The possibility of manganese disorder in LiMnPO4 and its effect on the electrochemical activity

Fang, Haisheng; Pan, Zhiyun; Li, Liping; Yang, Yong; Yan, Guofeng; Li, Guangshe; Wei, Shiqiang

doi:10.1016/j.elecom.2008.05.010

Cited by 73 publications

(50 citation statements)

References 20 publications

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“…One such example is LiMnPO4 [447][448][449][450][451][452][453][454][455][456][457][458], which is isostructural to that of olivine LiFePO4, while possessing a higher operating voltage (4.1 vs. 3.5 V, respectively) [378,448], and hence energy densities which could exceed 700 Wh kg -1 . At this point, it should be suggested that LiMnPO4 represents a more realistic candidate compared to LiCoPO4 or LiNiPO4, since the working voltage of LiCoPO4 or LiNiPO4 electrodes (4.9 and 5.1 V, respectively), currently lies outside regions of stability of the commonly-employed organic (carbonate) electrolytes [378].…”

Section: Other Transition Metal Phosphates (Limpo4)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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Access to the full text of the published version may require a subscription. Rights © Tsinghua University Press and Springer-Verlag Berlin ABSTRACTThe performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li + ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li + diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions.In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures (both anode and cathode), as drivers of potential next-generation electrochemical energy storage devices.

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Section: Other Transition Metal Phosphates (Limpo4)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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“…Although there are tremendous efforts to develop a practical LiMnPO 4 cathode, only limited literature data on this cathode material for LIBs are available [17,[20][21][22][23][24][25][26]. There are several synthetic techniques applied to prepare LiMnPO 4 /C composites.…”

Section: Studies On High-performance Limnpo 4 Olivine Cathodementioning

confidence: 99%

“…They showed that the smaller particles were more preferable for the higher C-rates. Fang et al [23] prepared LiMnPO 4 by a hydrothermal method. The Mn 2+ disorder on Li + sites was depressed by increasing the synthesis temperature, and the highest discharge capacity achieved is 68 mAh g 1 at a current density of 1.5 mA g 1 .…”

Section: Studies On High-performance Limnpo 4 Olivine Cathodementioning

confidence: 99%

LiMnPO4 Olivine as a Cathode for Lithium Batteries

Bakenov¹,

Taniguchi

2011

TOMSJ

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The olivine structured mixed lithium-transition metal phosphates LiMPO 4 (M = Fe, Mn, Co) have attracted tremendous attention of many research teams worldwide as a promising cathode materials for lithium batteries. Among them, lithium manganese phosphate LiMnPO 4 is the most promising considering its high theoretical capacity and operating voltage, low cost and environmental safety. Various techniques were applied to prepare this perspective cathode for lithium batteries. The solution based synthetic routes such as spray pyrolysis, precipitation, sol-gel, hydrothermal and polyol synthesis allow preparing nanostructured powders of LiMnPO 4 with enhanced electrochemical properties, which is mostly attributed to the higher chemical homogeneity and narrow particle size distribution of the material. Up-to-date, the LiMnPO 4 /C composites prepared by the spray pyrolysis route have the best electrochemical performance among the reported in the literature.

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“…They showed that the smaller particles were more preferable for the higher C-rates. Fang et al 17 prepared LiMnPO 4 by a hydrothermal method. The Mn 2+ disorder on Li + sites was depressed by increasing the synthesis temperature, and the highest discharge capacity achieved is 68 mAh g −1 at a current density of 1.5 mA g −1 .…”

mentioning

confidence: 99%

LiMg[sub x]Mn[sub 1−x]PO[sub 4]/C Cathodes for Lithium Batteries Prepared by a Combination of Spray Pyrolysis with Wet Ballmilling

Bakenov

Taniguchi

2010

J. Electrochem. Soc.

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The LiMg x Mn 1−x PO 4 /C ͑x = 0, 0.02, 0.04, 0.12͒ composite cathode was successfully prepared by a combination of spray pyrolysis and wet ballmilling with heat-treatment. The composite cathode had narrow particle size distribution with an average particle size of 99 nm. The Mg doping on the Mn site led to the electrochemical performance enhancement of the composite cathode, which was confirmed by cyclic voltammetry, ac impedance spectroscopy, and charge-discharge tests. The Mg-doped composite cathode exhibited a high discharge capacity in lithium cell, which remarkably increased with an increase in the charge cutoff voltage under galvanostatic charge-discharge. The LiMg 0.04 Mn 0.96 PO 4 /C cathode exhibited a discharge capacity of 154 mAh g −1 ͑above 93% of the theoretical value͒ at 0.1C when charge-discharged galvanostatically to 4.9 V. Along with enhanced discharge capacity, the cell exhibited a good rate capability under the galvanostatic charge-discharge. Under the trickle mode conditions, the cell exhibited discharge capacities of 154, 136, 106, and 74 mAh g −1 at 0.05, 0.1, 1, and 5C, respectively. © 2010 The Electrochemical Society. ͓DOI: 10.1149/1.3294698͔ All rights reserved. Lithium-ion batteries ͑LIBs͒ are leading the rapidly growing market of portable power sources for various applications starting from the miniature devices, such as peacemakers and chipsets, to electricity powered automobiles and energy storage facilities. Rechargeable LIBs with liquid electrolytes were developed and introduced into the market by Sony Corporation 1 in 1991. Despite its outstanding properties compared with other types of batteries such as nickel-cadmium and metal hydride batteries, LIBs suffer from the application of high cost and toxic materials, mainly as positive electrodes. Therefore, the main demand in the field of LIBs is to develop low cost and environment-friendly materials to substitute commercial cathodes such as expensive and toxic cobalt-containing cathodes. Among other candidates to replace the high cost and toxic cobalt-based cathodes for LIBs, the olivine structured phosphates LiMPO 4 ͑M = Fe, Mn, Ni͒ are the most promising ones due to the reliable combination of theoretical capacity and cost, nontoxicity, and high electrochemical and thermal stabilities.2-5 However, high ionic and electronic resistance of these materials restricts achieving high electrochemical activity. This disadvantage has been successfully overcome for the LiFePO 4 cathodes via the synthesis of nanosized powders, the conductive layer coating of the compound particles surface and doping with cations. [3][4][5][6][7][8][9] It was shown that in the presence of carbon in the cation-doped olivine LiFePO 4 , the carbothermal reduction of iron phosphate at high temperatures leads to the formation of phosphides at the grain boundaries, and this nanonetwork could be responsible for the grain-boundary transport enhancement.9,10 The same process could be readily extendable to other olivines such as LiMnPO 4 .9 Chung et al. 11 showed tha...

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The possibility of manganese disorder in LiMnPO4 and its effect on the electrochemical activity

Cited by 73 publications

References 20 publications

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

LiMnPO4 Olivine as a Cathode for Lithium Batteries

LiMg[sub x]Mn[sub 1−x]PO[sub 4]/C Cathodes for Lithium Batteries Prepared by a Combination of Spray Pyrolysis with Wet Ballmilling

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