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电化学(中英文) ›› 1995, Vol. 1 ›› Issue (1): 70-77. 

• 研究论文 • 上一篇    下一篇

LiCoO_2的合成及其在锂蓄电池中的行为

郭鸣凤,杨瑞敏,张泽波,叶劲草   

  1. 天津能源研究所
  • 收稿日期:1995-02-28 修回日期:1995-02-28 出版日期:1995-02-28 发布日期:1995-02-28

Synthesis of Li_xCoO_2 and Its Behaviour in Rechargeable Lithium Battery

Guo Mingfeng;Yang Ruimin;Zhang Zebo;Ye Jincao   

  1. (Tianjin Institute of Power Sources,Tianjin 300381
  • Received:1995-02-28 Revised:1995-02-28 Published:1995-02-28 Online:1995-02-28

摘要: 采用XRD和AAR分析技术,研究了LiCoO_2电极在充电过程、放电过程以及充放电循环过程中晶胞参数变化规律.发现在这些过程中,LiCoO_2晶胞出现规律性的收缩和膨胀;过充电时产物Co_3O_4,导致Li_xCoO_2晶格的破坏;循环过程中晶胞参数C_0值的变化与充电过程相似.各种状态下006峰的变化最敏感.于700℃预热20h后再高温合成的Li_xCoO_2,其006峰得到明显的加强,其循环伏安曲线可逆性很好,第1000次几乎与第一次相同,实验电池100%DOD循环大于270次,AA型锂蓄电池或AA型锂离子蓄电地实验在进行中.

关键词: 锂离子电池, Li_xCoO_2, 晶胞参数

Abstract: The Variations of crystal lattice parameters of Li_xCoO_2 during charge anddischarge have been st ud ied by XRD and AAR spectroscopy.It was found that the Li_xCoO_2 crystalvolume expanded during charge and contracted during discharge.The crystal lattice structure wasbroken because of the formation of Co_3O_4 when deeply charge.The variation of lattice parameter C_0value in cycling process was similar to that in charge process.The variation of 006 peak was the mostsensitive in every case.In case of preheating for 20 hours at 700℃ before operating hightemperature,the 006 peak obtained an enhancement obviously.It has had the good rechargeability inmeasurement of the cyclic voltammograms,the CV curve at 1000th was same as that of first one.This material could have cvcled more than 270 times at 100% DOD.The AA size cells ofrechargeable lithium battery and Li-Ion battery both are being tested now.

Key words: Lithium-ion battery, Li_xCoO_2, Lattice parameter

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