An Aqueous Ca‐ion Full Cell Comprising BaHCF Cathode and MCMB Anode

Adil, Md.; Dutta, Prasit Kumar; Mitra, Sagar

doi:10.1002/slct.201800419

Cited by 30 publications

(27 citation statements)

References 24 publications

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“…In addition, under a high current density of 0.4 mA cm −2 , discharge capacities of 74.7 and 90.2 mAh m −2 are achieved in the 1 and the 5 M electrolytes, respectively (Figure 5d). Notably, the average discharge potential of the InHCF film in the 5 M electrolyte is 0.63 V at 0.05 mA cm −2 , which is much higher than the values obtained in the reported hexacyanoferrates [15,[32][33][34][35]37,38] and other reported cathodes [38,39] (Figure 5e). Furthermore, the Fe 2+ /Fe 3+ redox couple in the InHCF film also gives rise to electrochromism accompanying with the energy storage process.…”

Section: Spectra-electrochemical Characterizations Of the Inhcf Filmscontrasting

confidence: 59%

A Ca‐Ion Electrochromic Battery via a Water‐in‐Salt Electrolyte

Tong

Kang

Wan

et al. 2021

Adv Funct Materials

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Multivalent-ion batteries with electrochromic functionality are an emerging green technology for development of low-carbon society. Compared to Mg 2+ , Zn 2+ and Al 3+ , Ca 2+ has a low polarization strength similar to that of Li + , therefore Ca 2+ for electrochromism and battery can avoid kinetic issues caused by other multivalent-ions with high polarization strength. Here, by exploiting Ca-ion carriers for electrochromism and a water-in-salt (WIS) Ca(OTF) 2 electrolyte for the first time, a new and safe aqueous Ca-ion electrochromic battery (CIEB) has been demonstrated. The WIS Ca(OTF) 2 electrolyte demonstrates enhanced anion-cation interactions and decreased water activity. Vanadium oxide (VO x ) and indium hexacyanoferrate (InHCF) films are respectively developed as anode and cathode because of their stable and high-rate Ca 2+ insertion/extraction, as well as matched electrochromism. The CIEB demonstrates a stable and high-rate capability, a high energy density of 51.4 mWh m −2 at a power density of 1737.3 mW m −2 , and a greenish yellow-to-black electrochromism. The presented results are beneficial for understanding redox kinetics in WIS electrolytes, and inspire researches on batteries and electrochromism with multivalent-ions.

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Section: Spectra-electrochemical Characterizations Of the Inhcf Filmscontrasting

confidence: 59%

A Ca‐Ion Electrochromic Battery via a Water‐in‐Salt Electrolyte

Tong

Kang

Wan

et al. 2021

Adv Funct Materials

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“…In this regard, remarkable advancements have been made in aqueous metal-ion (e.g. Mg 2+ , Zn 2+ , Ca 2+ , Al 3+ ) batteries [14][15][16][17]. Among these aqueous metal-ion systems, Zn-ion batteries (ZIBs) are particularly promising due to the massive merits of low cost (ca.…”

Section: Introductionmentioning

confidence: 99%

Structural engineering of cathodes for improved Zn-ion batteries

Huang

Xie

et al. 2021

Journal of Energy Chemistry

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Aqueous zinc-ion batteries (ZIBs) are attracting considerable attention because of their low cost, high safety and abundant anode material resources. However, the major challenge faced by aqueous ZIBs is the lack of stable and high capacity cathode materials due to their complicated reaction mechanism and slow Zn-ion transport kinetics. This study reports a unique 3D 'flower-like' zinc cobaltite (ZnCo 2 O 4-x ) with enriched oxygen vacancies as a new cathode material for aqueous ZIBs. Computational calculations reveal that the presence of oxygen vacancies significantly enhances the electronic conductivity and accelerates Zn 2+ diffusion by providing enlarged channels. The as-fabricated batteries present an impressive specific capacity of 148.3 mAh g À1 at the current density of 0.05 A g À1 , high energy (2.8 Wh kg À1 ) and power densities (27.2 W kg À1 ) based on the whole device, which outperform most of the reported aqueous ZIBs. Moreover, a flexible solid-state pouch cell was demonstrated, which delivers an extremely stable capacity under bending states. This work demonstrates that the performance of Zn-ion storage can be effectively enhanced by tailoring the atomic structure of cathode materials, guiding the development of low-cost and eco-friendly energy storage materials.

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“…Other carbonaceous compounds such as mesocarbon microbeads (MCMB), [ 45 ] multi‐wall carbon nanotubes (MWCNTs), [ 46 ] 2D graphene and its analogies, [ 54–58 ] etc., have also been investigated as CIBs anode either by experiments or simulations. The experiments on MCMB anode in aqueous CIBs and MWCNTs anode in organic CIBs confirmed their feasibility in storing Ca 2+ , whereas the intrinsic electrochemical behaviors were not illustrated.…”

Section: Anode Materialsmentioning

confidence: 99%

“…Average reaction potentials, reversible capacity, and specific energy of the state‐of‐the‐art a) experimental [ 30,45,49,71,72,76–83,85–89,91–95,97,99 ] and b) computational [ 104,105 ] cathode materials for CIBs.…”

Section: Cathode Materialsmentioning

confidence: 99%

Recent Advances and Perspectives on Calcium‐Ion Storage: Key Materials and Devices

Yao

et al. 2020

Advanced Materials

133

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The urgent demand for cost‐effective energy storage devices for large‐scale applications has led to the development of several beyond‐lithium energy storage systems (EESs). Among them, calcium‐ion batteries (CIBs) are attractive due to abundant calcium resources, excellent volumetric and gravimetric capacities of Ca metal anode, and potential high energy density coming from the multivalent feature of Ca‐ion. Therefore, the exploration of CIBs electrode materials and the construction of CIBs devices are gaining increasing research interest. Relevant publications cover a wide range of materials by both theoretical and experimental investigations, whereas the performances of rocking‐chair CIBs have been unsatisfactory. Meanwhile, multi‐ion strategies using more than one ion as the charge carrier have been demonstrated to be feasible and promising options in realizing room temperature CIBs. The summary and reflection of previous studies would provide useful information for future exploration and optimization. In this circumstance, this paper overviews the reported CIBs electrode materials, including both anode and cathode, and presents the latest progress of multi‐ion strategies in CIBs. Fundamental challenges, potential solutions, and opportunities are accordingly proposed, mimicking other more mature EESs. This review may promote the development of electrode materials and accelerate the construction of low‐cost and high‐performance CIBs.

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An Aqueous Ca‐ion Full Cell Comprising BaHCF Cathode and MCMB Anode

Cited by 30 publications

References 24 publications

A Ca‐Ion Electrochromic Battery via a Water‐in‐Salt Electrolyte

A Ca‐Ion Electrochromic Battery via a Water‐in‐Salt Electrolyte

Structural engineering of cathodes for improved Zn-ion batteries

Recent Advances and Perspectives on Calcium‐Ion Storage: Key Materials and Devices

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