Electrochemical properties of composite
Contents
形式训练说
⏹Introduction
⏹
Summary
⏹Li 3V 2(1‐x)Fe 3x (PO 4)3and Li 3V 2‐y Fe y (PO 4)3⏹LiFe 1‐x V x PO 4and LiFe 1‐3y/2V y PO 4
⏹Li 0.97V 0.02(PO 4)3/Li 3V 1.95Fe 0.05(PO 4)3
Introduction
LiFePO4has been recognized as one of the most promising cathode material of lithium ion batteries for power applications. Advantages
1.High specific capacity and excellent cycle ability
刘保兴2.High rervation of iron on earth
一物多玩3.Non oxygen releasing
4.High reaction initiation temperature with electrolytes
5.No toxicity
Disadvantages
结束与开始1.Low Li+ion diffusivity and electronic
conductivity安全在我心
2.Low taping and packing densities大学中庸
Approaches to Improve the Rate Performance
3.Doping with cations to increa the diffusivity of Li +and electronic conductivity.
猫武士火星
1. Surface coating with thin layers of carbon on LiFePO 4particles .
2. Reducing particle size of LiFePO 4powders.
At Li +sites: Na + [1], Cu 2+ [2], Cr 3+ [3], Ti 4+ [4], Nd 5+ [5]. Nb 5+ [6], Mo 3+ [7], Mg 2+ [7],
La 3+ [9], Y 3+ [10].
At Fe 2+sites: Cu 2+ [11], Zn 2+ [12], Ni 2+ [13,14], Mn 2+ [15‐17], Al 3+ [18,19], Co 3+ [20,21],
Cr 3+ [22], Mg 2+[23], Ti 4+ [24], Zr 4+ [25], V 3+ [26‐30].
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y t i s双孢蘑菇
LFVP 4.04.2
4.4i (b)
4.0
4.2
4.4(a)
