S/MCNT/Fe3O4正极材料制备及电化学性能研究
收稿日期: 2021-08-18
网络出版日期: 2022-06-22
基金资助
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）］
Study on preparation and electrochemical performance of S/MCNT/Fe3O4 cathode materials
Received date: 2021-08-18
Online published: 2022-06-22
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。
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
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.
| 1 | WANG Chao， YANG Jingjing， LI Taozhu，et al.In situ tuning of defects and phase transition in titanium dioxide by lithiothermic reduction［J］.ACS Applied Materials & Interfaces，2020，12（5）：5750-5758. |
| 2 | LI Na， GAN Fangyu， WANG Peng，et al.In situsynthesis of 3D sulfur?doped graphene/sulfur as a cathode material for lithium?sulfur batteries［J］.Journal of Alloys and Compounds，2018，754：64- 71 |
| 3 | CHUNG S H， CHANG Chihao， MANTHIRAM A.A core?shell |
| 3 | electrode for dynamically and statically stable Li-S battery chemistry［J］.Energy & Environmental Science，2016，9（10）：3188-3200. |
| 4 | CHUNG S H， MANTHIRAM A.Carbonized eggshell membrane as a natural polysulfide reservoir for highly reversible Li-S batteri? es［J］.Advanced Materials，2014，26（9）：1360-1365. |
| 5 | HU Anjun， ZHOU Mingjie， LEI Tianyu，et al.Optimizing redox reactions in aprotic lithium?sulfur batteries［J］.Advanced Energy Ma? terials，2020，10（42）.Doi：10.1002/aenm.202002180 . |
| 6 | HE Jiarui， CHEN Yuanfu， LI Pingjian，et al.Three?dimensional CNT/graphene?sulfur hybrid sponges with high sulfur loading as superior?capacity cathodes for lithium?sulfur batteries［J］.Journal of Materials Chemistry A，2015，3（36）：18605-18610. |
| 7 | HE Jiarui， CHEN Yuanfu， LV Weiqiang，et al.From metal?organic framework to Li2S@C-Co-N nanoporous architecture：A high?capacity cathode for lithium?sulfur batteries［J］.ACS Nano，2016，10（12）：10981-10987. |
| 8 | HE Jiarui， CHEN Yuanfu， LV Weiqiang，et al.Three-dimensional hierarchical reduced graphene oxide/tellurium nanowires：A high?performance freestanding cathode for Li-Te batteries［J］.ACS Nano，2016，10（9）：8837-8842. |
| 9 | HU Guangjian， SUN Zhenhua， SHI Chao，et al.A sulfur?rich Copolymer@CNT hybrid cathode with dual?confinement of polysulfides for high?performance lithium?sulfur batteries［J］.Advanced Materials，2017，29（11）.Doi：10.1002/adma.201603835 . |
| 10 | 宋娅，龙家英，庞驰，等.多级孔碳在锂硫电池正极中的研究进展［J］.无机盐工业，2021，53（6）：41-48. |
| 10 | SONG Ya， LONG Jiaying， PANG Chi，et al.Research progress of hierarchically porous carbon in the cathode of lithium?sulfur batteries［J］.Inorganic Chemicals Industry，2021，53（6）：41-48. |
| 11 | 王甲泰，郑思康，王雅蓉，等.碳材料在锂硫电池中的应用研究［J］.无机盐工业，2018，50（9）：1-6. |
| 11 | WANG Jiatai， ZHENG Sikang， WANG Yarong，et al.Study on application of carbon materials in lithium?sulfur batteries［J］.Inorganic Chemicals Industry，2018，50（9）：1-6. |
| 12 | HE Jiarui， LUO Liu， CHEN Yuanfu，et al.Yolk-shelled C@Fe3O4 nanoboxes as efficient sulfur hosts for high?performance lithium?sulfur batteries［J］.Advanced Materials，2017，29（34）.Doi：10 . |
| 12 | 1002/adma.201702707. |
| 13 | SEO S D， YU S， PARK S，et al.In situ conversion of metal?organic frameworks into VO2-V3S4 heterocatalyst embedded layered porous carbon as an “all?in?one” host for lithium?sulfur batteries［J］.Small，2020，16（47）.Doi：10.1002/smll.202004806 . |
| 14 | WANG Ruochen， LUO Chong， WANG Tianshuai，et al.Bidirectional catalysts for liquid?solid redox conversion in lithium?sulfur batteries［J］.Advanced Materials，2020，32（32）.Doi：10.1002/adma.202000315 . |
| 15 | XU Zhenglong， KIM S J， CHANG D，et al.Visualization of regulated nucleation and growth of lithium sulfides for high energy lithium sulfur batteries［J］.Energy & Environmental Science，2019，12（10）：3144-3155. |
| 16 | FANG Ruopian， ZHAO Shiyong， SUN Zhenhua，et al.More reliable lithium?sulfur batteries：Status，solutions and prospects［J］.Advanced Materials，2017，29（48）.Doi：10.1002/adma. 201606823 . |
| 17 | SEH Z W， SUN Yongming， ZHANG Qianfan，et al.Designing high?energy lithium?sulfur batteries［J］.Chemical Society Reviews，2016，45（20）：5605-5634. |
| 18 | DU Zhenzhen， CHEN Xingjia， HU Wei，et al.Cobalt in nitrogen?doped graphene as single?atom catalyst for high?sulfur content lithium?sulfur batteries［J］.Journal of the American Chemical Society，2019，141（9）：3977-3985. |
| 19 | LI Juan， XU Youlong， ZHANG Yuan，et al.Enhanced redox kinetics of polysulfides by nano?rod FeOOH for ultrastable lithium?sulfur batteries［J］.Journal of Materials Chemistry A，2020，8（37）：19544-19554. |
| 20 | LI Pengyue， LV Haowei， LI Zhonglin，et al.The electrostatic attraction and catalytic effect enabled by ionic?covalent organic nanosheets on MXene for separator modification of lithium?sulfur batteries［J］.Advanced Materials，2021，33（17）.Doi：10.1002/adma.202007803 . |
| 21 | KAZAZI M， VAEZI M R， KAZEMZADEH A.Improving the self?discharge behavior of sulfur?polypyrrole cathode material by LiNO3 electrolyte additive［J］.Ionics，2014，20（9）：1291-1300. |
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