以Fe2O3为铁源,NH4H2PO4为磷源,Li2CO3为锂源,蔗糖为碳添加剂,应用碳热还原一步烧结法制备了LiFePO4/C复合粉体材料,系统的研究了烧结温度、烧结时间和锂铁比对样品电化学性能的影响.研究结果表明,对电化学性能影响因素最大的是烧结温度、其次是锂铁比,最后是烧结时间.当烧结温度为700℃、锂铁比为1.00、烧结时间为12h时样品所得的电化学性能最佳,它在0.1C,0.5C和1.0C倍率下的首次放电比容量分别为130.1,118.2和105.6mAh·g-1,经20次循环后,不同倍率下样品的容量的保持率分别为99.8％,98.9％和97.5％.
参考文献
| [1] | Prosini P P;Zane D;PasQuali M;Silvera Scaccia,Maria Carewska,Francesco Cardellini,Mauro Pasqualib .Synthesis and characterization of amorphous hydrated FePO4 and its electrode performance in lithium batterie[J].Journal of the Electrochemical Society,2002,149(03):A297. |
| [2] | Masaya Takahashi;Shinichi Tobishima;Koji Takei .Characteriazation of LiFePO_4 as the cathode material for rechargeable lithium batteries[J].Journal of Power Sources,2001(0):508-511. |
| [3] | 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. |
| [4] | 陈宇,王忠丽,于春洋,夏定国,吴自玉.掺杂Mo的LiFePO4正极材料的电化学性能[J].物理化学学报,2008(08):1498-1502. |
| [5] | 卢俊彪,唐子龙,张中太,金永拄.镁离子掺杂对LiFePO4/C材料电池性能的影响[J].物理化学学报,2005(03):319-323. |
| [6] | Belharouak I;Johnson C;Amine K .Synthesis and electrochemical analysis of vapor-deposited carbon-coated LiFePO4[J].Electrochemistry communications,2005(10):983-988. |
| [7] | A. Yamada;S.C. Chung;K. Hinokuma .Optimized LiFePO_4 for Lithium Battery Cathodes[J].Journal of the Electrochemical Society,2001(3):A224-A229. |
| [8] | Huang H;Yin S C;Naar L F .Approaching theoretical capacity of LiFePO4 at room temperature at high rates[J].Electrochemical and Solid State Letters,2001,4(10):A170. |
| [9] | 谢辉.橄榄石型磷酸铁锂的研究进展[J].广东化工,2009(03):35-39,118. |
| [10] | Bauer E M;Bellitto C;Righini G;Pasquali M,Dell'Era A,Prosini P P .A versatile method of preparation of carbon-rich LiFePO4:a promising cathode material for Li-ion batteries[J].Journal of Power Sources,2005,146(1-2):544. |
| [11] | Takahashi M.;Tobishima S.;Takei K.;Sakurai Y. .Reaction behavior of LiFePO4 as a cathode material for rechargeable lithium batteries[J].Solid state ionics,2002(3/4):283-289. |
| [12] | Belharouak I;Johnson C;Amine K .Synthesis and electrochemical analysis of vapor-deposited carbon-coated LiFePO4[J].Electrochemistry communications,2005(10):983-988. |
| [13] | Franger S;Bourbon C;Cres F L .Optimized lithium iron phosphate for high-rate electrochemical application[J].Journal of the Electrochemical Society,2004,151(07):A1024. |
| [14] | Mi C H;Zhao X B;Cao G S;Tu J P .In situ synthesis and properties of carbon-coated LiFePO4 as 1i-ion battery cathodes[J].Journal of the Electrochemical Society,2005,152(03):A483. |
| [15] | Barker J;Saidi M Y;Swoyer J L .Lithium iron(Ⅱ)phosphoolivines prepared by a novel carbothermal reduction method[J].Journal of the Electrochemical Society,2003,6(03):A53. |
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