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Corresponding Author

Yong-gao XIA(xiayg@nimte.ac.cn);
Zhao-ping LIU(liuzp@nimte.ac.cn)

Abstract

Olivine-structured lithium manganese phosphate (LiMnPO4) has the following advantages: excellent thermal stability, low cost, high safety and environmental benignity. Importantly, the theoretical energy density of LiMnPO4 is about 20% higher than that of commercialized LiFePO4 due to its higher Li+ intercalation potential of 4.1 V (vs. Li+/Li). Moreover, the high operating voltage of LiMnPO4 is compatible with present non-aqueous organic electrolytes of lithium-ion batteries. Therefore, LiMnPO4 is considered as a next generation cathode material for lithium-ion batteries. However, LiMnPO4 suffers from poor electronic conductivity and low lithium diffusivity, resulting in its low discharge capacity and poor rate capability. And these intrinsic disadvantages hinder LiMnPO4 from its practical applications in lithium-ion batteries. In this paper, recent researches in the modifications including carbon coating, ion doping, nanoization and cyrstalline morphological controlling, full cells, patent situation and commercial progress are reviewed. The prospects of its future development are also predicted. Particularly, the experimental data by Advanced Li-ion Battery Engineering Lab fully proves that LiMnPO4 has the feasibility of applying in lithium batteries of HEVs or EVs. LiMnPO4 composite such as LiMnPO4/ternary cathode materials could be most likely to be realized in the near future.

Graphical Abstract

Keywords

lithium-ion batteries, high-energy density, lithium manganese phosphate, cathode material

Publication Date

2015-06-28

Online Available Date

2015-06-28

Revised Date

2015-03-17

Received Date

2014-11-18

References

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