Facile Synthesis of Hierarchical Architecture FePO₄/C Composite Microspheres

Abstract:

Carbon coated micro/nanostructure FePO₄ composite materials were synthesized by hydrothermal methode, in which citric acid was used as both complexant and carbon resource. The dependence of synthesis process and complexant on the structure and morphology of composite materials were investigated by X ray diffraction (XRD) and scanning electronmicroscopy (SEM). The results showed that the sample consisted of dispersive microspheres with a quite uniform size distribution of 10μm through hydrothermal reaction at 130°C for 24h, when solution concetration was 0.03mol/L and pH value was nearly 2. After calcinated at 550°C for 3h, the microspheres were comprised of nanosticks, and their specific surface area can reach nearly 14 m²/g. Due to their micro/nanomicrosphere structure, the composite materials will benefit to the increase of lithium diffusion rate meanwhile preserve high tap density.

• Periodical: Key Engineering Materials (Volumes 575-576)
• Pages: 209-215
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.575-576.209
• Online since: September 2013
• Authors: Sha Sha Wang, Long Fei Mu, Song Li, He Li, Zhong Sheng Wen, Shi Jun Ji, Jun Cai Sun
• Keywords: Cathode, Composite Material, FePO4, Lithium-Ion Battery, Micro/Nanostructure

References

[1] M. Ai, K. Ohdan, Mol. Catal. A, J, Chem, 159 (2000) 19.

[2] M. Ai, K. Ohdan, Appl, Catal. A 150 (1997) 13.

[3] Zhicong Shi, Yixiao Li, Weiling Ye, Y. Yang, J, Electrochem.J. Solid-State Lett. 88(2005) A396.

[4] P.P. Prosini, M. Lisi, S. Scaccia, M. Carewska, F. Cardellini, M. Pasquali, J. Electrochem. J. Soc. 149 (2002) A297.

DOI: 10.1149/1.1435359

[5] P. Tang, N.A.W. Holzwarth, Phys. Rev. B (2003) 68.

[6] John B Goodenough, Youngsik Kim, J. Chem. Mater. 22(2010), 587.

[7] A. K. Padhi, K.S. Nanjundaswamy, J.B. Goodenough, J. Electrochem. Soc. 144 (1997) 1188.

[8] M.S. Whittingham, Chem, Rev. 104 (2004) 4271-4301.

[9] C.A.J. Fisher, V.M.H. Prieto, M.S. Islam, J. Chem, Mater. 20 (2008) 5907.

[10] H. Huang, S.C. Yin, L.F. Nazar, Electrochem. Solid-State Lett. 4 (2001) A170.

[11] Z.H. Chen, J.R. Dahn, J. Electrochem. Soc. 149 (2002) A1184.

[12] Hongmei Du, Yuchang Si, Yijing Wang, Huatang Yuan, J. Power Sources 196 (2011) 2841.

[13] Jiangfeng Qian, Min Zhou, Yuliang Cao, et al., J phys. Chem. C (2010), 114, 3477.

[14] Chunwen Sun, Shreyas Rajasekhara, John B Goodenough, et al, J. Am. Chem. Soc. 133 (2011) 2132.

[15] G. -n. Hao, H. Zhang, X. -H. Chen, et al, Materials Research Bulletin (2010), doi: 10. 1016 j. materresbull. 2012. 08. 062.

[16] Meng Wang, Yinghui Xue, Keli Zhang, et al, Electrochimica Acta . 56 (2011) 4294.

[17] Zhao-Jin Wu, Yuan Zhou, Shi-Huai Su, Zhi-Fang Gao, et al, Scripta Materialia. 67 (2012) 221.