从Hummers法产生的废物中有效提取Mn2+离子用于锂离子电池

IF 2.7 4区工程技术 Q3 ELECTROCHEMISTRY

Journal of Electrochemical Energy Conversion and Storage Pub Date : 2022-06-13 DOI:10.1115/1.4054780

Hongying Hou, Li Junkai, Jian Lan, Kun Meng, Baoxiang Huang, Hao Li

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引用次数: 0

摘要

石墨烯纳米片是用Hummers法大量生产的，同时排放含Mn2+的废酸废水，应合理回收。在此，通过氧化沉淀将Mn2+提取到Mn3O4纳米颗粒中。优选地，Mn3O4粉末为尖晶石晶相，并且颗粒尺寸为100-150nm。Mn3O4阳极的可逆放电容量在0.5A/g下维持528mAh/g达100次循环，在1.0A/g下保持423mAh/g长达300次循环，容量保持率分别为93.4%和91.1%。显然，这项工作可能会促进循环经济的发展。

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Efficient extraction of Mn2+ ions from the waste produced in the Hummers method for application in Li-ion batteries

Graphene nanosheets are produced in mass by Hummers method, accompanied with the emission of waste acid effluent with Mn2+, which should be reasonably recycled. Herein, Mn2+ was extracted into Mn3O4 nanoparticles by oxidation precipitation. Desirably, Mn3O4 powders were the spinel crystal phase and the particle size was 100-150 nm. The reversible discharge capacities of Mn3O4 anode maintained 528 mAh/g at 0.5 A/g for 100 cycles and 423 mAh/g at 1.0 A/g for 300 cycles, with high capacity retention ratios of 93.4 % and 91.1 %, respectively. Obviously, this work may promote the development of the circular economy.

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来源期刊

Journal of Electrochemical Energy Conversion and Storage Engineering-Mechanics of Materials

CiteScore

4.90

自引率

4.00%

发文量

期刊介绍： The Journal of Electrochemical Energy Conversion and Storage focuses on processes, components, devices and systems that store and convert electrical and chemical energy. This journal publishes peer-reviewed archival scholarly articles, research papers, technical briefs, review articles, perspective articles, and special volumes. Specific areas of interest include electrochemical engineering, electrocatalysis, novel materials, analysis and design of components, devices, and systems, balance of plant, novel numerical and analytical simulations, advanced materials characterization, innovative material synthesis and manufacturing methods, thermal management, reliability, durability, and damage tolerance.