In-situ compression and electrochemical studies of graphene foam

Veruscript Functional Nanomaterials

Sakineh Chabi¹ 

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DOI  :  10.22261/FNAN.UMPBGN

学科分类：电子与电气工程

来源: Veruscript

【 摘 要 】

This study describes the correlation between structural, mechanical and electrochemical properties of graphene foam (GF) and focuses on the effects of 3D structure on the cycle life of graphene composite electrodes. The mechanical properties of the foam were assessed under in-situ compression tests within a scanning electron microscope. The foam showed a significant recovery after subjecting it to a compression strain exceeding 70%. The mechanical integrity and recoverability of the GF is related to its structural features, such as hollow struts, large size of the graphene sheets and low level of defects, all enabled the elastic deformation under compression loading. The advantage of the high flexibility and elasticity of these GFs was further explored and validated by using them as substrates for making composite materials for supercapacitor electrodes. Our findings indicated that the produced 3D GF-based composite have excellent cycle life and they do not show any capacity fading after thousands cycles of cyclic voltammetry test. This excellent performance is due to their ability to accommodate the cyclic strains during repeated charge-discharge cycles.

【 授权许可】

CC BY