N-Type Doped Silicon Thin Film on a Porous Cu Current Collector as the Negative Electrode for Li-Ion Batteries

作者：Mukanova Aliya; Nurpeissova Arailym; Kim Sung Soo; Myronov Maksym; Bakenov Zhumabay

来源：ChemistryOpen, 2018, 7(1): 92-96.

DOI：10.1002/open.201700162

• lithium-ion batteries
• magnetron sputtering
• n-type doped silicon
• porous current collector
• thin films

This work reports the preparation of a three-dimensional Si thin film negative electrode employing a porous Cu current collector. A previously reported copper etching procedure was modified to develop the porous structures inside a 9 mu m thick copper foil. Magnetron sputtering was used for the deposition of an n-type doped 400 nm thick amorphous Si thin film. Electrochemical cycling of the prepared anode confirmed the effectiveness of utilizing the approach. The designed Si thin film electrode retained a capacity of around 67 mu Ahcm(-2) (1675 mAhg(-1)) in 100th cycle. The improved electrochemical performance resulted in an enhancement of both areal capacity and capacity retention in contrast with flat and rough current collectors that were prepared for comparison.

• 出版日期2018-1