Dramatic enhancement of the electrochemical property of nano-fiber Li[Ni0.9Co0.05Al0.05]O2 as a lithium-ion battery cathode material using a polypyrrole coating

Autor:	Seong-Jae Kim, Eui Jeong Park, Hae In Kim, Jong-Tae Son, Hyun Ju Jang
Rok vydání:	2021
Předmět:	Conductive polymer Materials science General Physics and Astronomy Electrolyte engineering.material Electrochemistry Polypyrrole Lithium-ion battery chemistry.chemical_compound chemistry Chemical engineering Coating Nanofiber engineering Layer (electronics)
Zdroj:	Journal of the Korean Physical Society. 79:567-572
ISSN:	1976-8524 0374-4884
DOI:	10.1007/s40042-021-00261-5
Popis:	The Li[Ni0.9Co0.05 Al0.05]O2 (NCA) cathode material was continuously coated with polypyrrole (ppy), which is a conductive polymer, to improve its life-cycle characteristics. The thickness of the coating layer was about 4.2 nm. The electrochemical performance was improved by dry-coating ppy on NCA nanofibers, which reduced side reactions with the electrolyte. After 50 cycles at 0.5 C, the ppy-coated NCA had a capacity retention of 83.1%, which was higher than that of the pristine NCA (73.7%). Furthermore, the initial discharge capacity was 218.8 mAhg−1 at 0.1 C, which was 26.1% higher than that of the pristine NCA. From the impedance measurement, the resistance of NCA@ppy was found to be lower than that of pristine NCA.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::25a0ef3531948a9bca7e0f2bd05431ec https://doi.org/10.1007/s40042-021-00261-5 Zobrazit plný text záznamu Full text from SpringerLink