High-Performance LiNi0.5Mn1.5O4 Spinel Controlled by Mn3+ Concentration and Site Disorder

The complex correlation between Mn3+ 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 LiNi0.45...

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Veröffentlicht in:	Advanced Materials, 24(16):2109-2116 24(16):2109-2116, 2012-04, Vol.24 (16), p.2109-2116
Hauptverfasser:	Xiao, Jie, Chen, Xilin, Sushko, Peter V., Sushko, Maria L., Kovarik, Libor, Feng, Jijun, Deng, Zhiqun, Zheng, Jianming, Graff, Gordon L., Nie, Zimin, Choi, Daiwon, Liu, Jun, Zhang, Ji-Guang, Whittingham, M. Stanley
Format:	Artikel
Sprache:	eng
Schlagworte:	ANNEALING cathode cathode, high voltage spinel,lithium ion batteries,energy storage Electric Power Supplies Electrochemistry Electrodes ELECTRON DIFFRACTION energy storage Environmental Molecular Sciences Laboratory high voltage spinel lithium ion batteries Manganese Compounds - chemistry MATERIALS SCIENCE Models, Molecular Molecular Conformation Nickel - chemistry SPINELS STABILITY structure-property relationship X-RAY DIFFRACTION
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Zusammenfassung:	The complex correlation between Mn3+ 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 LiNi0.45Cr0.05Mn1.5O4 with carefully controlled Mn3+ concentration. At 250th cycle, capacity retention is 99.6% along with excellent rate capabilities.
ISSN:	0935-9648 1521-4095
DOI:	10.1002/adma.201104767