Fig. 3 | Nature Communications

Fig. 3

From: Highly nitrogen doped carbon nanofibers with superior rate capability and cyclability for potassium ion batteries

Fig. 3

Electrochemical performance of NCNFs as PIB anodes in half cells. a CV curves of NCNF-650. b First charge and second discharge profiles of NCNFs. c Cycling performance of NCNFs at a current density of 25 mA g–1. d Rate performance of NCNFs with rates ranging from 0.05 to 20 A g–1. Long-term cycling performance of NCNF-650 at high rates of 0.5 (e), 1 (f), and 2 A g–1 (g)

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