全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电化学  2013 

多元醇法合成纳米LiCoPO4及其电化学性能

DOI: 10.13208/j.electrochem.130355, PP. 585-589

Keywords: 多元醇法,LiCoPO4,化学气相沉积,碳包覆

Full-Text   Cite this paper   Add to My Lib

Abstract:

采用多元醇法合成了高电位LiCoPO4正极材料.以甲苯为碳源,在LiCoPO4表面化学气相沉积包覆一层厚度约3nm的导电碳层.通过XRD、SEM、TEM、CV以及恒流充放电曲线等方法分析、观察和测试样品的晶体结构、微观形貌以及电化学性能.结果表明,多元醇法合成的样品为纯相LiCoPO4,碳包覆LiCoPO4/C电极0.1C倍率首次放电容量达到132mAh·g-1,50周期循环容量保持78%.循环伏安和微分容量曲线表明LiCoPO4/C电极的充放电过程Li+脱出和嵌入均为两步步骤.

References

[1]  Liu J, Conry T E, Song X, et al. Spherical nanoporous LiCoPO4/C composites as high performance cathode materials for rechargeable lithium-ion batteries[J]. Journal of Materials Chemistry, 2011, 21(27): 9984-9987.
[2]  Markevich E, Sharabi R, Gottlieb H, et al. Reasons for capacity fading of LiCoPO4 cathodes in LiPF6 containing electrolyte solutions[J]. Electrochemistry Communications, 2012, 15(1): 22-25.
[3]  Oh S M, Myung S T, Sun Y K. Olivine LiCoPO4-carbon composite showing high rechargeable capacity[J]. Journal of Materials Chemistry, 2012, 22(30):14932-14937.
[4]  Li H H, Jin J, Wei J P, et al. Fast synthesis of core-shell LiCoPO4/C nanocomposite via microwave heating and its electrochemical Li intercalation performances[J]. Electrochemistry Communications, 2009, 11(1): 95-98
[5]  Eftekhari A. Surface modification of thin-film based LiCoPO4 5 V cathode with metal oxide[J]. Journal of The Electrochemical Society, 2004, 151(9): A1456-A1460.
[6]  Ni J, Wang H, Gao L, et al. A high-performance LiCoPO4/C core/shell composite for Li-ion batteries[J]. Elecrtochimica Acta, 2012, 70: 349-354.
[7]  Wolfenstine J, Read J, Allen J L. Effect of carbon on the electronic conductivity and discharge capacity LiCoPO4[J]. Journal of Power Sources, 2007, 163(2): 1070-1073.
[8]  Doan T N L. Taniguchi I. Preparation of LiCoPO4/C nanocomposite cathode of lithium batteries with high rate performance[J]. Journal of Power Sources, 2011, 196(13): 5679-5684.
[9]  Wang S L(王绍亮), Tang Z Y(唐致远), Sha O(沙鸥), et al. Synthesis and electrochemical performance of LiCoPO4 by sol-gel method[J]. Acta Physico-Chimica Sinica (物理化学学报), 2012, 28(2): 343-348.
[10]  Xie J, Imanishi N, Zhang T, et al. Li-ion diffusion kinetics in LiCoPO4 thin films deposited on NASICON-type glass ceramic electrolytes by magnetron sputtering[J]. Journal of Power Sources, 2009, 192 (2): 689-692.
[11]  Bramnik N N, Bramnik K G, Baehtz C, et al. Study of the effect of different synthesis routes on Li extraction-insertion from LiCoPO4[J]. Journal of Power Sources, 2005, 145(1): 74-81.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133