Reduced graphene oxide as a multi-functional conductive binder for supercapacitor electrodes

A Flexible Si@C Electrode with Excellent Stability Employing an MXene as a Multifunctional Binder for Lithium‐Ion Batteries

“…Both CMC‐ and PVDF‐bonded Si@C films (coating layers on Cu foil) show type II N 2 adsorption/desorption isotherms characteristic of a mesoporous structure, which results from the spaces between the Si@C nanoparticles, but their pore volumes are limited. Notably, compared with pristine Si@C, the CMC‐ and PVDF‐bonded Si@C electrodes show extremely diminished porosities, especially for pores smaller than 10 nm, which are attributed to the pore‐blocking effect of PVDF/CMC . In contrast, the MXene‐bonded Si@C film shows a much more developed porous structure than the CMC‐ and PVDF‐bonded electrodes.…”

“…[a] P. Zhang MXenesc an combine with variousn anomaterials (e.g.,c arbon nanotubes, [26][27][28] polymers, [29] and graphene) [30,31] as conductive substrates to fabricate free-standing composite films by vacuum filtration for application in energy-storage devices such as LIBs, [31,32] supercapacitors, [26,30] and lithium-sulfurb atteries. [33,34] In this regard, we have reported several free-standing electrodes based on 2D Ti 3 C 2 T x MXene or graphene as conductive binder,i ncluding activated carbon electrodes for supercapacitors, [35,36] ah ard carbon anode for sodium-ion batteries, [37] and a sulfur cathode for Li-S batteries, [38] which have superior flexibility and remarkably improved performance comparedw ith electrodes containing conventional polymerb inders. Because the MXene-bonded flexible electrodes also show loose architectures, they are expected to buffer volumec hanges of the active materials (e.g.,s ilicon,p hosphorus,a nd transition-metal oxides).…”

Excellent Rate and Low Temperature Performance of Lithium‐Ion Batteries based on Binder‐Free Li4Ti5O12 Electrode

“…[9,[25][26][27] The negative effect is that the surface of active material will be covered by the insulating binder and result in decreasing contact area between active materials and electrolyte. [25,28] In addition, it will also increase the diffusion distance of Li + in nano active material (Scheme 1a). Thus, binder-free electrodes have been widely studied to avoid the disadvantages of conventional binders.…”

“…Binder-free electrodes generally include the following types: firstly, one is in-situ fabricated with carbon-based materials, such as reduced graphene oxide (rGO) and carbon fiber. [28,29] Secondly, some binder-free electrodes still rely on substrates, including metal substrate, carbon nanotubes, carbon paper or other flexible materials. [30][31][32][33] Thirdly, templates, spark plasma sintering approach and powder extrusion moulding technology can be helpful to obtain the monolithic or ceramic electrodes without binders.…”

Engineering Graphenes from the Nano- to the Macroscale for Electrochemical Energy Storage

“…Theoretical and experimental studies on the newly emerging nanocarbons, such as fullerenes and carbon nanotubes, for EES have been carried out for decades [5][6][7][8], and in recent years graphene, the simplest carbon material, has attracted more interest because of its excellent electronic, thermal, and mechanical properties, and larger open surface area, which are key factors for evaluating an electrochemically active material [9]. Moreover, graphene is the basic unit and building block for all sp 2 carbon materials and shows great potential in EES devices not only as an electrode material, but also as a conductive network and electrochemical reaction framework for the loading of active materials [10][11][12]. However, there are many limitations in the real applications of graphene in EES since its properties are largely influenced by the organization of the sheets in the meso-and macroscales.…”