PUBLICATION

Advanced Soft Energy Materials Lab

Publication

Publication

46. Development of crosslinked 3D network binder for High-performance silicon anode Lithium-ion Battery
Authors
Shinyoung Lee, Woo-Jin Song*
Journal
한국전지학회지
Date
(2024.09)
Year
2024

Silicon has attracted attention as an anode in high energy density Li-ion batteries owing to its high theoretical capacity and low operating voltage. However, silicon suffers from rapid capacity decay due to the large volume change during a repeated charging and discharging process. To resolve these issues, the design of binders may play an important role in preventing huge volume changes for long cycle life. In this study, the crosslinked polymer, composed of boric acid (BA) and poly (acrylic acid) (PAA) was utilized as a silicon-based anode binder. By forming a three-dimensional (3D) network structure of abundant hydroxyl groups of BA and carboxyl groups of PAA, the cycle performance can be improved by suppressing the volume expansion of silicon. The silicon anode with BA-derived PAA binder accomplished 97.83% of the high-capacity retention with 2275mAh g 1 of the high capacity after 150 cycles. This study has the potential that the BA-derived crosslinked polymers are promising as the silicon binder in high-performance Li-ion batteries.ㅌ