Excellent electrochemical performance based on covalently crosslinked chitosan hydrogel electrolytes induced structural stability against alkali

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2025-02-24 DOI:10.1007/s42114-024-01191-z

Yuchen Wang, Xuan Zhang, Xue Zhao, Xiaodong Yang, Ming Yuan, Yan Zheng, Jijun Tang, Wen Liu, Jiaoxia Zhang, Long Lin

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引用次数: 0

Abstract

Alkali-resistant electrolytes are suitable for high-power equipment and harsh environments. However, most hydrogels lose stability in a strong alkaline environment. As such, the development of hydrogel electrolytes having an outstanding alkali resistance is desirable. In the work reported here, the quaternary ammonium group was introduced to chitosan to achieve excellent hydrophilicity and conductivity. Then, an alkali-resistant hydrogel polymer electrolyte was prepared by graft copolymerizing and crosslinking chitosan quaternary ammonium salt with acrylamide. The fracture elongation of the resulting hydrogel polymer electrolyte can reach 300%. The electrolyte has a high ionic conductivity of 1.66 × 10^–1 S·cm⁻¹ after being soaked in a strong alkaline solution. Meanwhile, salt solutions were used to further enhance the ionic conductivity that reached 2.42 × 10^–1 S·cm⁻¹. The potential window of the device prepared expanded from 1.0 to 1.3 V. The energy density and the power density reached 5.49 Wh·kg⁻¹ and 346.66 W·kg⁻¹, respectively. Finally, it was explored from a molecular level, for the first time, that free ions and solvent-separated ion pairs proceed with ionic migration to enhance ionic conductivity. Our findings provide valuable insights into the application of gel polymer electrolytes in future energy devices.

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.