Laser-driven coating of vertically aligned carbon nanotubes with manganese oxide from metal organic precursors for energy storage
Source abstract
Abstract
Abstract Carbon nanotubes-transition metal oxide systems are intensively studied due to their excellent properties for electrochemical applications. In this work, an innovative procedure is developed for the synthesis of vertically aligned multi-walled carbon nanotubes (VACNTs) coated with transition metal oxide nanostructures. VACNTs are grown by plasma enhanced chemical vapor deposition and coated with a manganese-based metal organic precursor (MOP) film based on manganese acetate solution. Subsequent UV pulsed laser irradiation induces the effective heating-decomposition of the MOP leading to the crystallization of manganese oxide nanostructures on the VACNT surface. The study of the morphology, structure and composition of the synthesized materials shows the formation of randomly oriented MnO 2 crystals, with few nanometers in size, and to their alignment in hundreds of nm long filament-like structures, parallel to the CNT’s long axis. Electrochemical measurements reveal a significant increase of the specific capacitance of the MnO 2 -VACNT system (100 F g −1 ) as compared to the initial VACNT one (21 F g −1 ).
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Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Diamond and Carbon-based Materials Research · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Instituto de Ciencia de Materiales de Barcelona
National Institute for Lasers
Universitat de Barcelona
Departamento de Materiales, Facultad de Ingeniería Mecánica, Escuela Politécnica Nacional, Ladrón de Guevara, E11-253, Quito,
Funding
Secretaría de Estado de Investigación, Desarrollo e Innovación · Agència de Gestió d’Ajuts Universitaris i de Recerca
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