Enhanced electrochemical performance of li-ion battery via ultrasonic-assisted inorganic-rich and thin SEI layer

Sunghyun Jie; Joonhee Kang; Seunghun Baek; Byeongyong Lee

doi:10.1016/j.ultsonch.2023.106620

Enhanced electrochemical performance of li-ion battery via ultrasonic-assisted inorganic-rich and thin SEI layer

Ultrason Sonochem. 2023 Nov:100:106620. doi: 10.1016/j.ultsonch.2023.106620. Epub 2023 Sep 23.

Authors

Sunghyun Jie¹, Joonhee Kang², Seunghun Baek³, Byeongyong Lee⁴

Affiliations

¹ School of Mechanical Engineering, Pusan National University, Busan 46241, Republic of Korea.
² Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Republic of Korea. Electronic address: j.kang@pusan.ac.kr.
³ School of Mechanical Engineering, Pusan National University, Busan 46241, Republic of Korea. Electronic address: baeksh@pusan.ac.kr.
⁴ School of Mechanical Engineering, Pusan National University, Busan 46241, Republic of Korea. Electronic address: blee1015@pusan.ac.kr.

Abstract

Lithium-ion batteries (LIBs) stand as a compelling solution to energy source transition in various applications such as the vehicle industry due to their energy and power density. However, the impact of mechanical factors on them remains understudied. Of particular interest is the effect of vibration, an inherent characteristic of vehicles, on battery performance. Ultrasound has been reported to improve mass transfer and surface cleaning, yet its effects on LIBs are still not thoroughly investigated. This study investigates the influence of ultrasound on the solid electrolyte interphase (SEI) layer, resulting in a thin, inorganic-rich layer. The induced SEI layer alteration improves charge transfer, showing enhanced kinetics. We also reveal that ultrasound application enhances cycling stability, maintains discharge capacity at high charging rates, and facilitates inorganic-rich SEI layer creation. This novel combination of ultrasound and LIBs presents a promising pathway for achieving high-performance batteries.

Keywords: LiF; Lithium-ion battery; Surface layer; Ultrasound; Vibration.