2016
DOI: 10.1038/ncomms13374
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The influence of large cations on the electrochemical properties of tunnel-structured metal oxides

Abstract: Metal oxides with a tunnelled structure are attractive as charge storage materials for rechargeable batteries and supercapacitors, since the tunnels enable fast reversible insertion/extraction of charge carriers (for example, lithium ions). Common synthesis methods can introduce large cations such as potassium, barium and ammonium ions into the tunnels, but how these cations affect charge storage performance is not fully understood. Here, we report the role of tunnel cations in governing the electrochemical pr… Show more

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Cited by 200 publications
(169 citation statements)
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References 49 publications
(71 reference statements)
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“…These results match well with electrochemical data reported 15 in Ref. [43] for samples prepared by wet-chemical methods. From the second cycle to the 5 th cycle, the discharge capacity of the J-MnO 2 sample increases from 135 mAh g -1 to…”
Section: Electrochemical Testssupporting
confidence: 82%
“…These results match well with electrochemical data reported 15 in Ref. [43] for samples prepared by wet-chemical methods. From the second cycle to the 5 th cycle, the discharge capacity of the J-MnO 2 sample increases from 135 mAh g -1 to…”
Section: Electrochemical Testssupporting
confidence: 82%
“…The mineral of birnessite is a layered manganese oxide formed by the alternating stacking of hydrolyzable cations and MnO 6 octahedrons. [28] We synthesized a series of K-Birnessite (K x MnO 2 ·nH 2 O) samples using a facile high-temperature solidstate reaction, whose XRD patterns are shown in Figure S1 of the Supporting Information.…”
Section: Structure Of K-birnessitementioning
confidence: 99%
“…

kind of secondary batteries will find promising applications in large-scale energy storage. [6] Then compared with Na-ion battery (NIB), a huge advantage lies in the application of graphite anode for KIB, [7] which is not feasible for Na + insertion into the graphite. The fast K + ion diffusion property provides the possibility of saving the charging time of KIBs as the next generation energy storage and transport devices.

…”
mentioning
confidence: 99%
“…Such DFT techniques have been applied to other battery materials 29,42,57,59 including Li-ion silicate cathodes.…”
mentioning
confidence: 99%
“…Computer simulations have been used to investigate a range of materials for lithium and sodium batteries. 40,42,[56][57][58][59] Density functional theory (DFT) calculations were performed using a plane wave basis set implemented in the VASP code.…”
mentioning
confidence: 99%