石墨烯生产废液中双球状碳酸锰的提取及其电化学储锂性能  

Extraction and electrochemical lithium storage performances of double-spheroid manganous carbonate from graphene production waste effluent

作　　者：侯宏英[1] 贾彦鹏 李俊凯 兰建 陈方淑[2] HOU Hongying;JIA Yanpeng;LI Junkai;LAN Jian;CHEN Fangshu(Faculty of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Law School,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]昆明理工大学法学院,昆明650093

出　　处：《有色金属科学与工程》2024年第1期8-14,共7页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(52263010);云南省第十九批学术技术带头人项目(1097-10978240)。

摘　　要：根据“双碳”目标和循环经济的要求,废弃物务必应收尽收。鉴于此,以Na2CO_(3)为沉淀剂,通过一步化学沉淀反应从石墨烯生产废液中提取了淡黄色MnCO_(3)粉末,并研究其电化学储锂性能。结果表明,废液中Mn离子的去除率为99.9%,MnCO_(3)粉末的回收率为92.6%。MnCO_(3)粉末由0.5~1.5μm的双球状颗粒组成,属于六方晶系;MnCO_(3)负极在0.5 A/g和1.0 A/g分别循环300圈后,其可逆放电容量分别为570 mAh/g和418 mAh/g。本文的研究结果为回收石墨烯工业废水提供了新思路,有助于降低环境污染排放。According to the“double carbon”targets and circular economy,various wastes must be recycled as much as possible.Therefore,manganous ions in the waste effluent from graphene production were extracted with Na2CO_(3)as the precipitation agent by one-step chemical reaction,forming light yellow MnCO_(3)powder.Meanwile,its electrochemical lithium storage properties were studied.The results show that the removal rate of manganous ions is 99.9%and the recovery rate of MnCO_(3)is 92.6%.The extracted MnCO_(3)powders consist of many double spheroids with a particle size of 0.5-1.5μm,which belong to the hexagonal crystalline.After cycling for 300 cycles at 0.5 A/g and 1.0 A/g,the corresponding reversible capacity is maintained at about 570 mAh/g and 418 mAh/g,respectively.This article provides a new idea for the recovery of graphene industrial wastewater,helping to reduce environmental emissions.

关 键 词：循环经济 石墨烯生产废液 碳酸锰 负极材料 

分 类 号：O646[理学—物理化学]