High Performance Lithium-Sulfur Batteries Enabled by Co-N-C Modified Separators
A leaf-like cobalt-embedded nitrogen-doped carbon material(Co-N-C)is successfully synthesized and then modified on the commercial separator for Li-S batteries.The Co nanoparticles are uniformly dispersed in the prepared Co-N-C.With a large surface area and amounts of micropores,Co-N-C materials provide more active sites to trap soluble polysulfides in the cathode and effectively inhibit the shuttle effect caused by the dissolution of poly-sulfides.Meanwhile,the micro-nano structure in N-doped carbon is beneficial to accelerate ion transport and en-hance the redox reaction kinetics.Benefitting from the integrated adsorption-catalyzing effect,the Li-S cell con-structed with a Co-N-C modified separator exhibits a high capacity of 1408 mAh/g and excellent cycling stability(a low capacity fading rate of 0.05%per cycle after 400 cycles at 1 C).
国家科技期刊平台
NSTL
万方数据
