Nickel ferrocyanides for aqueous ammonium ion batteries

Yu, Haoxiang; Fan, Leiyu; Yan, Huihui; Deng, Chenchen; Yan, Lei; Shu, Jie; Wang, Zhenbo

doi:10.1039/d2qi00265e

Cited by 21 publications

(13 citation statements)

References 39 publications

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“…On the other hand, compared with the previously developed cathodes (metal-organic PBAs and some organic compounds) with stable discharge plateau, our VOPO 4 •2H 2 O cathode delivers a superior speci c capacity as shown in Fig. 2f [30][31][32][33][34][35][36][37][38][39][40] . The combination of stable charge/discharge potential plateau and high speci c capacity makes this material more appealing compared with the various conventional cathode materials.…”

Section: Resultsmentioning

confidence: 90%

Stable Discharge Plateau Induced by Reversible Ammonium Ion Intercalation in Layered VOPO4·2H2O

Ye¹,

Pang²,

Lu³

et al. 2022

Preprint

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The non-metal ammonium (NH4+) ion carrier has attracted tremendous interests for aqueous energy storage owing to the light molar mass and small hydrated ionic size. Nevertheless, the NH4+ storage is severely challenged by that the as-reported cathode materials generally fail to satisfy the requirements on high capacity and stable working potential simultaneously up to date. Herein, we demonstrated that VOPO4∙2H2O with a layered framework and two-dimensional channels can reversibly host NH4+ ion with a high specific capacity of 148.6 mAh g− 1 at 0.1 A g− 1. More importantly, very stable discharge potential plateau at 0.4 V was achieved, which comes from the reversible intercalation/de-intercalation of NH4+ in the interlayer spacing followed by an alternated stacking configuration. We revealed the crystal water molecules in the interlayer of VOPO4 play a critical role in the NH4+ ion storage performance. Theoretical DFT calculations suggest a unique crystal water substitution process by ammonium ion during the intercalation process. Our results realize the first inorganic compound with very stable working voltage for NH4+ storage, and also contributes the fundamental understanding of the intercalation/de-intercalation of NH4+ ions in layered hydrated phosphates for clean energy storage.

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Section: Resultsmentioning

confidence: 90%

Stable Discharge Plateau Induced by Reversible Ammonium Ion Intercalation in Layered VOPO4·2H2O

Ye¹,

Pang²,

Lu³

et al. 2022

Preprint

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“…Wang et al used Na + to replace Ni + in Ni 2 Fe(CN) 6 partially, and the structure was gradually changed from the cubic phase to the rhombic phase. 121 The XRD spectrum can show this phenomenon as in Fig. 13e, where the appearance of splitting of (220), (420), and (440) diffraction peaks indicates the presence of two phases.…”

Section: Design Of Practical Electrode Materialsmentioning

confidence: 85%

Ammonium-ion energy storage devices for real-life deployment: storage mechanism, electrode design and system integration

Sun,

Yin,

Yang

et al. 2023

Energy Environ. Sci.

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“…Most recently, Na doping to optimize the electrochemical performance of Na 2x Ni 2À x Fe-(CN) 6 has been applied. [109] It is found that nickel ferrocyanide after a partial substitution of nickel with sodium (Na 1.5 Ni 1.25 Fe(CN) 6 ) can increase its working voltage and thus improve the reversible capacity to 56.1 mAh g À 1 after 150 cycles. Besides, the pre-insertion is demonstrated to be an effective strategy in battery systems, [110][111][112] which can enhance the structural stability and ionic conductivity, thus accelerating the diffusion of NH 4…”

Section: Intercalation-type Hosts With 3d Diffusion Channelsmentioning

confidence: 99%

“…reported well‐dispersed NaFe[Fe(CN) 6 ] nanocubes with an edge length of 500 nm as the NH 4 + host for AIBs, [102] maintaining 78 % of initial capacity after 50 000 cycles. Most recently, Na doping to optimize the electrochemical performance of Na 2x Ni 2−x Fe(CN) 6 has been applied [109] . It is found that nickel ferrocyanide after a partial substitution of nickel with sodium (Na 1.5 Ni 1.25 Fe(CN) 6 ) can increase its working voltage and thus improve the reversible capacity to 56.1 mAh g −1 after 150 cycles.…”

Section: Electrode Materials For Aibsmentioning

confidence: 99%

Ammonium Ion Batteries: Material, Electrochemistry and Strategy

Zheng

et al. 2023

Angewandte Chemie

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Ammonium‐ion batteries (AIBs) have recently attracted increasing attention in the field of aqueous batteries owing to their high safety and fast diffusion kinetics. The NH4+ storage mechanism is quite different from that of spherical metal ions (e.g. Li+, Na+, K+, Mg2+, and Zn2+) because of the formation of hydrogen bonds between NH4+ and host materials. Although many materials have been proposed as electrode materials for AIBs, their performances hardly meet the requirement of future electrochemical energy storage devices. It is thus urgent to design and exploit advanced materials for AIBs. This review highlights the state‐of‐the‐art research on AIBs. The insights into the basic configuration, operating mechanism and recent progress of electrode materials and corresponding electrolytes for AIBs have been comprehensively outlined. The electrode materials are classified and compared according to different NH4+ storage behaviour in the structure. The challenges, design strategies and perspectives are also discussed for the future development of AIBs.

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Nickel ferrocyanides for aqueous ammonium ion batteries

Abstract: In this report, we design a structural optimization in Ni2Fe(CN)6 through a partial substitution of nickel by sodium, and investigate the electrochemical performance of a series of Na2xNi2-xFe(CN)6 (x =...

Cited by 21 publications

References 39 publications

Stable Discharge Plateau Induced by Reversible Ammonium Ion Intercalation in Layered VOPO4·2H2O

Stable Discharge Plateau Induced by Reversible Ammonium Ion Intercalation in Layered VOPO4·2H2O

Ammonium-ion energy storage devices for real-life deployment: storage mechanism, electrode design and system integration

Ammonium Ion Batteries: Material, Electrochemistry and Strategy

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