Hydrothermal synthesis of spindle-like Li2FeSiO4-C composite as cathode materials for lithium-ion batteries

doi:10.1016/S2095-4956(14)60147-9

能源化学(英文) ›› 2014, Vol. 23 ›› Issue (3): 274-281.DOI: 10.1016/S2095-4956(14)60147-9

Hydrothermal synthesis of spindle-like Li₂FeSiO₄-C composite as cathode materials for lithium-ion batteries

Haiyan Gao, Zhe Hu, Kai Zhang, Fangyi Cheng, Zhanliang Tao, Jun Chen

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China

收稿日期:2013-12-02 修回日期:2014-03-06 出版日期:2014-05-24 发布日期:2014-05-25
通讯作者: Jun Chen
基金资助:
This work was supported by the Programs of National 973 (2011CB935900), NSFC (21231005), MOE (B12015 and 113016A), and the Fundamental Research Funds for the Central Universities.

Hydrothermal synthesis of spindle-like Li₂FeSiO₄-C composite as cathode materials for lithium-ion batteries

Haiyan Gao, Zhe Hu, Kai Zhang, Fangyi Cheng, Zhanliang Tao, Jun Chen

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China

Received:2013-12-02 Revised:2014-03-06 Online:2014-05-24 Published:2014-05-25
Supported by:
This work was supported by the Programs of National 973 (2011CB935900), NSFC (21231005), MOE (B12015 and 113016A), and the Fundamental Research Funds for the Central Universities.

摘要/Abstract

摘要： In this paper, we report on the preparation of Li₂FeSiO₄, sintered Li₂FeSiO₄, and Li₂FeSiO₄-C composite with spindle-like morphologies and their application as cathode materials of lithium-ion batteries. Spindle-like Li₂FeSiO₄ was synthesized by a facile hydrothermal method with (NH₄)₂Fe(SO₄)₂ as the iron source. The spindle-like Li₂FeSiO₄ was sintered at 600 ℃ for 6 h in Ar atmosphere. Li₂FeSiO₄-C composite was obtained by the hydrothermal treatment of spindle-like Li₂FeSiO₄ in glucose solution at 190 ℃ for 3 h. Electrochemical measurements show that after carbon coating, the electrode performances such as discharge capacity and high-rate capability are greatly enhanced. In particular, Li₂FeSiO₄-C with carbon content of 7.21 wt% delivers the discharge capacities of 160.9 mAh·g^-1 at room temperature and 213 mAh·g^-1 at 45 ℃(0.1 C), revealing the potential application in lithium-ion batteries.

关键词: Li₂FeSiO₄-C composite, spindle like, hydrothermal synthesis, cathode material, lithium-ion battery

Abstract: In this paper, we report on the preparation of Li₂FeSiO₄, sintered Li₂FeSiO₄, and Li₂FeSiO₄-C composite with spindle-like morphologies and their application as cathode materials of lithium-ion batteries. Spindle-like Li₂FeSiO₄ was synthesized by a facile hydrothermal method with (NH₄)₂Fe(SO₄)₂ as the iron source. The spindle-like Li₂FeSiO₄ was sintered at 600 ℃ for 6 h in Ar atmosphere. Li₂FeSiO₄-C composite was obtained by the hydrothermal treatment of spindle-like Li₂FeSiO₄ in glucose solution at 190 ℃ for 3 h. Electrochemical measurements show that after carbon coating, the electrode performances such as discharge capacity and high-rate capability are greatly enhanced. In particular, Li₂FeSiO₄-C with carbon content of 7.21 wt% delivers the discharge capacities of 160.9 mAh·g^-1 at room temperature and 213 mAh·g^-1 at 45 ℃(0.1 C), revealing the potential application in lithium-ion batteries.

Key words: Li₂FeSiO₄-C composite, spindle like, hydrothermal synthesis, cathode material, lithium-ion battery

Haiyan Gao, Zhe Hu, Kai Zhang, Fangyi Cheng, Zhanliang Tao, Jun Chen. Hydrothermal synthesis of spindle-like Li₂FeSiO₄-C composite as cathode materials for lithium-ion batteries[J]. 能源化学(英文), 2014, 23(3): 274-281.

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Hydrothermal synthesis of spindle-like Li₂FeSiO₄-C composite as cathode materials for lithium-ion batteries

Hydrothermal synthesis of spindle-like Li₂FeSiO₄-C composite as cathode materials for lithium-ion batteries

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