通过 Mn3+ 浓度和占位无序控制高性能 LiNi0.5Mn1.5O4 尖晶石。
High-performance LiNi0.5Mn1.5O4 spinel controlled by Mn3+ concentration and site disorder.
机构信息
Pacific Northwest National Laboratory, Richland, WA 99352, USA.
出版信息
Adv Mater. 2012 Apr 24;24(16):2109-16. doi: 10.1002/adma.201104767. Epub 2012 Mar 19.
The complex correlation between Mn(3+) ions and the disordered phase in the lattice structure of high voltage spinel, and its effect on the charge transport properties, are revealed through a combination of experimental study and computer simulations. Superior cycling stability is achieved in LiNi(0.45)Cr(0.05)Mn(1.5)O(4) with carefully controlled Mn(3+) concentration. At 250th cycle, capacity retention is 99.6% along with excellent rate capabilities.
通过实验研究和计算机模拟相结合的方法，揭示了 Mn(3+)离子与高压尖晶石晶格结构中无序相之间的复杂关系及其对电荷输运性能的影响。通过精心控制 Mn(3+)浓度，LiNi(0.45)Cr(0.05)Mn(1.5)O(4)实现了优异的循环稳定性。在第 250 次循环时，其容量保持率为 99.6%，同时还具有出色的倍率性能。
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