Electrochemical performance comparison of MWCNTs Ni (OH)2 composite materials by two preparation routes

Carbon materials are used to improve the nickel hydroxide electrode capacity in rechargeable alkaline batteries. Herein, we present the preparation of multiwall carbon nanotubes/nickel hydroxide composites (MWCNTs/Ni (OH)2) by two different routes. The first method consists of the direct incorporati...

Descripción completa

Detalles Bibliográficos
Autores: Ortiz, Mariela, Castro, Élida Beatriz, Real, Silvia
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:Argentina
Institución:Universidad Tecnológica Nacional
Repositorio:Repositorio Institucional Abierto (UTN)
Idioma:inglés
OAI Identifier:oai:ria.utn.edu.ar:20.500.12272/2922
Acceso en línea:http://hdl.handle.net/20.500.12272/2922
Access Level:acceso abierto
Palabra clave:Nickel hydroxide, Carbon nanotubes, Positive electrode, Ni-MH batteries
Descripción
Sumario:Carbon materials are used to improve the nickel hydroxide electrode capacity in rechargeable alkaline batteries. Herein, we present the preparation of multiwall carbon nanotubes/nickel hydroxide composites (MWCNTs/Ni (OH)2) by two different routes. The first method consists of the direct incorporation of MWCNTs in the active material, and the second is based on the hydrothermal synthesis of β-nickel hydroxide, where MWCNTs are added to the precursor solutions. The electrochemical properties of the prepared positive electrodes containing MWCNTs/Ni (OH)2 composites are studied. Electrochemical results indicate that the active material with MWCNTs incorporated before the hydrothermal synthesis is capable of delivering a higher discharge capacity and exhibits a better reversibility than those composites prepared with MWCNTs after the hydrothermal route.

Similares en LA Referencia