Highly Crystalline Graphene Fibers with Superior Strength and Conductivities by Plasticization Spinning. (20th September 2020)

• Record Type: Journal Article
• Authors: Li, Peng; Liu, Yingjun; Shi, Shaoyi; Xu, Zhen; Ma, Weigang; Wang, Ziqiu; Liu, Senping; Gao, Chao
• Is Part Of: Advanced functional materials. Volume 30:Number 52(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-09-20
• Subjects: crystalline fibers -- graphene fibers -- plastic state -- plasticization spinning; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202006584
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Graphene fiber (GF), a macroscopic one‐dimensional assembly of individual graphene sheets, promises both extraordinary mechanical performance and superior multifunctionality. However, the properties of graphene fiber are still limited due to the unfavorable crystalline structures, especially induced by wrinkled conformations of graphene. A plasticization spinning strategy is presented to achieve GF with both high mechanical strength and electrical/thermal conductivity. Adjusting the interlayer space from 1.2 to 1.8 nm by intercalating proper plasticizers to adjacent graphene oxide sheets enables graphene oxide fibers to achieve a 580% enhanced deformable plasticity. Such a plasticization spinning flattens random graphene wrinkles, and regulates sheets with high order and stacking density, thereby forming large crystallite domains. The GF exhibits all around record performance including mechanical strength (3.4 GPa), electrical conductivity (1.19 × 10 6 S m −1 ), and thermal conductivity (1480 W m −1 K −1 ). The optimally crystalline GF with the integration of benchmark overall properties and scalable fabrication is likely to be attractive and competitive in future industrial applications. Abstract : A plasticization spinning strategy is presented to achieve graphene fibers (GFs) with both high mechanical strength and electrical/thermal conductivity. The crystalline graphene fiber with high stacking order and giant graphitic crystallites shows record integration of mechanical and functional properties.