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High-performance cryo-temperature ionic thermoelectric liquid cell developed through a eutectic solvent strategy

Author

Listed:
  • Shuaihua Wang

    (Southern University of Science and Technology)

  • Yuchen Li

    (Southern University of Science and Technology)

  • Mao Yu

    (Southern University of Science and Technology)

  • Qikai Li

    (Southern University of Science and Technology)

  • Huan Li

    (Southern University of Science and Technology)

  • Yupeng Wang

    (Southern University of Science and Technology)

  • Jiajia Zhang

    (Southern University of Science and Technology)

  • Kang Zhu

    (Southern University of Science and Technology)

  • Weishu Liu

    (Southern University of Science and Technology)

Abstract

Ionic thermoelectric (i-TE) liquid cells offer an environmentally friendly, cost effective, and easy-operation route to low-grade heat recovery. However, the lowest temperature is limited by the freezing temperature of the aqueous electrolyte. Applying a eutectic solvent strategy, we fabricate a high-performance cryo-temperature i-TE liquid cell. Formamide is used as a chaotic organic solvent that destroys the hydrogen bond network between water molecules, forming a deep eutectic solvent that enables the cell to operate near cryo temperatures (down to –35 °C). After synergistic optimization of the electrode and cell structure, the as-fabricated liquid i-TE cell with cold (–35 °C) and hot (70 °C) ends achieve a high power density (17.5 W m−2) and a large two-hour energy density (27 kJ m−2). In a prototype 25-cell module, the open-circuit voltage and short-circuit current are 6.9 V and 68 mA, respectively, and the maximum power is 131 mW. The anti-freezing ability and high output performance of the as-fabricated i-TE liquid cell system are requisites for applications in frigid regions.

Suggested Citation

  • Shuaihua Wang & Yuchen Li & Mao Yu & Qikai Li & Huan Li & Yupeng Wang & Jiajia Zhang & Kang Zhu & Weishu Liu, 2024. "High-performance cryo-temperature ionic thermoelectric liquid cell developed through a eutectic solvent strategy," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45432-7
    DOI: 10.1038/s41467-024-45432-7
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    References listed on IDEAS

    as
    1. Masakazu Matsumoto & Shinji Saito & Iwao Ohmine, 2002. "Molecular dynamics simulation of the ice nucleation and growth process leading to water freezing," Nature, Nature, vol. 416(6879), pages 409-413, March.
    2. Jiangjiang Duan & Guang Feng & Boyang Yu & Jia Li & Ming Chen & Peihua Yang & Jiamao Feng & Kang Liu & Jun Zhou, 2018. "Aqueous thermogalvanic cells with a high Seebeck coefficient for low-grade heat harvest," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
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    1. Jinpei Wang & Yuxin Song & Fanfei Yu & Yijun Zeng & Chenyang Wu & Xuezhi Qin & Liang Peng & Yitan Li & Yongsen Zhou & Ran Tao & Hangchen Liu & Hong Zhu & Ming Sun & Wanghuai Xu & Chao Zhang & Zuankai , 2024. "Ultrastrong, flexible thermogalvanic armor with a Carnot-relative efficiency over 8%," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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