MnO₂/carbon nanowall electrode for future energy storage application: effect of carbon nanowall growth period and MnO₂mass loading

Abstract

MnO2/carbon nanowalls electrode with a specific capacitance of 1170 F g−1, energy density of 162.5 W h kg−1 and power density of 915.7 W kg−1.

Aging phenomena and wettability control of plasma deposited carbon nanowall layers

“…CNW, also known as vertically oriented/aligned graphene sheets, are on long‐term stable, as far as structure and morphology are concerned, even when used in working devices. This nanomaterial has good durability over long‐time testing in acid solution, and functional stability when used in field emitters, electrodes for biosensors, and gas sensors, or as nanostructured electrodes in batteries, and supercapacitors …”

Vertically Aligned Graphene Nanosheet Arrays: Synthesis, Properties and Applications in Electrochemical Energy Conversion and Storage

“…MnO 2 NPs were anchored on VAGNAs (synthesized on Ni foams) via electrodeposition, and the hybrid pseudocapacitor electrodes delivered much improved capacitance as compared with both pure MnO 2 and VAGNA electrodes. [95,96] The density functional theory calculations indicated that the morphology of VAGNAs and the covalent bonding between MnO 2 and graphene contributed to effective charge transfer during the electrochemical processes. [94] As a representative pseudocapacitive material, porous RuO 2 NPs were also decorated on VAGNAs/ Si through electrodeposition, and the electrodes were used for fabricating all-solid-state micro-supercapacitors (as shown in the SEM image in Figure 7a).…”

Graphene/MnO 2 hybrid film with high capacitive performance

“…Porous carbon materials, transition metal oxides, and conducting polymers are currently the promising candidates for supercapacitor electrode materials [5]. Among various metal oxides, manganese oxides are one of the most promising pseudocapacitive materials due to their high specific capacitance, environmental compatibility and cost effectiveness [6,7]. In particular, -type manganese oxide has gained much attention as a potential electrode material for supercapacitors due to its layered structure and unique properties [8,9].…”