H2还原制备LiFePO4/C复合材料及反应机理
H2환원제비LiFePO4/C복합재료급반응궤리
Synthesis of LiFePO4/C composite by H2 reduction and the reaction mechanism
  • 万方数据
    电池 전지
    BATTERY BIMONTHLY
    2010年 2期 93-95 ,共3页

    童设华%习小明%湛中魁%胡常波

    동설화%습소명%담중괴%호상파

    氧化铁(Fe2O3)%磷酸铁锂(LiFePO4)%H2还原%含碳量%机理 氧化鐵(Fe2O3)%燐痠鐵鋰(LiFePO4)%H2還原%含碳量%機理
    양화철(Fe2O3)%린산철리(LiFePO4)%H2환원%함탄량%궤리
    ferric oxide(Fe2O3)%lithium iron phosphate(LiFePO4)%H2 reduction%carbon content%mechanism
    以H3PO4、Fe2O3、LiOH·H2O和葡萄糖为原料,利用H2还原制备了LiFePO4/C复合材料,并进行了XRD、SEM、碳含量和振实密度分析,以及电化学性能测试.制备的LiFePO4/C复合材料的含碳量为1.9%,振实密度为1.4 S/cm3;0.1 C、1.0 C首次放电比容量分别为148.4 mAh/g和128.4 mAh/g,1.0 C循环60次的容量保持率为98.8%.通过机理研究,发现了反应的中间产物Li3PO4、Li3Fe2(PO4)3、Fe2Fe(P2O7)2和LiFeP2O7.
    이H3PO4、Fe2O3、LiOH·H2O화포도당위원료,이용H2환원제비료LiFePO4/C복합재료,병진행료XRD、SEM、탄함량화진실밀도분석,이급전화학성능측시.제비적LiFePO4/C복합재료적함탄량위1.9%,진실밀도위1.4 S/cm3;0.1 C、1.0 C수차방전비용량분별위148.4 mAh/g화128.4 mAh/g,1.0 C순배60차적용량보지솔위98.8%.통과궤리연구,발현료반응적중간산물Li3PO4、Li3Fe2(PO4)3、Fe2Fe(P2O7)2화LiFeP2O7.
    The LiFePO4/C composite was synthesized by H2 reduction with H3PO4,Fe2O3,LiOH·H2O and glucose as raw materials,the XRD,SEM,carbon content and tap density analyses and electrochemical performance test were taken.The carbon content of prepared LiFePO4/C composite was 1.9%and the tap density was 1.4 g/cm3.Its 0.1 C,1.0 C intial specific discharge capacities were 148.4 mAh/g and 128.4 mAh/g,respectively,the capacity retention after 60 times of 1.0 C cycle was 98.8%.The intermediate products Li3PO4,Li3Fez(PO4)3,Fe2Fe(P2O7)2 and LiFeP2O7 were found by mechanism study.
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