欢迎登录材料期刊网

材料期刊网

高级检索

F掺杂可以提高锂离子电池正极材料LiMn2O4的初始容量,但使材料的循环性能变差.其原因是F的掺入降低了Mn的平均价态,Mn3+的量增加,提高了材料的初始容量,但Mn3+量的增加也加剧了Mn的溶解和Jahn-Teller畸变,使材料的循环性能变差.F掺杂虽然降低了材料的循环性能,但提高了材料的初始容量,为改善阳离子掺杂方法的不足提供了一条可能的解决途径.

参考文献

[1] Pyun S;Choi Y M et al.[J].Journal of Power Sources,1997,68:593.
[2] Ohzuku T;Takeda S.[J].Journal of Power Sources,1999:90.
[3] Li G;Ikuta H;Uchidea T et al.[J].Journal of the Electrochemical Society,1996,144:178.
[4] Robertson AD.;Averill WF.;Howard WF.;Lu SH. .M3+-MODIFIED LIMN2O4 SPINEL INTERCALATION CATHODES .1. ADMETAL EFFECTS ON MORPHOLOGY AND ELECTROCHEMICAL PERFORMANCE[J].Journal of the Electrochemical Society,1997(10):3500-3505.
[5] Lourdes H;Morales J et al.[J].Solid State Ionics,1999,118:179.
[6] Ein-Eli Y.;Lu SH.;Mukerjee S.;McBreen J.;Vaughey JT. Thackeray MM.;Howard WF. .LiMn2-xCuxO4 spinels (0.1 <= x <= 0.5): A new class of 5 V cathode materials for Li batteries - I. Electrochemical, structural, and spectroscopic studies[J].Journal of the Electrochemical Society,1998(4):1238-1244.
[7] Aydinol MK.;Ceder G.;Cho K.;Joannopoulos J.;Kohan AF. .AB INITIO STUDY OF LITHIUM INTERCALATION IN METAL OXIDES AND METAL DICHALCOGENIDES[J].Physical Review.B.Condensed Matter,1997(3):1354-1365.
[8] Liu Y;Fjujiwara T et al.[J].Electrochimica Acta,2001,46:1151.
[9] Amatucci G G;Pereira N.[J].Journal of Power Sources,1999:39.
[10] Palacin M R;Amatucci G G.[J].Journal of Power Sources,1999:627.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%