重量法测定碳包覆磷酸铁锂中磷的含量
Determination of Phosphorus in LiFePO4/C by Gravimetric Method
摘 要
采用重量法测定碳包覆磷酸铁锂中磷的含量.对比了灼烧除碳与过滤除碳前处理后以磷钼酸喹啉重量法测定碳包覆磷酸铁锂中的磷含量.优化的试验条件如下:① 样品经过滤除碳预处理;② 沉淀剂加入量为20 mL;③ 加热温度为90 ℃.方法用于碳包覆磷酸铁锂样品的测定,加标回收率在98.9%~99.8%之间,测定值的相对标准偏差(n=9)在0.30%~0.43%之间.
磷酸铁锂
磷
Gravimetric method
Lithium iron phosphate
Phosphorus
Abstract
Gravimetric method was applied to the determination of phosphorus in LiFePO4/C.Pretreatment methods of carbon removal by ashing and filtration were compared in determination of phosphorus in LiFePO4/C using quinoline phosphomolybdate gravimetric method.The optimized conditions found were as follows:① pretreatment method of carbon removal of sample:filtration;② amount of precipitant:20 mL;③ heating temperature:90 ℃.The proposed method was applied to the analysis of samples of LiFePO4/C,giving values of recovery and RSD′s (n=9) in the ranges of 98.9%-99.8% and 0.30%-0.43%,respectively.
中图分类号 O655.1 DOI 10.11973/lhjy-hx201508010
所属栏目 工作简报
基金项目 国家科技支撑计划备选项目(子项目)(2014BAC03B01);国家火炬计划项目(2013GH061426);广东省战略性新兴产业核心技术攻关项目(2011A032302001)
收稿日期 2014/8/8
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备注谢英豪(1987-),男,广东江门人,硕士,主要研究方向为新能源与资源循环利用.
引用该论文: XIE Ying-hao,YU Hai-jun,LI Jun-mao,LI Chang-dong. Determination of Phosphorus in LiFePO4/C by Gravimetric Method[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2015, 51(8): 1090～1092
谢英豪,余海军,黎俊茂,李长东. 重量法测定碳包覆磷酸铁锂中磷的含量[J]. 理化检验－化学分册, 2015, 51(8): 1090～1092
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参考文献
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【2】GAO Jian,LI Jian-jun,HE Xiang-ming,et al.Synthesis and electrochemical characteristics of LiFePO4/C cathode materials from different precursors[J].International Journal of Electrochemical Science,2011,6(7):2818-2825．
【3】SINHA N N,SHIVAKUMARA C,MUNICHANDRAIAH N.High rate capability of a dual-porosity LiFePO4/C composite[J].ACS Applied Materials & Interfaces,2010,2(7):2031-2038．
【4】郑明森,刘善科,孙世刚,等.Cu2+掺杂LiFePO4的制备及其电化学性能[J].电化学,2008,14(1):1-5．
【5】黄伟琴,李莉.快速测定磷酸氢钙中磷[J].理化检验-化学分册,2006,42(4):296-298．
【6】GB/T 10512-2008硝酸磷肥中磷含量的测定 磷钼酸喹啉重量法[S]．
【7】GB/T 1871.1-1995磷矿石和磷精矿中五氧化二磷含量的测定 磷钼酸喹啉重量法和容量法[S]．
【8】冯移丽,谢莉,冯奇.重量法测定催化剂中磷含量[J].分析试验室,2007,12(增1):74-77．
【9】赵宁,杨斌,段育岑,等.ICP-OES测定月季中矿质元素的五种前处理方法比较[J].光谱学与光谱分析,2011,31(8):2256-2258．
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