Ruthenium oxide modified hierarchically porous boron-doped graphene aerogels as oxygen electrodes for lithium–oxygen batteries

Abstract

Hierarchically porous RuO2-B-HRG is a great bifunctional catalyst and effectively improve the performance of non-aqueous Li–O2 batteries.

Well-dispersed Pt/RuO2-decorated mesoporous N-doped carbon as a hybrid electrocatalyst for Li–O2 batteries

“…33 The lower peaks between 70 and 90 ppm were attributed to sp 3 carbon bonded to heteroatoms. 34 Therefore, the 13 C solid-state MAS NMR results showed that the decomposition of amino acid and alkyl chain results in the formation of N-doped carbon along with an aromatic system. 35,36 Thus, we conrmed the characterization of N-doped carbon derived from proteinbased tofu.…”

“…11 In recent studies, various carbonaceous materials, such as graphene, reduced graphene oxide (rGO), carbon nanotubes (CNTs), and carbon cloth (CT), have been used as catalyst supports to improve the charge transport and reaction product accommodation of O 2 -electrode in Li-O 2 batteries. [12][13][14][15][16] However, these carbon materials require complex syntheses, and therefore, they are expensive. Biomass-based carbon materials are promising alternatives for applications in battery catalyst supports owing to their easy availability and low cost.…”

Flexible Three-Dimensional Hierarchical Porous Multifunctional Electrodes for Enhanced Performance by Electrodepositing Perovskite CeFeO3 on Carbon Foam

“…Carbon-based materials, including carbon nanofibers, , nanotubes, , graphene sheets, and graphene aerogels, , have been adopted widely as a porous framework for the oxygen cathodes of Li-O 2 cells. Compared with conventional low-dimensional materials, 3D porous carbon is prone to balance abundant electrochemically active sites and large pore volumes for the accommodation of insoluble products. ,, Graphene aerogels have been constructed as the host material for bifunctional catalysts. , RuO 2 -modified B-doped graphene aerogel cathodes could deliver an initial discharge capacity of 4300 mAh·g –1 at a current density of 0.1 mA·cm –2 . The extension of discharge time is partly attributed to a low electrical resistance and interpenetrating charge diffusion pathways of 3D scaffolds from a microscopic view.…”

Wrinkled Perovskite La0.9Mn0.6Ni0.4O3−δ Nanofibers as Highly Efficient Electrocatalyst for Rechargeable Li−O2 Batteries

“…The reversible formation and decomposition of Li 2 O 2 on the cathode is considered as the most primary factor to affect most of the aforementioned problems, deteriorating the performance of Li−O 2 battery. Aiming at the key factors, extensive researches have been devoted to developing various active catalysts, including carbon materials, precious metals or alloys, transition metal nitrides and oxides …”

“…The reversible formation and decomposition of Li 2 O 2 on the cathode is considered as the most primary factor to affect most of the aforementioned problems, deteriorating the performance of LiÀ O 2 battery. Aiming at the key factors, extensive researches have been devoted to developing various active catalysts, including carbon materials, [1][2][3] precious metals or alloys, [4][5][6] transition metal nitrides [7][8][9] and oxides. [10][11][12] As recently reported in the literatures, [13][14][15][16][17] perovskite oxides (ABO 3 ) have become attractive catalysts with prominent advantages of good ORR/OER activity, low cost, high electrochemical stability and relatively high ionic/electronic conductivity, which previously were widely applied in fuel cells.…”