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|a 10.1021/acs.langmuir.5c01812
|2 doi
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|a pubmed25n1561.xml
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|a (NLM)40796300
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|a DE-627
|b ger
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|e rakwb
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|a eng
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|a Zhang, Ke
|e verfasserin
|4 aut
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|a Flexible Iron-Ion Hybrid Capacitor Based on a MnO2 Electrode
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|c 2025
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 27.08.2025
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Aqueous Fe-ion hybrid capacitors, with high safety, low cost, and environmental friendliness, have attracted considerable attention as an emerging energy storage device. However, Fe-ion-based energy storage systems still face challenges, such as narrow voltage windows, limited energy density, and harsh fabrication conditions. To address these issues, this work fabricates an aqueous Fe-ion hybrid capacitor using low-cost activated carbon as the anode, manganese dioxide (MnO2) as the cathode, with an FeSO4 + NH4Cl aqueous electrolyte, successfully expanding the voltage window to 0-1.2 V. The atomic molecular dynamics simulations confirm the potential of MnO2 as a cathode material, and the spiny nanostructured MnO2 shows a large specific surface area and a stable tunnel structure, which facilitates the intercalation/deintercalation of Fe2+ ions. Consequently, the assembled device achieved a specific capacitance of 835 mF cm-2 at 1 mA cm-2 and a surface energy density of 167 μWh cm-2 with a capacitance retention of 97.2% after 3000 cycles. Furthermore, to meet wearable electronics requirements, a flexible device was assembled by integrating a carboxymethyl cellulose-poly(vinyl alcohol) hydrogel soft-packaging material. The results show that the flexible device exhibits excellent bending resistance. The further assembled flexible Fe-ion supercapacitors demonstrate a high energy storage potential. Under a current density test of 1 mA cm-2, the calculated specific capacitance is 682.4 mF cm-2, and the areal energy density is 136.48 μWh cm-2. The further assembled flexible Fe-ion supercapacitors demonstrate high energy storage potential. Under a current density test of 1 mA cm-2, the calculated specific capacitance is 682.4 mF cm-2, and the areal energy density is 136.48 μWh cm-2. Similarly, in the cycling performance test, the device retains 92.6% of its capacity after 3000 cycles. This study provides technical references for the development and practical application of flexible Fe-ion-based energy storage devices
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|a Journal Article
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1 |
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|a Bai, Yafeng
|e verfasserin
|4 aut
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1 |
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|a Wang, Liying
|e verfasserin
|4 aut
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700 |
1 |
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|a Zhang, Shuli
|e verfasserin
|4 aut
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1 |
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|a You, Zhuo
|e verfasserin
|4 aut
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1 |
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|a Yang, Xijia
|e verfasserin
|4 aut
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700 |
1 |
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|a Lü, Wei
|e verfasserin
|4 aut
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773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 41(2025), 33 vom: 26. Aug., Seite 22011-22019
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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773 |
1 |
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|g volume:41
|g year:2025
|g number:33
|g day:26
|g month:08
|g pages:22011-22019
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|u http://dx.doi.org/10.1021/acs.langmuir.5c01812
|3 Volltext
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