| S/MCNT/Fe3O4正极材料制备及电化学性能研究 |
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| 引用本文： | 邱志旭,朱绍宽,魏宇霄,龙家英,黄东创,邵姣婧. S/MCNT/Fe3O4正极材料制备及电化学性能研究[J]. 无机盐工业, 2022, 54(6): 73-77. DOI: 10.19964/j.issn.1006-4990.2021-0498 |
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| 作者姓名： | 邱志旭 朱绍宽 魏宇霄 龙家英 黄东创 邵姣婧 |
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| 作者单位： | 1.贵州大学材料与冶金学院，贵州 贵阳 5500252.先进电池与材料工程研究中心，贵州省轻工 职业技术学院3.贵州省普通高等学校石墨烯材料工程研究中心 |
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| 基金项目： | 国家自然科学基金项目(51972070);贵州省科技计划项目重点类型(黔科合基础［2020］1Z042);贵州省科技支撑项目（黔科合支撑［2021］一般317）;贵州大学培育项目(贵大培育［2019］01号);大学生创新创业训练计划项目［贵大国创字2019（001）］ |
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| 摘 要： | 锂硫电池因具备高的理论能量密度而引起研究者的广泛关注，但是其实际能量密度仍受限于硫的低电导率及其中间产物多硫化物的“穿梭效应”等因素。为解决以上问题，通过熔硫法将正极活性物质硫负载于多壁碳纳米管的多孔网络骨架中，进一步通过研磨法将其与极性氧化物四氧化三铁复合，制得硫/多壁碳纳米管/四氧化三铁（S/MCNT/Fe3O4）正极材料。基于该正极材料组装的锂硫电池，在1C倍率下具有高达908.6 mA·h/g的初始放电比容量，循环250圈后每圈容量衰减率为0.2%，平均库伦效率约为99%，当倍率提高到3C时仍具有636.5 mA·h/g的比容量，表现出优良的倍率性能。
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| 关 键 词： | 锂硫电池 正极材料 四氧化三铁 多硫化物 |
| 收稿时间： | 2021-08-18 |
Study on preparation and electrochemical performance of S/MCNT/Fe3O4 cathode materials |
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| QIU Zhixu,ZHU Shaokuan,WEI Yuxiao,LONG Jiaying,HUANG Dongchuang,SHAO Jiaojing. Study on preparation and electrochemical performance of S/MCNT/Fe3O4 cathode materials[J]. Inorganic Chemicals Industry, 2022, 54(6): 73-77. DOI: 10.19964/j.issn.1006-4990.2021-0498 |
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| Authors: | QIU Zhixu ZHU Shaokuan WEI Yuxiao LONG Jiaying HUANG Dongchuang SHAO Jiaojing |
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| Affiliation: | 1.School of Materials and Metallurgy，Guizhou University，Guiyang 550025，China2.Advanced Batteries and Materials Engineering Research Center，Guizhou Light Industry Technical College3.Graphene Materials Engineering Research Center of Guizhou Colleges and Universities |
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| Abstract: | Lithium?sulfur battery has attracted extensive attention from researchers due to the high theoretical energy density，but the actual energy density is still limited by the low conductivity of sulfur and the shuttle effect of the intermediate polysulfides，etc.To solve these issues，herein sulfur was loaded onto multi?walled carbon nanotube with the porous framework formed through sulfur melting method，followed by compounding it with the polar oxide ferroferric oxide via grinding method to finally obtain the as?prepared sulfur/multi?walled carbon nanotube/ferroferric oxide（S/MCNT/Fe3O4） cathode materials.The lithium sulfur battery assembled based on this cathode material had an initial discharge specific capacity of up to 908.6 mA·h/g at 1C rate.After 250 cycles，the capacity decay rate per cycle was 0.2% and the average coulomb efficiency was about 99%.When the current density was increased to 3C，it still had a capacity of 636.5 mA·h/g，exhibiting excellent rate performance. |
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| Keywords: | lithium?sulfur batteries cathode materials ferroferric oxide polysulfides |
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