Long-term durability of platelet-type carbon nanofibers for OER and ORR in highly alkaline media

Spinel-Type Metal Oxide Nanoparticles Supported on Platelet-Type Carbon Nanofibers as a Bifunctional Catalyst for Oxygen Evolution Reaction and Oxygen Reduction Reaction

“…14 Very recently, we have combined the highly graphitized pCNF with the state-of-the-art highly active Ca 2 FeCoO 5 electrocatalysts by physical mixing, and reported that the electrode exhibited high durability for OER in alkaline electrolyte for 1 month. 9 In this durability test, the pCNF showed extremely slow anodic corrosion under the OER condition, whereas the conventional carbon materials were completely consumed within a few days. 9 Therefore, pCNF with high graphitization degree is very promising as the anti-corrosive carbon material for ZAB.…”

“…9 In this durability test, the pCNF showed extremely slow anodic corrosion under the OER condition, whereas the conventional carbon materials were completely consumed within a few days. 9 Therefore, pCNF with high graphitization degree is very promising as the anti-corrosive carbon material for ZAB.…”

“…Carbon materials are one of the key components in the air electrode and used as promising conductive supports of catalyst materials due to good electrochemical characteristics, lightweight, earth-abundant characteristics and a role as a cocatalyst for ORR. [1][2][3][4][5][6][7][8][9] Many types of carbon materials, such as carbon nanotubes, 2,3 graphene, 4,5 carbon blacks, 1,6,7 and carbon nanofibers, 8,9 have been applied as electrode materials by loading electrocatalysts including metal and metal oxide nanoparticles. The carbon-containing hybrid materials have shown high activities for OER and ORR, but carbon materials are easily oxidized under OER conditions, [7][8][9] leading to the degradation of battery performance.…”

“…Recently, platelet-type carbon nanofibers (pCNF) have an attracted increased attention as novel carbon materials for electrocatalysts and their supports. [9][10][11][12] The pCNF with a high graphitization degree was formed by heat treatment at high temperatures >2000°C. 9,13,14 The high-temperature-treated pCNF has a unique structure with graphene layers stacked to the fiber axis without exposure of carbon edges by means of loop formation.…”

“…[9][10][11][12] The pCNF with a high graphitization degree was formed by heat treatment at high temperatures >2000°C. 9,13,14 The high-temperature-treated pCNF has a unique structure with graphene layers stacked to the fiber axis without exposure of carbon edges by means of loop formation. 14 Very recently, we have combined the highly graphitized pCNF with the state-of-the-art highly active Ca 2 FeCoO 5 electrocatalysts by physical mixing, and reported that the electrode exhibited high durability for OER in alkaline electrolyte for 1 month.…”