Multi-layer Ti3C2Tx-nanoparticles (MXenes) as solid lubricants – Role of surface terminations and intercalated water

Rosenkranz, Andreas; Grützmacher, Philipp G.; Espinoza, Rodrigo; Fuenzalida, V.M.; Blanco, Élodie; Escalona, N.; Marco‐Gracia, Francisco J.; Villarroel, Roberto; Guo, Liangchao; Kang, Ruiyang; Mücklich, Frank; Súarez, Sebastián; Zhang, Zhenyu

doi:10.1016/j.apsusc.2019.07.171

Cited by 127 publications

(58 citation statements)

References 41 publications

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“…[115] Drop-cast MXene coatings on stainless steel demonstrated a similar 3.5fold friction reduction and pronounced changes in the underlying wear mechanisms under very dry conditions (relative humidity of 4%). [116] Recently, the friction and wear response of drop-cast MXene coatings were studied as functions of relative humidity and contact pressure. [117] For high contact pressures of 0.80 GPa and low relative humidity of 20%, MXene coatings induced a 2.3-fold friction reduction and a 2.7-fold wear volume reduction due to the formation of self-lubricating tribofilms of compacted MXenes.…”

Section: Tribological Behavior Of Mxenesmentioning

confidence: 99%

2D MXenes: Tunable Mechanical and Tribological Properties

2021

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carbon/nitrogen (X) with bonded terminations (T x : -O 2 , -F 2 , -(OH) 2 , -Cl 2 , or their combinations) on the exterior transition metal surfaces. [6][7][8] MXenes' crystal structures and chemical formula are derived from their 3D crystalline precursors, which are usually MAX phases. [9] MAX phases are chemically denoted by M n+1 AX n (n = 1 to 4), for which the M-X layers found in MXenes are sandwiched by layers of A-group elements (mostly group 13-16 of the periodic table). [10] MXenes are synthesized by selectively removing/ etching these A-group element layers. Upon the removal of these A layers, surface terminations (T x ) occupy the bonding sites on M layers previously bonded to the A-group elements. [11] MXenes are excellent candidates for a range of applications (Figure 1a), including energy storage, [7] transparent electronics, [12,13] sensors, [14] electromagnetic interference (EMI) shielding, [15,16] and catalysis. [17] These applications involve MXenes as flexible and thin films, [13] MXenes as anchors in hybrid materials, [18] embedded in matrix materials, [19,20] or even as wearable fabrics. [21] In almost all these applications, fundamental understanding of the mechanical and tribological properties of MXenes is necessary (Figure 1b). The mechanical properties are vital to MXenes' applications in energy storage and catalysis, as MXenes in electrodes can act as active materials, conductive additives, strong binders, and current collectors, which can control the structure of the electrode and withstand expansion and contraction during charge and discharge cycles. [7,22] Additionally, the rise of flexible and wearable devices [13,21,23] necessitates mechanical characterization of MXene to withstand the required mechanical forces while maintaining the flexibility for these applications. Similarly, the potential applications of MXenes in triboelectric nanogenerators for energy storage and wearable electronics requires the characterization of MXenes' tribological properties. [24] More recently, MXenes have been used as reinforcement phases in composite materials. [25] The relevance of the mechanical and tribological properties in various applications is illustrated in Figure 1b. The rationale and support for this figure is summarized in Figures S1 and S2, Supporting Information, and discussed further in the Supporting Information.Despite well over 3000 publications to date on MXenes since their discovery, [26] only 4.9% of publications have studied their mechanical and tribological properties and their applications as reinforcement materials in composites, as shown in Figure 1a. Only two experimental studies on the mechanical stiffness 2D transition metal carbides, nitrides, and carbonitrides, known as MXenes, were discovered in 2011 and have grown to prominence in energy storage, catalysis, electromagnetic interference shielding, wireless communications, electronic, sensors, and environmental and biomedical applications. In addition to their high electrical conductivity and electrochemically activ...

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Section: Tribological Behavior Of Mxenesmentioning

confidence: 99%

2D MXenes: Tunable Mechanical and Tribological Properties

2021

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“…MXenes are obtained by selective etching of the A layers from Mn+1AXn (where M: early transition metal, A: group IIIA or IVA element and X: C or N with n=1, 2 or 3) [145,146]. While their lubricious properties by themselves [147][148][149] or as part of composite coatings [150][151][152][153]…”

Section: Solid Lubrication With 2d Layered Materialsmentioning

confidence: 99%

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Rosenkranz

Costa

Baykara

et al. 2021

Tribology International

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Surface texturing and solid lubricants have demonstrated the ability to substantially reduce friction and wear under dry conditions. In recent decades, these two technologies have been combined to leverage the advantages of both for superior tribological performance. This review article first summarizes the state-of-the-art regarding surface texturing and solid lubricants, including soft metals, polytetrafluoroethylene, diamond-like carbon and 2D layered materials. Then, the synergy between surface textures and solid lubricants is discussed, with particular emphasis on the underlying mechanisms. Finally, gaps in the existing understanding of these synergies are identified and opportunities for future research are suggested.

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“…[ 92 ] MXene with large specific surface area, which can effectively promote ion transport and increase active sites, thereby significantly improving capacitor performance. [ 93 ] Benefiting from the mentioned properties, MXene and MXene‐based nanomaterials have been widely used in biosensors, [ 94–96 ] nanoadsorption, [ 97,98 ] catalysis, [ 99 ] ion screening, [ 100 ] LIBs, [ 101,102 ] SIBs, [ 103,104 ] PIBs, [ 105,106 ] SCs, [ 107–109 ] etc., [ 110–112 ] of which the electrochemical energy storage is the most prominent field.…”

Section: Synthesis and Properties Of Mxenementioning

confidence: 99%

Progress and Perspective: MXene and MXene‐Based Nanomaterials for High‐Performance Energy Storage Devices

Zhang

Sun

et al. 2021

Adv Elect Materials

132

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MXene, an emerging family of 2D transition metal carbides/nitride (MXene) materials, has attracted growing attention since its initial discovery in 2011. Owing to their extraordinary electrical conductivity, high mechanical stability, various functional groups, and large interlayer space, MXene and MXene‐based nanomaterials have shown significant energy‐storage capability. Firstly, research progress on the preparation strategies and properties of MXene are summarized. Secondly, the current state‐of‐the‐art advances of MXene and MXene‐based nanomaterials as advanced electrodes for energy storage devices, including lithium‐ion batteries, sodium‐ion batteries, potassium‐ion batteries, and supercapacitors are reviewed. Finally, the key challenges and perspectives for further enhancing their electrochemical performances are also outlined. This Progress Report offers a reference and scientific inspiration for the design and preparation of high‐performance MXene and MXene‐based nanomaterials to meet the increasing need for next‐generation energy‐storage systems.

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Multi-layer Ti3C2Tx-nanoparticles (MXenes) as solid lubricants – Role of surface terminations and intercalated water

Cited by 127 publications

References 41 publications

2D MXenes: Tunable Mechanical and Tribological Properties

2D MXenes: Tunable Mechanical and Tribological Properties

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Progress and Perspective: MXene and MXene‐Based Nanomaterials for High‐Performance Energy Storage Devices

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