γ′-V 2 O 5 Polymorph: A Genuine Zn Intercalation Material for Nonaqueous Rechargeable Batteries

Ankush Bhatia (1) , Jiahui Xu (1) , Jean-Pierre Pereira-Ramos (1) , Gwenaelle Rousse (2) , Rita Baddour- Hadjean (1)

1 ICMPE - Institut de Chimie et des Matériaux Paris-Est
2 Collège de France - Chaire Chimie du solide et énergie

The electrochemical properties of the puckered layered '-V 2 O 5 polymorph as cathode material in a non-aqueous Zn-metal cell using acetonitrile-Zn(CF 3 SO 3) 2 electrolyte are investigated here for the first time. The typical galvanostatic profile in the 2 V-0.3 V vs. Zn 2+ /Zn voltage range shows a sloping discharge curve involving a capacity of 130 mAh g-1 at C/20 in one single step centered at 0.9 V vs. Zn 2+ /Zn. The structural response of '-V 2 O 5 during the discharge-charge cycle is investigated by ex-situ X-ray diffraction (XRD) and Raman spectroscopy. Up to 0.41 Zn mol-1 can be accommodated between the '-V 2 O 5 layers, inducing only a moderate interlayer

Domaines: Chimie

Ankush Bhatia, Jiahui Xu, Jean-Pierre Pereira-Ramos, Gwenaelle Rousse, Rita Baddour- Hadjean. γ′-V 2 O 5 Polymorph: A Genuine Zn Intercalation Material for Nonaqueous Rechargeable Batteries. Chemistry of Materials, 2021, ⟨10.1021/acs.chemmater.1c03739⟩. ⟨hal-03504877⟩