Fig. 3. Performance of double output channel in CSA-S-TENG.
a Test schematic of the double output channel. b Simultaneously recorded output charge from channel 1 (red) and channel 2 (purple). c Enlarged output charge curves and corresponding working process of two channels during one sliding cycle. d Voltage curves of charging 10 μF capacitor at 1 Hz using channel 1, channel 2 and both. e Use channel 1 for charging 10 and 100 μF capacitor at 1 Hz individually; inset shows the enlarged step-like charging character. f Matching impendence measurement of CSA-S-TENG.