info:eu-repo/semantics/article
Electrochemical performance comparison of MWCNTs/Ni (OH)2 composite materials by two preparation routes
Fecha
2017-08Registro en:
Ortiz, Mariela Gisela; Castro, Elida Beatriz; Real, Silvia Graciela; Electrochemical performance comparison of MWCNTs/Ni (OH)2 composite materials by two preparation routes; Springer; Journal of Solid State Electrochemistry (print); 21; 8; 8-2017; 2339-2347
1432-8488
CONICET Digital
CONICET
Autor
Ortiz, Mariela Gisela
Castro, Elida Beatriz
Real, Silvia Graciela
Resumen
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.