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The Influence of Porous Co/CeO1.88-Nitrogen-Doped Carbon Nanorods on the Specific Capacity of Li-O2Batteries

The Influence of Porous Co/CeO1.88-Nitrogen-Doped Carbon Nanorods on the Specific Capacity of Li-O2Batteries
Hyun, SuyeonKaker, VasuSivanantham, ArumugamHong, JunhyungShanmugam, Sangaraju
Issued Date
ACS Applied Materials & Interfaces, v.13, no.15, pp.17699 - 17706
Author Keywords
cathode structureCo/CeO1.88high specific capacityLi-O2batterynitrogen-doped carbon nanorodoxygen redox reaction
Lithium compoundsNanorodsPhase interfacesSolid electrolytesSolid-State BatteriesBattery performanceCatalyst utilizationDischarge capacitiesElectrochemical stabilitiesGravimetric energy densitiesHigh specific capacitySolid electrolyte interfacesSpecific capacitiesLithium-air batteriesCarbonCatalystsCathodesElectric discharges
Li-O2 batteries are attracting considerable attention as a promising power source for electric vehicles as they have the highest theoretical energy density among reported rechargeable batteries. However, the low energy density and efficiency of Li-O2 batteries still act as limiting factors in real cell implementations. This study proposes the cathode structure engineering strategy by tuning the thickness of a catalyst layer to enhance the Li-O2 battery performance. The construction of the Li-O2 battery with a thinner porous cathode leads less parasitic reactions at the solid electrolyte interface, maximization of the catalyst utilization, and facile transport of oxygen gas into the cathode. A remarkably high specific capacity of 33,009 mAh g-1 and the extended electrochemical stability for 75 cycles at a 1000 mAh g-1 limited capacity and 100 mA g-1 were achieved when using the porous Co/CeO1.88-nitrogen-doped carbon nanorod cathode. Further, a high discharge capacity of 20,279 mAh g-1 was also achieved at a relatively higher current density of 300 mA g-1. This work suggests the ideal cathode structure and the feasibility of the Co/CeO1.88-nitrogen-doped carbon nanorod as the cathode material, which can minimize the areal cathode catalyst loading and maximize the gravimetric energy density. © 2021 American Chemical Society.
American Chemical Society
Related Researcher
  • 상가라쥬샨무감 Shanmugam, Sangaraju 에너지공학과
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
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Department of Energy Science and Engineering Advanced Energy Materials Laboratory 1. Journal Articles


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