分离器(采油)
微球
材料科学
化学工程
工艺工程
物理
工程类
热力学
作者
Thi Luu Luyen Doan,Dinh Chuong Nguyen,R. Amaral,Nelson Y. Dzade,Cheol Sang Kim,Chan Hee Park
标识
DOI:10.1016/j.apcatb.2022.121934
摘要
This work develops a multifunctional separator, as trapper-catalyst-conductor, for Li-S batteries through modifying a Celgard separator by a novel hybrid comprising NiS 2 -MnS on a MoS 2 nanosheets/3D hollow N-doped graphene microsphere framework. Benefiting from the great adsorption ability of MoS 2 and NiS 2 -MnS for polysulfide species, the separator demonstrates high-efficiency polysulfide trapping. The ultrafine NiS 2 -MnS nanoparticles induce the developed separator to offer abundant catalytic active sites and efficient catalytic behavior for fast polysulfide redox. Furthermore, the super-structured N-doped 3D hollow graphene microsphere substrate can prevent both NiS 2 -MnS and MoS 2 from agglomeration phenomenon during the synthesis/operation process, while providing a highway for electron transportation to catalytic active sites. Importantly, the excellent mesoporous architecture of the coating material facilitates the diffusion of Li ion. Therefore, the Li-S battery constructed by the proposed separator shows a much higher performance and superior cycling stability than that of the cell using pristine Celgard separator. • A multifunctional separator, as trapper-catalyst-conductor, for Li-S batteries is introduced. • The separator shows good ability to trap polysulfides, catalyze their conversion, and efficiently transport electron. • The Li-S battery assembled by the separator shows a high performance and superior cycling stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI