Journal
SOLID STATE IONICS
Volume 308, Issue -, Pages 54-60Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2017.05.008
Keywords
Surface coating; Lithium tantalate; Lithium niobate; Lithium cobalt oxide; Pulsed laser deposition; Lithium diffusion coefficients
Categories
Funding
- Grants-in-Aid for Scientific Research [15H03872] Funding Source: KAKEN
Ask authors/readers for more resources
Amorphous lithium tantalate (LTaO)- and lithium niobate (LNbO)-coated LiCoO2 (LCO) thin film electrodes were fabricated by pulsed laser deposition (PLD). The LTaO- and LNbO-coated LCOs showed lower interfacial resistances and high-rate charge discharge properties as compared with a bare LCO. The contribution of the LTaO and LNbO coatings to the electrochemical properties was considered using lithium diffusion and surface analysis. Tracer lithium diffusion coefficients (D-L1*) of the LTaO and LNbO thin films were determined by secondary ion mass spectroscopy (SIMS) using Li-6 and Li-7 isotopes. Surface analysis of the LTaO- and LNbO-coated LCOs before and after electrochemical measurement was performed using X-ray photoemission spectroscopy (XPS). The LTaO and LNbO thin films indicated fast lithium-ion diffusion; moreover, no degradation of the surface of the LNbO-coated LCO was observed during the electrochemical measurements. Therefore, LNbO is considered an excellent coating material for decreasing interfacial resistance.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available