Figure 3
From: Cationic vacancies as defects in honeycomb lattices with modular symmetries
(a) Current, I–Voltage, V characteristics derived from cyclic voltammetry experiment of the K cation extraction (charging) process with \(\text {K}_{2}\text {Ni}_{2}\text {TeO}_{6}\) as the cathode in a two-electrode setup. K metal was used as the counter electrode and the scanning rate was set to 0.1 mVs\(^{-1}\)80. The current peaks at varied spread-out voltage values reflective of the small activation energy of K cations in the honeycomb layered oxide material. (b) The conductance, \(dI/dV \sim w\sigma\) of \(\text {K}_{2}\text {Ni}_{2}\text {TeO}_{6}\) during the charging process displaying conductance spikes at varied spread-out voltage values corresponding to extractions of a large number of K cations from multiple honeycomb lattice layers, \(k \rightarrow k + w\), where the values of \(w \in {\mathbb {N}} \gg 1\) and \(\sigma\) cannot be separately determined from the results. Nonetheless, the sharp conductance spikes occur evenly distributed at a rough interval of 0.1 V within the voltage interval, 3.2 V to 4.0 V (gray/shaded region)
