Professor Noriyoshi Matsumi and his team, in collaboration with researchers from Maruzen Petrochemical Company Ltd., have developed a novel binder for lithium-ion batteries' silicon oxide (SiO) anodes, addressing key challenges such as poor conductivity and significant expansion during charging.
Published in ACS Applied Energy Materials, their study introduces poly(vinylphosphonic acid) (PVPA) as a superior binder compared to conventional options like poly(acrylic acid) (PAA) and poly(vinylidene fluoride) (PVDF). PVPA demonstrated stronger adhesion to copper support, leading to enhanced durability and almost double the discharging capacity compared to PAA-based cells after 200 cycles. The PVPA-based cell also achieved a high discharging capacity of 1300 mAhg-1SiO after the same cycle count, with no observed exfoliation from the current collector.
Maruzen Petrochemical Company Ltd. has established an industrial production process for PVPA, facilitating its potential real-life applications in electric vehicles and other energy storage systems. This breakthrough represents a significant advancement in SiO-based anodes for lithium-ion batteries, promising improved performance and longevity for various applications.
From: EurekAlert!
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