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Supporting Information

Enhancing performance of triboelectric nanogenerator by

filling high dielectric nanoparticles into sponge PDMS film

Jie Chen,1 Hengyu Guo,

1* Xianming He,

1 Guanlin Liu,

1 Yi Xi,

1 Haofei Shi,

2 Chenguo Hu

1 *

1Department of Applied Physics, Chongqing University, Chongqing 400044, PR China.

2Chongqing Engineering Research Center of Graphene Film Manufacturing, Chongqing

401329, P. R. China

*Correspondence to: hucg@cqu.edu.cn (CG Hu); cquphysicsghy@gmail.com (HY Guo)

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Figure S1. Schematic diagram of the experiment setup and measurement system for

testing the output performance of the CS-TENG.

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Figure S2. Morphology characterization of the fillings. (a)-(d) SEM images of

SiO2/TiO2/BaTiO3/SrTiO3 nanoparticles, respectively. The scale bar in (a) is 50 µm

and in (b)-(d) is 500 nm.

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Figure S3. The optical characters of the composite film. (a)-(d) The light

transmittance of SiO2/TiO2/BaTiO3/SrTiO3 filling PDMS films with the filling

volume ratio of 1%, 2%, 3%, 5%, 8%, 10%, 15%, 20% and 25%, from top to bottom,

respectively. The insets are the digital photographs corresponding different filling

volume ratios.

SiO2@PDMS TiO2@PDMS

BaTiO3@PDMS SrTiO3@PDMS

1% 2% 3% 5% 8% 10% 15% 20% 25%

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Figure S4. Electrical measurements of each as-fabricated composite film based

TENG (f =2.5 Hz). (a)-(d) Open-circuit voltage responses of the composite PDMS

thin films with the filling volume ratio from 0% to 25%.

SrTiO3@PDMS BaTiO3@PDMS

TiO2@PDMS SiO2@PDMS

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Figure S5. Electrical measurements of each as-fabricated composite film based

TENG (f =2.5 Hz). (a)-(d) Short-current density of the composite PDMS films with

the volume ratio from 0% to 25%, respectively.

SrTiO3@PDMS BaTiO3@PDMS

TiO2@PDMS SiO2@PDMS

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Figure S6. (a) The light transmittance of the sponge PDMS films. (b) Open-circuit

voltage, (c) current density of sponge PDMS films prepared from the mixtures with

NaCl volume ratio from 0% to 45%.

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Table S1. The thickness of each sponge PDMS films, including standard deviations.

Volume ratio 1% 2% 3% 5% 8% 10% 15%

Thickness (mm) 0.45±0.02 0.49±0.01 0.44±0.05 0.46±0.04 0.48±0.01 0.46±0.04 0.50±0.03

Volume ratio 20% 25% 30% 35% 40% 45% 50%

Thickness (mm) 0.50±0.02 0.50±0.05 0.51±0.06 0.50±0.03 0.48±0.03 0.46±0.03 0.47±0.02