Sonochemical synthesis of Au/Pd nanoparticles on the surface of LiFePO₄/C cathode material for lithium-ion batteries

• Published in: Japanese Journal of Applied Physics Vol. 60; no. SD; p. SDDD06
• Main Authors: Yoshida, Kotaro, Okawa, Hirokazu, Ono, Yuki, Kato, Takahiro, Sugawara, Katsuyasu
• Format: Journal Article
• Language: English
• Published: Tokyo IOP Publishing 01.07.2021; Japanese Journal of Applied Physics
• Subjects: Cathodes; Charge materials; Charge transfer; Core-shell particles; core–shell; Electrode materials; Gold; Lithium; lithium iron phosphate; Lithium-ion batteries; lithium-ion battery; nanoparticle; Nanoparticles; Palladium; Phase transitions; Rechargeable batteries; ultrasound
• ISSN: 0021-4922; 1347-4065
• DOI: 10.35848/1347-4065/abeff1

Abstract With the aim of investigating the deposition of Au/Pd core–shell nanoparticles (NPs) on cathode materials to decrease charge transfer resistance, Au/Pd core–shell NPs were successfully synthesized and deposited on LiFePO 4 coated with carbon (LiFePO 4 /C) using ultrasound irradiation. Transmission electron microscopy observation confirmed that dispersed Au/Pd NPs with an average particle size of 7.2 nm were deposited on LiFePO 4 /C. An X-ray diffraction measurement evidenced a peak shifting from 38.2° to 39.1° upon calcination at 400 °C in Ar atmosphere, which can be attributed to the phase transition of the Au/Pd NPs from core–shell to alloy.