Abstract
The structure and electrochemical properties of epitaxial thin film LiNi0.5Mn1.5O4 electrodes are investigated for lithium ion secondary batteries applications. The orientation and thickness of the LiNi0.5Mn1.5O4 films are controlled by changing the substrate orientation and the pulse laser deposition time, respectively. The lattice parameters of the films increase with film thickness and the manganese valence decreases without any change in the nickel valence. Regardless of their orientation, all the films exhibit reversible capacities of 80-130 mAh g-1. The dependence of the discharge capacity on film thickness indicates a nanosize effect. The electrochemical properties of the high voltage spinel system are significantly dependent on their electronic properties, lattice orientations, and film thicknesses of the electrodes.
Original language | English |
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Pages (from-to) | 365-370 |
Number of pages | 6 |
Journal | Journal of Power Sources |
Volume | 246 |
DOIs | |
Publication status | Published - 2014 Jan 1 |
Externally published | Yes |
Keywords
- Epitaxial thin film
- High voltage positive electrode
- LiNiMnO
- Lithium ion battery
- Surface structure
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering