Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7730054 | Journal of Power Sources | 2016 | 7 Pages |
Abstract
We develop a clad foil current collector with a high tensile strength that endures a large volume change in the active material during the charge and discharge, such as the Si-based materials. The nano-Si negative electrode with the clad current collector retains 76% of the initial capacity after 40 cycles, while the capacity of the nano-Si electrode with a conventional Cu foil drops to less than 70% only after 10 cycles. A full cell with the SiO negative electrode and the LiFePO4 positive electrode retains more than 90% of its capacity at the 10th cycle after 800 cycles. The conventional rolled Cu foil wrinkles during the cycling test. The high-strength clad current foil hardly deforms during the test regardless of the electrode size.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Riki Kataoka, Yoshimitsu Oda, Ryouji Inoue, Mitsunori Kitta, Tetsu Kiyobayashi,