In:
Research, American Association for the Advancement of Science (AAAS), Vol. 2019 ( 2019-01)
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 M V 3 O 8 ( M = Li , K), CaV 2 O 6 , and CaV 6 O 16 ·7H 2 O (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.
Type of Medium:
Online Resource
ISSN:
2639-5274
DOI:
10.34133/2019/6585686
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2019
detail.hit.zdb_id:
2949955-0
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