Unraveling the reaction activity of Fe-based compounds toward potassium-ion storage

Mao, Ruofan; Li, Anpeng; Ma, Xiaolin; Song, Lulu; Dong, Fangyuan; Tang, Yuan; Chiou, Mong-Feng; Zhao, Yi

doi:10.1016/j.apsusc.2024.159786

Cited by 2 publications

(1 citation statement)

References 49 publications

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“…Figures a and S15 display the CV curves of hollow VS 4 /C/rGO, hollow VS 4 /C, and VS 4 /C between 0.2 and 2.0 mV/s. First, equation: i = k 1 v 1 / 2 + k 2 v can be used to quantify the portion of the pseudocapacitive section ( k 2 v ) and diffusion-regulated section ( k 1 v 1 / 2 ). , As shown in Figure b, the capacitive contents gradually improved as the scan rate was enhanced, and hollow VS 4 /C/rGO displayed the largest pseudocapacitive ratio in these composites. Figure S16 displays the CV curves and the fraction of capacitive behavior (colored region) at 2.0 mV s –1 , from which VS 4 /C, hollow VS 4 /C, and hollow VS 4 /C/rGO samples exhibit significant pseudocapacitive contributions of 64%, 74%, and 81%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Rational Conversion of V₂CT_x MXene into VS₄-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Song,

Tang,

Mao

et al. 2024

ACS Appl. Nano Mater.

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MXenes with unique physical and chemical properties have been extensively applied in various energy storage systems. Nevertheless, the limited capacity and instability of MXene hamper its practical applications in alkali-ion batteries. Herein, for the first time, V 2 CT x MXene is rationally converted into VS 4 -carbon composite, which is strategically engineered with a hollow morphological configuration and an integrated reduced graphene oxide (rGO) layer. Regarding potassium storage, the as-designed hollow VS 4 /C/rGO composite shows a capacity of 549 mA h/g at 0.1 A/g and durable cyclic behavior exceeding 2000 cycles at 1 A/g. What's more, this composite displays a remarkable capacity of 202 mA h/g at a high rate of 20 A/g, surpassing most V-based and MXene-based anodes. For sodium storage, it also manifests exceptional rate capability and long-term cycling life. As disclosed by kinetics analysis and ex-situ characterizations, the unique merits of the hollow structure, small VS 4 particles, and protective rGO coating are desirable for the good structural stability and fast charge transportation, thus accounting for the excellent battery performance of the V 2 CT x -derived hollow VS 4 /C/rGO composite.

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Section: Resultsmentioning

confidence: 99%

Rational Conversion of V₂CT_x MXene into VS₄-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Song,

Tang,

Mao

et al. 2024

ACS Appl. Nano Mater.

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Engineering conductive carbon networks within hollow structure: A wire-in-tube Co9S8/C@C composite for efficient K-ion storage

Zeng,

Tang,

et al. 2024

Applied Surface Science

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Unraveling the reaction activity of Fe-based compounds toward potassium-ion storage

Cited by 2 publications

References 49 publications

Rational Conversion of V₂CT_x MXene into VS₄-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Rational Conversion of V₂CT_x MXene into VS₄-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Engineering conductive carbon networks within hollow structure: A wire-in-tube Co9S8/C@C composite for efficient K-ion storage

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Unraveling the reaction activity of Fe-based compounds toward potassium-ion storage

Cited by 2 publications

References 49 publications

Rational Conversion of V2CTx MXene into VS4-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Rational Conversion of V2CTx MXene into VS4-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Engineering conductive carbon networks within hollow structure: A wire-in-tube Co9S8/C@C composite for efficient K-ion storage

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Rational Conversion of V₂CT_x MXene into VS₄-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

Rational Conversion of V₂CT_x MXene into VS₄-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage