Rational design of porous nitrogen-doped Ti3C2 MXene as a multifunctional electrocatalyst for Li–S chemistry

Song, Yingze; Sun, Zhongti; Fan, Zhaodi; Cai, Wenlong; Shao, Yuanlong; Sheng, Guan; Wang, Menglei; Song, Lixian; Liu, Zhongfan; Zhang, Qiang

doi:10.1016/j.nanoen.2020.104555

Cited by 214 publications

(141 citation statements)

References 47 publications

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“…[89] Very recently, Song et al prepared porous N-doped MXene (P-NTC) via a similar protocol for Li-SBs ( Figure 7f). [90] As illustrated in Figure 7g, the porous structure of the P-NTC can provide rich active sites for the adsorption and conversion of LiPS species. The nitrogen doping not only enhances the interfacial interaction between the P-NTC and Li atoms and Li 2 S cluster, thus facilitating the Li 2 S nucleation kinetics, but also decreases the dissociation barrier of Li 2 S on P-NTC, resulting in accelerated Li 2 S decomposition.…”

Section: Mxene Sulfur Hostmentioning

confidence: 99%

“…Based on these findings, a multifunctional electrocatalytic mechanism was proposed instead of conventional chemical adsorption behavior. The as-fabricated P-NTC not only immobilizes the LiPSs, but also acts as a multifunctional catalyst to enhance both the decomposition and precipitation of Li 2 S. [90] In addition, Zhang et al developed robust, flexible, highly conductive free-standing S@Ti 3 C 2 T x ink and Ti 3 C 2 T x /S paper as sulfur hosts by two different strategies. [91] Remarkably, the Ti 3 C 2 T x /S electrode exhibited outstanding stability with a low capacity decay rate of 0.014% per cycle for 1500 cycles, which is due to the conversion of initially formed thiosulfate species to sulfates during cycling.…”

Section: Mxene Sulfur Hostmentioning

confidence: 99%

“…Based on these findings, a multifunctional electrocatalytic mechanism was proposed instead of conventional chemical adsorption behavior. The as‐fabricated P‐NTC not only immobilizes the LiPSs, but also acts as a multifunctional catalyst to enhance both the decomposition and precipitation of Li 2 S. [ 90 ] In addition, Zhang et al. developed robust, flexible, highly conductive free‐standing S@Ti 3 C 2 T x ink and Ti 3 C 2 T x /S paper as sulfur hosts by two different strategies.…”

Section: Applications In Electrochemical Energy Storagementioning

confidence: 99%

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MXenes for Rechargeable Batteries Beyond the Lithium‐Ion

et al. 2020

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past few decades. [2] In spite of the great success of the LIBs in consumer electronics and electric vehicles, their gridscale implementation is hindered by the limited lithium resources (only 20 ppm in the earth's crust) as well as the safety concerns. [3] In this regard, many other EES systems based on more abundant and less active elements, such as sodium (2.3%), potassium (2.1%), magnesium (2.3%), aluminum (8.2%), and zinc (75 ppm), have been developed and have already achieved significant progress. [1d,4] Historically, 2D layered materials have been employed as electrodes for batteries (e.g., graphite, [5] LiCoO 2 , [6] and TiS 2 [7]). Since the discovery of monolayer graphene in 2004, [8] more and more emerging 2D materials have quickly become popular electrode materials for various EES devices. This is not surprising given the unique structure and property of 2D materials. Their relatively large interlayer space allows fast ion (de)intercalation, whereas the highly anisotropic 2D structure enables fast charge transfer. Recently, a new class of 2D transition metal carbides, nitrides, and carbonitrides, known as MXenes, [9] was discovered and has attracted increasing research interest. Up to date, more than 30 MXenes have been successfully synthesized. [10] Similar to other 2D layered materials, MXenes also possess large/tunable interlayer spaces and high aspect ratios. In addition, MXenes show excellent hydrophilicity (contact angle is ≈21.5°-35°) [11] and extraordinary conductivity (e.g., ≈9880 S cm −1 for Ti 3 C 2 T x , 3250 ± 100 S cm −1 for V 2 CT x). [12] Further, MXenes are coupled with various terminations (e.g., OH, O, and F), which endow rich surface chemistries. These unique properties make them appealing in various applications, especially for energy storage devices such as batteries and supercapacitors. [1d,4i,13] We noted that there have already been several excellent reviews on the application of MXenes for energy storage and conversion, which cover a wide range of topics including for LIBs, supercapacitors, electrocatalysis, photocatalysis, electromagnetic interference, and so on. [10a,14] However, a more specific summary focuses on the rechargeable batteries is required and beneficial for the researchers working on nextgeneration batteries. Moreover, the study and investigation on MXenes for other EES systems beyond LIB are rapidly developing and have achieved great progress very recently. For example, great research efforts have been invested in exploring the application of MXenes in Li-sulfur batteries Research on next-generation battery technologies (beyond Li-ion batteries, or LIBs) has been accelerating over the past few years. A key challenge for these emerging batteries has been the lack of suitable electrode materials, which severely limits their further developments. MXenes, a new class of 2D transition metal carbides, carbonitrides, and nitrides, are proposed as electrode materials for these emerging batteries due to several desirable attributes. These attributes include large a...

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Section: Mxene Sulfur Hostmentioning

confidence: 99%

Section: Mxene Sulfur Hostmentioning

confidence: 99%

Section: Applications In Electrochemical Energy Storagementioning

confidence: 99%

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MXenes for Rechargeable Batteries Beyond the Lithium‐Ion

et al. 2020

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“…With regard to battery performances, 2D MXene nanosheets can dramatically alleviate the volume variation during charge/ discharge cycles, while the employed heteroatoms or nanomaterials, acting as space fillers, can efficiently prevent the restacking of MXene nanosheets for optimizing charge transfer and ion storage. [159][160][161][162][163][164][165] For example, Song et al [159] reported that porous N-doped MXene Ti 3 C 2 T x , as a promising electrocatalyst, was successfully fabricated by a melamine formaldehyde template route for Li-S chemistry. Figure 9a shows the capture and conversion of lithium polysulfides (LiPSs) by porous N-doped MXene Ti 3 C 2 T x : i) the MXene framework with porous structure, large surface area, and high electrical conductivity, offers a number of active sites for the adsorption and conversion of LiPSs; ii) the N doping efficiently enhances the interfacial interaction between Li 2 S cluster and porous N-doped MXene Ti 3 C 2 T x , thereby accelerating the Li 2 S nucleation kinetics, and greatly lowers the dissociation barrier of Li 2 S on porous N-doped MXene Ti 3 C 2 T x , and thus promotes the Li 2 S decomposition reaction; iii) the low diffusion barrier of Li atoms on porous N-doped MXene Ti 3 C 2 T x significantly facilitates sulfur redox kinetics.…”

Section: Energy Storage and Conversionmentioning

confidence: 99%

“…[173,174] To further enhance the electrochemical performance of MXenes, heteroatom-doped MXenes x MXene at 5.0 C. Reproduced with permission. [159] Copyright 2020, Elsevier B.V. e) The schematic illustrating the working mechanism of 3D advanced MXene/Si-based superstructures including MXene matrix, Si, SiO x layer, and N-doped carbon (MXene/Si@SiO x @C) in Li-ion batteries; f) EIS of MXene/Si@SiO x @C-1, MXene/Si@SiO x @C-2, MXene/Si@SiO x @C-3, and commercial Si/C; g) charge/discharge profiles of MXene/Si@SiO x @C-2 electrode at different current rates, and h) cycling performance of MXene/Si@SiO x @C-1, MXene/Si@SiO x @C-2, MXene/Si@SiO x @C-3, and bare Si electrodes at 0.2 C for 200 cycles. Reproduced with permission.…”

Section: (15 Of 32)mentioning

confidence: 99%

Recent Advances in Functional 2D MXene‐Based Nanostructures for Next‐Generation Devices

Huang

Tang

et al. 2020

Adv Funct Materials

247

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Similar to graphene and black phosphorus (BP), 2D transition metal carbides and nitrides (MXenes) are of great interest in a variety of fields, such as energy storage and conversion, sensors, electromagnetic interference (EMI) shielding, and photothermal therapy due to their excellent conductivity and hydrophilicity, large specific capacitance, high photothermal effect, and superior electrochemical performance. To further broaden applicable ranges beyond their existing boundaries and fully exploit these potentials, functional 2D MXene nanostructures in recent years have been rationally designed and developed by various approaches, such as doping strategies, surface functionalization, and hybridization, for next-generation devices with the merits of low power consumption, intelligence, and high-integration chips. This review provides an overview of the synthetic routes and fundamental properties of functional 2D MXene nanostructures, including surfacemodified 2D MXenes and mixed-dimensional MXene-based heterostructures, highlights the state-of-the-art progress in the applications of functional 2D MXene nanostructures with regard to energy storage and conversion, catalysis, sensors, photodetectors, EMI shielding, degradation, and biomedical applications, and presents the challenges and perspectives in these burgeoning fields. It is hoped that this review will inspire more efforts toward fundamental research on new functional 2D MXene-based devices to satisfy the growing requirements for next-generation systems.

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