Figure 3 | Scientific Reports

Figure 3

From: Nanotube-structured Na2V3O7 as a Cathode Material for Sodium-Ion Batteries with High-rate and Stable Cycle Performances

Figure 3

(a) The 1st charge/discharge curves of a SIB using the Na2V3O7 electrode at a current density of 0.1C at 30 °C. The rate performance of the cell is shown in panel (b), whose capacity retention at 1C (against initial capacity at each lowest C-rate) is compared with those of other representative cathodes for SIBs11,12,13,15,16,17,18 in panel (c). The cycle performance of the cell at a current density of 1C is shown in panel (d). Capacity degradation rate per cycle is compared with those of other representative cathodes for SIBs11,12,15,16,17,19,20 in panel (e). Numbers in the circle brackets indicate the cycle number to assess the degradation rate. The galvanostatic intermittent titration technique (GITT) curve of the cell is shown in panel (f).

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