文献类型：期刊文献

英文题名：Shortening the Reaction Pathway of Sulfur Redox Kinetics with 2,5-Dichloro-1,4-Benzoquinone to Minimize the Shuttle Effect in Lithium-Sulfur Batteries

作者：Shao, Jiayi Wang, Hanxiao Huang, Xinjie Ma, Xianguo Wang, Xuyun Huang, Hongsheng Ren, Jianwei Wang, Rongfang

第一作者：Shao, Jiayi

通信作者：Wang, RF[1];Ren, JW[2]

机构：[1]Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China;[2]Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Shandong Energy Inst, Qingdao New Energy Shandong Lab, Qingdao 266101, Peoples R China;[3]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[4]Univ Pretoria, Dept Chem Engn, ZA-0028 Hatfield, South Africa

第一机构：Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China

通信机构：corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China;corresponding author), Univ Pretoria, Dept Chem Engn, ZA-0028 Hatfield, South Africa.

年份：2025

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20251518192131);Scopus(收录号：2-s2.0-105001927929);WOS:【SCI-EXPANDED(收录号:WOS:001460231700001)】；

基金：The authors would like to express their gratitude for the financial support received from Natural Science Foundation of Guizhou Province (Grants No. QKHJC-ZK [2023] Key 019), Top Talent Project of Guizhou Provincial Department of Education (Grant No. QJJ [2022]084), and Key Laboratory of Energy Chemistry in Guizhou universities (Grants No. QJJ [2022]035).

语种：英文

外文关键词：insoluble symmetric cyclic organic polysulfide intermediates; shortened redox pathway; cathode-electrolyte interphase(CEI); shuttle effect; lithium-sulfur batteries

摘要：The low active material utilization, sluggish sulfur redox kinetics, and formation of unstable interfacial layers remain critical challenges in lithium-sulfur (Li-S) batteries. To minimize these effects, 2, 5-dichloro-1,4-benzoquinone (DCBQ) was demonstrated in this study as an electrolyte additive. Leveraging its unique symmetrical structure, DCBQ interacted with polysulfides during charge and discharge cycles to form insoluble symmetric cyclic organic polysulfide intermediates. These intermediates served as a cathode-electrolyte interphase (CEI) by attaching to the sulfur cathode surface, which mitigated the shuttle effect by reducing the accumulation of insoluble Li2S and suppressing polysulfide dissolution. In the presence of DCBQ, the discharge pathway for Li2S6 transitioned from Li2S6 -> Li2S4 -> Li2S2 -> Li2S to a shortened sequence of Li2S6 -> Li2S3 -> Li2S, enhancing sulfur utilization and streamlining redox processes. On the anode side, the formation of LiCl and intermediate compounds contributed to an organic-inorganic solid-electrolyte interface (SEI), which protected the lithium anode, improved the Li+ diffusion coefficient (6.63 x 10-11 cm2 S- 1), and eventually enhanced the battery's cycling stability. Consequently, the Li-S battery that included the DCBQ additive exhibited nearly 100% Coulombic efficiency at a rate of 0.2 C. It showed an initial discharge-specific capacity of 992.24 mAh g-1 and experienced a low-capacity degradation of just 0.45% per cycle over 120 cycles. These results highlight the effectiveness of DCBQ as an electrolyte additive in enhancing both the performance and stability of the battery.