ex situ XPS of Zn 2p, O 1s, and Cu 2p
fully discharged Cu3(HHTP)2 electrode · Electrode
Samples at pristine, 0.8 V, first fully discharged, 1.15 V, first fully charged, and 500th fully charged states; cells opened/rinsed in glove-box and dried under vacuum for 1 h before XPS.
| Property | Reported value | Normalised value | Uncertainty | Origin and quality | Source |
|---|---|---|---|---|---|
| electrons accepted per Cu3(HHTP)2 | 2.3 electrons | — | — | Calculated From Reported Rounded Reported | rendered page 6 / article p.6 · Electronic states analysis during discharge-charge · Figure 1c |
| additional capacity from Cu2+ redox | 39 mAh g^-1; equivalent to 0.3 electrons | — | — | Calculated From Reported Rounded Reported | SI p.10 · Supplementary Note 2 |
| O 1s benzoid peak binding energy | 533 eV | — | — | Text Rounded Reported | rendered page 4 / article p.4 · Electronic states analysis during discharge-charge · Figure 4b |
| O 1s quinoid peak binding energy | 532 eV | — | — | Text Rounded Reported | rendered page 4 / article p.4 · Electronic states analysis during discharge-charge · Figure 4b |
| overall Zn-Cu3(HHTP)2 battery reaction | Cu3(HHTP)2 + 3.45Zn2+ + 6.9e- -> Zn3.45[Cu3(HHTP)2] | — | — | Text Exact Reported | SI p.10 · Supplementary Note 2 |
| theoretical capacity from quinoid redox | 197 mAh g^-1 | — | — | Calculated From Reported Rounded Reported | rendered page 6 / article p.6 · Electronic states analysis during discharge-charge |
| Cu 2p evidence for Cu2+/Cu+ redox | Cu2+ satellite peaks disappear and Cu 2p peaks shift to lower binding energy after first plateau | — | — | Text Qualitative | rendered page 6 / article p.6 · Electronic states analysis during discharge-charge · Figure 4c |
| Zn 2p reversible insertion/extraction | Zn 2p peaks appear in discharged state and disappear in charged state | — | — | Text Qualitative | rendered page 4 / article p.4 · Electronic states analysis during discharge-charge · Figure 4a; Supplementary Fig. 10 |