Enhancing the mechanical and electrochemical properties of reduced graphene oxide composites films through the combined actions of chitosan and polypyrrole

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2024-10-18 DOI:10.1016/j.carbon.2024.119715

Jie Zhao , Wenjian Zhang , Guojun Song, Li Li, Yujie Yue, Xiaoran Wang, Min Fang, Feng Jiang, Lichun Ma

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Abstract

With high conductivity, large surface area and a large number of interlayer structures, graphene has become an excellent choice for electrode materials in supercapacitors, but its mechanical strength and electrochemical performance need to be further improved. Herein, chitosan and polypyrrole were introduced into graphene oxide successively by a simple and low-cost method, and then the composite film was reduced by hydroiodic acid, leading to excellent mechanical and electrochemical properties. Structural characterizations verified the existence of covalent bond, π-π interaction and hydrogen bond, effectively improving the poor interface bonding between graphene sheets. The tensile strength and the microhardness of the composite film was increased by 182 % and 3000 % compared with original film. Electrochemical tests showed significantly improvement of the electrochemical activity, and the capacitance value could reach 170 F/g. This composite film with high strength and high electrochemical performance will become a promising candidate material in the field of flexible supercapacitors.

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通过壳聚糖和聚吡咯的联合作用增强还原氧化石墨烯复合薄膜的机械和电化学性能

石墨烯具有导电率高、比表面积大、层间结构多等特点，已成为超级电容器电极材料的最佳选择，但其机械强度和电化学性能有待进一步提高。本文采用简单、低成本的方法将壳聚糖和聚吡咯先后引入氧化石墨烯，然后用氢碘酸还原复合膜，从而获得了优异的机械性能和电化学性能。结构表征验证了共价键、π-π相互作用和氢键的存在，有效改善了石墨烯片之间界面结合力差的问题。与原始薄膜相比，复合薄膜的拉伸强度和显微硬度分别提高了 182% 和 3000%。电化学测试表明，电化学活性明显提高，电容值达到 170 F/g。这种具有高强度和高电化学性能的复合薄膜将成为柔性超级电容器领域一种前景广阔的候选材料。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.