Ultrafast Synthesis of Calcium Vanadate for Superior Aqueous Calcium-Ion Battery
Liyuan Liu,
Yih-Chyng Wu,
Patrick Rozier,
Pierre-Louis Taberna,
Patrice Simon
Affiliations
Liyuan Liu
CIRIMAT, UMR CNRS 5085, Université Paul Sabatier Toulouse III, 118 route de Narbonne, 31062 Toulouse, France; RS2E, Réseau Français sur le Stockage Electrochimique de l’Energie, FR CNRS 3459, 80039 Amiens CEDEX, France
Yih-Chyng Wu
CIRIMAT, UMR CNRS 5085, Université Paul Sabatier Toulouse III, 118 route de Narbonne, 31062 Toulouse, France; RS2E, Réseau Français sur le Stockage Electrochimique de l’Energie, FR CNRS 3459, 80039 Amiens CEDEX, France
Patrick Rozier
CIRIMAT, UMR CNRS 5085, Université Paul Sabatier Toulouse III, 118 route de Narbonne, 31062 Toulouse, France; RS2E, Réseau Français sur le Stockage Electrochimique de l’Energie, FR CNRS 3459, 80039 Amiens CEDEX, France
Pierre-Louis Taberna
CIRIMAT, UMR CNRS 5085, Université Paul Sabatier Toulouse III, 118 route de Narbonne, 31062 Toulouse, France; RS2E, Réseau Français sur le Stockage Electrochimique de l’Energie, FR CNRS 3459, 80039 Amiens CEDEX, France
Patrice Simon
CIRIMAT, UMR CNRS 5085, Université Paul Sabatier Toulouse III, 118 route de Narbonne, 31062 Toulouse, France; RS2E, Réseau Français sur le Stockage Electrochimique de l’Energie, FR CNRS 3459, 80039 Amiens CEDEX, France
Recently, multivalent aqueous calcium-ion batteries (CIBs) have attracted considerable attention as a possible alternative to Li-ion batteries. However, traditional Ca-ion storage materials show either limited rate capabilities and poor cycle life or insufficient specific capacity. Here, we tackle these limitations by exploring materials having a large interlayer distance to achieve decent specific capacities and one-dimensional architecture with adequate Ca-ion passages that enable rapid reversible (de)intercalation processes. In this work, we report the high-yield, rapid, and low-cost synthesis of 1D metal oxides MV3O8 (M=Li, K), CaV2O6, and CaV6O16·7H2O (CVO) via a molten salt method. Firstly, using 1D CVO as electrode materials, we show high capacity 205 mA h g-1, long cycle life (>97% capacity retention after 200 cycles at 3.0 C), and high-rate performance (117 mA h g-1 at 12 C) for Ca-ion (de)intercalation. This work represents a step forward for the development of the molten salt method to synthesize nanomaterials and to help pave the way for the future growth of Ca-ion batteries.
