材料研究学报  2011, Vol. 25 Issue (2): 205-208

研究论文 本期目录 | 过刊浏览 |

Mn4+--掺杂锂钒氧化物的合成及其电化学性能

陈一维1, 张颖1, 汪大云2, 韩恩山1

1.河北工业大学化工学院 天津 300130 2.河北工业大学理学院 天津 300130

Synthesis and Electrochemical Performance of Mn4+ Doped Lithium Vanadium Oxide

CHEN Yiwei1, ZHANG Ying1,  WANG Dayun2,  HAN Enshan1

1.School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130 2.School of Sciences, Hebei University of Technology, Tianjin 300130

陈一维 张颖 汪大云 韩恩山 . Mn4+--掺杂锂钒氧化物的合成及其电化学性能[J]. 材料研究学报, 2011, 25(2): 205-208.
, , , . Synthesis and Electrochemical Performance of Mn4+ Doped Lithium Vanadium Oxide[J]. Chin J Mater Res, 2011, 25(2): 205-208.

摘要 参考文献 相关文章 Metrics 全文: PDF(836 KB)   摘要: 以LiOH ? H2O、NH4VO3和Mn(CH3COO)2 4H2O为原料, 以柠檬酸(C6H8O7 ? H2O)为络合剂, 用凝胶溶胶法按xLiV3O8 yLiMn2O4(x:y=1:0, 4:1, 8:1, 12:1, 16:1)合成出锂离子电池正极材料Mn4+--LiV3O8, 并对其结构和电化学性能进行了研究。结果表明, 用该法制备的样品具有良好的层状晶体结构和良好的充放电性能。 当x : y = 12 : 1时, 在1.8--3.8 V范围内以0.1 C 倍率循环时, 首次放电比容量高达387.9 mAh/g, 比未掺杂Mn4+时(299.9 mAh/g)提高了29.3%。经过30次循环后, 放电比容量仍保持为376.4 mAh/g, 充放电效率维持在97%以上。 关键词 ： 无机非金属材料,  锂离子电池正极材料,  掺杂,  循环伏安,  溶胶凝胶法     Abstract：According to the stoichiometric ratio of xLiV3O8·yLiMn2O4 (x:y=1:0, 4:1, 8:1, 12:1, 16:1), lithium vanadium oxide Mn4+–LiV3O8 was synthesized by a sol–gel method with LiOH·H2O, NH4VO3, Mn(CH3 COO)2·4H2O and C6 H8O7·H2O as starting materials, and its electrochemical characterization and structure has been investigated. The results show that the Mn4+–LiV3O8 made by sol–gel method has well–developed crystal structure of layered LiV3O8 and a good charge–discharge characterization. The initial discharge specific capacity with Mn4+ doping at x:y=12:1 reaches 387.9 mAh/g, which is 29.3% larger than that of pure material (299.9 mAh/g), and keeps 376.4 mAh/g after 30 cycles when cycles at 0.1C rate over the voltage range of 1.8–3.8 V. Further-more, the material preserves a high charge-discharge efficiency above 97%. Key words： inorganic non-metallic    lithium-ion battery cathode material    doping    cyclic voltammogram    sol-gel method 收稿日期: 2010-08-16      ZTFLH:  TM912   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈一维 张颖 韩恩山 汪大云 44.8K 链接本文: https://www.cjmr.org/CN/      或      https://www.cjmr.org/CN/Y2011/V25/I2/205 1 Wadsley, Crystal chemistry of non-stoichiometric pentavalent vandadium oxides: crystal structure of Li1+xV3O8, Acta Cryst., 10, 261(1957) 2 Jouanneau S, Verbaere A, Guyomard D, A combined Xray and neutron Rietveld study of the chemically lithiated electrode materials Li2.7V3O8 and Li4.8V3O8, Journal of Solid State Chemistry, 178(1),22(2005) 3 LIU Liying, TIAN Yanwen, ZHAI Yuchun, XU Chaqing, Influence of Cr3+ doping on structure and electrochemical properties of Li1.05V3O8, Chinese Journal of Materials Research, 20(4),412(2006) 4 Jin Kawakita, HiroakiMori, Takashi Miura, Tomiya Kishi, Formation process and structural characteristics of layered hydrogen vanadium, Solid State Ionics, 131(3), 229(2000) 5 M.Dubarry, J.Gaubicher, D.Guyomard, N.Dupr´e, C.Grey, Ultrafast synthesis of Li1+αV3O8 gel precursors for lithium battery applications, Solid State Ionics, 180(32), 1511(2009) 6 S.H.Ju, Y.C.Kang, Morphological and electrochemical properties of LiV3O8 cathode powders prepared by spray pyrolysis, Electrochim.Acta, 55(2), 6088(2010) 7 A.Sakunthala, M.V.Reddy, S.Selvasekarapandian, B.V.R.Chowdari, P.C.Selvin, Preparation, Characterization, and Electrochemical Performance of Lithium Trivanadate Rods by a Surfactant-Assisted Polymer Precursor Method for Lithium Batteries, J.Phys.Chem.C, 114(17), 8099(2010) 8 Manev V, Momchilov A, Nassalevska A, Pistoia G, Pasquali M, A new approach to the improvement of Li1+xV3O8 performance in rechargeable lithium batteries, J Power Sources, 54(2), 501(1995) 9 F.Wu, L.Wang, C.Wu, Y.Bai, F wang, Study on Li1+xV3O8 synthesized by microwave sol-gel route, Materials Chemistry and Physics, 115(2), 707(2009) 10 SUN Junli, PENG Wenxiu, SONG Dawei, WANG Qinghong, DU Hongmei, JIAO Lifang, SI Yuchang, YUAN Huatang, Electrochemical properties of facile emulsified LiV3O8 materials, Materials Chemistry and Physics, 124, 248(2010) 11 Pistoia G, Pasquali M,Wang G, Li/Li1+xV3O8 Secondary Batteries, J. 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