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首页> 外文期刊>Advanced Functional Materials >Flexible Supercapacitor Based on Organohydrogel Electrolyte with Long-Term Anti-Freezing and Anti-Drying Property
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Flexible Supercapacitor Based on Organohydrogel Electrolyte with Long-Term Anti-Freezing and Anti-Drying Property

机译：基于有机氢凝胶电解质的柔性超级电容器，具有长期防冻和抗干燥性能

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摘要

Hydrogel electrolytes have spurred the development of flexible energy storage devices by endowing them with liquid-like ion transport and solid-like mechanical elasticity. However, traditional hydrogel electrolytes always lose these functions in climate change because the internal water undergoes freezing and/or dehydration. In this work, a flexible supercapacitor (OHEC) is assembled based on the organohydrogel electrolyte (OHE) and activated carbon electrode material. The OHE is composed of PAMPS/PAAm double-network hydrogel soaked from 4mLiCl/ethylene glycol and exhibits good conductivities (1.9 and 22.9 mS cm(-1)at -20 and 25 degrees C, respectively). The OHEC exhibits broad temperature adaptability (from -20 to 80 degrees C) and extraordinary resistance to mechanical damage (above 100 kg crushing). The OHEC avoids the polarization at low temperatures and retains 77.8% capacitance retention after storage at -20 degrees C for 30 days. Without extra sealed packaging, the OHEC maintains remarkable cycling stability (only 8.7% capacitance decay after 10 000 cycles) and retains 77.3% capacitance at 80 degrees C after 56 h. The outstanding anti-drying performance and improved interfacial compatibility of OHEC account for the good durability in the high-temperature environments. Additionally, other salts (such as LiClO4, NaCl, and KCl) with favorable solubility in ethylene glycol can also serve in OHEs for wide temperature range supercapacitors.
机译：水凝胶电解质通过赋予它们具有液体状离子传输和固体状机械弹性而施加了柔性能量存储装置的开发。然而，传统的水凝胶电解质总是失去气候变化中的这些功能，因为内部水经历了冷冻和/或脱水。在这项工作中，基于有机氢凝胶电解质（OHE）和活性炭电极材料来组装柔性超级电容器（OCEC）。 OHE由浸泡的泵/ paam双网络水凝胶组成，浸泡在4mliCl /乙二醇中，并且分别在-20和25℃下表现出良好的导电性（1.9和22.9ms（-1））。 OHEC表现出广泛的温度适应性（从-20到80℃）和对机械损伤的非凡抵抗力（高于100kg压碎）。 OCEC避免在低温下的偏振，并在-20℃下储存30天后保留77.8％的电容保留。在没有额外的密封包装的情况下，OCEC保持着显着的循环稳定性（10 000个循环后仅8.7％的电容衰减），并在56小时后在80℃下保持77.3％的电容。出色的抗干性能和OHEC界面兼容性的改善算法在高温环境中的良好耐用性。另外，在乙二醇中具有良好溶解度的其他盐（例如LiClO4，NaCl和KCl）也可以用于宽温度范围超级电容器的沸点。

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  • 来源
    《Advanced Functional Materials》 |2020年第52期|2007291.1-2007291.12|共12页
  • 作者

    Li Xilong; Lou Dongyang; Wang Hongyang; Sun Xiaoyi; Li Juan; Liu You-Nian;

  • 作者单位

    Cent South Univ Coll Chem & Chem Engn Hunan Prov Key Lab Micro & Nano Mat Interface Sci Changsha 410083 Hunan Peoples R China;

    Cent South Univ Coll Chem & Chem Engn Hunan Prov Key Lab Micro & Nano Mat Interface Sci Changsha 410083 Hunan Peoples R China;

    Cent South Univ Coll Chem & Chem Engn Hunan Prov Key Lab Micro & Nano Mat Interface Sci Changsha 410083 Hunan Peoples R China;

    Cent South Univ Coll Chem & Chem Engn Hunan Prov Key Lab Micro & Nano Mat Interface Sci Changsha 410083 Hunan Peoples R China;

    Cent South Univ Coll Chem & Chem Engn Hunan Prov Key Lab Micro & Nano Mat Interface Sci Changsha 410083 Hunan Peoples R China;

    Cent South Univ Coll Chem & Chem Engn Hunan Prov Key Lab Micro & Nano Mat Interface Sci Changsha 410083 Hunan Peoples R China;

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  • 正文语种 eng
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  • 关键词

    flexibility; high-temperature performance; low-temperature tolerance; organohydrogel electrolytes; supercapacitors;

    机译：灵活性;高温性能;低温耐受性;有机氢凝胶电解质;超级电容器;

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