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采用固相法合成了掺杂Zn2+的锂离子电池负极材料Li4-2xZn3xTi5-xO12(0≤3x≤0.2).对材料进行了SEM、XRD、激光粒度分析、振实密度、循环伏安测试及恒电流充放电测试.Zn2+的掺杂未改变材料的晶体结构,但使材料的振实密度有了明显提高,达到了1.56g/cm3.实验结果表明,Zn2+的掺杂改善了Li4Ti5O12的电化学性能,降低了电极的极化,提高了Li4Ti5O12的循环稳定性;当各元素摩尔比为n(Li):n(Zn):n(Ti)=3.933:0.100:4.967时,材料的电化学性能较优,1C首次放电比容量可达到151mAh/g,经过60次循环后,放电容量保持在138mAh/g.

参考文献

[1] Ohzuku T.;Yamamoto N.;Ueda A. .ZERO-STRAIN INSERTION MATERIAL OF LI[LI1/3TI5/3]O-4 FOR RECHARGEABLE LITHIUM CELLS[J].Journal of the Electrochemical Society,1995(5):1431-1435.
[2] Kiyoshi N;Ryosuke N;Tomoko M et al.[J].Journal of Power Sources,2003,117:131-136.
[3] Kavan L;Gratzel M .[J].Electrochemical and Solid State Letters,2002,5-2:A39-A42.
[4] Kunimitsu K;Yasuhiko T;Norihito K et al.[J].Journal of Physics and Chemistry of Solids,2008,69:1454-1456.
[5] Gao J;Ying J R;Jiang C Y et al.[J].Journal of Power Sources,2007,166:255-259.
[6] Ge H;Li N;Li DY;Dai CS;Wang DL .Study on the effect of Li doping in spinel Li4+xTi5-xO12 (0 <= x <= 0.2) materials for lithium-ion batteries[J].Electrochemistry communications,2008(7):1031-1034.
[7] Toru T;Hideo Y;Masanori Y .[J].Journal of Power Sources,2006,162:813-817.
[8] Wolfenstine J;Allen J L .[J].Journal of Power Sources,2008,180:582-585.
[9] Kallel W;Bouattour S;Vieira Ferreira L F et al.[J].Materials Chemistry and Physics,2009,114:304-308.
[10] Shenouda A Y;Murali K R .[J].Journal of Power Sources,2008,176:332-339.
[11] Zhao H L;Li Y;Zhu Z M et al.[J].Electrochimica Acta,2008,53:7079-7083.
[12] Hao Y J;Lai Q Y;Lu J Z et al.[J].Ionics,2007,13:369-373.
[13] Huang S H;Wen Z Y;Lin B et al.[J].Journal of Alloys and Compounds,2008,457:400-403.
[14] Huang SH;Wen ZY;Zhu XJ;Gu ZH .Preparation and electrochemical performance of Ag doped Li4Ti5O12[J].Electrochemistry communications,2004(11):1093-1097.
[15] Pierre K;Aureˊlie G;Manfred W et al.[J].Journal of Power Sources,2003,119-121:626-630.
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