High entropy sulfide(HES)exhibits high catalytic activity and structural stability due to the synergistic effect and high entropy effect of various metals.However,the conventional approach for synthesizing HES typical...High entropy sulfide(HES)exhibits high catalytic activity and structural stability due to the synergistic effect and high entropy effect of various metals.However,the conventional approach for synthesizing HES typically necessitates elevated temperatures to ensure homogeneous blending of multiple elements,which directly results in nanoparticle agglomeration and unsatisfactory electrochemical performance.Herein,we propose the HES as a novel separator modifier for lithium–sulfur batteries,which overcomes the limited adsorption-catalytic synergy of conventional single metal sulfides.Ultrafine FeCoNiCrMnS₂nanospheres(HES NSs)are synthesized via a facile template method,where the multi-metal synergy enables simultaneous suppression of polysulfide shuttling and acceleration of redox kinetics.The ultrafine HES nanocrystals can expose a sufficient number of active sites,which serve as an efficient LiPSs barrier to inhibit side reactions and as an additional collector to enhance the polysulfide redox reaction.As a result,the battery employing HES//PP separators exhibits outstanding cycle stability(906.8 mA h g⁻¹at 1.0 C after 1000 cycles).This study not only showcases the potential application of HES as a separator modifier for Li–S batteries but also provides novel insights into exploring other high-entropy materials.展开更多
基金supported by the National Natural Science Foundation of China(Grant no.22172023,22305032 and 22275031)China Postdoctoral Science Foundation(2022M710653)+4 种基金the Jilin Provincial Research Foundation for Basic Research(20230101049JC and 20190201218JC)the Fundamental Research Funds for the Central Universities(2412022XK012 and 2412022QD006)Science and Technology Research Project of the Education Department of Jilin Province(JJKH20221157KJ and JJKH20221156KJ)the development of Science and Technology of Jilin Province(YDZJ202301ZYTS294)the Science and Technology Project of Jilin Provincial Department of Education(JJKH20230374KJ).
文摘High entropy sulfide(HES)exhibits high catalytic activity and structural stability due to the synergistic effect and high entropy effect of various metals.However,the conventional approach for synthesizing HES typically necessitates elevated temperatures to ensure homogeneous blending of multiple elements,which directly results in nanoparticle agglomeration and unsatisfactory electrochemical performance.Herein,we propose the HES as a novel separator modifier for lithium–sulfur batteries,which overcomes the limited adsorption-catalytic synergy of conventional single metal sulfides.Ultrafine FeCoNiCrMnS₂nanospheres(HES NSs)are synthesized via a facile template method,where the multi-metal synergy enables simultaneous suppression of polysulfide shuttling and acceleration of redox kinetics.The ultrafine HES nanocrystals can expose a sufficient number of active sites,which serve as an efficient LiPSs barrier to inhibit side reactions and as an additional collector to enhance the polysulfide redox reaction.As a result,the battery employing HES//PP separators exhibits outstanding cycle stability(906.8 mA h g⁻¹at 1.0 C after 1000 cycles).This study not only showcases the potential application of HES as a separator modifier for Li–S batteries but also provides novel insights into exploring other high-entropy materials.
