高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

柔性TiO2-TiSe2/纳米碳纤维膜提升锂/硫电池倍率性能研究

党宇鑫,秦小茜,张鹏,麻天舒,薛嘉仪,王朝,吴桐,张莹莹,刘景海   

  1. 内蒙古固体化学与电池重点实验室; 锂硫电池储能内蒙古自治区工程研究中心；内蒙古民族大学化学与材料学院
  • 收稿日期:2025-11-07 修回日期:2025-12-09 网络首发:2025-12-17 发布日期:2025-12-17
  • 通讯作者: 刘景海 E-mail:jhliu2015@imun.edu.cn
  • 基金资助:
    国家自然科学基金（编号： 22361035，22461030）；内蒙古自然科学基金（编号： 2024QN02013）；内蒙古草原英才-青年领军人才计划（编号： KYCYYC24001，KYCYYC25002）；自治区级事业单位引进优秀人才和科研启动绩效项目（编号： RCQD20002）；内蒙古民族大学博士科研基金（编号： KYQD21002、KYQD23005）；内蒙古自治区直属高校基本科研业务费项目(编号： GXKY25Z009)；内蒙古自治区高校创新团队计划（编号： NMGIRT2417）；内蒙古自治区重点实验室创新平台建设项目（编号： KJJH2402, SYS25003）；内蒙古自然科学基金重点联合项目（编号： 2025ZDLH004）；内蒙古自治区提质培育学科（化学）；无机合成与制备化学国家重点实验室开放资金资助（25-11）；锂硫电池储能内蒙古自治区工程研究中心开放课题项目（MDK2024057）

Flexible TiO2-TiSe2/carbon nanofibre membranes to enhance the multiplicity performance of lithium/sulfur batteries

DANG Yuxin, QIN Xiaoxi, ZHANG Peng, MA Tianshu, XUE Jiayi, WANG Chao, WU Tong, ZHANG Yingying, LIU Jinghai   

  1. Inner Mongolia Key Laboratory of Solid State chemistry for Battery; Inner Mongolia Engineering Research Centre of Lithium-Sulfur Battery Energy Storage, College of Chemistry and Materials Science, Inner Mongolia Minzu University
  • Received:2025-11-07 Revised:2025-12-09 Online First:2025-12-17 Published:2025-12-17
  • Contact: Liu Jinghai E-mail:jhliu2015@imun.edu.cn
  • Supported by:
    Supported by National Natural Science Foundation of China (Grant Nos. 22361035, 22461030); Natural Science Foundation of Inner Mongolia Autonomous Region (Grant No. 2024QN02013); Inner Mongolia Grassland Talent Program – Young Leading Talents (Grant Nos. KYCYYC24001, KYCYYC25002); Autonomous Region-level Institution Talent Introduction and Scientific Research Start-up Performance Project (Grant No. RCQD20002); Doctoral Scientific Research Fund of Inner Mongolia Minzu University (Grant Nos. KYQD21002, KYQD23005); Basic Scientific Research Operating Expenses Project of Directly Affiliated Universities in Inner Mongolia Autonomous Region (Grant No. GXKY25Z009); Innovation Team Program of Universities in Inner Mongolia Autonomous Region (Grant No. NMGIRT2417); Innovation Platform Construction Project of Key Laboratories in Inner Mongolia Autonomous Region (Grant Nos. KJJH2402, SYS25003); Key Joint Project of Natural Science Foundation of Inner Mongolia Autonomous Region (Grant No. 2025ZDLH004); Quality Improvement and Cultivation Discipline of Inner Mongolia Autonomous Region (Chemistry); Open Fund of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Grant No. 25-11); Open Project of the Lithium-Sulfur Battery Energy Storage Engineering Research Center of Inner Mongolia Autonomous Region (No. MDK2024057)

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摘要： 锂硫电池因其理论能量密度高和正极活性物质资源丰富等巨大优势而备受关注。然而，严重的多硫化锂穿梭效应和缓慢的电化学转换动力学严重阻碍了高能量密度、高倍率性能锂硫电池的发展。为解决上述问题，制备了柔性导电TiO2-TiSe2/纳米碳纤维膜（TiO2-TiSe2/CNF），将其置于锂硫电池正极侧与隔膜之间作为膜反应器来调控锂硫转换。实验表明，TiO2-TiSe2活性位对多硫化锂的强吸附作用能有效抑制穿梭效应，纳米碳纤维网络加速离子和电子的传输，增强了反应动力学。结果表明，TiO2-TiSe2/CNF膜反应器调制锂硫电池在0.1C初始放电比容量达1305.7 mAh/g，在5C倍率下放电比容量达684.7 mAh/g，在1C时循环200次后放电比容量保持在795.4 mAh/g。

关键词: TiO2-TiSe2/纳米碳纤维膜, 锂硫电池, 高倍率性能, 膜反应器, 锂硫反应动力学

Abstract: Lithium-sulfur batteries have garnered significant attention due to their substantial advantages, including high theoretical energy density and abundant cathode active material resources. However, severe lithium polysulphide shuttle effects and sluggish electrochemical conversion kinetics significantly impede the development of lithium-sulfur batteries with high energy density and high-rate performance. To address these challenges, a flexible conductive TiO2-TiSe2/carbon nanofibre (TiO2-TiSe2/CNF) membrane was fabricated. Positioned between the cathode and separator in lithium-sulfur batteries as a membrane reactor, it regulates lithium-sulfur conversion. Experiments demonstrate that the strong adsorption of lithium polysulphides by TiO2-TiSe2 active sites effectively suppresses the shuttle effect, while the nano-carbon fibre network accelerates ion and electron transport, enhancing reaction kinetics. Results indicate that the TiO2-TiSe2/CNF membrane reactor modulated lithium-sulfur battery achieved an initial discharge specific capacity of 1305.7 mAh/g at 0.1C, a discharge capacity of 684.7 mAh/g at 5C, and maintained a discharge capacity of 795.4 mAh/g after 200 cycles at 1C.

Key words: TiO2-TiSe2 nanofiber membrane reactor, Lithium-sulfur battery, High magnification performance, membrane reactor, lithium-sulfur reaction kinetics

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