Entity: Universitat Rovira i Virgili (URV)
Confidenciality: No
Education area(s): Nanociència, Materials i Processos - Tecnologia Química de Frontera
Title in different languages: Carbon nano-onion-modified Ni-cathode materials for Ni-based batteries and a sustainable future
Abstract: Ni-based batteries like Ni-Fe, Ni-Zn and Ni-MH were extendedly used in the previous century since their invention due to their great efficiency, high output power and eco-friendly and safe character. Nonetheless, their relatively low cycle life and material instabilities set them aside from the future large-scale production and commercialisation in favour of other systems such as the Li-ion and Pb-acid batteries. In order to overcome these limitations, in the current work we analyse the improvement in performance derived from the use of carbon nano-onions (CNOs) compared to other carbon materials, e.g. graphite powder, in the design and fabrication of cathode materials. In these terms, we fabricated CNOs/Ni(OH)2 composites-modified glassy carbon electrodes (GCEs) that enhanced the electrochemical signal by a maximum factor of 10 in cyclic voltammetry studies, and the specific capacity of the electrodes from 20.4 to 72.3 mAh=g, with a capacity retention of 62.6% at a rate of 10 C after 5 cycles. Moreover, we further analyse and compare the distinct role of several syntheses of and nickel hydroxides in the electrochemical performance and behaviour as the cathode active materials for the mentioned Ni-based batteries.
Subject: Enginyeria química
Academic year: 2019-2020
Language: Anglès
Work's public defense date: 2020-09-09
Subject areas: Chemical engineering
Student: Andreo Acosta, Andrés Alberto
Department: Enginyeria Química
Creation date in repository: 2020-12-02
TFM credits: 24
Keywords: Ni-based batteries, cathode materials, carbon nano-onions
Title in original language: Carbon nano-onion-modified Ni-cathode materials for Ni-based batteries and a sustainable future
Project director: Fragoso Sierra, Alex
Repositori URV