Fig. 3. CVs of the Co/C NPs anode at a scan rate of 0.1 mV s−1 in a potential range of (a) 1.0–1.7 V (vs. Li/Li+) and (b) 0.01–0.5 V (vs. Li/Li+). (c, d) Their corresponding in situ magnetic response at an applied magnetic field of 3 tesla.
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