Paper 13351-12
Paper 13351-12
Enhancing silicon anode stability: ultrashort laser micropatterning of Cu current collector for Li-ion batteries
27 January 2025 • 2:35 PM - 2:55 PM PST | Moscone South, Room 214 (Level 2)
Abstract
To enhance the cycle performance of Si electrodes, we engineered and fabricated a micro-structured copper (Cu) current collector (CC) using a high-throughput femtosecond laser direct writing technique. This method addresses the significant volume changes in Si anodes during charging and discharging, which can cause delamination and wrinkling of the active material and Cu CC. By creating micro- structures on the Cu CC, we improved stress relief and adhesion, resulting in improved mechanical stability. Our full cell pouch configurations with structured Cu CC demonstrated a superior capacity retention, significantly outperforming reference cells. This precise and tunable laser micro-structuring technique may be suitable for integration into roll-to-roll processes in Li-ion battery manufacturing for improving cell performance.
Presenter
Yueran Gu
Lawrence Berkeley National Lab. (United States), Univ. of California, Berkeley (United States)
Yueran Gu is a fourth-year PhD candidate in Mechanical Engineering with a concentration in Energy Science and a minor in Material Science Engineering at the University of California, Berkeley. Working under the guidance of Dr. Vassilia Zorba in the Laser Technology Group at Lawrence Berkeley National Laboratory, Gu has focused on the development and application of ultrafast laser technologies in Li-ion batteries.
During her time at UCB and LBNL, Gu has been dedicated to improving the stability of silicon anodes in Li-ion batteries. Her research focuses on two main directions: developing new materials and creating innovative electrode architectures by leveraging modern laser technologies. Her work aims to enhance the performance and stability of Li-ion batteries, which are critical for the advancement of energy storage solutions.