In Situ Electrochemical Synthesis of MXenes without Acid/Alkali Usage in/for an Aqueous Zinc Ion Battery

Li, Xinliang; Li, Mian; Yang, Qi; Liang, Guojin; Huang, Zhaodong; Ma, Longtao; Wang, Donghong; Mo, Funian; Dong, Binbin; Huang, Qing; Chen, Zhi

doi:10.1002/aenm.202001791

Cited by 151 publications

(137 citation statements)

References 52 publications

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“…[ 39,40 ] On the other hand, this phenomenon may be due to the oxidation of transition metal V in V 2 CT x , and after oxidation, the electrochemical activity of V layers is fully activated and leads to excellent electrochemical performance. [ 41 ]…”

Section: Resultsmentioning

confidence: 99%

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO₂ Interpenetrated MXene V₂C Architecture as Anode Materials

Liu

Wang

et al. 2020

Energy Tech

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As an anode material, SnO2 nanoparticles have the problem of volume expansion and agglomeration, limiting their applications in energy storage. Herein, a nanocomposite material with hybridization structure using SnO2 interpenetrated MXene V2C as an anode for Li‐ion battery is fabricated by a simple method. The laminated structure of V2C can restrain the volume expansion of SnO2 nanoparticles anchored on the surface of V2C layers, whereas the intercalation of SnO2 nanoparticles into the V2CTx layer can effectively prevent the restacking of the V2CTx nanosheets in charging and discharging processes. This heterogeneous structure enables high Li‐ion storage on the surface and in the near‐surface region, which results in rapid transport of Li ions and optimizes the rate performance and cycling property. Consequently, the V2CTx@SnO2 nanocomposite has a large reversible capacity of ≈768 mAh g−1 after 200 cycles at a current density of 1000 mA g−1. Competitively, its reversible capacity can reach 260 mAh g−1 at high current density of 8000 mA g−1 after 1000 cycles, showing excellent cycling stability and superior rate capability. In addition to the high Li‐ion capacity offered by the composite structure, the anode also maintains the structural and mechanical integrity provided by MXene in charging and discharging processes.

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Section: Resultsmentioning

confidence: 99%

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO₂ Interpenetrated MXene V₂C Architecture as Anode Materials

Liu

Wang

et al. 2020

Energy Tech

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“…Reproduced with permission. [ 137 ] Copyright 2020, Wiley‐VCH. f) Schematic illustrating the adsorption of anions (SO 4 2− , Ac − , and Cl − ) on the (110) lattice plane of TiN during the charge process.…”

Section: Cathode Materialsmentioning

confidence: 99%

“…Zhi et al assemble a ZIB by using an F-rich electrolyte and a V 2 AlC cathode. [137] The Al atoms in the V 2 AlC cathode can be etched by an F-rich electrolyte (Figure 10d). Thus, the V 2 AlC cathode went through phase , c) GCD curves, and corresponding in situ XRD patterns of the graphite cathode.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Electrochemical Zinc Ion Capacitors: Fundamentals, Materials, and Systems

Yin

Zhang

Alhebshi

et al. 2021

Advanced Energy Materials

171

109

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An electrochemical zinc ion capacitor (ZIC) is a hybrid supercapacitor composed of a porous carbon cathode and a zinc anode. Based on the low‐cost features of carbon and zinc metal, ZIC is a potential candidate for safe, high‐power, and low‐cost energy storage applications. ZICs have gained tremendous attention in recent years. However, the low energy densities and limited cycling stability are still major challenges for developing high‐performance ZICs. First, the energy density of ZIC is limited by the low capacitance of porous carbon cathodes. Second, aqueous electrolytes induce parasitic reactions, which results in limited voltage windows and poor cycling performances of ZICs. Third, the poor stabilities and low utilization of zinc anodes remain major challenges to develop practical ZICs. This review summarizes the recent progress in developing ZICs and highlights both the promising and challenging attributes of this emerging energy storage technology. Future research directions are proposed for developing better, lower cost, and more scalable ZICs for energy storage applications.

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“…Meanwhile, the nanoscale interlayer galleries potentially confine the reaction products to suppress the common shuttle behavior. [ 22–29 ] Besides, the ceramic nature of MXenes is capable of buffering the inevitable volume change, hence escorting the composite electrode stably. [ 30–35 ] Therefore, MXene is expected to act as a nanoreactor to confine active I 2 elements and facilitate efficient redox reaction.…”

Section: Figurementioning

confidence: 99%

Enhanced Redox Kinetics and Duration of Aqueous I₂/I⁻ Conversion Chemistry by MXene Confinement

et al. 2021

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concerning active source leakage and shuttle effect should be addressed, as they result in a lack of carrier and backward loading processes. The insulating nature of elemental I 2 causes it to rely on conductive supporters (mostly porous carbon) to transport electrons and redox. However, the carbon materials currently confine I 2 solely by physical means including adsorption and impregnation, resulting in uneven loading and sluggish interactions, especially considering its electrical neutrality and large radius. [12,13] Another noticeable issue concerns the generation of polyiodides and the associated shuttle effect, which can lead to undesirable selfdischarge problems. [4] MXenes are represented with a general formula of M n+1 X n T x , where M represents the transition metal (Ti, Nb, Zr, Cr, etc.), X stands for C or N, and T x is the surficial termination. They are meant to be a more ideal new carrier for I 2 , due to their exceptional electrical conductivity, abundant surface terminations (O, F, OH, etc.), periodic layered microstructure, and arrayed interlayer gap. [14-21] Furthermore, the efficient electron transport of the MXene skeleton is believed to rescue the insulating active materials to achieve ultrafast reaction kinetics. Meanwhile, the nanoscale interlayer galleries potentially confine the reaction products to suppress the common shuttle behavior. [22-29] Besides, the ceramic nature of MXenes is capable of buffering the inevitable volume change, hence escorting the composite Weak binding and affinity between the conductive support and iodine species leads to inadequate electron transfer and the shuttle effect. Herein, redox kinetics and duration are significantly boosted by introducing a Nb 2 CT X host that is classified as a layered 2D Nb-based MXene. With a facile electrodeposition strategy, initial I − ions are electrically driven to insert in the nanosized interlayers and are electro-oxidized in situ. Linear I 2 is firmly confined inside and benefits from the rapid charge supply from the MXene. Consequently, an aqueous Zn battery based on a Zn metal anode and ZnSO 4 electrolyte delivers an ultraflat plateau at 1.3 V, which contributes to 84.5% of the capacity and 89.1% of the energy density. Record rate capability (143 mAh g −1 at 18 A g −1) and lifespan (23 000) cycles are achieved, which are far superior to those of all reported aqueous MXenes and I 2-metal batteries. Moreover, the low voltage decay rate of 5.6 mV h −1 indicates its superior anti-self-discharge properties. Physicochemical analyses and density functional theory calculations elucidate that the localized electron transfer and trapping effect of the Nb 2 CT X MXene host are responsible for enhanced kinetics and suppressed shuttle behavior. This work can be extended to the fabrication of other I 2-metal batteries with long-lifetime expectations. Aqueous halide iodine batteries, which transport electrons through the direct conversion reaction between an I 2 element and I − ions, are increasingly getting noticed for their cost-ef...

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In Situ Electrochemical Synthesis of MXenes without Acid/Alkali Usage in/for an Aqueous Zinc Ion Battery

Cited by 151 publications

References 52 publications

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO₂ Interpenetrated MXene V₂C Architecture as Anode Materials

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO₂ Interpenetrated MXene V₂C Architecture as Anode Materials

Electrochemical Zinc Ion Capacitors: Fundamentals, Materials, and Systems

Enhanced Redox Kinetics and Duration of Aqueous I₂/I⁻ Conversion Chemistry by MXene Confinement

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In Situ Electrochemical Synthesis of MXenes without Acid/Alkali Usage in/for an Aqueous Zinc Ion Battery

Cited by 151 publications

References 52 publications

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO2 Interpenetrated MXene V2C Architecture as Anode Materials

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO2 Interpenetrated MXene V2C Architecture as Anode Materials

Electrochemical Zinc Ion Capacitors: Fundamentals, Materials, and Systems

Enhanced Redox Kinetics and Duration of Aqueous I2/I− Conversion Chemistry by MXene Confinement

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Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO₂ Interpenetrated MXene V₂C Architecture as Anode Materials

Enhanced Reversible Capacity and Cyclic Performance of Lithium‐Ion Batteries Using SnO₂ Interpenetrated MXene V₂C Architecture as Anode Materials

Enhanced Redox Kinetics and Duration of Aqueous I₂/I⁻ Conversion Chemistry by MXene Confinement