Figure 4: The electrochemical characteristics.
From: Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

(a) The cycling properties for the coin cells with the cathodes made by 0 and 1.8 wt% graphene flakes on silica particles. Charge/discharge rate: 23 mA g−1. (b) The cyclic voltammetry characteristics for these two cells. The curve for silica was collected at a rate of 0.02 V s−1.