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Synthesis and Electrochemical Performance of LiMnPO4 by Hydrothermal Method

DOI: 10.1155/2014/768912

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Abstract:

LiMnPO4 with olivinestructure which is the promising candidate for high voltage cathode material was synthesized by hydrothermal method. In order to synthesize high purity and well-defined LiMnPO4, several precursors for Li, Mn, and P sources and hydrothermal reaction parameters including temperature and [H2O]/[Mn] value are optimized. By analyzing the structure, Mn valence, morphology, and chemical ratio via XRD, XPS, Raman, SEM, and ICP LiMnPO4 synthesized from manganese acetate tetrahydrate have single phase of LiMnPO4 without impurity and showed charge and discharge reaction caused by Mn2+/Mn3+ redox. Specific capacity of synthesized LiMnPO4 grew up during cycling. Moreover, when hydrothermal temperature was set at 150°C and [H2O]/[Mn] value was set at 15, discharge capacity as high as 70?mAh/g was obtained at rate. 1. Introduction Lithium-ion batteries are used widely as mobile devices like cellphone and notebook. Recently, researchers are actively devoted into the lithium-ion battery research for high energy conversion system, such as electric vehicle. Most of present lithium-ion batteries have used LiCoO2 as cathode which was discovered in 1980 [1]. However, LiCoO2 which includes rare-metal Co has irreversible structure shift at discharging over 0.6 Li from LiCoO2 that cause discharge capacity limited to 120~130?mAh/g instead of theoretical capacity of 270?mAh/g [2]. Several alternative materials are proposed as cathode materials. In 1997, Padhi et al. reported that phospho-olivine can work as promising cathode materials for lithium-ion battery [3, 4]. Among phospho-olivine LiFePO4, LiMnPO4, LiCoPO4, and LiNiPO4 are considered to be possible candidates for lithium-ion battery. Compared to LiFePO4 and LiCoPO4, LiMnPO4 is a cathode material with high redox potential which can be used with presently available liquid electrolyte so that LiMnPO4 exceeds the energy density of LiFePO4 which is the most investigated electrode among LiMPO4 family [5]. The characteristic of this olivine structure is an inductive effect which appears due to a strong covalent bond of to rise up redox potential [3]. However, the strong covalent bond causes poor conductivity, decelerating the charge and discharge processes. So far, several approaches have been used to solve this problem, such as controlling the particle size, morphology, and carbon coating [6]. Solid state reaction is generally used to prepare LiMnPO4 [7, 8]. Besides this, other approaches such as sol-gel method [9, 10], precipitation [11–13], hydrothermal [10, 14–19], solvothermal method [14, 20–22], spray

References

[1]  K. Mizushima, P. C. Jones, P. J. Wiseman, and J. B. Goodenough, “LixCoO2 : a new cathode material for batteries of high energy density,” Materials Research Bulletin, vol. 15, no. 6, pp. 783–789, 1980.
[2]  G. G. Amatucci, J. M. Tarascon, and L. C. Klein, “Cobalt dissolution in LiCoO2-based non-aqueous rechargeable batteries,” Solid State Ionics, vol. 83, no. 1-2, pp. 167–173, 1996.
[3]  A. K. Padhi, K. S. Nanjundaswamy, and J. B. Goodenough, “Phospho-olivines as positive-electrode materials for rechargeable lithium batteries,” Journal of the Electrochemical Society, vol. 144, no. 4, pp. 1188–1194, 1997.
[4]  A. K. Padhi, K. S. Nanjunclaswamy, C. Masquelier, S. Okada, J. B. Gooclenough, and J. Electrochem, “Effect of structure on the Fe3+/Fe2+ redox couple in iron phosphates,” Journal of The Electrochemical Society, vol. 144, no. 5, pp. 1609–1613, 1997.
[5]  W. F. Howard and R. M. Spotnitz, “Theoretical evaluation of high-energy lithium metal phosphate cathode materials in Li-ion batteries,” Journal of Power Sources, vol. 165, no. 2, pp. 887–891, 2007.
[6]  C. Delacourt, L. Laffont, R. Bouchet et al., “Toward understanding of electrical limitations (electronic, ionic) in LiMPO4 (M?=?Fe, Mn) electrode materials,” Journal of the Electrochemical Society, vol. 152, no. 5, pp. A913–A921, 2005.
[7]  J. Kim, K.-Y. Park, I. Park et al., “The effect of particle size on phase stability of the delithiated LixMnPO4,” Journal of the Electrochemical Society, vol. 159, no. 1, pp. A55–A59, 2012.
[8]  D. Choi, D. Wang, I. Bae et al., “LiMnPO4 nanoplate grown via solid-state reaction in molten hydrocarbon for Li-ion battery cathode,” Nano Letters, vol. 10, no. 8, pp. 2799–2805, 2010.
[9]  T. Drezen, N.-H. Kwon, P. Bowen, I. Teerlinck, M. Isono, and I. Exnar, “Effect of particle size on LiMnPO4 cathodes,” Journal of Power Sources, vol. 174, no. 2, pp. 949–953, 2007.
[10]  J. Yoshida, M. Stark, J. Holzbock et al., “Analysis of the size effect of LiMnPO4 particles on the battery properties by using STEM-EELS,” Journal of Power Sources, vol. 226, pp. 122–126, 2013.
[11]  T. Kim, H. Park, M. Lee, S. Lee, and H. Song, “Restricted growth of LiMnPO4 nanoparticles evolved from a precursor seed,” Journal of Power Sources, vol. 210, pp. 1–6, 2012.
[12]  J. Xiao, W. Xu, D. Choi, and J. Zhang, “Synthesis and characterization of lithium manganese phosphate by a precipitation method,” Journal of the Electrochemical Society, vol. 157, no. 2, pp. A142–A147, 2010.
[13]  C. Delacourt, P. Poizot, M. Morcrette, J.-M. Tarascon, and C. Masquelier, “One-step low-temperature route for the preparation of electrochemically active LiMnPO4 powders,” Chemistry of Materials, vol. 16, no. 1, pp. 93–99, 2004.
[14]  M. K. Devaraju and I. Honma, “Hydrothermal and solvothermal process towards development of LiMPO4 (M = Fe, Mn) nanomaterials for lithium-ion batteries,” Advanced Energy Materials, vol. 2, no. 3, pp. 284–297, 2012.
[15]  C. Neef, C. J?hne, H.-P. Meyer, and R. Klingeler, “Morphology and agglomeration control of LiMnPO4 micro- and nanocrystals,” Langmuir, vol. 29, no. 25, pp. 8054–8060, 2013.
[16]  H. Ji, G. Yang, H. Ni, S. Roy, J. Pinto, and X. Jiang, “General synthesis and morphology control of LiMnPO4 nanocrystals via microwave-hydrothermal route,” Electrochimica Acta, vol. 56, no. 9, pp. 3093–3100, 2011.
[17]  K. Dokko, T. Hachida, and M. Watanabe, “LiMnPO4 nanoparticles prepared through the reaction between Li3PO4 and molten aqua-complex of MnSO4,” Journal of the Electrochemical Society, vol. 158, no. 12, pp. A1275–A1281, 2011.
[18]  X.-L. Pan, C.-Y. Xu, and L. Zhen, “Synthesis of LiMnPO4 microspheres assembled by plates, wedges and prisms with different crystallographic orientations and their electrochemical performance,” CrystEngComm, vol. 14, no. 20, pp. 6412–6418, 2012.
[19]  Z. Gao, X. Pan, H. Li, S. Xie, R. Yi, and W. Jin, “Hydrothermal synthesis and electrochemical properties of dispersed LiMnPO4 wedges,” CrystEngComm, vol. 15, no. 38, pp. 7808–7814, 2013.
[20]  F. Zhou, P. Zhu, X. Fu, R. Chen, R. Sun, and C. Wong, “Comparative study of LiMnPO4 cathode materials synthesized by solvothermal methods using different manganese salts,” CrystEngComm, vol. 16, no. 5, pp. 766–774, 2014.
[21]  Z. Qin, X. Zhou, Y. Xia, C. Tang, and Z. Liu, “Morphology controlled synthesis and modification of high-performance LiMnPO4 cathode materials for Li-ion batteries,” Journal of Materials Chemistry, vol. 22, no. 39, pp. 21144–21153, 2012.
[22]  J. Su, B. Wei, J. Rong et al., “A general solution-chemistry route to the synthesis LiMPO4 (M?=?Mn, Fe, and Co) nanocrystals with [010] orientation for lithium ion batteries,” Journal of Solid State Chemistry, vol. 184, no. 11, pp. 2909–2919, 2011.
[23]  T. N. L. Doan and I. Taniguchi, “Cathode performance of LiMnPO4/C nanocomposites prepared by a combination of spray pyrolysis and wet ball-milling followed by heat treatment,” Journal of Power Sources, vol. 196, no. 3, pp. 1399–1408, 2011.
[24]  S. K. Martha, B. Markovsky, J. Grinblat et al., “LiMnPO4 as an advanced cathode material for rechargeable lithium batteries,” Journal of the Electrochemical Society, vol. 156, no. 7, pp. A541–A552, 2009.
[25]  S. Moon, P. Muralidharan, and D. K. Kim, “Carbon coating by high-energy milling and electrochemical properties of LiMnPO4 obtained in polyol process,” Ceramics International, vol. 38, no. 1, pp. S471–S475, 2012.
[26]  J. Lee, M. Park, B. Anass, J. Park, M. Paik, and S. Doo, “Electrochemical lithiation and delithiation of LiMnPO4: effect of cation substitution,” Electrochimica Acta, vol. 55, no. 13, pp. 4162–4169, 2010.
[27]  P. R. Kumar, M. Venkateswarlu, M. Misra, A. K. Mohanty, and N. Satyanarayana, “Carbon coated LiMnPO4 nanorods for lithium batteries,” Journal of the Electrochemical Society, vol. 158, no. 3, pp. A227–A230, 2011.
[28]  K. P. Korona, J. Papierska, M. Kamińska, A. Witowski, M. Michalska, and L. Lipińska, “Raman measurements of temperature dependencies of phonons in LiMnPO4,” Materials Chemistry and Physics, vol. 127, no. 1-2, pp. 391–396, 2011.

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