燃烧法制备LiFePO_4及其燃烧机制（英文）  

Combustion Method to Synthesize LiFePO_4 and Combustion Mechanism

作　　者：陈娟[1] 石月[1] 孙念[1] 陈常连[1] 王树林[1] 黄志良[1] 

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430074

出　　处：《吉首大学学报（自然科学版）》2015年第6期53-58,共6页Journal of Jishou University(Natural Sciences Edition)

基　　金：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)

摘　　要：许多合成磷酸铁锂（LFP）的传统方法具有反应时间长或者Fe^2＋易氧化的缺点.使用硫酸亚铁、磷酸氢二铵和硝酸锂为主要原料,通过燃烧法制备LFP,由XRD和TG-DSC表征所得样品.结果表明,该燃烧法可以在600℃短时间内合成较纯的LFP,并且不需要通入保护气体.对燃烧机制的研究表明,从120~290℃,干凝胶的燃烧导致有机柠檬酸的自蔓延燃烧反应,同时引入的碳防止Fe^2＋的氧化,并且当φ=n（CA）/n（LFP）=2时,是合成LFP材料柠檬酸的最佳用量.Many traditional methods used to synthesize LiFePO_4（LFP for short）have the disadvantages of long reaction time or unavoidable oxidation of Fe^2＋.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 Fe^2＋simultaneously.Andφ=n（CA）/n（LFP）=2is the best amount of citric acid to synthesize LFP materials.

关 键 词：燃烧法 制备 LIFEPO4 电池 

分 类 号：O614.111[理学—无机化学]