文献类型：期刊文献

英文题名：1,3,6-Hexanetrinitrile as an electrolyte additive in lithium-sulfur batteries for the formation of high-performance cathode protection layer to achieve long cycle life

作者：You, Huijuan Zhang, Boshen Ji, Shan Linkov, Vladimir Wang, Xuyun Wang, Hui Wang, Rongfang Ma, Xianguo

第一作者：You, Huijuan

通信作者：Ma, XG[1];Ji, S[2];Wang, H[3]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China;[3]Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Shandong, Peoples R China;[4]Univ Western Cape, South African Inst Adv Mat Chem, ZA-7535 Cape Town, South Africa

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China;corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Shandong, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2026

卷号：95

外文期刊名：SURFACES AND INTERFACES

收录：;Scopus(收录号：2-s2.0-105039971225);WOS:【SCI-EXPANDED(收录号:WOS:001785193100001)】；

基金：The authors would like to thank to the Natural Science Foundation of Guizhou Province (Grants No QKHJC-ZK [2023] Key 019, Grants No QKHJC-ZD [2025] 038) for financially supporting this work.

语种：英文

外文关键词：Lithium-sulfur batteries; 6-hexanecarbonitrile; Sulfur cathode protective layer; Long cycle life

摘要：With rapid advances in portable electronics and electric vehicles, demand for electrochemical energy storage systems with higher capacity and longer lifespan has grown considerably. Lithium-sulfur (Li-S) batteries have attracted substantial research interest as a promising post-lithium-ion energy storage technology, primarily because of their remarkably high theoretical specific capacity. Currently, a key challenge for Li-S batteries lies in the polysulfide shuttle phenomenon, where soluble lithium polysulfides migrate between electrodes during charge-discharge cycles. This migration compromises cycling performance and poses a major barrier to commercial viability. Building a protective layer on the sulfur cathode has emerged as a facile and effective approach to mitigate this problem. In this study, 1,3,6-hexanetrinitrile (HTN) was employed as an electrolyte additive in Li-S batteries. Through the coordination between the cyano groups in HTN and the cobalt atoms in the cathode material, HTN adsorption onto the sulfur cathode surface was promoted, forming a stable protective cathodeelectrolyte interphase that effectively suppressed the diffusion of polysulfides into the electrolyte. Benefiting from this protective structure, the HTN-modified Li-S cell maintained a capacity retention of 73.7% after 120 cycles at 0.2 C. Furthermore, no polysulfide dissolution from the cathode was detected after one week of immersion in dimethyl ether solution. These findings offer a novel electrolyte engineering approach for improving cycling stability of Li-S batteries.