化学学报 ›› 1994, Vol. 52 ›› Issue (8): 763-766. 上一篇    下一篇

研究论文

锂在[Mn~2O~4]中的电化学嵌入反应I.热力学性质

余爱水;吴浩青   

  1. 复旦大学化学系
  • 出版日期:1994-08-15 发布日期:1994-08-15

The electrochemical intercalation reaction of lithium into spinel phase [Mn~2O~4] I. thermodynamic behavior

YU AISHUI;WU HAOQING   

  • Online:1994-08-15 Published:1994-08-15

锂嵌入[Mn~2O~4]晶格形成嵌合物Li~xMn~2O~4。通过对不同温度(20~45℃)下的Li/Li~xMn~2O~4电池的库仑滴定曲线[EmF(x)]的测定, 可以求得该嵌入过程的嵌入熵、焓和自由能等热力学函数。在x<1.5时, 表现为很高的偏摩尔自由能, 在x=1/2和x=1时, 嵌入熵和焓表现为不连续性。热力学函数值与Li~xMn~2O~4的晶体结构关联。

关键词: 热力学性质, 晶体结构, 锂, 嵌入反应, 四氧化二锰

Thermodn. of Li intercalation reactions into spinel phase phase [Mn2O4] were investigated by coulombic titration with Li/LixMn2O4 intercalation cell. The functions, DG.DH, DS, were derived from the emf.(x) data and are in good agreement with the structure of [Mn2O4].

Key words: THERMODYNAMIC PROPERTIES, CRYSTAL STRUCTURE, LITHIUM, INTERCALATION REACTION

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