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A core–shell fiber moisture-driven electric generator enabled by synergetic complex coacervation and built-in potential

Author

Listed:
  • Guangtao Zan

    (Yonsei University)

  • Wei Jiang

    (Yonsei University)

  • HoYeon Kim

    (Yonsei University)

  • Kaiying Zhao

    (Yonsei University)

  • Shengyou Li

    (Yonsei University)

  • Kyuho Lee

    (Yonsei University)

  • Jihye Jang

    (Yonsei University)

  • Gwanho Kim

    (Yonsei University)

  • EunAe Shin

    (Yonsei University
    Korea Institute of Industrial Technology)

  • Woojoong Kim

    (Yonsei University)

  • Jin Woo Oh

    (Yonsei University)

  • Yeonji Kim

    (Yonsei University)

  • Jong Woong Park

    (Yonsei University)

  • Taebin Kim

    (Yonsei University)

  • Seonju Lee

    (Yonsei University)

  • Ji Hye Oh

    (Yonsei University)

  • Jowon Shin

    (Sogang University)

  • Hyeong Jun Kim

    (Sogang University)

  • Cheolmin Park

    (Yonsei University
    Korea Institute of Science and Technology)

Abstract

Moisture-driven electricity generators (MEGs) have been extensively researched; however, high-performance flexible variants have seldom been demonstrated. Here we present a novel complex coacervation with built-in potential strategy for developing a high-performance uniaxial MEG, featuring a core of poly(3,4-ethylenedioxythiophene) (PEDOT) with a built-in charge potential and a gel shell composed of poly(diallyldimethylammonium chloride) (PDDA) and sodium alginate (NaAlg) coacervate. The complex coacervation of two oppositely charged polyelectrolytes produces extra mobile carriers and free volume in the device; meanwhile, the PEDOT core’s surface charge significantly accelerates carrier diffusion. Consequently, the uniaxial fiber-based MEG demonstrates breakthrough performance, achieving an output voltage of up to 0.8 V, a maximum current density of 1.05 mA/cm2, and a power density of 184 μW/cm2 at 20% relative humidity. Moreover, the mechanical robustness is ensured for the PEDOT nanoribbon substrate without performance degradation even after 100,000 folding cycles, making it suitable for self-powered human interactive sensor and synapse. Notably, we have constructed the inaugural MEG-synapse self-powered device, with a fiber-based MEG successfully operating a synaptic memristor, thereby emulating autonomous human synapses linked with fibrous neurons. Overall, this work pioneers innovative design strategies and application scenarios for high-performance MEGs.

Suggested Citation

  • Guangtao Zan & Wei Jiang & HoYeon Kim & Kaiying Zhao & Shengyou Li & Kyuho Lee & Jihye Jang & Gwanho Kim & EunAe Shin & Woojoong Kim & Jin Woo Oh & Yeonji Kim & Jong Woong Park & Taebin Kim & Seonju L, 2024. "A core–shell fiber moisture-driven electric generator enabled by synergetic complex coacervation and built-in potential," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54442-4
    DOI: 10.1038/s41467-024-54442-4
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    1. Wanghuai Xu & Huanxi Zheng & Yuan Liu & Xiaofeng Zhou & Chao Zhang & Yuxin Song & Xu Deng & Michael Leung & Zhengbao Yang & Ronald X. Xu & Zhong Lin Wang & Xiao Cheng Zeng & Zuankai Wang, 2020. "A droplet-based electricity generator with high instantaneous power density," Nature, Nature, vol. 578(7795), pages 392-396, February.
    2. Xiang Shi & Yong Zuo & Peng Zhai & Jiahao Shen & Yangyiwei Yang & Zhen Gao & Meng Liao & Jingxia Wu & Jiawei Wang & Xiaojie Xu & Qi Tong & Bo Zhang & Bingjie Wang & Xuemei Sun & Lihua Zhang & Qibing P, 2021. "Large-area display textiles integrated with functional systems," Nature, Nature, vol. 591(7849), pages 240-245, March.
    3. Xiaomeng Liu & Hongyan Gao & Joy E. Ward & Xiaorong Liu & Bing Yin & Tianda Fu & Jianhan Chen & Derek R. Lovley & Jun Yao, 2020. "Power generation from ambient humidity using protein nanowires," Nature, Nature, vol. 578(7796), pages 550-554, February.
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