Effect of ultrasound irradiation on deposition of Au nanoparticles on carbon-coated cathode material

Autor:	Turtogtokh Enkhtuya, Tsermaa Galya, Hirokazu Okawa, Yasuyuki Tanaka, Katsuyasu Sugawara, Yuki Ono, Takahiro Kato
Rok vydání:	2019
Předmět:	010302 applied physics Materials science Physics and Astronomy (miscellaneous) Radical General Engineering General Physics and Astronomy Nanoparticle Electron 01 natural sciences Redox Ion Chemical engineering 0103 physical sciences Electrical conductor Ultrasound irradiation Deposition (law)
Zdroj:	Japanese Journal of Applied Physics. 58:SGGD17
ISSN:	1347-4065 0021-4922
DOI:	10.7567/1347-4065/ab12cd
Popis:	The cathode material LiNi0.5Mn1.5O4 (LMNO) has attracted attention as a component of lithium-ion batteries for electro vehicles because it has a high discharge voltage of 4.7 V versus Li/Li+ via the redox potential of Ni4+/2+. However, the low electronic conductivity of the LMNO relates to a low discharge capacity at high current densities. A conductive carbon coating is known to improve this cathode material's electronic conductivity. In this study, we performed Au nanoparticles (NPs) deposition onto the carbon-coated LMNO (LMNO/C) using ultrasound irradiation. The carbon layer of LMNO/C produces an Au(III) ion that efficiently accepts electrons released from radicals generated by ultrasound irradiation. As a result, the size and morphology of the Au NPs, deposited onto the LMNO/C, were different when compared with the Au NPs deposited onto the LMNO. The Au NPs deposition onto the cathode material using ultrasound improved LMNO's electronic conductivity and increased the discharge capacity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6593651a10f3801e0d5263b619717ee5 https://doi.org/10.7567/1347-4065/ab12cd Zobrazit plný text záznamu