Preparation of λ-MnO2 catalyst from spent LiMn2O4-based lithium-ion battery

ZHANG Weixin; MA Shichuang; YANG Zeheng; ZHOU Chenxu; WANG Qiang

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Preparation of λ-MnO₂ catalyst from spent LiMn₂O₄-based lithium-ion battery

更新时间：2025-12-10

- Preparation of λ-MnO₂ catalyst from spent LiMn₂O₄-based lithium-ion battery
- CIESC Journal Issue 5, Pages: 1181-1185(2009)
- 作者机构：
  
  合肥工业大学化工学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 May 2009，
  
  Published：05 May 2009
- 稿件说明：
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ZHANG Weixin, MA Shichuang, YANG Zeheng, et al. Preparation of λ-MnO₂ catalyst from spent LiMn₂O₄-based lithium-ion battery[J]. CIESC Journal, 2009, (5): 1181-1185.
DOI：

ZHANG Weixin, MA Shichuang, YANG Zeheng, et al. Preparation of λ-MnO₂ catalyst from spent LiMn₂O₄-based lithium-ion battery[J]. CIESC Journal, 2009, (5): 1181-1185. DOI：

摘要

以废旧锰酸锂（LiMn2O4）电池的正极活性材料为原料，通过酸浸脱锂原位转化获得锰氧化物，X射线衍射（XRD）分析表明所得样品为立方晶系的λ-MnO2 。实验考察了所制备的λ-MnO2 对乙酸和异戊醇合成乙酸异戊酯的酯化反应的催化活性，并探讨了酸浸过程的酸浓度和反应时间对λ-MnO2 催化性能的影响。在室温条件下，当硫酸浓度为0.5 mol·L-1，反应时间为3 h时，所得λ-MnO2 催化乙酸异戊酯酯化反应的酯化率高达94.62%。分别采用红外光谱和气相色谱对酯化产物进行了鉴定。结果表明，λ-MnO2 催化剂对合成乙酸异戊酯反应具有很好的选择性。

Abstract

Manganese oxide was obtained by selective chemical leaching of lithium ion out from the spent LiMn2O4 electrode materials and in-situ phase transformation.The prepared manganese oxide was characterized by X-ray power diffraction (XRD) and showed cubic λ-MnO2.The λ-MnO2 powder was found to be an effective catalyst for the synthesis of iso-amyl acetate from acetic acid and iso-amyl alcohol.The reaction results showed that when the leaching sulfuric acid concentration was 0.5 mol·L-1 and reaction time was 3 h

λ-MnO2 showed the best catalytic activity and excellent selectivity for esterification of iso-amyl acetate(yield 94.62%).

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