New Lithium metal polymer solid state battery for an ultra-high energy: Nano C-LiFePO4 versus Nano Li1.2V3O8

Pierre Hovington (1) , Marin Lagacé (1) , Abdelbast Guerfi (1) , Patrick Bouchard (1) , Alain Mauger (2) , Christain Julien (3) , Michel Armand (4) , Karim Zaghib (1)

1 Energy Storage and Conversion, Research Institute of Hydro-Québec
2 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie
3 PHENIX - PHysicochimie des Electrolytes et Nanosystèmes InterfaciauX
4 CICEnergigune

Novel lithium metal polymer solid state batteries with nano C-LiFePO4 and nano Li1.2V3O8 counter-electrodes (average particle size 200 nm) were studied for the first time by in-situ SEM and impedance during cycling. The kinetics of Li-motion during cycling is analyzed selfconsistently together with the electrochemical properties. We show that the cycling life of the nano Li1.2V3O8 is limited by the dissolution of the vanadium in the electrolyte, which explains the choice of nano C-LiFePO4 (1300 cycles at 100% DOD): with this olivine, no dissolution is observed. At high loading and with a stable SEI, in combination with lithium metal, an ultra-high energy density battery was thus newly developed in our laboratory

Mots clés: nano Li1.2V3O8.; nano C-LiFePO4; in-situ SEM; Lithium metal polymer battery

Domaines: Physique [physics]

Pierre Hovington, Marin Lagacé, Abdelbast Guerfi, Patrick Bouchard, Alain Mauger, et al.. New Lithium metal polymer solid state battery for an ultra-high energy: Nano C-LiFePO4 versus Nano Li1.2V3O8. Micro and Nano Letters, 2015, pp.2671-2678. ⟨10.1021/acs.nanolett.5b00326⟩. ⟨hal-01122264⟩