中热固相法Li1+x V3 O8-y Fy 正极材料的制备及性能

doi:10.7523/j.issn.2095-6134.2011.4.005

中国科学院大学学报 ›› 2011, Vol. 28 ›› Issue (4): 457-461.DOI: 10.7523/j.issn.2095-6134.2011.4.005

中热固相法Li_1+x V₃ O_8-y F_y 正极材料的制备及性能

秦红莲¹, 唐致远¹, 马莉²

1. 天津大学化工学院应用化学系, 天津 300072;
2. 东莞市迈科科技有限公司, 东莞 523800

收稿日期:2010-04-02 修回日期:2010-10-25 发布日期:2011-07-15
基金资助:
国家自然科学基金(20973124)和教育部博士点基金(20070056138)资助 

Preparation and electrochemical properties of Li_1+xV₃O_8-yF_y synthesized by solid state reaction method at moderate-heating temperature

QIN Hong-Lian¹, TANG Zhi-Yuan¹, MA Li²

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Dongguan Mcnair Technology Co. Ltd, Dongguan 523800, China

Received:2010-04-02 Revised:2010-10-25 Published:2011-07-15

摘要/Abstract

摘要：

以Li₂CO₃和V₂O₅为原料,用中热固相法制备了掺杂不同氟离子含量的锂离子电池正极材料Li_1+xV₃O_8-yF_y,采用XRD衍射对其结构进行表征,并通过充放电测试、循环伏安及电导率测试对其性能进行了研究.测试结果表明,中热固相法制得的Li_1+xV₃O_8-yF_y产品较纯,没有杂质相存在;当y = 0.1时产品的电化学循环性能最好,首次放电比容量达252.08 mAh/g,以0.2c倍率循环25次之后比容量仍保持在210.93 mAh/g,容量保持率达92.72%.

关键词: Li_1+xV₃O_8-yF_y, F^-掺杂, 锂离子电池, 正极材料, 中热固相法

Abstract:

F^--doped lithium vanadium oxides Li_1+xV₃O_8-yF_y was synthesized by a solid state reaction at moderate-heating temperature with Li₂CO₃and V₂O₅ as raw materials. Crystal structures were characterized by XRD and electrochemical properties were studied by charge-discharge performance test, cyclic voltammetry test, and conductance test. The XRD results indicate that the products are pure without any impurities. Li_1+xV₃O_8-yF_y (y=0.1) shows the best electrochemical cyclability. The first discharge specific capacity is 252.08mAh/g, and the attractive specific capacity of 210.93 mAh/g is obtained after 25 cycles at 0.2c.

Key words: Li_1+xV₃O_8-yF_y, Fluorine doping, Lithium ion batteries, cathode material, solid state reaction at moderate-heating temperature

中图分类号:

TQ15

秦红莲, 唐致远, 马莉. 中热固相法Li_1+x V₃ O_8-y F_y 正极材料的制备及性能[J]. 中国科学院大学学报, 2011, 28(4): 457-461.

QIN Hong-Lian, TANG Zhi-Yuan, MA Li. Preparation and electrochemical properties of Li_1+xV₃O_8-yF_y synthesized by solid state reaction method at moderate-heating temperature[J]. , 2011, 28(4): 457-461.

参考文献

[1] Wadsley A D. Crystal chemistry of non-stoichiometric pentavalent vanadium oxides: crystal structure of Li_1+xV₃O₈
[J]. Acta Crysta, 1957, 10: 261-267.

[2] 史鹏飞.化学电源工艺学
[M].哈尔滨:哈尔滨工业大学出版社,2006:200-201.

[3] Pistoia G, Pasquali M, Tocci M, et al. Lithium/lithium vanadium oxide secondary batteries: IV Evaluation of factors affecting the performance of test cells
[J].J Power Sources, 1985, 15(1):13-25

[4] Liu J R, Wang M, Yin D C, et al. Low-temperature synthesis of LiV₃O₈ as cathode material for rechargeable Lithium-ion batteries
[J]. Journal of Inorganic Materials, 2002, 17(3): 617-620(in Chinese). 刘建睿,王猛,尹大川,等. 锂离子电池正极材料LiV₃O₈的低温合成研究
[J].无机材料学报,2002,17(3):617-620.

[5] Pistoia G,Pasquali M,Wang G,et a1.Li/Li_1+xV₃O₈ secondary batteries
[J].J Electrochem Soc,1990,137(8):2365-2370.

[6] Zhang H X, Tong Q S, Lin S Y, et al. The electrochemical characteristics of Li_1+xV₃O₈ synthesized by a microwave sintering method
[J]. Chinese Journal of Power Sources, 2005, 29(2): 71-74 (in Chinese). 张华香,童庆松,林素英,等. 微波烧结法制备Li_1+xV₃O₈的电化学性能
[J] . 电源技术, 2005,29(2):71-74.

[7] Kumagai N, Yu A. Ultrasonically treated LiV₃O₈ as a cathode material for secondary lithium batteries
[J]. J Electrochem Soc, 1997, 144(3):830- 835.

[8] Tran N, Bramnik K G, Hibst H, et al. Spray-drying synthesis and electrochemical performance of lithium vanadates as positive electrode materials for lithium batteries
[J]. J Electrochem Soc,2008, 155(5):A384-A389.

[9] Dai J X, Sam F Y Li, Gao Z Q, et al. Low-temperature synthesized LiV₃O₈ as a cathode material for rechargeable lithium batteries
[J]. J Electrochem Soc,1998, 145:3057-3062.

[10] Manev V, Momchilov A, Nassalevska A, et al. A new approach to the improvement of Li_1+xV₃O₈ performance in rechargeable lithium batteries
[J]. J Power Sources, 1995, 54: 501-507.

[11] Kawakita J, Makino K, Katyama Y, et al. Preparation and lithium insertion behavior of Li_yNa_{1. 2 - y}V₃O₈
[J]. J Solid State Ionics, 1997, 99(3-4):165-171.

[12] Kumagai N, Yu A, West K. Li_{1 -x}Na_xV₃O₈ as positive materials for secondary lithium batteries
[J]. J Applied Electrochemistry, 1997, 27 (8):953-958.

[13] Kawakita J, Katagiri H, Miura T, et al. Lithium insertion behavior of manganese or molybdenum substituted Li_{1+ x}V₃O₈
[J]. J Power Sources, 1997, 68: 680-685.

[14] Serge V Pouchko, Alexey K Ivanov-Schitz, Frans G B Ooms, et al. Lithium insertion into γ-type vanadium oxide bronzes doped with molybdenum VI and tungsten VI ions
[J]. Solid State Ionics, 2001, 144: 151-161.

[15] Jiao L F, Liu L, Sun J L, et al. Effect of AlPO₄ nanowire coating on the electrochemical properties of LiV₃O₈ cathode material
[J]. J Phys Chem C, 2008, 112:18249-18254.

[16] West K, Zachau-Christiansen B, Skaarup S, et al. Comparison of LiV₃O₈ cathode materials prepared by different methods
[J]. J Electrochem Soc,1996, 143(3):820-825.

[17] Dean J A, Lange N A. Langes handbook of chemistry
[M]. 15th ed. New York: Mc Graw-Hill, c1999.

中热固相法Li_1+x V₃ O_8-y F_y 正极材料的制备及性能

Preparation and electrochemical properties of Li_1+xV₃O_8-yF_y synthesized by solid state reaction method at moderate-heating temperature

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