Recent progress in graphene‐based electrodes for flexible batteries

Abstract

The emerging flexible electronic devices have stimulated the development of flexible batteries, in which flexible electrodes are indispensable components. Graphene, known for its excellent electrical conductivity and mechanical stability, can be used as an ideal flexible substrate. Recently, many efforts have been devoted to graphene-based electrodes for flexible batteries. Herein, this review summarizes recent advances in the development of graphene-based electrodes for various flexible batteries, including metal-ion batteries (ions of Li, Na, Zn, Al, etc.), lithiumsulfur batteries, and metal-air batteries (Li-and Zn-air batteries). Besides, major challenges and future developments of flexible batteries are also discussed. K E Y W O R D S flexible batteries, flexible electrodes, graphene

Recent advances in organic‐based materials for resistive memory applications

“…Graphene is an elemental carbon allotrope with sp 2 configuration of a honeycomb crystal lattice in a single‐layer sheet, and it is regarded as the first member of 2D materials family. Since its discovery, graphene has undergone a rapid development and shown broad prospects in a variety of fields including batteries, sensors, field‐effect transistors, and optoelectronic devices 142‐150 . Notably, graphene‐based materials have also demonstrated as promising alternatives for resistive memory applications, thanks to its easy solution‐processing features, outstanding physical and chemical adjustability, 3D stacking capability, and possibility of obtaining heterostructures 51,151‐167 .…”

Structure Design and Composition Engineering of Carbon‐Based Nanomaterials for Lithium Energy Storage

“…Although the preparation of pure graphene has made some progress, commercialization of pure graphene electrodes is still a long way to go. A large fraction of lithium are irreversibly consumed during the first lithiation step when graphene as an anode, leading to a quite low Coulombic efficiency . After several cycles, graphene layer restacking occurs, lowering the storage capacity.…”

“…Graphene‐based composites inherit the flexibility and high conductivity of graphene, which can offer good tolerance to the volume expansions and enhance electrical preservation. Currently, many efforts have been made to develop graphene‐based composites electrodes including the addition of electroactive materials to provide reversible alloying, insertion and conversion reactions with Li + . The additive active materials effectively inhibit the restacking of graphene layers.…”

“…A large fraction of lithium are irreversibly consumed during the first lithiation step when graphene as an anode, leading to a quite low Coulombic efficiency. [116] After several cycles, graphene layer restacking occurs, lowering the storage capacity. In most practical applications, issues with the high cost and poor Coulombic efficiency of graphene-based anodes are still pendent.…”

“…Currently, many efforts have been made to develop graphene-based composites electrodes including the addition of electroactive materials to provide reversible alloying, insertion and conversion reactions with Li + . [116,120] The additive active materials effectively inhibit the restacking of graphene layers. On the other hand, the large surface area, high intrinsic conductivity, and favorable mechanical flexibility of graphene also promote the electrons transmission and alleviate volume expansions of active materials, generating a high reversible capacity.…”