李杨,李进,席文,张佃平.磷酸铁锂正极墨水配制及其电化学性能研究[J].稀有金属材料与工程,2022,51(8):3070~3076.[liyang,lijin,xiwen,zhangdianping.Study on Preparation and Electrochemical Performance of Lithium Iron Phosphate Cathode Ink[J].Rare Metal Materials and Engineering,2022,51(8):3070~3076.]
磷酸铁锂正极墨水配制及其电化学性能研究
投稿时间:2021-07-25  修订日期:2021-12-20
中文关键词:  磷酸铁锂、氧化石墨烯、墨水配置、电化学性能
基金项目:国家自然科学基金资助(项目号51962030)
中文摘要:
      众所周知,磷酸铁锂(LiFePO4)作为锂离子电池正极材料因其放电容量大、价格低廉和对环境无污染受到广泛关注。本文旨在制备出适用于微电子打印机的性能优良的磷酸铁锂及相应复合材料正极墨水。通过配置不同浓度的磷酸铁锂墨水并制备成电极,研究最优浓度墨水制备成电极的电化学性能。研究表明,电流密度为0.1 C时,打印浓度为10%的磷酸铁锂电极放电比容量高达142 mAhg-1,库伦循环效率达92%;基于磷酸铁锂具有较差的导电性,选择加入少量还原氧化石墨烯提高其导电性。研究结果表明,还原氧化石墨烯质量分数为0.6%时,磷酸铁锂和还原氧化石墨烯复合材料放电比容量达152.1 mAhg-1,库伦循环效率为99.2%,说明引入还原氧化石墨烯有利于提高材料整体性能。
Study on Preparation and Electrochemical Performance of Lithium Iron Phosphate Cathode Ink
英文关键词:Lithium iron phosphate  Graphene oxide  Ink configuration  Electrochemical performance
英文摘要:
      As we all know, lithium iron phosphate (LiFePO4) is a cathode material for lithium-ion batteries. It has received widespread attention due to its large discharge capacity, low price and no pollution to the environment. This article aims to prepare lithium iron phosphate and corresponding composite cathode inks with excellent performance suitable for microelectronic printers. Configured different concentrations of lithium iron phosphate inks and prepare electrodes, and used it to study the electrochemical performance of the electrodes prepared from the optimal concentration inks. Studies have shown that when the current density is 0.1 C, the specific discharge capacity of the lithium iron phosphate electrode with a printing concentration of 10% is as high as 142 mAhg-1, and the coulombic cycle efficiency reaches 92%; based on the poor conductivity of lithium iron phosphate, a small amount is selected to be added Reduce graphene oxide to improve its conductivity. The research results show that when the mass fraction of reduced graphene oxide is 0.6%, the discharge specific capacity of the composite material of lithium iron phosphate and reduced graphene oxide reaches 152.1 mAhg-1, and the Coulomb cycle efficiency is 99.2%. It shows that the introduction of reduced graphene oxide is beneficial to improve the overall performance of the material.
作者单位E-mail
李杨 宁夏大学 15809420996@163.com 
李进 宁夏大学 li-jin@163.com 
席文 宁夏大学  
张佃平 宁夏大学  
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