固相法合成磷酸铁锂
摘要
橄榄石型的磷酸铁锂（LiFePO4）作为新型锂离子电池正极材料，它具有价格低廉，热稳定性好，对环境无毒，可逆性好，并且其中大阴离子可稳定其结构，防止铁离子溶解，使其成为最具潜力的正极材料之一。但是LiFePO4极低的本征电子电导率和锂离子扩散系数严重影响其电化学性能，并阻碍它的应用。因此需从提高LiFePO4材料的电子传导性和锂离子传导性着手来对其进行改性研究。
本实验以Li2CO3为锂源，FeC2支付扣款顺序怎么设置O2宠物出国·2H2O为铁源，以NH4H2PO4为磷源，以淀粉为碳源按不同比例混合，采用球磨法处理原材料，经喷雾干燥制得前驱体。采用不同的烧成温度并应用充放电测试等方法，系统的研究温度对11月再见12月你好图片LiFePO4性能的影响。
结果表明在0.1C倍率充放电时600℃下合成的材料具有较好的放电容量为151.6mAh/g。
关键词：锂离子电池；正极材料；磷酸铁锂；固相法；温度影响

Abstract
Olivine-type LiFePO4 as a new lithium ion battery cathode material, it has low price, good thermal stability, environmental non-toxic, good reversibility, and anion of which can stabilize the structure to prevent the dissolution of iron ions , making it one of the most promising cathode material.But LiFePO4 low intrinsic electronic conductivity and lithium ion diffusion coefficient seriously affect its electrochemical performance, and hinder its application.Therefore required to improve the LiFePO4 material from the electronic conductivity and lithium ion conductivity to proceed to its modification.
In this experiment, Li2CO3 as lithium, FeC2O2.2H2O,Fe2华南师大增城学院O3 as iron source, NH双筒天文望远镜4H2PO服饰彩搭配4 as the phosphorus source, using starch as carbon source mixed in different proportions, handling of raw materials by ball milling, spray-dried precursor obtained. Sintering temperature and different charge-discharge testing methods applied to study the impact of temperature on the performance of LiFePO4.
Results show thatLiFePO4 cells showed an enhanced cycling performance and a high discharge capacity of 151.6mAh g-1at 0.1 C
Keywords：Lithium ion battery; Cathode material; Lithium iron phosphate,
Solid State Method ;temperature effect

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