A MXene of type Ti3C2Tx functionalized with copper nanoclusters for the fluorometric determination of glutathione

“…V 2 CT x , a typical member of the MXene family, has high activity that is derived from its metastable surface and will oxidize gradually when exposed to water or air, [ 29 ] which gives rise to the valence change in the outermost V atoms. This has inspired us to unleash the potential of V 2 CT x for Zn‐ion storage through in‐situ regulation of its surface V valences, making multi‐electron redox reactions a reality.…”

Section: Resultsmentioning

confidence: 99%

In‐Situ Electrochemically Activated Surface Vanadium Valence in V₂C MXene to Achieve High Capacity and Superior Rate Performance for Zn‐Ion Batteries

Liu

Jiang

et al. 2020

Adv Funct Materials

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189

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Vanadium‐based materials are fascinating potential cathodes for high energy density Zn‐ion batteries (ZIBs), due to their high capacity arising from multi‐electron redox chemistry. Most vanadium‐based materials suffer from poor rate capability, however, owing to their low conductivity and large dimension. Here, we propose the application of V2C MXene (V2CTx), a conductive 2D nanomaterial, for achieving high energy density ZIBs with superior rate capability. Through an initial charging activation, the valence of surface vanadium in V2CTx cathode is raised significantly from V2+/V3+ to V4+/V5+, forming a nanoscale vanadium oxide (VOx) coating that effectively undergoes multi‐electron reactions, whereas the inner V‐C‐V 2D multi‐layers of V2CTx are intentionally preserved, providing abundant nanochannels with intrinsic high conductivity. Owing to the synergistic effects between the outer high‐valence VOx and inner conductive V‐C‐V, the activated V2CTx presents an ultrahigh rate performance, reaching 358 mAh g−1 at 30 A g−1, together with remarkable energy and power density (318 Wh kg−1/22.5 kW kg−1). The structural advantages of activated V2CTx are maintained after 2000 cycles, offering excellent stability with nearly 100% Coulombic efficiency. This work provides key insights into the design of high‐performance cathode materials for advanced ZIBs.

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“…91 Previous research has suggested that the coexistence of water and oxygen, especially at high temperatures, will make MXene nanosheets unstable. 92,93 Thus, during the intercalation, many defects would be generated on MXene nanosheets, resulting in poor stability and a relatively low conductivity. 53,94 Moreover, the long-term hydrothermal treatment and ultrasonication would also lead to a decrease of lateral sizes of MXene nanosheets.…”

Section: Methods Classification Mxene Types Etchant Referencesmentioning

confidence: 99%

“…However, the yield of Ti 3 C 2 T x nanosheets based on this strategy was relatively low 91 . Previous research has suggested that the coexistence of water and oxygen, especially at high temperatures, will make MXene nanosheets unstable 92,93 . Thus, during the intercalation, many defects would be generated on MXene nanosheets, resulting in poor stability and a relatively low conductivity 53,94 .…”

Section: Synthesis and Processing Of Mxenesmentioning

confidence: 96%

Flexible MXene films for batteries and beyond

Huang

et al. 2022

Carbon Energy

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MXenes add dozens of metallic conductors to the family of two‐dimensional (2D) materials. A top‐down synthesis approach removing A‐layer atoms (e.g., Al, Si, and Ga) in MAX phases to produce 2D flakes attaches various surface terminations to MXenes. With these terminations, MXenes show tunable properties, promising a range of applications from energy storage devices to electronics, including sensors, transistors, and antennas. MXenes are also excellent building blocks to create flexible films used for flexible and wearable devices. This article summarizes the synthesis of MXene flakes and highlights aspects that need attention for flexible devices. Rather than listing the development of energy storage devices in detail, we focus on the main challenges of and solutions for constructing high‐performance devices. Moreover, we show the applications of MXene films in electronics to call on designs to construct a complete system based on MXene with good flexibility, which consists of a power source, sensors, transistors, and wireless communications.

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A MXene of type Ti3C2Tx functionalized with copper nanoclusters for the fluorometric determination of glutathione

Cited by 37 publications

References 34 publications

Ionic liquid exfoliated Ti₃C₂T_x MXene nanosheets for photoacoustic imaging and synergistic photothermal/chemotherapy of cancer

Ionic liquid exfoliated Ti₃C₂T_x MXene nanosheets for photoacoustic imaging and synergistic photothermal/chemotherapy of cancer

In‐Situ Electrochemically Activated Surface Vanadium Valence in V₂C MXene to Achieve High Capacity and Superior Rate Performance for Zn‐Ion Batteries

Flexible MXene films for batteries and beyond

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A MXene of type Ti3C2Tx functionalized with copper nanoclusters for the fluorometric determination of glutathione

Cited by 37 publications

References 34 publications

Ionic liquid exfoliated Ti3C2Tx MXene nanosheets for photoacoustic imaging and synergistic photothermal/chemotherapy of cancer

Ionic liquid exfoliated Ti3C2Tx MXene nanosheets for photoacoustic imaging and synergistic photothermal/chemotherapy of cancer

In‐Situ Electrochemically Activated Surface Vanadium Valence in V2C MXene to Achieve High Capacity and Superior Rate Performance for Zn‐Ion Batteries

Flexible MXene films for batteries and beyond

Contact Info

Product

Resources

About

Ionic liquid exfoliated Ti₃C₂T_x MXene nanosheets for photoacoustic imaging and synergistic photothermal/chemotherapy of cancer

Ionic liquid exfoliated Ti₃C₂T_x MXene nanosheets for photoacoustic imaging and synergistic photothermal/chemotherapy of cancer

In‐Situ Electrochemically Activated Surface Vanadium Valence in V₂C MXene to Achieve High Capacity and Superior Rate Performance for Zn‐Ion Batteries