The influence of iron substitution on the electrochemical properties of Li1+xTi2−xFex(PO4)3/C composites as electrodes for lithium batteries

作者: C Vidal-Abarca , P Lavela , MJ Aragon , N Plylahan , JL Tirado

DOI: 10.1039/C2JM34227H

关键词: Mössbauer spectroscopyAnalytical chemistryPhosphateElectrochemistryInterphaseMaterials sciencePhase (matter)CrystallographyElectrodeOrthorhombic crystal systemLithium

摘要: The Li1+xTi2−xFex(PO4)3/C series with 0 ≤ x 0.4 was prepared by a sol–gel method. XRD patterns showed rhombohedral phase and minor contribution of an orthorhombic phase. local environment the phosphate structure analyzed 31P MAS NMR spectroscopy. electrochemical lithium insertion revealed two reversible regions for Fe3+/Fe2+ Ti4+/Ti3+ reactions as confirmed 57Fe Mossbauer Capacity values large 130 mA h g−1 were recorded Li1.2Ti1.8Fe0.2(PO4)3/C after 40 cycles. drastic decrease in capacity observed LiTi2(PO4)3/C cycled at C/2 explained terms lower kinetic response electrode–electrolyte interphase.

参考文章(35)
S. Senbhagaraman, A.M. Umarji, Effect of cation valence on thermal expansion ofMTi2P3O12 (M =Na, Ca0.5, and La0.33)compounds Journal of Solid State Chemistry. ,vol. 85, pp. 169- 172 ,(1990) , 10.1016/S0022-4596(05)80073-8
Genki Kobayashi, Atsuo Yamada, Shin-ichi Nishimura, Ryoji Kanno, Yo Kobayashi, Shiro Seki, Yasutaka Ohno, Hajime Miyashiro, Shift of redox potential and kinetics in Lix(MnyFe1−y)PO4 Journal of Power Sources. ,vol. 189, pp. 397- 401 ,(2009) , 10.1016/J.JPOWSOUR.2008.07.085
Koji Makino, Yasushi Katayama, Takashi Miura, Tomiya Kishi, Electrochemical insertion of magnesium to Mg0.5Ti2(PO4)3 Journal of Power Sources. ,vol. 99, pp. 66- 69 ,(2001) , 10.1016/S0378-7753(01)00480-3
J. Moskon, R. Dominko, M. Gaberscek, R. Cerc-Korosec, J. Jamnik, Citrate-Derived Carbon Nanocoatings for Poorly Conducting Cathode A Detailed Study Using TiO 2 Substrate Materials Journal of The Electrochemical Society. ,vol. 153, ,(2006) , 10.1149/1.2221864
K. Arbi, A. Kuhn, J. Sanz, F. García-Alvarado, Characterization of Lithium Insertion into NASICON-Type Li1 + x Ti2 − x Al x ( PO4 ) 3 and Its Electrochemical Behavior Journal of The Electrochemical Society. ,vol. 157, ,(2010) , 10.1149/1.3368764
Miran Gaberscek, Robert Dominko, Janez Jamnik, The meaning of impedance measurements of LiFePO4 cathodes: A linearity study Journal of Power Sources. ,vol. 174, pp. 944- 948 ,(2007) , 10.1016/J.JPOWSOUR.2007.06.205
Jia-Yan Luo, Li-Juan Chen, Yu-Jun Zhao, Ping He, Yong-Yao Xia, The effect of oxygen vacancies on the structure and electrochemistry of LiTi2(PO4)3 for lithium-ion batteries: A combined experimental and theoretical study Journal of Power Sources. ,vol. 194, pp. 1075- 1080 ,(2009) , 10.1016/J.JPOWSOUR.2009.06.050
Li Liu, Meng Zhou, Guo Wang, Haipeng Guo, Fanghua Tian, Xianyou Wang, Synthesis and characterization of LiTi2(PO4)3/C nanocomposite as lithium intercalation electrode materials Electrochimica Acta. ,vol. 70, pp. 136- 141 ,(2012) , 10.1016/J.ELECTACTA.2012.03.046
Jiangfeng Ni, Haibo Wang, Lijun Gao, Li Lu, A high-performance LiCoPO4/C core/shell composite for Li-ion batteries Electrochimica Acta. ,vol. 70, pp. 349- 354 ,(2012) , 10.1016/J.ELECTACTA.2012.03.080
R. Dominko, M. Gaberscek, M. Bele, D. Mihailovic, J. Jamnik, Carbon nanocoatings on active materials for Li-ion batteries Journal of The European Ceramic Society. ,vol. 27, pp. 909- 913 ,(2007) , 10.1016/J.JEURCERAMSOC.2006.04.133