Jump to main content
Jump to site search


Electric field effect in a Co3O4/TiO2 p–n junction for superior lithium-ion storage

Author affiliations

Abstract

Constructing heterojunctions holds huge potential for tuning material properties owing to the built-in charge transfer driving force, which is beneficial for the migration behavior of Li-ions. While both the electrochemistry and heterojunctions of alloying-type anodes have been studied, the role of heterojunctions in improving the Li-ion storage performance of conversion-type anodes is unclear. In this work, porous Co3O4/TiO2 nanosheets (P-Co3O4/TiO2 NSs) were fabricated to successfully construct a p–n junction by coating n-type TiO2 on p-type Co3O4 NSs. The formation of the built-in electric field in the p–n junction significantly facilitates the charge transfer kinetics and the amorphous TiO2 layer accommodates the volume change of the Co3O4 NSs, manifesting the superiority of applying the p–n junction in a conversion-type anode for the first time. When evaluated as lithium-ion battery (LIB) anodes, the P-Co3O4/TiO2 NSs deliver high specific capacity, long-term cycling stability and remarkable rate capability (801 mA h g−1 after 1600 cycles at a current density of 2 A g−1).

Graphical abstract: Electric field effect in a Co3O4/TiO2 p–n junction for superior lithium-ion storage

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Jan 2019, accepted on 18 Mar 2019 and first published on 27 Mar 2019


Article type: Research Article
DOI: 10.1039/C9QM00007K
Citation: Mater. Chem. Front., 2019, Advance Article

  •   Request permissions

    Electric field effect in a Co3O4/TiO2 p–n junction for superior lithium-ion storage

    H. Kong, C. Yan, C. Lv, J. Pei and G. Chen, Mater. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QM00007K

Search articles by author

Spotlight

Advertisements