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摘要
为了得到循环稳定性和倍率性能优异的钛酸锂(LTO)负极材料,将质量浓度不同的氧化石墨烯与LTO材料进行物理混合,再通过热处理方法制备出还原氧化石墨烯包覆钛酸锂(LTO@rGO)复合材料。通过X射线粉末衍射仪、拉曼光谱仪、X射线光电子能谱仪、扫描电子显微镜和电化学工作站对复合材料的晶体结构、形貌和电化学性能进行表征和测试。结果表明:氧化石墨烯质量浓度为2mg/mL时,在电流密度为1C条件下,LTO@rGO复合材料初始比容量为168mAh/g,经过50次循环后容量为165.2mAh/g,具有优异的电化学性能。
Abstract
To obtain lithium titanate (LTO) anode materials with outstanding cycle stability and rate performance,physically blending graphene oxide with varying mass concentrations into LTO materials,followed by a heat treatment process,was employed to fabricate reduced graphene oxide-coated lithium titanate (LTO@rGO) composites.The crystal structure,morphology,and electrochemical properties of the composites were characterized and tested using X-ray powder diffractometry,Raman spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscopy,and an electrochemical workstation.The results indicated that when the mass concentration of graphene oxide was 2 mg/mL,the LTO@rGO composite exhibited an initial specific capacity of 168 mAh/g at a current density of 1C and retained a capacity of 165.2mAh/g after 50 cycles,demonstrating excellent electrochemical performance.
关键词
钛酸锂
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还原氧化石墨烯
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表面改性
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电化学性能
Key words
lithium titanate
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reduced graphene oxide
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surface modification
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electrochemical performance
还原氧化石墨烯包覆钛酸锂复合材料的制备及其电化学性能研究[J].
化工新型材料, 2025, 53(2): 182-186 DOI:10.19817/j.cnki.issn1006-3536.2025.02.011
[1] Zhang J,Wang Z,Zhuang J,et al.Facile synthesis of Li4Ti5O12/Graphene nanocomposites for high performance lithium-ion batteries via a thermal-decomposition reduction in air[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2017,529:677-685.
[2] Nelson R F.Power requirements for batteries in hybrid electric vehicles[J].Journal of Power Sources,2000,91(1):2-26.
[3] Tarascon J M,Armand M.Issues and challenges facing rechargeable lithium batteries[J].Nature,2001,414(6861):359-367.
[4] 卢苏阳,李绍敏,张根,等.锂离子电池钛基负极材料研究进展[J].化工新型材料,2023,51(12):39-43.
[5] Jing X,Wang Y,Zhang X,et al.Anchoring nitrogen-doped carbon particles on lithium titanate to enhance its lithium storage performance[J].Journal of Electroanalytical Chemistry,2020,871:114293.
[6] Chen Y,Zhang H,Li Y,et al.Electrochemical performance of Li4Ti5O12/carbon nanotubes/graphene composite as an anode material in lithium-ion batteries[J].International Journal of Hydrogen Energy,2017,42(10):7195-7201.
[7] 陈鹏翔.基于水热法的钛酸锂/还原石墨烯复合材料制备与性能研究[J].粘接,2020,41(3):11-14.
[8] Xue R,Yan J,Jiang L,et al.Fabrication of lithium titanate/graphene composites with high rate capability as electrode materials for hybrid electrochemical supercapacitors[J].Materials Chemistry and Physics,2015,160:375-382.
[9] 徐世伟,夏童,李刚,等.用于锂离子电池负极的钛酸锂/石墨烯筛复合材料制备及电化学性能[J].微纳电子技术,2021,58(6):476-483.
[10] 唐婷,何栋.钛酸锂/还原石墨烯复合材料制备与性能测试中水热法的应用[J].化学工程师,2020,34(8):81-83;34.
基金资助
国家自然科学基金(202210120005);新疆特种纺织材料的开发与应用研究天山创新团队(2017D14002);“双一流”背景下纺织工程专业硕士研究生创新成果评价体系改革探索(XJ2022GY07)
