[논문]Fishing-net-shaped cobalt oxide microspheres for effective polysulfide reservoirs of rechargeable Li–S battery cathodes

Kim, Jin Kyu; Park, Hyemin; Lee, Sun Sook; Son, Seung Uk; Kang, Yongku; Im, Won Bin; Choi, Sungho

doi:10.1016/j.matchemphys.2019.122567

[해외논문] Fishing-net-shaped cobalt oxide microspheres for effective polysulfide reservoirs of rechargeable Li–S battery cathodes

Materials chemistry and physics, v.243, 2020년, pp.122567 -

Kim, Jin Kyu (Advanced Automotive Battery Division) , Park, Hyemin (Advanced Materials Division, Korea Research Institute of Chemical Technology) , Lee, Sun Sook (Advanced Materials Division, Korea Research Institute of Chemical Technology) , Son, Seung Uk (Department of Chemistry, Sungkyunkwan University) , Kang, Yongku (Advanced Materials Division, Korea Research Institute of Chemical Technology) , Im, Won Bin (Division of Materials Science and Engineering, Hanyang University) , Choi, Sungho (Advanced Materials Division, Korea Research Institute of Chemical Technology)

Abstract ▼ AI-Helper

Abstract Hole-embedded one-directional two-dimensional sheet-assembly cobalt oxide microspheres are synthesized and assessed as effective encapsulation media for polysulfides in cathodes of lithium–sulfur batteries. The cathode of fishing-net-shaped cobalt oxide compounds incorporated with sulfur provides exceptional electrochemical properties such as a high Coulombic efficiency (99%), stable capacity fading, and a reversible capacity of 925 mA h g−1 at 1 C, which is 22% higher than that of the conventional nanoparticulate cobalt oxide/sulfur electrode. The enhanced electrochemical behavior is attributed to the effective polysulfide adsorbent and hierarchically designed porous cobalt oxide with a coaggregated framework. The controlled pore-embedded particle size is an essential parameter determining the capture of the mobile polysulfides, rather than the use of numerous mere highly porous encapsulants, such as nanoparticulate cobalt oxides. Highlights Optimum pore and morphology controlled spherical Co3O4for polysulfide reservoir. Stable capacity retention for the given Co3O4microsphere incorporated S cathode. Propose conceptual design of cobaltoxide compounds for the novel electrode material Graphical abstract [DISPLAY OMISSION]

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[해외논문] Fishing-net-shaped cobalt oxide microspheres for effective polysulfide reservoirs of rechargeable Li–S battery cathodes

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[해외논문] Fishing-net-shaped cobalt oxide microspheres for effective polysulfide reservoirs of rechargeable Li–S battery cathodes

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