One‐Step Construction of Ordered Sulfur‐Terminated Tantalum Carbide MXene for Efficient Overall Water Splitting

Wu, Tong; Pang, Xin; Zhao, Siwei; Xu, Shumao; Wang, Qingqing; Li, Yongsheng; Huang, Fuqiang

doi:10.1002/sstr.202100206

Cited by 41 publications

(27 citation statements)

References 49 publications

(51 reference statements)

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“…However, the conventional preparation of MXenes by selectively etching A atoms from MAX phase materials (A, IVA, or IIIA group elements such as Al) with disorderly terminated −O/OH/F groups might be overshadowed by their small specific capacities (mostly for Li + storage, less than 150 mAh·g –1 ), − suppressed electronic conductivity, and a decreased instinctive chemical stability. − …”

Section: Anionic Activity In Interface Engineeringmentioning

confidence: 99%

Anionic Activity in Fast-Charging Batteries: Recent Advances, Prospects, and Challenges

Peng

Pang

et al. 2022

ACS Materials Lett.

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The increasing demand for fast-charging batteries to expedite the widespread adoption of electric vehicles calls for continual improvements of the anode materials to confer high energy and power densities. However, the fundamental limitations of the mainstream graphite and Li-metal anodes for fast-charging applications include the capacity fading and safety issues mainly caused by the Li plating, as well as the sluggish transport kinetics at large current densities. Recently, great attention has been paid to the emergence of large-capacity anodes by tailoring the bonding covalency to modulate the electronic structure and alter the insertion voltage for boosting fast-charging ability and suppressing metal plating. Development of new fast-charging materials by tailoring anionic activity allows us to better understand the key aspects of the bond covalency and band positioning for cation/anion doping and interface/ surface engineering. This Review provides an overview of the recent advances in the development of fast-charging anodes around tuning the bonding covalency by bimetal modulation; alloying hard and soft anions to alter the electronic structure and metal plating voltage; constructing anion-derived interfacial films; and surface substituting the ordered terminal groups. Furthermore, we highlight the practical limits of capacity fading at large current densities and describe potential strategies of anionic redox in phosphides and interfacial energy storage of conversion-type anodes to offer additional capacities. We also discuss the prospects for the commercial adoption of high-performance anodes containing various elements to rival the prevalent graphite or Li anodes for fast-charging applications.

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Section: Anionic Activity In Interface Engineeringmentioning

confidence: 99%

Anionic Activity in Fast-Charging Batteries: Recent Advances, Prospects, and Challenges

Peng

Pang

et al. 2022

ACS Materials Lett.

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“…Electrochemical water splitting, including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), is a sustainable route for the continuous generation of hydrogen. [1][2][3][4][5][6][7][8] The commercial Pt/C and RuO 2 have been regarded as typical catalysts for HER and OER, respectively, but the poor stability at largecurrent densities and scarcity limit their wide application. [3,9] Despite aplenty reserves, most non-noble metal electrocatalysts such as MoS 2 and NiS 2 , have attracted extensive attention for alkaline water splitting, owing to their superior electrocatalytic performances at small current densities (<200 mA cm −2 ).…”

Section: Introductionmentioning

confidence: 99%

Bimetal Modulation Stabilizing a Metallic Heterostructure for Efficient Overall Water Splitting at Large Current Density

Zhang

et al. 2022

Advanced Science

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Large current‐driven alkaline water splitting for large‐scale hydrogen production generally suffers from the sluggish charge transfer kinetics. Commercial noble‐metal catalysts are unstable in large‐current operation, while most non‐noble metal catalysts can only achieve high activity at low current densities <200 mA cm−2, far lower than industrially‐required current densities (>500 mA cm−2). Herein, a sulfide‐based metallic heterostructure is designed to meet the industrial demand by regulating the electronic structure of phase transition coupling with interfacial defects from Mo and Ni incorporation. The modulation of metallic Mo2S3 and in situ epitaxial growth of bifunctional Ni‐based catalyst to construct metallic heterostructure can facilitate the charge transfer for fast Volmer H and Heyrovsky H2 generation. The Mo2S3@NiMo3S4 electrolyzer requires an ultralow voltage of 1.672 V at a large current density of 1000 mA cm−2, with ≈100% retention over 100 h, outperforming the commercial RuO2||Pt/C, owing to the synergistic effect of the phase and interface electronic modulation. This work sheds light on the design of metallic heterostructure with an optimized interfacial electronic structure and abundant active sites for industrial water splitting.

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“…[1,2] The dimensionality reduction of MAX brings myriad possibilities in creating 2D materials with emergent properties. [3][4][5] Among the current 2D material family, transition metal carbides and nitrides (MXenes) stand out because they own a unique set of innate characteristics (e.g., metallic conductivity [6] and solution processability [7] ) that render them promising for various applications, such as energy storage, [8][9][10] sensing, [11] electrocatalysis, [12,13] and electromagnetic interference (EMI) shielding. [14][15][16] In most cases, the assembly of MXene flakes into freestanding, macroscopic films is a prerequisite to realizing these applications.…”

Section: Introductionmentioning

confidence: 99%

Gelation‐Assisted Assembly of Large‐Area, Highly Aligned, and Environmentally Stable MXene Films with an Excellent Trade‐Off between Mechanical and Electrical Properties

Huang

Zhou

et al. 2022

Small

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Layered MXene films have shown enormous potential for wide applications due to their high electrical conductivity and unique laminated microstructure. However, the intrinsic susceptibility to oxidation and the mechanical fragility of MXene films are the two major bottlenecks that prevent their widespread industrial applications. Here, a facile yet efficient assembly strategy is proposed to address these issues by increasing the alignment and compactness of MXene layers as well as strengthening the interlayer interactions. This method involves the gelation of MXene flakes with a multifunctional inorganic “mortar” polymer (ammonium polyphosphate, APP) followed by quasi‐solid‐state assembly enabled by a mechanical rolling process, by which the 3D gel network is transformed into 2D freestanding MXene films with unprecedented flake alignment and compactness. Besides, due to the multiple molecular‐level interactions (hydrogen bonding, coordination bonding, and electrostatic force) between APP and MXene flakes, the resultant MXene‐APP film (MAF) displays high mechanical strength (286.4 ± 20.3 MPa) and excellent electrical conductivity (8012.4 ± 325.6 S cm−1), along with remarkable environmental stability. As an application demonstration, MAF exhibits outstanding electromagnetic interference shielding effectiveness with long‐term durability, highlighting the great potential of this gelation‐assisted assembly strategy in fabricating large‐area, high‐performance MXene films for diverse real‐world applications.

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One‐Step Construction of Ordered Sulfur‐Terminated Tantalum Carbide MXene for Efficient Overall Water Splitting

Cited by 41 publications

References 49 publications

Anionic Activity in Fast-Charging Batteries: Recent Advances, Prospects, and Challenges

Anionic Activity in Fast-Charging Batteries: Recent Advances, Prospects, and Challenges

Bimetal Modulation Stabilizing a Metallic Heterostructure for Efficient Overall Water Splitting at Large Current Density

Gelation‐Assisted Assembly of Large‐Area, Highly Aligned, and Environmentally Stable MXene Films with an Excellent Trade‐Off between Mechanical and Electrical Properties

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