Nanowire K0.19MnO2 from hydrothermal method as cathode material for aqueous supercapacitors of high energy density

Zhang, B.H.; Liu, Yu; Chang, Zheng; Yang, Yuxin; Wen, Zubiao; Wu, Yuping

doi:10.1016/j.electacta.2014.03.026

Cited by 23 publications

(6 citation statements)

References 39 publications

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“…A recent technological innovation in energy storage is about hybrid cells, where it attempts to integrate the superiorities of high energy output of secondary batteries and high power delivery of electrochemical capacitors. − So far, Li-based and Na-based hybrid cells have been extensively reported. − As for K-based systems, only a few K-ion hybrid capacitors were reported. − …”

Section: Introductionmentioning

confidence: 99%

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K₂Ti₆O₁₃ Microscaffolds

Dong

Xing

et al. 2018

ACS Appl. Mater. Interfaces

218

130

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To fill the gap between batteries and supercapacitors requires integration of the following features in a single system: energy density well above that of supercapacitors, cycle life much longer than Li-ion batteries, and low cost. Along this line, we report a novel nonaqueous potassium-ion hybrid capacitor (KIC) that employs an anode of KTiO (KTO) microscaffolds constructed by nanorods and a cathode of N-doped nanoporous graphenic carbon (NGC). KTiO microscaffolds are studied for potential applications as the anode material in potassium-ion storage for the first time. This material exhibits an excellent capacity retention of 85% after 1000 cycles. In addition, the NGC//KTO KIC delivers a high energy density of 58.2 Wh kg based on the active mass in both electrodes, high power density of 7200 W kg, and outstanding cycling stability over 5000 cycles. The usage of K ions as the anode charge carrier instead of Li ions and the amenable performance of this device suggest that hybrid capacitor devices may welcome a new era of beyond lithium.

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Section: Introductionmentioning

confidence: 99%

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K₂Ti₆O₁₃ Microscaffolds

Dong

Xing

et al. 2018

ACS Appl. Mater. Interfaces

218

130

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“…Metal conversion-alloying oxides have shown the capability of accommodating large number of alkali metal ions into their structure and hence are promising materials to be employed as battery electrodes 1,2 . Out of metal conversionalloying oxides the ones with the spinel structure in particular have been serving as battery electrodes due to their high capacity of lithium uptake, being the lithium transport faster in closed pack arrays of the large polarizable anions [3][4][5][6] . Ideal Spinel structures have the general form A[B 2 ]O 4 , where A refers to the cations on tetrahedral (8a) sites and B to the cations on octahedral (16d) sites of a cubic structure of the space group symmetry F d3m.…”

Section: Introductionmentioning

confidence: 99%

Structure rearrangements induced by lithium insertion in metal alloying oxide mixed spinel structure studied by x-ray absorption near-edge spectroscopy

Rezvani

Mijiti

Gunnella

et al. 2020

Journal of Physics and Chemistry of Solids

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“…1, right side). [56], and K x MnO 2 [57,58]), polyanionic compounds (e.g., LiFePO 4 [59] and Na 2 VTi(PO 4 ) 3 [60]), Prussian blue analogs (PBAs) (e.g., Na 2 NiFe(CN) 6 [61] [63] and LiCoO 2 [64]). In contrast, many anode materials used for non-AH devices have much lower redox potentials beyond hydrogen evolution and are impossible to be employed in AHSCs.…”

Section: Design Of Battery-type Electrodes In Ahscsmentioning

confidence: 99%

Recent advances in materials and device technologies for aqueous hybrid supercapacitors

Gui

et al. 2021

Sci. China Mater.

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Aqueous hybrid supercapacitors (AHSCs) offer potential safety and eco-friendliness compared with conventional electrochemical energy storage devices that use toxic and flammable organic electrolytes. They can serve as the bridge between aqueous batteries and aqueous supercapacitors by combining the advantages of high energy of the battery electrode and high power as well as long lifespan of the capacitive electrode. Over the past few decades, extensive research efforts have been devoted to developing advanced materials and fascinating device architectures for AHSCs. However, further development related to the compatibilities between the battery-type electrode and capacitive electrode remains stagnant mainly due to discrepancy encountered in terms of reaction kinetics and capacity. This review focuses on the recent progress made in the field of AHSCs via elucidating the main concepts on the design of battery and capacitive electrodes and emerging electrolytes. In particular, ingenious AHSCs that possess either better flexibility toward materials selection or better device functionality such as those with "dual-ion" energy storage mechanism and non-polarity feature are also discussed. Recent advances and unresolved issues in multivalent ion hybrid devices (in particular, zinc-ion AHSCs) are further outlined. Finally, future research directions and challenges for AHSCs are presented, which are anticipated to deliver higher energy and demonstrate greater multifunctionalities for more breakthrough technology applications.

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Nanowire K0.19MnO2 from hydrothermal method as cathode material for aqueous supercapacitors of high energy density

Cited by 23 publications

References 39 publications

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K₂Ti₆O₁₃ Microscaffolds

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K₂Ti₆O₁₃ Microscaffolds

Structure rearrangements induced by lithium insertion in metal alloying oxide mixed spinel structure studied by x-ray absorption near-edge spectroscopy

Recent advances in materials and device technologies for aqueous hybrid supercapacitors

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Nanowire K0.19MnO2 from hydrothermal method as cathode material for aqueous supercapacitors of high energy density

Cited by 23 publications

References 39 publications

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K2Ti6O13 Microscaffolds

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K2Ti6O13 Microscaffolds

Structure rearrangements induced by lithium insertion in metal alloying oxide mixed spinel structure studied by x-ray absorption near-edge spectroscopy

Recent advances in materials and device technologies for aqueous hybrid supercapacitors

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Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K₂Ti₆O₁₃ Microscaffolds

Novel Potassium-Ion Hybrid Capacitor Based on an Anode of K₂Ti₆O₁₃ Microscaffolds