Comparative study of solid-state redox reactions of LiCo1/4Ni3/4O2 and LiAl1/4Ni3/4O2 for lithium-ion batteries
Comparative study of solid-state redox reactions of LiCo1/4Ni3/4O2 and LiAl1/4Ni3/4O2 for lithium-ion batteries
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锂离子电池LiCo1/4Ni3/4O2和LiAl1/4Ni3/4O2固态氧化还原反应对比研究
DOI：
10.1016/s0013-4686(99)00200-5
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Toshiyuki Aoki
中科院分区：
文献类型：
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作者：
T. Ohzuku;K. Nakura;Toshiyuki Aoki
采用XRD和电化学方法对LiCo1/4Ni3/4O2和LiAl1/4Ni3/4O2的固态氧化还原反应进行了对比研究。 XRD 检查表明，两个样品的反应均以单相进行。 LiCo1/4Ni3/4O2 或 LiAl1/4Ni3/4O2 的 MeO2 层间距离变化与 Li1−xMeO2（Me=Ni、Co1/4Ni3/4 或 Al1/4Ni3/4）中 0<x<3/4 区域的 LiNiO2 几乎相同。测量了作为 x 函数的可逆电势，并通过使用简单的方程描述氧化还原电势来表征锂插入反应中涉及的固态氧化还原反应。根据我们的结果，在 LiNiO2 中用铝替代镍可使主要源自镍物质的固态氧化还原电位水平提高约 0.1 V，而钴的替代不会影响该范围内的固态氧化还原电位。由此讨论了LiCo1/4Ni3/4O2和LiAl1/4Ni3/4O2固态电化学反应的异同。
Comparative study of the solid-state redox reactions of LiCo1/4Ni3/4O2and LiAl1/4Ni3/4O2was carried out by XRD and electrochemical methods. XRD examinations indicated that the reactions proceeded in single phase for both samples. The change in interlayer distance between MeO2-sheets for LiCo1/4Ni3/4O2or LiAl1/4Ni3/4O2was almost the same as that for LiNiO2in the region 0<x<3/4 in Li1−xMeO2(Me=Ni, Co1/4Ni3/4, or Al1/4Ni3/4). Reversible potentials as a function of x were measured and the solid-state redox reactions involving in the lithium insertion reactions were characterized by using simple equations to describe the redox potentials. According to our results, substitution of aluminum for nickel in LiNiO2raised the levels of solid-state redox potentials primarily derived from nickel species by about 0.1 V, while the substitution of cobalt did not affect the solid-state redox potentials in that range. Differences and similarities between the solid-state electrochemical reactions of LiCo1/4Ni3/4O2and LiAl1/4Ni3/4O2were discussed therefrom.