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Extended Data Fig. 1 | The in situ NMR probe setups and pulse sequence. a, Image of the f low-through (on-line) sampling tube po ...
Article Extended Data Fig. 2 | The in situ pseudo-2D and stacked^1 H NMR spectra versus battery voltage and current. a, Operando ...
Extended Data Fig. 3 | EPR spectra of DHAQ3•− radical anions. a–d, Spectra of 100 mM (a) and 1 mM (b–d) DHAQ solution reduced to ...
Article Extended Data Fig. 4 | CV and concentration of radical anions. a, CV of 5 mM DHAQ and 5 mM DBEAQ in D 2 O with 1 M KOH. ...
Extended Data Fig. 5 | On-line^1 H NMR spectra and battery electrochemical profile during galvanostatic cycling. a, 20 cm^3 of 1 ...
Article Extended Data Fig. 6 | Variable-temperature NMR of DHAQ2−/DHAQ3•− radical anion solution. a, Variable-temperature NMR sp ...
Extended Data Fig. 7 | On-line^1 H NMR spectra performed to quantify the electron-transfer rates. a–d, 30 mM (a), 50 mM (b), 100 ...
Article Extended Data Fig. 8 | NMR and DFT calculations to identify the decomposition products. a–c, DOSY (a), COSY (b) and hete ...
Extended Data Fig. 9 | In situ^1 H NMR study of the decomposition reaction under different cycling conditions. a, b, Proposed H– ...
Article Extended Data Fig. 10 | Effect of radicals and f low on longitudinal and transverse relaxation. a, The voltage profile d ...
Nature | Vol 579 | 12 March 2020 | 229 Article Limits on gas impermeability of graphene P. Z. Sun1,2, Q. Yang1,2, W. J. Kuang^1 ...
230 | Nature | Vol 579 | 12 March 2020 Article were permeable to it, the partial pressures inside and outside should equalize so ...
Nature | Vol 579 | 12 March 2020 | 231 we obtain E ≥ 1.2 eV, where the pre-exponential factor describes the incident rate of hel ...
232 | Nature | Vol 579 | 12 March 2020 Article (Extended Data Fig. 7). Another fact is that monolayer graphene is known to be hi ...
Methods Device fabrication Our devices were fabricated as shown schematically in Extended Data Fig. 1a. A monocrystal of either ...
Article second and third terms of equation ( 5 ) should not exceed 20% of the linear term’s value. Therefore, for the purpose of ...
Isotope effect The proposed mechanism of hydrogen permeation involves several steps: dissociation of molecular hydrogen on graph ...
Article Extended Data Fig. 1 | Device fabrication. a, Graphite or hBN monocrystals are obtained by mechanical exfoliation. Micro ...
Extended Data Fig. 2 | Electron micrographs of our microcontainers. a, A microcontainer with d = 0.5 μm. Such images were taken ...
Article Extended Data Fig. 3 | Stability of graphene membranes in air and helium. a, Changes in δ(0) measured for two containers ...
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