2017
DOI: 10.1021/jacs.7b04471
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Abstract: Rechargeable aqueous Zn/MnO battery chemistry in a neutral or mildly acidic electrolyte has attracted extensive attention recently because all the components (anode, cathode, and electrolyte) in a Zn/MnO battery are safe, abundant, and sustainable. However, the reaction mechanism of the MnO cathode remains a topic of discussion. Herein, we design a highly reversible aqueous Zn/MnO battery where the binder-free MnO cathode was fabricated by in situ electrodeposition of MnO on carbon fiber paper in mild acidic Z… Show more

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Cited by 1,385 publications
(1,167 citation statements)
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References 28 publications
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“…They correspond well to the two potential plateaus in the charge/discharge curves (Figure e). The results certify the multiple ion intercalation of the MnO 2 composite, which is composed of the initially H + ion and the followed Zn 2+ ion . For both kinds of the cathodes, the self‐branched structured samples achieve the largest current density and the smallest potential difference between the redox peaks (Figure i,m).…”
Section: Resultssupporting
confidence: 54%
“…They correspond well to the two potential plateaus in the charge/discharge curves (Figure e). The results certify the multiple ion intercalation of the MnO 2 composite, which is composed of the initially H + ion and the followed Zn 2+ ion . For both kinds of the cathodes, the self‐branched structured samples achieve the largest current density and the smallest potential difference between the redox peaks (Figure i,m).…”
Section: Resultssupporting
confidence: 54%
“…Moreover, its practical use is restricted by the low loading of active material. Meanwhile, compared with Zn 2+ , the monovalent H + with smaller ion radius shows high ion diffusion kinetics, and thus the utilization of H + insertion is vital to improve the rate performance of Zn‐MnO 2 battery . By tuning nanostructure of MnO 2 cathode, H + and Zn 2+ synergistic intercalation mechanism can be obtained, which is the key to improve the electrochemical performance of Zn‐MnO 2 battery, including capacity, cycling stability, and rate capability.…”
mentioning
confidence: 99%
“…Akhtenskite‐structure MnO 2 (ε‐MnO 2 ) is a metastable phase composed of face‐shared [MnO 6 ] and [YO 6 ] octahedral (Y means vacancy), where Mn 4+ cations randomly occupy 50% of the octahedral positions of the hexagonal‐close‐packed (hcp) oxygen sublattice . Wang et al prepared the composite electrode of ε‐MnO 2 nanoflakes and carbon fiber paper by in situ electrodeposition. And the discharge capacity of the composite electrode is 290 mAh/g (Figure C).…”
Section: Manganese‐based Oxidesmentioning
confidence: 99%
“…Reproduced with permission from Ref. , Copyright 2017, ACS Publications. D, Schematic of galvanostatic discharge, including D1, D2, and D3 steps.…”
Section: Manganese‐based Oxidesmentioning
confidence: 99%
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