High-performance Li-ion Battery based on Cr-Substituted Lithium Manganite and Lithium Titanate Spinels: Influence of Mass Balance on its Electrochemistry

锰铁矿 锂(药物) 电化学 钛酸锂 材料科学 离子 磷酸钒锂电池 锂离子电池 电池(电) 钛酸酯 无机化学 化学 复合材料 物理化学 陶瓷 电极 凝聚态物理 热力学 物理 有机化学 功率(物理) 内分泌学 铁磁性 医学
作者
Mohamed Aklalouch,José Manuel Amarilla,J. M. Rojo,Abderrahim Solhy,R.M. Rojas,Ismae͏̈l Saadoune
出处
期刊:Energy technology [Wiley]
卷期号:5 (5): 725-731 被引量:6
标识
DOI:10.1002/ente.201600462
摘要

Abstract The influence of mass balance in the LiCr 0.2 Ni 0.4 Mn 1.4 O 4 //Li 4 Ti 5 O 12 (LCrNMO//LTO) full cell on its electrochemical performance at different rates is described. The effect of the variation of the molar fraction of LTO to LCrNMO ( χ ) at different rates is described in detail. The full cell showed a reversible working potential at about 3 V. For every rate tested, the discharge capacity, normalized to total mass of both electrode materials ( Q dch ), reached a maximum value approximately at the stoichiometric value of χ =1. When χ <1, Q dch is limited by an incomplete electrochemical reaction of the LCrNMO cathode and when χ >1 Q dch decreases due to the increase in the total weight of active electrode materials. When the discharge rates were increased to ≥1 C (1 C=147.5 mA g −1 or 0.260 mA cm −2 ), the maximum Q dch delivered by the full cell was shifted slightly beyond the stoichiometry ( χ =1.1). Furthermore, the LCrNMO//LTO full cell exhibited an outstanding ultralong cycling behavior: with a capacity retention of 93 % after 1000 cycles. Its cyclability is as high as 99.994 %. The LiCrNMO//LTO full cell is a promising lithium‐ion battery for practical applications, especially for plug‐in hybrid electric vehicles, for which a long cycle life and reasonable power are required. However, it is demonstrated that the optimization of anode to cathode materials is one of the most important parameters to take into account to achieve high energy and power densities.
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