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Ultrafast Synthesis of Calcium Vanadate for Superior Aqueous Calcium-Ion Battery

Abstract : 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 205mAh g-1, long cycle life (>97% capacity retention after 200 cycles at 3.0 C), and high-rate performance (117mAh 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.
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https://hal.archives-ouvertes.fr/hal-03050839
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Thursday, December 10, 2020 - 10:32:29 AM
Last modification on : Wednesday, April 14, 2021 - 3:50:03 PM
Long-term archiving on: : Thursday, March 11, 2021 - 6:58:32 PM

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Liyuan Liu, Yih-Chyng Wu, Patrick Rozier, Pierre-Louis Taberna, Patrice Simon. Ultrafast Synthesis of Calcium Vanadate for Superior Aqueous Calcium-Ion Battery. Research, 2019, 2019, pp.1-11. ⟨10.34133/2019/6585686⟩. ⟨hal-03050839⟩

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