Fig. 1: Design strategy of anion-enrichment interface.
From: Stable zinc anode solid electrolyte interphase via inner Helmholtz plane engineering
a Schematic illustration of anion receptors β-CD enabled β-CD@OTf--rich IHP and thus-derived SEI. b Electrode/electrolyte interface consist of inner Helmholtz plane (IHP), outer Helmholtz plane (OHP), and diffusion layer. c Binding energy comparison of OTf- anions with varied CD molecules. d Raman spectra of pure Zn(OTf)2, β-CD and β-CD@OTf- complex. e Schematic snapshots of simulated interfacial structures in β-CD-Zn(OTf)2 electrolyte without applied charge (0 µC cm−2). f LSV curves on Ti electrode at the scan rate of 5 mV s−1. The inset is DFT calculations on the HOMO and LUMO level of bare OTf- anion and β-CD@OTf-. g The corresponding number density profiles along the vertical graphene surface under condition of 0 µC cm−2 in Zn(OTf)2 and β-CD-Zn(OTf)2, respectively. h The partial enlarged snapshot of Fig. 1e suggesting β-CD accommodate OTf- anions.
