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Supporting Information

Power Cables for Triboelectric Nanogenerator Networks for

Larger-Scale Blue Energy Harvesting

Guanlin Liu, Longfa Xiao, Chaoyu Chen, Wenlin Liu, Xianjie Pu, Zhiyi Wu, Chenguo Hu*,

Zhong Lin Wang*

Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi

University, Nanning, Guangxi 530004, P.R. China

Department of Applied Physics, State Key Laboratory of Power Transmission

Equipment & System Security and New Technology, Chongqing University, Chongqing

400044, P. R. China

School of Material Science and Engineering, Georgia Institute of Technology, Atlanta,

GA 30332, USA

E-mail: hucg@cqu.edu.cn (CG Hu); zlwang@binn.cas.cn (ZL Wang)

GL Liu and LF Xiao contributed equally to this work.

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Figure S1. Photographs of a) the experimental setup of the transmission wire part, b)

five acrylic holders with different transmission wires as in Figure 2b, and c) three

acrylic holders as in Figure 2c.

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Figure S2. Open-circuit voltage waveforms of the CS mode TENG with six different

transmission wires under four different conditions: in the air before immersion (black),

immersed in tap water (red), immersed in salt water (blue), and in the air after

immersion (pink). a) Enameled copper wires, b) Dupont lines, c) alligator clip lines, d)

silver jacketed wires. Finally, two enameled copper wires through the power cable

with its two steel tapes, staying either e) open-circuit or f) short-circuit.

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Figure S3. Transferred charge quantity waveforms of the CS mode TENG with six

different transmission wires under four different conditions. Graphs correspond to the

same conditions and wire setup as in Figure S2.

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Figure S4. Short-circuit current waveforms of the CS mode TENG with six different

transmission wires under four different conditions. Graphs correspond to the same

conditions and wire setup as in Figure S2.

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Figure S5. Photograph of four transmission wires. From left to right: scraped copper

wires, Dupont lines, alligator clip lines, and silver jacketed wires.

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Figure S6. Short-circuit current waveforms of the CS mode TENG working in

various frequencies with three kinds of copper wires under four different conditions:

in the air before immersion (dark cyan), immersed in tap water (pink), immersed in

salt water (dull red), and in the air after immersion (light cyan). a) Holder #1 with

untreated wires, b) Holder #2 with one scraped wire and c) Holder #3 with both wires

scraped.

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Figure S7. Transferred charge quantity waveforms of the CS mode TENG working in

various frequencies with three kinds of copper wires under four different conditions.

Graphs correspond to the same conditions and wire setup as in Figure S6.

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Figure S8. Open-circuit voltage waveforms of the CS mode TENG working in

various frequencies with three kinds of copper wires under four different conditions.

Graphs correspond to the same conditions and wire setup as in Figure 6.

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Figure S9. Transferred charge quantity waveforms of the CS mode TENG with three

kinds of copper wires under various external resistances. a) Holder #1 in air, b)

Holder #2 immersed in tap water, c) Holder #2 immersed in salt water, d) Holder #3

immersed in tap water and e) Holder #3 immersed in salt water.

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Figure S10. Photographs of the experimental setup for electrical characterization of

the power cable

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Figure S11. Corresponding 2D graphs derived from the color contour graphs in

Figure 5a-b. a-b) Open-circuit voltage and c-d) transferred charge quantity per cycle

of the power cable with tap water under varied amplitude and motion period.

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Figure S12. Corresponding 2D graphs derived from the color contour graphs in

Figure 5c-d. a-b) Open-circuit voltage and c-d) transferred charge quantity per cycle

of the power cable with salt water under varied amplitude and motion period.

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Figure S13. a-c) Open-circuit voltage waveforms and transferred charge quantity

waveforms of the power cable in tap water under various input conditions.

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Figure S14. Dependence of the output power of the power cable in a) tap water or b)

salt water, while in circuit with various resistive loads.

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Figure S15. Photograph of the small TENG array before sealing and waterproofing.