铁矿一步水热法制备磷酸铁前驱体的工艺探究
Exploration of the Process for Preparing Iron Phosphate Precursor by One Step Hydrothermal Method from Iron Ore
谭仕荣 1訚硕 1董阳阳1
作者信息
- 1. 湖南中伟新能源科技有限公司,湖南 宁乡 410625
- 折叠
摘要
磷酸铁锂具有价格低廉、环境友好、热稳定性高等优点,是目前极具潜力的正极材料.作为磷酸铁锂合成的关键影响因素,磷酸铁前驱体的制备工艺往往使用已提纯的铁盐,以避免铁矿中杂质的影响.为了优化磷酸铁前驱体的制备工艺,降低成本,试验使用铁矿一步水热法制备磷酸铁前驱体,并分析不同制备工艺对铁与磷转化率、磷酸铁前驱体结构和磷酸铁锂电池电化学性能的影响.在较高的硝酸浓度和水热温度下,高铁、磷转化率的前驱体材料更容易合成,进一步制备的磷酸铁锂正极材料具有更好的电化学性能.
Abstract
Lithium iron phosphate has the advantages of low cost,environmental friendliness,and high thermal stability,and is currently a highly promising positive electrode material.As a key influencing factor in the synthesis of lithium iron phosphate,the preparation process of iron phosphate precursor often uses purified iron salts to avoid the influence of impurities in iron ore.In order to optimize the preparation process of iron phosphate precursor and reduce costs,the one-step hydrothermal method from iron ore is used to prepare iron phosphate precursor,and the effects of different preparation processes on the conversion rate of iron and phosphorus,the structure of iron phosphate precursor,and the electrochemical performance of lithium iron phosphate batteries are analyzed in this paper.At higher concentrations of nitric acid and hydrothermal temperatures,precursor materials with high iron and phosphorus conversion rates are easier to synthesize,and further prepared lithium iron phosphate cathode materials have better electrochemical performance.
关键词
磷酸铁前驱体/铁矿/一步水热法/制备工艺/电化学性能Key words
iron phosphate precursor/iron ore/one-step hydrothermal method/preparation process/electrochemical performance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据