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SCIENCE CHINA Information Sciences, Volume 61, Issue 6: 060416(2018) https://doi.org/10.1007/s11432-018-9384-7

Optimization of contact-mode triboelectric nanogeneration for high energy conversion efficiency

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  • ReceivedJan 14, 2018
  • AcceptedMar 6, 2018
  • PublishedApr 19, 2018

Abstract

The rapid growth of flexible and wearable electronics makes it an urgent requirement to develop mobile and sustainable energy sources for these devices. Triboelectric nanogenerator (TENG) stands out for its outstanding performance. However, high output performance and energy conversion efficiency TENG still remains one of the most crucial barriers for practical applications. In this paper, we systematically analyze the relationship of maximum instantaneous output power and energy conversion efficiency with the material parameters, structural parameters and experimental parameters. Firstly, we obtain the explicit equations for the transferred charge, output voltage, output current and maximum instantaneous power from the contact-mode model and governing equation. Then it is deeply studied how the material parameters, structure parameters and experimental condition can influence the output performance. Finally, the relationship of energy conversion efficiency with the TENG parameters is investigated to provide guidance for rational design of TENG. The high efficiency energy source could greatly promote the development of flexible electronics.


Acknowledgment

This work was supported by National Basic Research Program of China (973 Program) (Grant No. 2015CB351902), National Key Research and Development Plan (Grant Nos. 2016YFB0400601, 2016YFB0402402), National Natural Science Foundation of China (Grant No. U1431231), Beijing Science and Technology Projects (Grant No. Z151100001615042), Key Research Projects of the Frontier Science of Chinese Academy of Sciences (Grant No. QYZDYSSW-JSC004).


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  • Figure 1

    The contact-mode model of TENG.

  • Figure 2

    (Color online) Calculated output performance of contact-mode TENG. (a) Transferred char relationship at different load resistance; (b) output current-time relationship at different load resistance; (c) output voltage-time relationship at different load resistance; (d) the relationship of peak current, peak voltage and instantaneous output power with load resistance.

  • Figure 3

    (Color online) The relationship of maximum output voltage and current with relevant parameters. (a) The relationship of maximum output voltage and current with $\sigma$; (b) the relationship of maximum output voltage and current with $\varepsilon_r$; (c) the relationship of maximum output voltage and current with $S$; (d) the relationship of maximum output voltage and current with $d$; (e) the relationship of maximum output voltage and current with $x_{\rm~max}$; (f) the relationship of maximum output voltage and current with $v$.

  • Figure 4

    (Color online) The influence of parameters on instantaneous output power and corresponding optimum resistance. (a) Instantaneous output power profile with different load resistance at different $\sigma$; (b) instantaneous output power profile with different load resistance at different $S$; (c) instantaneous output power profile with different load resistance at different $v$; (d) instantaneous output power profile with different load resistance at different $d$.

  • Figure 5

    (Color online) The energy conversion efficiency of TENG. (a) The output current-time relationship at $R$ =protect łinebreak 1 G$\Omega$. (b) The calculated electric energy delivered by the TENG in a single contact. (c) The calculated electric energy and input mechanical energy at different $v$. (d) The relationship of calculated energy conversion efficiency $\eta$ with $\upsilon$.

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