Fig. 4: The mechanism analyses of V2O5@rGO-1.5 based ZTCCs. | Nature Communications

Fig. 4: The mechanism analyses of V2O5@rGO-1.5 based ZTCCs.

From: Enabling giant thermopower by heterostructure engineering of hydrated vanadium pentoxide for zinc ion thermal charging cells

Fig. 4

a The voltage change curves at different processes. b, c The corresponding ex-situ XRD patterns of V2O5@rGO-1.5 cathode during b thermal charging states at various temperature differences and c electrochemically charging/discharging states at 30 K. d–f The corresponding ex-situ XPS spectra of d Zn 2p, e V 2p, and f O 1 s.

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