The Role of Modified Graphene in Cathode Formulations for Lithium-Ion Batteries. (7th August 2015)

• Record Type: Journal Article
• Authors: Arbizzani, Catia; Da Col, Luca; De Giorgio, Francesca; Mastragostino, Marina; Soavi, Francesca
• Is Part Of: ECS transactions. Volume 66:Number 8(2015)
• Page Start: 139
• Page End: 147
• Publication Date: 2015-08-07
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06608.0139ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : We explored the effect of reduced graphene oxide (RGO) on LiNi0.5 Mn1.5 O4 (LNMO) and on 0.6LiMnPO4 –0.4Li3 V2 (PO4 )3 (LMVP) composite cathodes with carbon black (C65). We demonstrated that the effect of RGO depends on the cathode active material. Indeed, RGO improves cycling stability of LNMO cathodes by improving electrode/electrolyte interface stability at high potentials. On the contrary, RGO worsens the performance of LMVP/C65 and it has no effect on LMVP electrodes when it is produced in situ during LMVP synthesis in presence of graphene oxide. Our study indicates that at least 10 wt. % of C65 is necessary for good performance of the poor conductive LMVP.