Lithium-sulfur batteries attract lots of attention due to their high specific capacity,low cost,and environmental friendliness.However,the low sulfur utilization and short cycle life extremely hinder their application...Lithium-sulfur batteries attract lots of attention due to their high specific capacity,low cost,and environmental friendliness.However,the low sulfur utilization and short cycle life extremely hinder their application.Herein,we design and fabricate a three-dimensional electrode by a simple filtration method to achieve a high-sulfur loading.Biomass porous carbon is employed as a current collector,which not only enhances the electronic transport but also effectively limits the volume expansion of the active material.Meanwhile,an optimized carboxymethyl cellulose binder is chosen.The chemical bonding restricts the shuttle effect,leading to improved electrochemical performance.Under the ultrahigh sulfur load of 28mg/cm2,the high capacity of 18mAh/cm2 is still maintained,and stable cycling performance is obtained.This study demonstrates a viable strategy to develop promising lithium-sulfur batteries with a three-dimensional electrode,which promotes sulfur loading and electrochemical performance.展开更多
Highly active,ultra-long duration and cost-effective catalysts are imminently required for the development of electrolytic appliances for H2 generation.Herein,we propose a novel and facile strategy to fabricate P dope...Highly active,ultra-long duration and cost-effective catalysts are imminently required for the development of electrolytic appliances for H2 generation.Herein,we propose a novel and facile strategy to fabricate P doped CoS2 nanosheet arrays on carbon cloth(Co-S-P/CC)as bifunctional electrocatalysts toward hybrid water electrolysis,in which the tardy anodic oxygen evolution reaction(OER)is substituted by a more favorable kinetic and thermodynamic ethanol oxidation reaction(EOR).展开更多
基金This study was supported by the National Natural Science Foundation of China(51702063 and 51672056)Natural Science Foundation of Heilongjiang(LC2018004)+1 种基金China Postdoctoral Science Foundation(2018M630340,2019T120254)the Fundamental Research Funds for the Central University.
文摘Lithium-sulfur batteries attract lots of attention due to their high specific capacity,low cost,and environmental friendliness.However,the low sulfur utilization and short cycle life extremely hinder their application.Herein,we design and fabricate a three-dimensional electrode by a simple filtration method to achieve a high-sulfur loading.Biomass porous carbon is employed as a current collector,which not only enhances the electronic transport but also effectively limits the volume expansion of the active material.Meanwhile,an optimized carboxymethyl cellulose binder is chosen.The chemical bonding restricts the shuttle effect,leading to improved electrochemical performance.Under the ultrahigh sulfur load of 28mg/cm2,the high capacity of 18mAh/cm2 is still maintained,and stable cycling performance is obtained.This study demonstrates a viable strategy to develop promising lithium-sulfur batteries with a three-dimensional electrode,which promotes sulfur loading and electrochemical performance.
基金supported by the National Natural Science Foundation of China(51672056)the Excellent Youth Project of the Natural Science Foundation of Heilongjiang Province of China(YQ2019B002)the Fundamental Research Funds for the Central Universities(3072020CF1018).
文摘Highly active,ultra-long duration and cost-effective catalysts are imminently required for the development of electrolytic appliances for H2 generation.Herein,we propose a novel and facile strategy to fabricate P doped CoS2 nanosheet arrays on carbon cloth(Co-S-P/CC)as bifunctional electrocatalysts toward hybrid water electrolysis,in which the tardy anodic oxygen evolution reaction(OER)is substituted by a more favorable kinetic and thermodynamic ethanol oxidation reaction(EOR).
