祝宏帅,孙金峰,胡启阳,李新海,赵隽,孟永强

• 1:河北科技大学材料科学与工程学院
• 2:中南大学冶金与环境学院

摘要(Abstract)：

以H_3PO_4-H2O_2溶液对除铝后的失效磷酸铁锂电池正极材料进行浸出锂实验,采用ICP-OES测定浸出液中Li+和Fe3+浓度,研究了H2O_2及H_3PO_4加入量、液固质量比(L/S)、反应温度、搅拌转速、反应时间及体系终态pH值对Li浸出率的影响,并对终态pH值为3.5得到的滤渣进行XRD分析,结果表明,Li浸出率随H2O_2及H_3PO_4加入量的增加而增大,但当H2O_2与H_3PO_4用量分别高于1.2倍、1.1倍反应计量时,锂浸出率增速趋缓;随着液固质量比的增大,Li浸出率呈现先增大后减小的趋势;在30~60℃反应温度对Li浸出率影响不明显;Li浸出率随搅拌转速的提高和反应时间的延长而增大,但搅拌转速高于30 r×min~(-1)、反应时间超过3.0 h后Li浸出率变化不明显;体系终态pH为3.5时,锂浸出率为99.21%、铁沉淀率为99.99%,浸出渣为Fe PO_4·2H2O。

关键词(KeyWords)： 磷酸铁锂电池;锂铁分离;选择性浸取;锂电池回收

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”科技支撑项目(2015BAB06B00)

作者(Author): 祝宏帅,孙金峰,胡启阳,李新海,赵隽,孟永强

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