Lithium metal batteries(LMBs)have emerged as pivotal energy storage solutions for electric vehicles and portable electronics.However,their operation under extreme conditions(high-temperature and fast-charging conditio...Lithium metal batteries(LMBs)have emerged as pivotal energy storage solutions for electric vehicles and portable electronics.However,their operation under extreme conditions(high-temperature and fast-charging conditions)faces significant challenges,including accelerated electrolyte decomposition,interfacial instability,and potential thermal runaway risks.To address these challenges,we present a solvation-interphase synergistic regulation strategy using 2-fluorobenzenesulfonamide(2-FBS)as a multifunctional electrolyte additive.The 2-FBS molecule effectively modulates the Li^(+)solvation structure by reducing the coordination of ethylene carbonate(EC)solvent.This transformation suppresses EC-induced parasitic reactions while scavenging superoxide radicals,thereby mitigating gas evolution at electrode interfaces.Upon preferential decomposition,2-FBS further promotes the formation of a robust LiF-Li_(3)N-Li_(2)S-rich interphase with exceptional mechanical strength(Young’s modulus:39.4 GPa).This inorganic-rich hybrid interphase simultaneously enables dendrite-free lithium plating and enhances cathode thermal stability.Consequently,2-FBS-modified electrolyte empowers LiCoO_(2)//Li cells to deliver 82.8%capacity retention after 800 cycles at 55°C and sustain 81.2%capacity retention after 1500 cycles at 4 C.Moreover,practical validation through nail penetration tests confirms the effectiveness of the electrolyte in preventing thermal propagation in fully charged pouch cells.This work establishes a paradigm for enabling reliable battery operation under extreme conditions through synergistic solvation and interphase engineering.展开更多
探讨了东北某输油站场的碳排放核算方法,并结合碳夹点分析法提出了能源结构的调整方案,着重研究了可再生能源对高碳排放能源的替代,从而减少碳排放。碳排放核算结果表明,输油站场温室气体的年排放量约为605705.87 t CO_(2)e,其中电力消...探讨了东北某输油站场的碳排放核算方法,并结合碳夹点分析法提出了能源结构的调整方案,着重研究了可再生能源对高碳排放能源的替代,从而减少碳排放。碳排放核算结果表明,输油站场温室气体的年排放量约为605705.87 t CO_(2)e,其中电力消耗产生的温室气体排放量在高碳排放能源中占比最高,超过94%。碳夹点分析结果表明:在高碳排放能源减排10%的限制下,采用最小可再生能源量方案时,能源结构为电力80.10%、热力4.01%、天然气3.95%、煤2.40%、可再生能源9.54%,可再生能源量为14716.36 tce;采用最大可再生能源量方案时,能源结构为电力85.66%、可再生能源14.35%,可再生能源量为22131.76 tce;在此基础上做进一步分析,可得到各部门的能源分配方案。展开更多
Ball milling is an environmentally friendly technology for the remediation of petroleumcontaminated soil(PCS),but the cleanup of organic pollutants requires a long time,and the post-remediation soil needs an economica...Ball milling is an environmentally friendly technology for the remediation of petroleumcontaminated soil(PCS),but the cleanup of organic pollutants requires a long time,and the post-remediation soil needs an economically viable disposal/reuse strategy due to its vast volume.The present paper develops a ball milling process under oxygen atmosphere to enhance PCS remediation and reuse the obtained carbonized soil(BCS-O)as wastewater treatment materials.The total petroleum hydrocarbon removal rates by ball milling under vacuum,air,and oxygen atmospheres are 39.83%,55.21%,and 93.84%,respectively.The Langmuir and pseudo second-order models satisfactorily describe the adsorption capacity and behavior of BCS-O for transition metals.The Cu^(2+),Ni^(2+),and Mn^(2+)adsorbed onto BCS-O were mainly bound to metal carbonates and metal oxides.Furthermore,BCS-O can effectively activate persulfate(PDS)oxidation to degrade aniline,while BCS-O loaded with transition metal(BCS-O-Me)shows better activation efficiency and reusability.BCS-O and BCS-O-Me activated PDS oxidation systems are dominated by^(1)O_(2)oxidation and electron transfer.The main active sites are oxygen-containing functional groups,vacancy defects,and graphitized carbon.The oxygen-containing functional groups and vacancy defects primarily activate PDS to generate^(1)O_(2)and attack aniline.Graphitized carbon promotes aniline degradation by accelerating electron transfer.The paper develops an innovative strategy to simultaneously realize efficient remediation of PCS and sequential reuse of the postremediation soil.展开更多
基金supported by the Key Laboratory of Sichuan Province for Lithium Resources Comprehensive Utilization and New Lithium Based Materials for Advanced Battery Technology(LRMKF202405)the National Natural Science Foundation of China(52402226)the Sichuan Provincial Natural Science Foundation (2024NSFSC1016)
文摘Lithium metal batteries(LMBs)have emerged as pivotal energy storage solutions for electric vehicles and portable electronics.However,their operation under extreme conditions(high-temperature and fast-charging conditions)faces significant challenges,including accelerated electrolyte decomposition,interfacial instability,and potential thermal runaway risks.To address these challenges,we present a solvation-interphase synergistic regulation strategy using 2-fluorobenzenesulfonamide(2-FBS)as a multifunctional electrolyte additive.The 2-FBS molecule effectively modulates the Li^(+)solvation structure by reducing the coordination of ethylene carbonate(EC)solvent.This transformation suppresses EC-induced parasitic reactions while scavenging superoxide radicals,thereby mitigating gas evolution at electrode interfaces.Upon preferential decomposition,2-FBS further promotes the formation of a robust LiF-Li_(3)N-Li_(2)S-rich interphase with exceptional mechanical strength(Young’s modulus:39.4 GPa).This inorganic-rich hybrid interphase simultaneously enables dendrite-free lithium plating and enhances cathode thermal stability.Consequently,2-FBS-modified electrolyte empowers LiCoO_(2)//Li cells to deliver 82.8%capacity retention after 800 cycles at 55°C and sustain 81.2%capacity retention after 1500 cycles at 4 C.Moreover,practical validation through nail penetration tests confirms the effectiveness of the electrolyte in preventing thermal propagation in fully charged pouch cells.This work establishes a paradigm for enabling reliable battery operation under extreme conditions through synergistic solvation and interphase engineering.
文摘探讨了东北某输油站场的碳排放核算方法,并结合碳夹点分析法提出了能源结构的调整方案,着重研究了可再生能源对高碳排放能源的替代,从而减少碳排放。碳排放核算结果表明,输油站场温室气体的年排放量约为605705.87 t CO_(2)e,其中电力消耗产生的温室气体排放量在高碳排放能源中占比最高,超过94%。碳夹点分析结果表明:在高碳排放能源减排10%的限制下,采用最小可再生能源量方案时,能源结构为电力80.10%、热力4.01%、天然气3.95%、煤2.40%、可再生能源9.54%,可再生能源量为14716.36 tce;采用最大可再生能源量方案时,能源结构为电力85.66%、可再生能源14.35%,可再生能源量为22131.76 tce;在此基础上做进一步分析,可得到各部门的能源分配方案。
基金supported by the National Natural Science Foundation of China(No.41772240)the Key Research and Development program of Jiangsu Province(No.BE2021637).
文摘Ball milling is an environmentally friendly technology for the remediation of petroleumcontaminated soil(PCS),but the cleanup of organic pollutants requires a long time,and the post-remediation soil needs an economically viable disposal/reuse strategy due to its vast volume.The present paper develops a ball milling process under oxygen atmosphere to enhance PCS remediation and reuse the obtained carbonized soil(BCS-O)as wastewater treatment materials.The total petroleum hydrocarbon removal rates by ball milling under vacuum,air,and oxygen atmospheres are 39.83%,55.21%,and 93.84%,respectively.The Langmuir and pseudo second-order models satisfactorily describe the adsorption capacity and behavior of BCS-O for transition metals.The Cu^(2+),Ni^(2+),and Mn^(2+)adsorbed onto BCS-O were mainly bound to metal carbonates and metal oxides.Furthermore,BCS-O can effectively activate persulfate(PDS)oxidation to degrade aniline,while BCS-O loaded with transition metal(BCS-O-Me)shows better activation efficiency and reusability.BCS-O and BCS-O-Me activated PDS oxidation systems are dominated by^(1)O_(2)oxidation and electron transfer.The main active sites are oxygen-containing functional groups,vacancy defects,and graphitized carbon.The oxygen-containing functional groups and vacancy defects primarily activate PDS to generate^(1)O_(2)and attack aniline.Graphitized carbon promotes aniline degradation by accelerating electron transfer.The paper develops an innovative strategy to simultaneously realize efficient remediation of PCS and sequential reuse of the postremediation soil.
