Fabrication of CNT-N@Manganese Oxide Hybrid Nanomaterials through a Versatile One-Pot Eco-Friendly Route toward Engineered Textile Supercapacitors

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Teixeira, JS (Autor) Outra; Costa, RS (Autor) Outra; Guedes, A (Autor) FCUP; pereira, a. m. (Autor) FCUP; Clara Pereira (Autor) FCUP

Revista

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Título: ACS APPLIED ENGINEERING MATERIALS

Vol. 2

Páginas: 1170-1189

ISSN: 2771-9545

Indexação

ISI Web of Knowledge - 1 Citação

Outras Informações

ID Authenticus: P-011-49P

DOI: 10.1021/acsaenm.4c00164

Abstract (EN): The expansion of the Internet of Things market and the proliferation of wearable technologies have generated a significant demand for textile-based energy storage systems. This work reports the engineered design of hybrid electrode nanomaterials of N-doped carbon nanotubes (CNT-N) functionalized with two types of manganese oxides (MOs)& horbar;birnessite (MnO2) and hausmannite (Mn3O4)& horbar;and their application in solid-state textile-based hybrid supercapacitors (SCs). A versatile citric acid-mediated eco-friendly one-pot aqueous precipitation process is proposed for the fabrication of the hybrids. Remarkably, different types of MOs were obtained by simply changing the reaction temperature from room temperature to 100 degrees C, without any post-thermal treatment. Asymmetric textile SCs were developed using cotton fabrics coated with CNT-N and the hybrids as textile electrodes, and poly(vinyl) alcohol/orthophosphoric acid as the solid-gel electrolyte. The asymmetric devices presented enhanced energy storage performance relative to the symmetric device based on CNT-N and excellent cycling stability (>96%) after 8000 charge/discharge cycles owing to synergistic effects between CNT-N and the MOs, which endowed nonfaradaic and pseudocapacitive features to the SCs. The asymmetric SC based on CNT-N@MnO2 featured 47% higher energy density and comparable power density to the symmetric CNT-N-based device (8.70 W h cm(-2) at 309.01 mu W cm(-2) vs. 5.93 W h cm(-2) at 346.58 mu W cm(-2)). The engineered hybrid CNT-N@MO nanomaterials and the eco-friendly citric acid-assisted one-pot precipitation route open promising prospects not only for energy storage, but also for (photo)(electro)catalysis, wastewater treatment, and (bio)sensing.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 20