Combustion Method to Synthesize LiFePO4 and Combustion Mechanism

doi:10.3969/j.cnki.jdxb.2015.06.013

journal6 ›› 2015, Vol. 36 ›› Issue (6): 53-58.DOI: 10.3969/j.cnki.jdxb.2015.06.013

• Biological and chemical • Previous Articles Next Articles

Combustion Method to Synthesize LiFePO₄ and Combustion Mechanism

CHEN Juan, SHI Yue, SUN Nian, CHEN Chang-Lian, WANG Shu-Lin, HUANG Zhi-Liang

(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430074,China)

Online:2015-11-25 Published:2015-12-23
About author:CHEN Juan(1992—),female,was born in Gong’an County,Hubei Province,graduate student for master degree;research area is function materials
Supported by:
National Natural Science Foundation of China (51374155);National Key Technology R&D Program (2013BAB07B01);Hubei Province Key Technology R&D Program (2014BCB034);National Natural Science Foundation of Hubei Province of China (2014CFB796)

Abstract

Abstract: Many traditional methods used to synthesize LiFePO₄ (LFP for short) have the disadvantages of long reaction time or unavoidable oxidation of Fe²⁺.In this work,the combustion method was developed to facilely synthesize LFP by using ferrous sulfate,diammonium hydrogen phosphate and lithium nitrate as main raw materials.The synthesized LFP was characterized by XRD and TG-DSC.The results showed that the combustion method could facilely synthesize purer LFP at 600 ℃ in a short period without the protection of inert gas.The studies on combustion mechanism indicated that from 120 ℃ to 290 ℃ the organic citric acid in the dry gel was combusted which could lead to a self-propagating combustion reaction and bring in carbon preventing the oxidation of Fe²⁺ simultaneously.And φ=n(CA)/n(LFP)=2 is the best amount of citric acid to synthesize LFP materials.

Key words: combustion method, synthesize, LiFePO₄, battery

CHEN Juan, SHI Yue, SUN Nian, CHEN Chang-Lian, WANG Shu-Lin, HUANG Zhi-Liang. Combustion Method to Synthesize LiFePO₄ and Combustion Mechanism[J]. journal6, 2015, 36(6): 53-58.

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Combustion Method to Synthesize LiFePO₄ and Combustion Mechanism

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