出菇次数调控菌糠基碳孔隙结构与载硫电极储锂性能分析  

Analysis of harvest number on microstructure and electrochemical performance of mushroom culture residue derived porous carbon in lithium-sulfur battery

作　　者：燕映霖 杨媛媛 谢易桂 韦卓含 赵颖娟 邹一鸣 冯祖飞 杨蓉 Yan Yinglin;Yang Yuanyuan;Xie Yigui;Wei Zhuohan;Zhao Yingjuan;Zou Yiming;Feng Zufei;Yang Rong(School of Science of Xi'an University of Technology,Xi'an 710048,China;School of Materials Science and Engineering of Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学理学院,西安710048 [2]西安理工大学材料科学与工程学院,西安710048

出　　处：《农业工程学报》2022年第23期195-202,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：中国博士后基金资助项目(2019M653706);陕西省自然科学基础研究计划资助项目(2021GY-151);陕西省教育厅自然科学专项资助项目(21JK0798);咸阳市科技局重点研发项目(2021ZDYF-GY-0029)。

摘　　要：针对食用菌培养基废弃物(菌糠)的资源浪费与环境污染问题,该研究提出以不同出菇次数菌糠为原材料,高温碳化制备系列菌糠基多孔碳,并应用于锂硫电池正极中作为碳骨架材料,探究出菇次数对孔隙结构和电化学储锂性能的影响。结果表明,出菇1次菌糠基多孔碳为蜂窝状网络结构,出菇3次菌糠基多孔碳为小颗粒状;出菇0、1、3次菌糠基多孔碳比表面积分别为147.54、270.88和258.39 m^(2)/g;出菇1次菌糠基多孔碳具有完整导电网络,载硫后相对于出菇0、3次菌糠基,表现出最高的可逆比容量(916.81 mAh/g)和较好的动力学性能。出菇1次菌糠基多孔碳经KOH活化后,获得具有发达三维孔道的海绵状多孔碳(AMRC-Ⅰ),比表面积增大为1591.06 m^(2)/g,孔径2~5 nm的介孔比例为88.03%,初始放电比容量为1111.31 mAh/g,100次循环后保持355.99 mAh/g的可逆比容量,循环更加稳定。该研究表明出菇次数可以调控菌糠基多孔碳的微观结构,进而影响载硫正极的电化学储锂性能,可为菌糠废弃物的高价值利用提供新思路。A large amount of culture medium waste(mushroom residue)has been produced each year,particularly from the edible mushroom as the most common dish on the dining-table in the global nowadays.The current discarding or burning disposal of the mushroom residue cannot be fully met the large-scale production at present,leading to the environmental pollution and waste of resources.Therefore,the recycling utilization of mushroom residue can be generally preferred for the important economic value and environmental protection.It is extremely urgent to develop the high-value processing for the mushroom residue now.Alternatively,the biomass derived carbon materials can be the great application potential to the electrochemical energy storage devices,such as lithium,sodium,lithium-sulfur(Li-S)ion batteries.Among them,the Li-S battery can be expected to serve as the promising next-generation power battery system,due to the ultrahigh theoretical capacity and energy density.Thus,the biomass derived carbon materials with unique porous microstructure can pose the great influence on the electrochemical performance of Li-S battery.Taking the used waste culture residue of oyster mushroom as the raw material,this study aims to fabricate the porous carbon materials for the conductive skeleton in the cathode materials of Li-S battery.A systematic investigation was firstly implemented to determine the effects of cultural batch of edible oyster mushroom and KOH activation on the microstructure and structural evolution of the mushroom residue derived carbon materials.A high-value recycling of edible mushrooms culture medium waste was then constructed for the new kind of the cathode materials resource in the Li-S battery.A series of porous carbon materials with the different porous structures were successfully prepared from the different cultural residues after various culture batches.Furthermore,the KOH-assisted high-temperature carbonization was also used to optimize the porous structure.Finally,the elemental sulfur(S)was melted to integrat

关 键 词：碳化 生物质 比表面积 出菇次数 菌糠 高介孔率 锂硫电池 

分 类 号：TQ152[化学工程—电化学工业] S210.3[农业科学—农业机械化工程]