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Bifunctional Li2Se Mediator to Accelerate Sulfur Conversion and Lithium Deposition Kinetics in Lithium-Sulfurized Polyacrylonitrile Batteries

文献类型：期刊论文

作者Wu, Qiang1; Ma, Fenfen2; Zhang, Wei1; Yan, Hui3; Chen, Xin2; Cheng, Shijie1; Xie, Jia1
刊名ACS APPLIED ENERGY MATERIALS
出版日期2023-06-21
卷号6期号:13页码:7138-7146
关键词lithium selenide redox mediator kinetics lithium metal lithium-sulfur battery
ISSN号2574-0962
DOI10.1021/acsaem.3c00815
通讯作者Chen, Xin(mail.xinchen@gmail.com) ; Xie, Jia(xiejia@hust.edu.cn)
英文摘要Lithium-sulfur (Li-S) batteries are oneof the mostprospective high-energy-density secondary batteries with ultrahighenergy density and low cost. Sulfurized polyacrylonitrile (SPAN) witha unique chemical structure and satisfactory electronic conductivityproves to be a promising sulfur cathode material. Nevertheless, theapplication of Li-SPAN batteries is severely limited by sluggishsulfur kinetics and uncontrollable Li deposition, resulting in poorcycling in ether-based electrolytes. Herein, a dual-functional electrolyteadditive, lithium selenide (Li2Se), is proposed. For asulfur cathode, Li2Se will continuously attack the S-Sbonds of polysulfides, forming more reactive S-Se bonds withlowered reaction energy barriers and accelerating the kinetics. Fora lithium anode, Li2Se is conducive for Li+ transportationand forms a stable selenide-containing organic-inorganic hybridsolid electrolyte interphase (SEI), which lowers the nucleation overpotentialand enhances exchange current density for Li deposition. Resultantly,the Li2Se-assisted Li-SPAN battery shows ultrahighdischarge capacities, enhanced rate performance, and outstanding cyclingstability (an initial capacity of 1516 mAh g(-1) at2C and 600 mAh g(-1) after 500 cycles). Noticeably,it delivers an areal capacity of 10.3 mAh cm(-2) undera high cathode loading of 12.0 mg cm(-2). This workdemonstrates a promising dual-functional additive to advance the performanceof Li-SPAN batteries.
资助项目National Natural Science Foundation of China[52207237] ; National Natural Science Foundation of China[21975087] ; Science, Technology and Innovation Commission of Shenzhen Municipality[CJGJZD20210408092200002] ; Analytical and Testing Center of HUST
WOS研究方向Chemistry ; Energy & Fuels ; Materials Science
语种英语
WOS记录号WOS:001016691400001
出版者AMER CHEMICAL SOC
资助机构National Natural Science Foundation of China ; Science, Technology and Innovation Commission of Shenzhen Municipality ; Analytical and Testing Center of HUST
源URL[http://ir.imr.ac.cn/handle/321006/178369]  
专题金属研究所_中国科学院金属研究所
通讯作者Chen, Xin; Xie, Jia
作者单位1.Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China
2.GuSu Lab Mat, Suzhou 215123, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Qiang,Ma, Fenfen,Zhang, Wei,et al. Bifunctional Li2Se Mediator to Accelerate Sulfur Conversion and Lithium Deposition Kinetics in Lithium-Sulfurized Polyacrylonitrile Batteries[J]. ACS APPLIED ENERGY MATERIALS,2023,6(13):7138-7146.
APA Wu, Qiang.,Ma, Fenfen.,Zhang, Wei.,Yan, Hui.,Chen, Xin.,...&Xie, Jia.(2023).Bifunctional Li2Se Mediator to Accelerate Sulfur Conversion and Lithium Deposition Kinetics in Lithium-Sulfurized Polyacrylonitrile Batteries.ACS APPLIED ENERGY MATERIALS,6(13),7138-7146.
MLA Wu, Qiang,et al."Bifunctional Li2Se Mediator to Accelerate Sulfur Conversion and Lithium Deposition Kinetics in Lithium-Sulfurized Polyacrylonitrile Batteries".ACS APPLIED ENERGY MATERIALS 6.13(2023):7138-7146.

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来源：金属研究所

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