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. 2017 May 8;8:15194. doi: 10.1038/ncomms15194

Figure 2. Cycling life of Co(OH)2 and design of the XAS experiment.

Figure 2

(a) The synthesized Co(OH)2 shows excellent cyclic stability, and the pseudocapacitance retention reaches 95.7% of its initial value after 8,000 cycles. (b) The design of the reaction cell for in situ XAS experiment. Within the cell, a three-electrode system is utilized, WE, CE and RE stand for working, counter and reference electrodes, respectively. (c) The in situ cyclic voltammetry curve of Co(OH)2 in the reaction cell and the scan rate is 0.4 mV s−1. A–H labels correspond to the sampling points of XAS. (d) Comparison of XANES data collected on as-prepared Co(OH)2 electrode and CoO standard sample.