for lithium-ion batteries[J].Ionics,2013(2):245-252. |
| [10] | K. S. Park;J. T. Son;H. T. Chung;S. J. Kim;C. H. Lee;H. G. Kim .Synthesis of LiFePO_4 by co-precipitation and microwave heating[J].Electrochemistry communications,2003(10):839-842. |
| [11] | Oi Wang;SiXu Deng;Hao Wang.Hydrothermal synthesis of hierarchical LiFePO_4 microspheres for lithium ion battery[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2013:69-74. |
| [12] | Rui-Rui Zhao;Bing-Yan Lan;Hong-Yu Chen .Hydrothermal synthesis and properties of manganese-doped LiFePO4[J].Ionics,2012(9):873-879. |
| [13] | Akira Kuwahara;Shinya Suzuki;Masaru Miyayama .Hydrothermal synthesis of LiFePO_4 with small particle size and its electrochemical properties[J].Journal of electroceramics,2010(2):69-75. |
| [14] | Yi-Ping Liang;Chia-Chen Li;Wen-Jing Chen;Jyh-Tsung Lee.Hydrothermal synthesis of lithium iron phosphate using pyrrole as an efficient reducing agent[J].Electrochimica Acta,2013:763-769. |
| [15] | Seung-Ah Hong;Su Jin Kim;Kyung Yoon Chung.Continuous synthesis of lithium iron phosphate (LiFePO4) nanoparticles in supercritical water: Effect of mixing tee[J].The Journal of Supercritical Fluids,2013:70-79. |
| [16] | 孙玉霞,夏钊,刘红日,熊襄玉,周勇,余画.改进水热法制备BiFeO3粉体及其磁性研究[J].人工晶体学报,2012(02):535-538,543. |
| [17] | 张旭东,张学广,何文,李海明,毕志英,王卓.介孔球形LiFePO4/C原位复合材料制备与表征[J].人工晶体学报,2013(04):712-715. |
| [18] | Yan Lin;Jianbo Wu;Weiping Chen .Enhanced electrochemical performance of LiFePO4/C prepared by sol-gel synthesis with dry ball-milling[J].Ionics,2013(2):227-234. |
| [19] | Zhang, X.;He, W.;Sun, C.;Ma, J.;Yuan, J.;Du, X..High-performance mesoporous LiFePO_4 from Baker's yeast[J].Colloids and Surfaces, B. Biointerfaces,2013:114-120. |
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