4.8 Article

Unraveling the Role of Metal Vacancy Sites and Doped Nitrogen in Enhancing Pseudocapacitance Performance of Defective MXene

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Surface Engineering of Copper Catalyst through CO* Adsorbate

Henry Yu et al.

Summary: The electrochemical reduction of CO2 with Cu based catalysts is closely related to the instantaneous local chemical environment of the catalyst-electrolyte interface. This microenvironment fluctuates depending on the concentration of surface-adsorbed competing reaction intermediates and the applied electrode potential. Quantifying the complex interdependence between electrode potential, CO* coverage, and the interfacial field strength, our study reveals the strong influence of CO* coverage on the field strength, suggesting its significance in determining the selectivity towards multicarbon products. Additionally, our results demonstrate the potential of surface additives to modulate interfacial fields for tailored electrochemical pathways.

JOURNAL OF PHYSICAL CHEMISTRY C (2023)

Article Chemistry, Physical

Flexible solid-state supercapacitor integrated by methanesulfonic acid/polyvinyl acetate hydrogel and Ti3C2Tx

Chuanfang Liu et al.

Summary: MXenes have shown promising results as solid-state super-capacitor (SSS) electrode materials. However, the rate performances of MXene-based SSSs are currently inferior to aqueous devices. In this study, the performance of MXene-based SSS is optimized by introducing a green, low temperature resistant and highly ionic conductive methanesulfonic acid/polyvinyl acetate (MSA/PVA) hydrogel as electrolyte. The optimized SSS exhibits high areal capacitance, long cycle life, low-temperature resistance, and flexibility. Moreover, it shows superior capacitance and rate performance compared to aqueous supercapacitors.

ENERGY STORAGE MATERIALS (2023)

Article Chemistry, Multidisciplinary

Revealing High-Rate and High Volumetric Pseudo-Intercalation Charge Storage from Boron-Vacancy Doped MXenes

Zhaoxi Liu et al.

Summary: Controllable and selective etching of B atoms from B-doped Ti3AlC2 precursors has been reported, generating boron-vacancy doped MXene (B-V-MXene) nanosheets with finely-regulated, ion-intercalation structures. Ti around vacancies possess higher surface-redox activity than pristine MXenes, improving capacitances. In addition, the dopant B atoms increase electron density on Ti, facilitating adsorption and migration of ions.

ADVANCED FUNCTIONAL MATERIALS (2023)

Review Chemistry, Multidisciplinary

Recent progress in MXene layers materials for supercapacitors: High-performance electrodes

Yitong Wang et al.

Summary: In 2011, Gogotsi et al. discovered a new type of two-dimensional transition metal carbides and nitrides, called MXenes, which have become a dazzling new star in the energy storage industry. MXenes have high mechanical flexibility, high energy density, and good electrochemical performance, making them suitable for supercapacitor applications. However, the self-stacking of MXene layers results in the loss of electrochemically active sites. Structural optimization and composite doping are effective strategies to enhance the electrochemical performance of MXenes. This review summarizes recent advances in MXene synthesis, fundamental properties, and composite materials, focusing on their electrochemical performance and the challenges and opportunities they face in the energy storage field.

SMARTMAT (2023)

Article Chemistry, Multidisciplinary

A General Strategy for Engineering Single-Metal Sites on 3D Porous N, P Co-Doped Ti3C2Tx MXene

Wei Peng et al.

Summary: A general synthetic strategy was reported for engineering single-metal sites on 3D porous N, P codoped Ti3C2Tx nanosheets, resulting in highly active and stable electrocatalysts for the hydrogen evolution reaction (HER).

ACS NANO (2022)

Article Chemistry, Physical

Relationship between Electric Double-Layer Structure of MXene Electrode and Its Surface Functional Groups

Tatau Shimada et al.

Summary: In this study, the atomic-scale double-layer structure of MXene electrodes with different terminated halogen elements was systematically investigated using density functional theory calculations. The results showed a clear relationship between the atomic number of the terminated halogen atoms and the capacitance.

CHEMISTRY OF MATERIALS (2022)

Review Chemistry, Physical

MXene Nanoarchitectonics: Defect-Engineered 2D MXenes towards Enhanced Electrochemical Water Splitting

Yi Tang et al.

Summary: This review systematically summarizes the strategies involved in defect engineering in MXenes-based catalysts and provides insights into the mechanisms that govern the catalytic activity of defects. Current challenges and future opportunities in this field are also discussed.

ADVANCED ENERGY MATERIALS (2022)

Article Nanoscience & Nanotechnology

N-doped MXene derived from chitosan for the highly effective electrochemical properties as supercapacitor

Liuyue Pu et al.

Summary: A new type of N-doped MXene nanomaterial was prepared from non-toxic biological chitosan and MXene as a potential electrode for supercapacitors, showing high specific capacitance and excellent stability after 10,000 charge and discharge cycles. This was attributed to the lone pair of electrons of the N atom and increased interlayer distance in the N-doped MXene.

ADVANCED COMPOSITES AND HYBRID MATERIALS (2022)

Article Chemistry, Physical

How Water Attacks MXene

Tao Wu et al.

Summary: In this study, the interfacial chemistry between water and MXene is investigated using first-principles molecular dynamics simulations. It is found that water molecules can attack the MXene surface and reconstruct it, which highlights the susceptibility of MXene to water attack. The stability of the MXene surface can be improved by preventing close encounters of water molecules and the surface atoms.

CHEMISTRY OF MATERIALS (2022)

Review Chemistry, Multidisciplinary

Element-Doped Mxenes: Mechanism, Synthesis, and Applications

Ronghao Wang et al.

Summary: This article comprehensively discusses the syntheses, properties, and emerging applications of heteroatom-doped MXenes materials. It summarizes the doping strategies, synthesis methods, and theoretical simulations of high-performance MXenes materials. The mechanisms underlying their advantageous uses for energy storage, catalysis, sensors, environmental purification, and biomedicine are highlighted. Future opportunities and challenges for the study and application of multifunctional high-performance MXenes are presented.

SMALL (2022)

Article Engineering, Environmental

Regulating Fe-O bond in Ti3C3Tx MXene anode for high-capacity Li-ion batteries

Nana Zhao et al.

Summary: This study investigates the mechanism of enhanced Li-ion adsorption on Fe-Ti3C2Tx MXene through electron transfer on Fe-O bond. Experimental observations confirm the successful introduction of Fe atoms into the MXene structure and the greatly improved electrochemical performance of Fe-Ti3C2Tx electrode.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Physical

Enhanced supercapacitive performance of Mo1.33C MXene based asymmetric supercapacitors in lithium chloride electrolyte

Ahmed El Ghazaly et al.

Summary: Two-dimensional Mo1.33C MXene shows great potential for energy storage applications, especially in LiCl electrolyte where it demonstrates excellent electrochemical performance and high energy density. MXene-based asymmetric supercapacitors exhibit wide voltage window, high power density, and outstanding cyclic stability, making them promising for practical applications.

ENERGY STORAGE MATERIALS (2021)

Article Chemistry, Multidisciplinary

Industry-Scale and Environmentally Stable Ti3C2Tx MXene Based Film for Flexible Energy Storage Devices

Leiping Liao et al.

Summary: The study developed a heteroatom doping strategy along with the addition of large-sized reduced graphene oxide to achieve a scalable production of MXene films with high mechanical strength and energy storage properties. The resulting SNMG-40 film demonstrated excellent long-term cycling stability and mechanical durability under different deformation conditions. This strategy makes MXene materials more competitive for real-world applications such as flexible electronics and electromagnetic interference shielding.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Electrochemistry

Sulfur and nitrogen codoped Nb2C MXene for dendrite-free lithium metal battery

Wenyang Zhang et al.

Summary: By confining Li into sulfur and nitrogen codoped Nb2C MXene, a more practical Li anode with strong dendrite inhibiting ability and excellent electrochemical performance has been synthesized, showing prominent practical performance in full cell.

ELECTROCHIMICA ACTA (2021)

Article Physics, Condensed Matter

Properties of the Pt(111)/electrolyte electrochemical interface studied with a hybrid DFT-solvation approach

Rebekka Tesch et al.

Summary: In this study, the ESM-RISM method was adopted to model the charged interface between a Pt(111) surface and an aqueous acidic electrolyte, showing capability in describing chemisorption and charging state at the interface. The results demonstrate the ability of ESM-RISM to replicate key interface properties, such as the non-monotonic charging relation of the Pt(111)/electrolyte interface. Comparisons with other theoretical models and explicit simulations highlight both strengths and limitations of ESM-RISM in modeling electrochemical interfaces.

JOURNAL OF PHYSICS-CONDENSED MATTER (2021)

Article Chemistry, Physical

Tailoring Ti3CNTx MXene via an acid molecular scissor

Ningjun Chen et al.

Summary: This study demonstrates the use of an acid molecular scissor to tailor Ti3CNTx MXene at the atomic scale, resulting in enhanced redox-active sites, improved specific capacitance, and electrochemical performance. The tailored Ti3CNTx MXene was further assembled into a micro-supercapacitor with high volumetric capacitance and energy density. This work offers a new strategy for enhancing MXenes for various applications including energy storage.

NANO ENERGY (2021)

Article Chemistry, Multidisciplinary

Designing and Understanding the Superior Potassium Storage Performance of Nitrogen/Phosphorus Co-Doped Hollow Porous Bowl-Like Carbon Anodes

Jiamin Chen et al.

Summary: A novel carbon-based anode material N/P-HPCB was developed for high-performance potassium-ion batteries (PIBs), demonstrating high reversible capacity, superior rate performance, and long-term cycling stability. Density-functional theory calculations and experimental validation reveal that N/P dual doping advantages facilitate adsorption/diffusion of K+ and enhance electronic conductivity in the electrode.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Multidisciplinary

How Much Oxygen Can a MXene Surface Take Before It Breaks?

Ingemar Persson et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Article Chemistry, Physical

Enhancement of Ti3C2 MXene Pseudocapacitance after Urea Intercalation Studied by Soft X-ray Absorption Spectroscopy

Ameer Al-Temimy et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2020)

Article Chemistry, Multidisciplinary

Capacitive versus Pseudocapacitive Storage in MXene

Yasunobu Ando et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Article Chemistry, Multidisciplinary

Nitrogen-Doped Ti3C2 MXene: Mechanism Investigation and Electrochemical Analysis

Chengjie Lu et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Review Chemistry, Multidisciplinary

Pseudocapacitance: From Fundamental Understanding to High Power Energy Storage Materials

Simon Fleischmann et al.

CHEMICAL REVIEWS (2020)

Article Chemistry, Physical

Understanding MXene-Based Symmetric Supercapacitors and Redox Electrolyte Energy Storage

Yapeng Tian et al.

ACS APPLIED ENERGY MATERIALS (2020)

Review Chemistry, Physical

Perspectives for electrochemical capacitors and related devices

Patrice Simon et al.

NATURE MATERIALS (2020)

Article Chemistry, Physical

Porous nitrogen-doped MXene-based electrodes for capacitive deionization

Ahmad Amiri et al.

ENERGY STORAGE MATERIALS (2020)

Article Chemistry, Multidisciplinary

Element Replacement Approach by Reaction with Lewis Acidic Molten Salts to Synthesize Nanolaminated MAX Phases and MXenes

Mian Li et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Energy & Fuels

Influences from solvents on charge storage in titanium carbide MXenes

Xuehang Wang et al.

NATURE ENERGY (2019)

Article Chemistry, Multidisciplinary

Revealing the Pseudo-Intercalation Charge Storage Mechanism of MXenes in Acidic Electrolyte

Xinpeng Mu et al.

ADVANCED FUNCTIONAL MATERIALS (2019)

Article Chemistry, Physical

Versatile N-Doped MXene Ink for Printed Electrochemical Energy Storage Application

Lianghao Yu et al.

ADVANCED ENERGY MATERIALS (2019)

Review Multidisciplinary Sciences

Energy storage: The future enabled by nanomaterials

Ekaterina Pomerantseva et al.

SCIENCE (2019)

Article Chemistry, Physical

Computational Screening of MXene Electrodes for Pseudocapacitive Energy Storage

Cheng Zhan et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2019)

Article Materials Science, Multidisciplinary

Interfacial and electronic properties of heterostructures of MXene and graphene

Rui Li et al.

PHYSICAL REVIEW B (2019)

Review Chemistry, Multidisciplinary

MXene as a Charge Storage Host

Masashi Okubo et al.

ACCOUNTS OF CHEMICAL RESEARCH (2018)

Article Electrochemistry

Nitrogen and Sulfur Co-Doped 2D Titanium Carbides for Enhanced Electrochemical Performance

Chenhui Yang et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2017)

Review Nanoscience & Nanotechnology

2D metal carbides and nitrides (MXenes) for energy storage

Babak Anasori et al.

NATURE REVIEWS MATERIALS (2017)

Article Chemistry, Multidisciplinary

Atomic Defects in Monolayer Titanium Carbide (Ti3C2Tx) MXene

Xiahan Sang et al.

ACS NANO (2016)

Article Chemistry, Physical

The role of terminations and coordination atoms on the pseudocapacitance of titanium carbonitride monolayers

Wenqiang Zhang et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2016)

Article Chemistry, Multidisciplinary

Atomically Resolved Structural and Chemical Investigation of Single MXene Sheets

Linda H. Karlsson et al.

NANO LETTERS (2015)

Article Multidisciplinary Sciences

Pseudocapacitance of MXene nanosheets for high-power sodium-ion hybrid capacitors

Xianfen Wang et al.

NATURE COMMUNICATIONS (2015)

Article Multidisciplinary Sciences

Conductive two-dimensional titanium carbide 'clay' with high volumetric capacitance

Michael Ghidiu et al.

NATURE (2014)

Article Chemistry, Multidisciplinary

Analytic Projection From Plane-Wave and PAW Wavefunctions and Application to Chemical-Bonding Analysis in Solids

Stefan Maintz et al.

JOURNAL OF COMPUTATIONAL CHEMISTRY (2013)

Article Chemistry, Multidisciplinary

Two-Dimensional Nanocrystals Produced by Exfoliation of Ti3AlC2

Michael Naguib et al.

ADVANCED MATERIALS (2011)

Review Physics, Condensed Matter

QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials

Paolo Giannozzi et al.

JOURNAL OF PHYSICS-CONDENSED MATTER (2009)

Review Chemistry, Physical

Materials for electrochemical capacitors

Patrice Simon et al.

NATURE MATERIALS (2008)