Efficient separation of impurities from pyrolusite and the enhancement of its products for improving the performance of lithium-ion batteries

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere Pub Date : 2025-09-01 DOI:10.1016/j.chemosphere.2025.144596

Riran Zang , Houyang Chen , Shuxian Shi , Man mo , Dawei Lan , Guangliang Zhang , Yangxian Huang , Kunsong Hu , Xinghua Liang , Lingxiao Lan , Yong Yang , Junji Li , Liyun Zhang , Chunxia Li , Haiqing Zhan , Xianquan Ming , Zhipeng Li , Zhijie Fang , Feng Zhan

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引用次数: 0

Abstract

Manganese sulfate is a derivative of manganese resources with multiple applications. In addition to its traditional uses, it plays a critical role in various environmental and energy sectors. Manganese sulfate not only contributes to water treatment but also plays a significant role in the production of lithium-ion battery materials. This paper presents an innovative method for the efficient reduction and leaching of low-grade pyrolusite to produce high-purity monohydrate manganese sulfate (MnSO₄·H₂O) crystals, utilizing pyrite (FeS₂) as the reducing agent. This method not only enhances the production process and reduces costs, but also enables the production of high-purity monohydrate manganese sulfate crystals through the recrystallization of leachate, thus achieving the dilution heat of sulfuric acid and the recovery of wastewater. The high-purity MnSO₄·H₂O crystals produced by this method facilitate the preparation of LiFe_0.5Mn_0.5PO₄/C lithium-ion cathode materials, which exhibit superior performance and efficiency compared to their industrial counterparts. This research advances the sustainable production of battery materials, promotes the utilization of low-grade manganese ore, contributes significantly to environmental protection and sustainable energy development, and supports the diverse applications of manganese sulfate in environmental protection technologies.

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软锰矿中杂质的有效分离及其产品的改进对锂离子电池性能的提高

硫酸锰是锰资源的衍生物，具有多种用途。除了其传统用途外，它在各种环境和能源部门发挥着关键作用。硫酸锰不仅有助于水处理，而且在锂离子电池材料的生产中也起着重要作用。提出了一种以黄铁矿（FeS2）为还原剂，对低品位软锰矿进行高效还原浸出制备高纯度一水硫酸锰（MnSO4·H2O）晶体的创新方法。该方法不仅提高了生产工艺，降低了成本，而且可以通过渗滤液的重结晶生产出高纯度的一水硫酸锰晶体，从而实现硫酸的稀释热和废水的回收。该方法制备的高纯度MnSO4·H2O晶体有利于制备LiFe0.5Mn0.5PO4/C锂离子正极材料，与工业上的同类材料相比，具有优越的性能和效率。本研究推进了电池材料的可持续生产，促进了低品位锰矿石的利用，为环境保护和能源可持续发展做出了重要贡献，支持了硫酸锰在环保技术中的多样化应用。

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来源期刊

Chemosphere 环境科学-环境科学

CiteScore

15.80

自引率

8.00%

发文量

4975

审稿时长

3.4 months

期刊介绍： Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.