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Towards full demonstration of high areal loading sulfur cathode in lithium–sulfur batteries

Journal of Energy Chemistry 2019年第12期28卷 17-22页

作者： Long Kong Qi Jin Xi-Tian Zhang Bo-Quan Li Jin-Xiu Chen Wan-Cheng Zhu Jia-Qi Huang Qiang Zhang Beijing Key Laboratory o f Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025HeilongjiangChina Department of Chemical Engineering Qufu Normal UniversityQufu 273165ShandongChina Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

Lithium–sulfur(Li–S)batteries have been recognized as promising substitutes for current energy-storage technologies owing to their exceptional advantages in very high-energy density and excellent material *** cathode with high sulfur areal loading is vital for the practical applications of Li–S batteries with very high energy ***,the high sulfur loading in an electrode results in poor rate and cycling performances of batteries in most ***,we used diameters of 5.0(D5)and 13.0(D13)mm to probe the effect of electrodes with different sizes on the rate and cycling performances under a high sulfur loading(4.5 mg cm^-2).The cell with D5 sulfur cathode exhibits better rate and cycling performances comparing with a large(D13)*** the high concentration of lithium polysulfides and corrosion of lithium metal anode impede rapid kinetics of sulfur redox reactions,which results in inferior battery performance of the Li–S cell with large diameter *** work highlights the importance of rational matching of the large sulfur cathode with a high areal sulfur loading,carbon modified separators,organic electrolyte,and Li metal anode in a pouch cell,wherein the sulfur redox kinetics and lithium metal protection should be carefully considered under the flooded lithium polysulfide conditions in a working Li–S battery.

关键词： Lithium sulfur batteries High areal sulfur loading Lithium anode protection Sulfur redox reactions polysulfide interm ediates

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