Carbon-Coated Current Collectors for High-Power Lithium-Ion Secondary Batteries
Abstract
The goal of this project is to develop a viable C-coating process of the current collector in order to improve the overall power performance of the electrode of Li-ion batteries. Two major parts of research works toward this goal were carried out. (1) Al and Cu foils were subjected to high-temperature chemical vapor deposition (T-CVD) to produce surface C-coating, and the resulting foils were used as current collectors for LiFePO4 and Li4Ti5O12. The C-coating remarkably enhanced the power performance of both electrodes. The enhancement was attributed to a combination of two factors--removal of the native oxide layer and modification of surface hydrophobicity--both of which reduced the resistance at the current-collector/ active layer interface. (2) A low-temperature plasma-assisted chemical vapor deposition (PA-CVD) vacuum chamber was built and tested. The design of the chamber allows for roll-to-roll plasma treatment of metal foils under vacuum condition, and it is ready for carry out low-temperature coating processes in the next-year phase of research.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 20, 2011
- Accession Number
- ADA550134
Entities
People
- Nae-lih Wu
Organizations
- National Taiwan University