Cobaltite oxide nanosheets anchored graphene nanocomposite as an efficient oxygen reduction reaction (ORR) catalyst for the application of lithium-air batteries

VN Quantum Dots Anchored Uniformly onto Nitrogen-Doped Graphene as Efficient Electrocatalysts for Oxygen Reduction Reaction

“…Very recently, some transition metal compounds such as transition metal oxides (FeO x ; [15][16][17] XCo 2 O 4 , 18,19 Co 3 O 4 [20][21][22][23] ), sul¯des (CoS x ; 24 MoS 2 , 25,26 ), CuSe 27 and nitrides (W x N, 28,29 MoN, 30,31 NG 32 ) have been proposed as ORR electrocatalysts owing to their abundance in nature, chemical stability and intrinsic electrocatalytic activities for hydrogen and oxygen. In particular, transition metal nitrides possess a greater density of states around Fermi level in comparison with corresponding transition metal, which renders them to have attractive electrocatalytic activities for ORR, analogous to those of Pt-based catalysts.…”

Cobalt oxide nanosheets anchored onto nitrogen-doped carbon nanotubes as dual purpose electrodes for lithium-ion batteries and oxygen evolution reaction

“…The excellent cycling stability and high capacity of the Ni foam‐supported N‐CNT@Co 3 O 4 nanosheets could be ascribed to the good conductivity of the entangled N‐CNTs, the denser coverage of the crosslinked Co 3 O 4 nanosheets over the N‐CNTs, and the synergetic effects between the N‐CNTs and the Co 3 O 4 nanosheets. The synergetic effects have been reported in many two components systems and could be explained as follows: the interwoven N‐CNTs can provide strong skeleton to enhance the electron conductivity and buffer volume expansion of the Co 3 O 4 nanosheets during the Li + insertion/extraction, and the porous and crosslinked Co 3 O 4 nanosheets can guarantee more accessible pathways to the electrolyte and thus reduce the interface resistance. These are further evidenced by the EIS results ().…”

Rational design of Au dotted Co3O4nanosheets as an efficient bifunctional catalyst for Li–oxygen batteries

“…It is necessary to limit the capacity during cycling because Li 2 O 2 is accumulated on the surface of the electrodes along with capacity enhancement, thus deactivating the catalytic sites and depressing the electron conductivity of the oxygen electrode. 8,22,36 The tetraethylene glycol dimethyl ether (TEGDME) was used as the electrolyte solvent due to its higher stability toward O 2 À than carbonate-based electrolytes. 37 As shown in Fig.…”