Ti-rich TiO2 Tubular Nanolettuces by Electrochemical Anodization for All-Solid-State High-Rate Supercapacitor Devices.
ChemSusChem
; 12(17): 4064-4073, 2019 Sep 06.
Article
em En
| MEDLINE
| ID: mdl-31267672
ABSTRACT
Supercapacitors store charge by ion adsorption or fast redox reactions on the surface of porous materials. One of the bottlenecks in this field is the development of biocompatible and high-rate supercapacitor devices by scalable fabrication processes. Herein, a Ti-rich anatase TiO2 material that addresses the above-mentioned challenges is reported. Tubular nanolettuces were fabricated by a cost-effective and fast anodization process of Ti foil. They attained a large potential window of 2.5â
V in a neutral electrolyte owing to the high activation energy for water splitting of the (1 0 1) facet. Aqueous and all-solid-state devices showed diffusion time constants of 46 and 1700â
ms, as well as high maximum energy (power) densities of 0.844 (0.858) and 0.338â
µWh cm-2 (0.925â
mW cm-2 ), respectively. The all-solid-state device showed ultrahigh stability of 96 % in capacitance retention after 20 000 galvanostatic charge/discharge cycles. These results open an avenue to fabricate biochemically inert supercapacitor devices.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Revista:
ChemSusChem
Assunto da revista:
QUIMICA
/
TOXICOLOGIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Irã