Electrode-Less MnO2 -Metal Batteries with Deposition and Stripping Chemistry.
Small
; 17(44): e2103921, 2021 Nov.
Article
em En
| MEDLINE
| ID: mdl-34585847
ABSTRACT
Electrode materials are key components in typical batteries, where the electrodes are generally fabricated onto current collectors in solid forms and are isolated by a separator. However, the preparation of the electrodes increases the fabrication complexity, which speeds down their large-scale production. Here, series of static electrode-less MnO2 -metal batteries are presented that are facilely fabricated by using carbon current collectors and electrolytes. The MnO2 -metal batteries are operated in dual-deposition/stripping chemistries of Mn2+ /MnO2 on the cathode and M/Mx+ on the anode. The MnO2 -Cd/Zn/Cu batteries exhibit remarkable rates up to 200 C, excellent reversibility of 15 000 cycles, and realistic gravimetric and volumetric energy densities of 93.7 Wh kg-1 and 134 Wh L-1 , respectively. Impressively, the MnO2 -Cd battery can achieve over 160 000 cycles in the high current pulse test, showing promises in the applications of electrical vehicle's start-stop and large-scale energy storage.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Revista:
Small
Assunto da revista:
ENGENHARIA BIOMEDICA
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China