Details

Autor(en) / Beteiligte

• Hyun, Suyeon
• Kaker, Vasu
• Sivanantham, Arumugam
• Hong, Junhyung
• Shanmugam, Sangaraju

Titel

The Influence of Porous Co/CeO 1.88 -Nitrogen-Doped Carbon Nanorods on the Specific Capacity of Li-O 2 Batteries

Ist Teil von

• ACS applied materials & interfaces, 2021-04, Vol.13 (15), p.17699-17706

Ort / Verlag

United States

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Li-O 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-O 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-O battery performance. The construction of the Li-O 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 and the extended electrochemical stability for 75 cycles at a 1000 mAh g limited capacity and 100 mA g were achieved when using the porous Co/CeO -nitrogen-doped carbon nanorod cathode. Further, a high discharge capacity of 20,279 mAh g was also achieved at a relatively higher current density of 300 mA g . This work suggests the ideal cathode structure and the feasibility of the Co/CeO -nitrogen-doped carbon nanorod as the cathode material, which can minimize the areal cathode catalyst loading and maximize the gravimetric energy density.