Robust, freestanding, and bendable multi-walled carbon nanotube buckypapers as electrode materials for quasi-solid-state potassium-ion supercapacitors

Autor(es)

Amaral, Murilo M. ^{[1, 2]} ; Pinzon, Manuel J. C. ^{[1, 2]} ; Peterlevitz, Alfredo C. ^{[1, 2]} ; Rufino Junior, Carlos A. ^{[1, 2]} ; Da Silva, Leonardo M. ^[3] ; Zanin, Hudson ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Ctr Innovat New Energies, Adv Energy Storage Div, Carbon Sci Tech Labs, Av Albert Einstein 400, BR-13083852 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Ctr Innovat New Energies, Adv Energy Storage Div, Mfg Grp, Av Albert Einstein 400, BR-13083852 Campinas, SP - Brazil

^[3] Fed Univ Jequitinhonha & Mucuris Valley, Lab Fundamental & Appl Electrochem, Dept Chem, Rodovia MGT 367, Km 583, 5000, BR-39100000 Diamantina, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: DIAMOND AND RELATED MATERIALS; v. 115, MAY 2021.
• Citações Web of Science: 0

Resumo

We report here on the performance of quasi-solid-state potassium ion electrolyte filling electrochemical supercapacitors. The electrolyte is composed of aqueous-based polyvinyl alcohol with potassium and sulfate ions. This electrolyte is first investigated filling the coin cells with two identical multi-walled carbon nanotube buckypapers as the electrode materials, and later, it was analyzed in a pouch cell. Our electrochemical results, obtained from different techniques, show that the cell's working voltage window is as wide as 1.6 V, yielding a volumetric capacitance of 18 F cm-3, and equivalent series resistance smaller than 2.5 omega. We prepare a pouch cell with our best coin cell findings to investigate the cell's mechanical behavior. Our findings showed that quasi-solid-state potassium ion-based supercapacitors are highly flexible and robust, thus encouraging further investigation on the development of flexible supercapacitors to be applied on various wearable and bendable devices. (AU)

• Processo FAPESP: 17/11958-1 - CINE - Divisão para Armazenamento de Energia Avançado
• Beneficiário: Rubens Maciel Filho
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 14/02163-7 - Desenvolvimento de dispositivos supercapacitores a partir de grafenos, nanotubos de carbono e diamantes
• Beneficiário: Hudson Giovani Zanin
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores