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. 2015 Oct 14;5:15173. doi: 10.1038/srep15173

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(a) Discharge curves for GO battery with different lengths at RH 70%. The discharge current is 1 μA. Inset picture shows the full discharge curve of GO battery with 2 * 10 cm length. (b) The first and second discharge at 1 μA and inset picture shows the first charge at 100 μA for GO battery with 2 * 10 cm length at RH 70%. (c) Discharge curve of GO batteries printed in series on PEN substrate at ambient environment. The discharge current is 1 μA at ambient environment.