Atomic Layer Fluorination of 5 V Class Positive Electrode Material LiCoPO 4 for Enhanced Electrochemical Performance - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Batteries & Supercaps Année : 2020

Atomic Layer Fluorination of 5 V Class Positive Electrode Material LiCoPO 4 for Enhanced Electrochemical Performance

Eun Jeong Kim
  • Fonction : Auteur
Youn Charles-Blin
  • Fonction : Auteur
Marc Dubois
  • Fonction : Auteur
  • PersonId : 1136676
David Miller
  • Fonction : Auteur

Résumé

The surface fluorination of lithium cobalt phosphate (LiCoPO4, LCP) using a one-step, room temperature processable, easily up-scalable and dry surface modification method with XeF2 as fluorine source was developed. After fluorination, fluorine-rich nanoparticles were observed mainly on the particle surface, which facilitates the improvement of surface stability and electrochemical performance such as cycling stability and rate capability, as the fluorinated LCP can be protected against side reactions with electrolyte or by-products of electrolyte decomposition at high voltage (5 V). More importantly, the direct surface fluorination proved more efficient than adding a fluorinated electrolyte additive (i.e. FEC). These results suggestthat surface fluorination using XeF2 is of great promise for practical applications of high voltage positive materials for lithium ion batteries

Domaines

Chimie
Fichier principal
Vignette du fichier
Kim_2020_BS_Atomiclayer_AAM(1).pdf (1.1 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02881906 , version 1 (04-01-2022)

Identifiants

Citer

Sanghoon Kim, Eun Jeong Kim, Youn Charles-Blin, Katia Guérin, Marc Dubois, et al.. Atomic Layer Fluorination of 5 V Class Positive Electrode Material LiCoPO 4 for Enhanced Electrochemical Performance. Batteries & Supercaps, 2020, ⟨10.1002/batt.202000041⟩. ⟨hal-02881906⟩
133 Consultations
66 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More