Fabricating of high-performance functional graphene fibers for micro-capacitive energy storage

Tianju Fan, Chunyan Zhao, Zhuangqing Xiao, Fangjun Guo, Kaiyu Cai, Hai Lin, Yidong Liu, Hong Meng, Yong Min, Arthur J. Epstein

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Although graphene is a typical two dimensional materials, it has converted to multi-dimensional materials with many unique properties. As an example, the one dimensional graphene fiber is fabricated by utilizing ionic liquid as coagulation and functional diamines as cross-linkers to connect graphene oxide layers. The fibers show excellent mechanical properties and superior electrical performance. The tensile strength of the resultant fibers reaches ∼729 MPa after a super high temperature thermal annealing treatment at 2800 °C. Additionally, quasi-solid-state flexible micro-capacitors are fabricated with promising result on energy storage. The device show a specific volumetric capacity as high as ∼225 F/cm 3 (measured at 103.5 mA cm '3 in a three-electrode cell), as well as a long cycle life of 2000 times. The initial results indicate that these fibers will be a good candidate to replace energy storage devices for miniaturized portable electronic applications.

Original languageEnglish
Article number29534
JournalScientific Reports
Volume6
DOIs
StatePublished - 8 Jul 2016
Externally publishedYes

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