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.
作者
侯宏英
贾彦鹏
李俊凯
兰建
陈方淑
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)
出处
《有色金属科学与工程》
CAS
北大核心
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)。
关键词
循环经济
石墨烯生产废液
碳酸锰
负极材料
circular economy
waste effluent from graphene production
manganous carbonate
cathode material
作者简介
通信作者:侯宏英(1971-),教授,博士生导师,从事新能源材料的研究。E-mail:hongyinghou@kust.edu.cn。
