Fast synthesis of δ-MnO2 for a high-performance supercapacitor electrode
Tipo
Artigo
Data de publicação
2020
Periódico
SN Applied Sciences
Citações (Scopus)
31
Autores
Cremonezzi J.M.O.
Tiba D.Y.
Domingues S.H.
Tiba D.Y.
Domingues S.H.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
© 2020, Springer Nature Switzerland AG.We report a very simple and fast route for a high capacitive birnessite type manganese dioxide (δ-MnO2) synthesis, fully suitable to be applied as electrode in redox-based electrochemical supercapacitors. The material was obtained from a very efficient chemical reduction of potassium permanganate by nascent hydrogen in low temperature acid media. δ-MnO2 was extensively characterized by several techniques confirming the obtainment through the proposed route. The supercapacitive properties of the novel structure were evaluated showing a specific capacitance of 190 F g−1 at 0.25 A.g−1. In addition, to the best of our knowledge, this is the first report regarding the chemical synthesis of δ-MnO2 with no dependence of hazardous reducing agent, high temperature or high pressure commonly used to metal oxides production.
Descrição
Palavras-chave
Assuntos Scopus
Chemical reduction , Electrochemical supercapacitor , High temperature , Manganese dioxide , Nascent hydrogens , Potassium permanganate , Specific capacitance , Supercapacitor electrodes