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. 2016 May 12;6:25809. doi: 10.1038/srep25809

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(a) The CV curves of NVP cathode in different cycle with scan speed of 0.1 mV s⁻¹; (b) The first 20 cycles of charge/discharge of NVP/Zn battery at 0.2C; (c,d) Initial charge/discharge profile at 0.1C, and the corresponding ex-XRD patterns of NVP cathode during charge/discharge process.