采用1,2-丙二醇作为表面活性剂,在水热反应中合成正极材料LiFePO4.用XRD、SEM、粒径分布测试和恒电流充放电方法,分别研究了1,2-丙二醇对LiFePO4的结构、形貌、粒径和电化学性能的影响.结果表明:加入适量的丙二醇不改变LiFePO4的橄榄石结构,但可使材料的结晶粒度变小,粒径分布变得均匀;当丙二醇加入量为10 mL时,得到的LiFePO4平均粒径d(0.5)=1.128 μm,粒径分布范围为0.316～6.607 μm;该材料在0.2C倍率下的首次放电比容量为144 mAh/g,循环性能良好.
参考文献
| [1] | 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. |
| [2] | MacNeil D d;Lu Z H et al.A comparison of the electrode/electrolyte reaction at elevated temperatures for various Li-ion battery cathodes[J].Journal of Power Sources,2002,108(1-2):8-14. |
| [3] | A.S.Andersson;J.O.Thomas .The source of first-cycle capacity loss in LiFePO_4[J].Journal of Power Sources,2001(0):498-502. |
| [4] | Thackeray M .Lithium-ion batteries-An unexpected conductor[J].Nature Materials,2002,1(02):81-82. |
| [5] | 谭显艳,胡国荣,高旭光,彭忠东,陈召勇,禹筱元.掺杂Mg的LiFePO4电化学性能研究[J].电池,2004(05):344-345. |
| [6] | 胡成林,代建清,戴永年,易惠华.Ti离子掺杂对LiFePO4材料性能的影响[J].材料导报,2007(07):147-149. |
| [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] | Lu C H;Lin S W .[J].Journal of Power Sources,2001,98:458-463. |
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