Staged dendrite suppression for high safe and stable lithium-sulfur batteries  

作　　者：Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu 

机构地区：[1]Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China [2]Jiangsu Pylon Battery Co.Ltd,Yangzhou 211400,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2025年第1期674-683,共10页能源化学(英文版)

基　　金：National Natural Science Foundation of China (Grant 52372083, 52173255);Opening Project of the Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials (JSKC24025);Special Funds for the Trans-formation of Scientific and Technological Achievements in Jiangsu Province(BA2023003);Collaborative Innovation Center for Advanced Micro/nanomaterials and Equipment (Co-constructed by Jiangsu Province and Ministry of Education)。

摘　　要：The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur batteries.Herein,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene (PP) separator.The uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition stage.Most importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance(145.88 MPa) of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium dendrite.The Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm^(-2)with a polarization voltage of only 29.3 mV.Additionally,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity attenuation.The improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关 键 词：Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]