期刊
ADVANCED ENERGY MATERIALS
卷 7, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201601491
关键词
aqueous rechargeable batteries; electrochemical energy storage; metal-organic frameworks; Prussian blue analogues
类别
资金
- National Research Council of Science & Technology (NST) of Republic of Korea
- KIST Institutional Program [2E26330]
- Ministry of Science & ICT (MSIT), Republic of Korea [2E27090] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [CAP-14-02-KITECH] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Despite the unique advantages of the metal-organic framework of Prussian blue analogues (PBAs), including a favorable crystallographic structure and facile diffusion kinetics, the capacity of PBAs delivered in aqueous systems has been limited to approximate to 60 mA h g(-1) because only single species of transition metal ions incorporated into the PBAs are electrochemically activated. Herein, vanadium hexacyanoferrate (V/Fe PBA) is proposed as a breakthrough to this limitation, and its electrochemical performance as a cathode for aqueous rechargeable batteries (ARBs) is investigated for the first time. V/Fe PBAs are synthesized by a simple co-precipitation method with optimization of the acidity and molar ratios of precursor solutions. The V/Fe PBAs provide an improved capacity of 91 mA h(-1) under a current density of 110 mA g(-1) (C-rate of approximate to 1.2 C), taking advantage of the multiple-electron redox reactions of V and Fe ions. Under an extremely fast charge/discharge rate of 3520 mA g(-1), the V/Fe PBA exhibits a sufficiently high discharge capacity of 54 mA h g(-1) due to its opened structure and 3D hydrogen bonding networks. V/Fe PBA-based ARBs are the most promising candidates for large-scale stationary energy storage systems due to their high electrochemical performance, reasonable cost, and high efficiency.
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