Ti3C2Tx MXene/carbon composites for advanced supercapacitors: Synthesis, progress, and perspectives

Cai, Yanqing; Chen, Xinggang; Xu, Ying; Zhang, Yalin; Liu, Huijun; Zhang, Hongjuan; Tang, Jing

doi:10.1002/cey2.501

Cited by 33 publications

(2 citation statements)

References 144 publications

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“…In the preparation of biomass-derived hard carbon anodes, various plant organs such as stems, leaves, flowers, and fruits are commonly used as precursors . These plant organs possess diverse microstructures, which undergo transformation into porous carbon structures during high-temperature carbonization.…”

Section: Classification and Properties Of Biomass-derived Hard Carbonmentioning

confidence: 99%

“…In the preparation of biomass-derived hard carbon anodes, various plant organs such as stems, leaves, flowers, and fruits are commonly used as precursors. 139 These plant organs possess diverse microstructures, which undergo transformation into porous carbon structures during high-temperature carbonization. While some microstructures are retained, their characteristics facilitate the embedding and detachment of Na + , making them suitable for anode materials in SIBs.…”

Section: Plant and Animal Organ Derivativesmentioning

confidence: 99%

See 1 more Smart Citation

Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Basic Research and Industrial Application

Zhong,

Liu,

Xiong

et al. 2024

ACS Nano

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Section: Classification and Properties Of Biomass-derived Hard Carbonmentioning

confidence: 99%

Section: Plant and Animal Organ Derivativesmentioning

confidence: 99%

Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Basic Research and Industrial Application

Zhong,

Liu,

Xiong

et al. 2024

ACS Nano

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Surface ‒OH Termination‐Reduced Ti₃C₂T_x Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density

Shi,

Ma,

Sun

et al. 2024

Adv Funct Materials

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Highly conductive Ti3C2Tx pseudo‐capacitors hold promise to expand energy density by utilizing ionic liquid (IL) electrolytes (e.g., 1‐ethyl‐3‐methylimidazolium bis trifluoromethane sulfonyl imide, EMITFSI) that possesses broaden voltage window, resulting in various applications involving hybrid vehicle, rail transportation, and power system. However, abundantly random surface ‒OH terminations cannot maintain an extremely stabilized Ti3C2Tx layer spacing framework for efficient ion arrangements, increase ionic diffusion barriers, and decline in energy density. Herein, intensely chemical covalent bonding interactions of ‒SH, ‒COOH, and ‒NH2 terminated L‐cysteine molecules with ‒OH terminations are proposed to stabilize Ti3C2Tx and expand interlayer structure, allowing sufficient ionic transport and realizing high energy‐density Ti3C2Tx pseudo‐capacitors. It is found that, with cysteine molecules stayed flat to Ti3C2Tx layer, superior hydrophilic surface, and increased interlayer spacing to 1.51 nm, 2.16‐folds higher than Ti3C2Tx electrode, the Ti3C2Tx‒cysteine electrode delivered high capacitance of 279 F g−1 in EMITFSI/acetonitrile electrolyte. Assembled asymmetric Ti3C2Tx‒cysteine//activated carbon flexible device exhibited a high voltage of 2.9 V and a high energy density of 72.1 Wh kg−1 at a power density of 874 W kg−1, which could power various colored smart rollable flexible electronics at bent angle of 90°. Additionally, identical mechanisms are found in Ti3C2Tx‐amino acid systems, wherein amino acid stayed flat between Ti3C2Tx layers with optimized content, interlayer spacing, and capacitance, no matter amino acid in different charged feature and different sidechain lengths (e.g., glutamine, cysteine, and lysine). The present study provides systematically experimental evidence for improving ion accessibility in IL electrolytes based on an organic‐modified Ti3C2Tx electrode structure.

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Local Oxygen Reconstruction Enables Dual‐Ion Active Sites in Carbon Cathode for High Energy Density Sodium‐Ion Capacitors

Li,

Liu,

et al. 2024

Adv Funct Materials

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Carbon materials are the promising cathode material for sodium‐ion capacitors (SICs) with high energy/power density, however, clarifying the evolution processes of functional groups in carbon materials and revealing their energy storage mechanisms are full of challenges. Inspired by the ancient practice of alchemy, which sought to purify Dan medicine and remove impurities through precise control of the refining temperature, the local oxygen reconstruction strategy, to alter the functional groups species in SP3‐C, is pioneeringly utilized, achieving targeted regulation of carbonyl groups with increase from 27.9 to 43.3 at%, which efficiently change the electronic structure of the carbon framework and realize the dual‐ion adsorption of Na+ and ClO4−, according well with the theoretical calculations. As expected, the obtained carbon cathode delivers a specific capacity of 145 mAh g−1, higher than that of the parent carbon material (95 mAh g−1). Impressively, the ex situ X‐ray Photoelectron Spectroscopy and in situ Raman reveals that carbonyl can act as dual‐ion active sites for Na+ and ClO4− through pseudocapacitive behavior under different voltage states. Notably, the assembled SIC using the carbonyl‐rich carbon cathode exhibits an ultrahigh energy density of 162 Wh kg−1. This work opens a novel avenue for regulating the carbonyl content of carbon materials.

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Ti₃C₂T_x MXene/carbon composites for advanced supercapacitors: Synthesis, progress, and perspectives

Cited by 33 publications

References 144 publications

Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Basic Research and Industrial Application

Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Basic Research and Industrial Application

Surface ‒OH Termination‐Reduced Ti₃C₂T_x Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density

Local Oxygen Reconstruction Enables Dual‐Ion Active Sites in Carbon Cathode for High Energy Density Sodium‐Ion Capacitors

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Ti3C2Tx MXene/carbon composites for advanced supercapacitors: Synthesis, progress, and perspectives

Cited by 33 publications

References 144 publications

Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Basic Research and Industrial Application

Biomass-Derived Hard Carbon for Sodium-Ion Batteries: Basic Research and Industrial Application

Surface ‒OH Termination‐Reduced Ti3C2Tx Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density

Local Oxygen Reconstruction Enables Dual‐Ion Active Sites in Carbon Cathode for High Energy Density Sodium‐Ion Capacitors

Contact Info

Product

Resources

About

Ti₃C₂T_x MXene/carbon composites for advanced supercapacitors: Synthesis, progress, and perspectives

Surface ‒OH Termination‐Reduced Ti₃C₂T_x Pseudo‐capacitors with Reinforced Ionic Liquid Accessibility to Achieve High Energy Density