Ultrathin two-dimensional nanosheet metal-organic frameworks with high-density ligand active sites for advanced lithium-ion capacitors

Xiao, Xuhuan; Deng, Xinglan; Tian, Ye; Tao, Shusheng; Song, Zirui; Deng, Wentao; Hou, Hongshuai; Zou, Guoqiang; Ji, Xiaobo

doi:10.1016/j.nanoen.2022.107797

Cited by 55 publications

(22 citation statements)

References 63 publications

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“…Furthermore, the percentage of pseudo-capacitance contribution increases from 47.8 to 73.6% when the scan rate increases from 0.2 to 2.0 mV s –1 (Figure b), indicating that the pseudo-capacitance contribution of the Co@MXene electrode material increases monotonically with increasing scan rate. For 2D intercalated electrode materials like Ti 3 C 2 T x MXene, the capacitance contribution plays a key role at high scan rates . The high percentage of pseudo-capacitance contribution can be attributed to the 2D nanostructure of Co@MXene.…”

Section: Resultsmentioning

confidence: 99%

“…For 2D intercalated electrode materials like Ti 3 C 2 T x MXene, the capacitance contribution plays a key role at high scan rates. 69 The high percentage of pseudocapacitance contribution can be attributed to the 2D nanostructure of Co@MXene. The horizontal grain size of MXene is minimized by this method of alkali treatment, which greatly shortens the ion and electron transport paths.…”

Section: Electrochemical Performancementioning

confidence: 99%

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Electrostatics and Chemistry Combination Divalent Cobalt Ions and Alkali-Treated MXene for High-Performance Lithium-Ion Batteries

Xiao

Zhang

et al. 2022

Energy Fuels

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To break through the drawback of the low capacity of graphite as an anode material for lithium-ion batteries (LIBs), the development of novel electrode materials is crucial for highperformance LIBs. Recently, MXene with a two-dimensional nanosheet structure has attracted extensive attention due to its numerously exposed lithium storage sites and shortened transport paths as well as superior conductivity. Here, the Co-doped MXene (Co@MXene) composite-based anode for LIBs was prepared using alkali-treated MXene matrix and Co ions through electrostatic adsorption under relatively mild conditions, delivering excellent reversible capacity (1283.2 mA h g −1 at 0.1 A g −1 after 120 cycles) and long-term stability (349.4 mA h g −1 at 1 A g −1 after 1000 cycles). Impressively, the preparation of anodes in a simple method and under moderate operating conditions is superior to the conventional preparation approach, which facilitates practical applications. This work provides ideas for the design of advanced LIB anode materials with quick reaction kinetics, presenting tremendous potential in electrochemical energy storage applications.

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Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Performancementioning

confidence: 99%

Electrostatics and Chemistry Combination Divalent Cobalt Ions and Alkali-Treated MXene for High-Performance Lithium-Ion Batteries

Xiao

Zhang

et al. 2022

Energy Fuels

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“…The components’ characteristic peaks of C–C (850 cm –1 , 872 cm –1 ) in PDO and C–N (717 cm –1 ) and C–H (3032 cm –1 ) in ChCl coexist in ILA 4:1 , ILA 6:1 , and ILA 8:1 (Figure S1a), , indicating the formation of ILAs due to H-bond interaction at 3000–3600 cm –1 ; the O–H vibrations in Raman spectra can be divided into three parts: strong H-bonds, weak H-bonds, and non-H-bonds. ,− In our case, the position of the strong H-bonds in ChCl and PDO shifts to higher and lower wavenumbers, respectively (Figure S1b), confirming the variation of the chemical environment of H-bonds in ILAs. The electrochemical methods are employed to characterize the conductivity by monitoring the response current in CV and solution resistance ( R s , i.e., the value of the intersection of the high-frequency portion of the curve with the X -axis) in EIS. − The result of CV measurements indicates that the conductivity of ILAs decreases with the content of ChCl (Figure b); compared with ILA 6:1 and ILA 8:1 , ILA 4:1 presents the highest conductivity, which is confirmed by the smallest R s , as shown in Figure c. Therefore, ILA 4:1 was chosen as the base electrolyte to reveal the effect of IMZ additives.…”

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confidence: 94%

In Situ Raman Study of Voltage Tolerance Up to 2.2 V of Ionic Liquid Analogue Supercapacitor Electrolytes Immune to Water Adsorption Conferred by Amphoteric Imidazole Additives

Liang

Zhou

Shi

et al. 2023

J. Phys. Chem. Lett.

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Ionic liquid analogues (ILAs) are promising electrolytes for supercapacitors due to their low cost and considerable voltage (>2.0 V). However, the voltage is <1.1 V for water-adsorbed ILAs. Herein for the first time, an amphoteric imidazole (IMZ) additive is reported to address this concern by reconfiguring the solvent shell of ILAs. Addition of only 2 wt % IMZ increases the voltage from 1.1 to 2.2 V, with an increase in capacitance from 178 to 211 F g–1 and an increase in energy density from 6.8 to 32.6 Wh kg–1. In situ Raman reveals that the strong H-bonds formed by IMZ with completive ligands 1,3-propanediol and water induce a reversal of the polarity of the solvent shells, suppressing absorbed water electrochemical activity and thus increasing the voltage. This study solves the problem of low voltage for water-adsorbed ILAs and reduces the equipment cost of ILA-based supercapacitor assembly (e.g., assembly in air without a glovebox).

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“…Thus far, thousands of MOFs have been reported, including Materials of Institutes Lavoisier (MIL), Universiteit I Oslo (UIO), Zeolitic imidazolate framework (ZIFs), and Hong Kong University of Science and Technology (HKUST). Although these catalysts exhibit remarkable electrochemical performance, mostly pristine MOFs have associated with drawbacks such as inadequate stability, low conductivity, and poor activity [3,4,[7][8][9][10][11][12]. Therefore, developing a MOF catalyst with excellent conductivity and cycling stability is still a challenging task.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances and New Challenges: Two-Dimensional Metal–Organic Framework and Their Composites/Derivatives for Electrochemical Energy Conversion and Storage

Nivetha

Sharma

Jana

et al. 2023

International Journal of Energy Research

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Metal–organic frameworks (MOFs), as a new generation of intrinsically porous extended crystalline materials formed by coordination bonding between the organic ligands and metal ions or clusters, have attracted considerable interest in many applications owing to their high porosity, diverse structures, and controllable chemical structure. Recently, 2D transition-metal- (TM-) based MOFs have become a hot topic in this field because of their high aspect ratio derived from their large lateral size and small thickness, as well as the advantages of MOFs. Moreover, 2D TM-based MOFs can act as good precursors to construct heterostructures with high electrical conductivity and abundant active sites for a range of applications. This review comprehensively introduces the widely adopted synthesis strategies of 2D TM-based MOFs and their composites/derivatives. In addition, this paper summarizes and highlights the recent advances in energy conversion and storage, including the hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, CO2 reduction reaction, urea oxidation reaction, batteries, and supercapacitors. Finally, the challenges in developing these intriguing 2D layered materials and their composites/derivatives are examined, and the possible proposals for future directions to enhance the energy conversion and storage performance are reviewed.

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Ultrathin two-dimensional nanosheet metal-organic frameworks with high-density ligand active sites for advanced lithium-ion capacitors

Cited by 55 publications

References 63 publications

Electrostatics and Chemistry Combination Divalent Cobalt Ions and Alkali-Treated MXene for High-Performance Lithium-Ion Batteries

Electrostatics and Chemistry Combination Divalent Cobalt Ions and Alkali-Treated MXene for High-Performance Lithium-Ion Batteries

In Situ Raman Study of Voltage Tolerance Up to 2.2 V of Ionic Liquid Analogue Supercapacitor Electrolytes Immune to Water Adsorption Conferred by Amphoteric Imidazole Additives

Recent Advances and New Challenges: Two-Dimensional Metal–Organic Framework and Their Composites/Derivatives for Electrochemical Energy Conversion and Storage

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