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Increasing sulfur utilization in lithium-sulfur batteries by a Co-MOF-74@MWCNT interlayer

Journal of Energy Chemistry 2021年第9期30卷 186-193页

作者： SiHyeon Sung Byung Hyuk Kim SeungTaek Lee Sanghyeon Choi Woo Young Yoon Department of Materials Science and Engineering Korea University15GaAnam-dongSungbuk-GuSeoul 136-701Republic of Korea

To improve lithium-sulfur battery performance,Co-MOF-74 has been applied for the first time as an interlayer with multiwalled carbon nanotubes(MWCNTs).Co-MOF-74@MWCNT was synthesized using a solvothermal *** fabrication of Co-MOF-74@MWCNT was confirmed by scanning electron microscopy,X-ray diffraction,thermogravimetric analysis,and Brunauer-Emmett-Teller *** interlayer was fabricated using a filtration *** batteries were prepared using a CoMOF-74@MWCNT interlayer and an MWCNT interlayer and subsequently investigated via cyclic voltammetry ***-MOF-74 promotes a redox reaction and shows a small peak at 1.85 V.A symmetric and full cell test revealed that the Co-MOF-74@MWCNT cell enables a faster redox reaction and higher capacity than that of the MWCNT *** 15 cycles,the Co-MOF-74@MWCNT cell achieved a value of 1112 mAh g^(-1),which is 26% greater than that of the MWCNT cell(880 mAh g^(-1)) at 0.2 *** profile testing showed that the reason for the higher capacity of the Co-MOF-74@MWCNT cell is that it promotes the conversion of Li_(2)S_(2) to Li_(2)*** electrochemical analyses confirmed that the Co-MOF-74@MWCNT interlayer acts not only as a physical and chemical barrier but also promotes the transformation of Li_(2)S_(2) to Li_(2)S.

关键词： Li-S battery Shuttling effect Interlayer sulfur utilization Co-MOF-74

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Differential utilization and speciation transformation of orthorhombic α-S_8 and amorphous μ-S by substrate-acclimated mesophilic Acidithiobacillus ferrooxidans

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Transactions of Nonferrous Metals Society of China 2015年第9期25卷 3096-3102页

作者：刘红昌夏金兰聂珍媛郑雷马陈燕赵屹东中南大学资源加工与生物工程学院长沙410083 中南大学生物冶金教育部重点实验室长沙410083 中国科学院高能物理研究所北京同步辐射装置北京100049

The utilization and speciation transformation of α-S8 and μ-S by the typical mesophilic acidophilic strain Acidithiobacillus ferrooxidans ATCC 23270 were *** cells first acclimated to the energy source α-S8 or μ-S,*** results of cell growth and sulfur oxidation behavior showed that the strain grown on α-S8 entered slowly（about 1 d later） into the exponential phase,while grew faster in the exponential phase and attained higher maximal cell density and lower p H value than that on μ-*** bio-corrosion,both of the two sulfur samples were evidently eroded and modified by *** *** growth of ***,the surface composition of amorphous μ-S became 63.1% μ-S and 36.9% α-S8,and that of orthorhombic α-S8 became 68.3% α-S8 and 31.7% μ-S,while the surface compositions of α-S8 and μ-S in sterile experiment were not changed,indicating that these two elemental sulfur species can be interconverted by ***.

关键词： sulfur utilization sulfur speciation transformation α-S8 μ-S Acidithiobacillus ferrooxidans

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Alternative and Potential Uses for the sulfur Byproducts Produced from Oil and Gas Fields

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International Journal of Organic Chemistry 2021年第1期11卷 14-23页

作者： Saba Hanif Khan Sara Amani Mahmood Amani Texas A & M University at Qatar Doha Qatar

Along with oil and gas operations, huge amounts of sulfur byproducts are produced. For example, in the State of Qatar which has the third largest proven reserves of natural gas, an incredible amount of sulfur is produced as byproduct from its natural gas processing facilities. The amount of produced sulfur surpasses by far the amount that can be utilized currently in the country. Hydrogen sulfide (H2S) existing in natural gas extracted from Qatar’s North Field is converted to elemental sulfur using the conventional Claus process. Managing byproduct sulfur from natural gas processing is a key aspect of economic development and environmental protection in many countries with oil and gas facilities. Therefore, new markets must be found to utilize sulfur to avoid disposal crises. sulfur byproduct from natural gas can be utilized for various applications. This paper discusses alternative potential uses for sulfur in addition to the current practices of sulfur utilization. Some of these alternative applications of sulfur byproducts include the potential usage for medicinal uses, road construction, batteries, hydrogen production, structural additives, solar energy, waste treatment, arsenite removal, and production of maize.

关键词： sulfur sulfur utilization Oil and Gas Operations Petroleum Natural Gas

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Synergistic Effect of High Donor Electrolyte and Catalytic Separator for Practical Lithium–sulfur Batteries

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Renewables 2024年第5期2卷 364-374页

作者： Yongxin Xiao Qianhui He Lin Peng Jingwen Liu Xiaoxian Guan Luyi Chen Yue-Peng Cai Qifeng Zheng School of Chemistry Guangzhou Key Laboratory of Materials for Energy Conversion and StorageSouth China Normal UniversityGuangzhou510006 Guangdong

The commercialization of lithium-sulfur(Li-S)batteries has been hampered by the low utilization of S,resulting in low practical energy density and the severe shuttle effect of lithium polysulfides(LiPSs)that leads to poor cycle ***,a combined strategy of electrolyte engineering and separator functionalization was proposed to solve the conflict between high S utilization and cycling *** have demonstrated that the high donor electrolyte regulates the solvation of LiPSs with the formation of S_(3)^(·-)to induce radical-assisted efficient conversion pathway and threedimensional(3D)Li2S deposition,which greatly enhanced the S utilization while exacerbating the shuttling of ***,the carbon nanosheet-based modified separator with abundant Zn-Co diatomic metal sites efficiently inhibited the shuttling of LiPSs by catalyzing the conversion reaction of ***,the resulting Li-S battery delivered a remarkably high capacity of 1300 mAh g^(-1) with a high average coulombic efficiency of 99.4% during *** at a high S mass loading(9.3 mg cm^(-2))and lean electrolyte condition(E/S=3μL mg^(-1)),the Li-S battery still delivered a high capacity of 1088 mAh g^(-1),representing a significant advancement in designing practically high energy Li-S batteries with long cycle life.

关键词： Li-S battery high donor electrolyte catalytic separator sulfur utilization synergistic effect

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