A facile method synthesizing marshmallow ZnS grown on Ti3C2 MXene for high-performance asymmetric supercapacitors

Zhang, Weiyi; Qi, Jiqiu; Cao, Tao; Lei, Zijian; Ma, Yaoguang; Líu, Hao; Zhu, Lei; Feng, Xiujuan; Wei, Wenqing; Zhang, Hao

doi:10.1016/j.est.2022.104652

Cited by 16 publications

(11 citation statements)

References 48 publications

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“…This holds the promise of good electrochemical performance of the device from the high current values observed from the CV curves. 22,23 Furthermore, CV curves retained their shape with a rise in scan rate to 150 mV/s, demonstrating remarkable reversibility and superior rate capability of the asymmetric cell. In addition to this, the GCD profiles shown in Figure 7b also show a similar pseudonature of the device with negligible IR drop.…”

Section: Chemical Analysismentioning

confidence: 88%

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

et al. 2023

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For high-energy-density supercapacitors, two-dimensional (2D) MXenes are being increasingly explored due to their inherent conductivity and excellent chemical properties. However, MXenes failed to achieve high power density and exceptional stability. Addressing this, we report the fabrication of an asymmetric supercapacitor with nickel MXene (cathode) and nitrogen (N), sulfur (S), and phosphorus (P) self-doped biomassderived activated carbon (anode). Detailed structural and chemical characterization studies reveal layered nanosheets in NiMX caused due to solvothermal etching cum exfoliation and unique micro− mesopore distribution in the optimized Euphorbia milii plant leafderived heteroatom self-doped activated carbon (EMAC-700) because of KOH activation. NiMX and EMAC-700 delivered high capacitances of 474.3 and 575.8 F/g, respectively, at 1 A/g with a 6 M KOH electrolyte. This is attributed to the pseudonature of NiMX and the presence of heteroatoms and the large surface area (2349 m 2 /g) of EMAC-700, facilitating fast electrolytic ion transfer. Finally, an asymmetric device with NiMX//EMAC configuration in 6 M KOH delivered a 152.6 F/g cell capacitance at 0.5 A/g under 0−1.5 V. Additionally, an ultrahigh energy density of 47.6 W h/kg at a 375 W/kg power density was achieved along with an 81.7% capacitance retention after 30,000 cycles at 15 A/g, signifying its potential for next-generation energy storage applications.

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Section: Chemical Analysismentioning

confidence: 88%

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

et al. 2023

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“…In order to enhance conductivity and mitigate volume changes during redox processes, the utilization of MXene as a substrate material provides sufficient buffer space and good conductive network for metal sulfides [11,103]. Recently, several metal sulfides, including CoS 2 , MoS 2 , NiS, ZnS and Ni-Co binary metal sulfide, have been combined with MXene materials to develop a range of high-performance composite electrode materials [104][105][106][107][108][109][110][111][112].…”

Section: Mxene/metal Sulfide Nanocompositesmentioning

confidence: 99%

Recent advances in MXene-based nanocomposites for supercapacitors

Yi,

Wang,

Zhang

et al. 2023

Nanotechnology

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MXene materials have become a competitive candidate for electrochemical energy storage due to their unique two-dimensional layered structure, high density, metal-like conductivity, fast ion intercalation, tunable surface terminal groups, and good mechanical flexibilities, showing unique application advantages in the field of supercapacitors. With widely research of MXene in energy storage applications, plenty of studies in synthesis strategies of MXene, including etching, intercalation and exfoliation processes, and its charge storage mechanism in supercapacitors have been conducted. However, the restacking of two-dimensional (2D) MXene nanosheets severely affects their electrochemical performance. To prevent the stacking of MXene, MXene-based nanocomposite electrode materials have been developed with remarkable electrochemical performance by incorporating conventional active capacitive materials, including metal oxides/sulfides and conductive polymers, with MXene. This review summarizes the etching strategies of MXenes and selection of intercalants, also discusses the charge storage mechanism of MXenes in aqueous and nonaqueous electrolytes. It mainly expounds the preparation strategies and applications of MXene-based nanocomposites in supercapacitors, including MXene/metal oxide, MXene/metal sulfide, MXene/conducting polymer, and MXene/carbon-based composites. Additionally, the advantages of combining MXene with other active materials in supercapacitor applications, which support its promising prospects, are discussed. Finally, the critical challenges faced by MXene-based nanocomposites in long-term research are mentioned.

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“…Compared with previous related reports, the novelty of ZnS/MXene composite materials proposed here lies in ultrafine ZnS size, uniform distribution, low-temperature fabrication, in situ growth on single-layer MXene nanosheets, membrane ability, and new application. [30,31] Based on the multifunctionality of ZnS/MXene, a strategy of "both considering cathode and anode sides" was proposed here to achieve shuttle-inhibition and dendrite-free Li-S batteries. The ZnS/MXene film could be used as a current collector for Li-metal anode.…”

Section: Introductionmentioning

confidence: 99%

In Situ Anchoring Ultrafine ZnS Nanodots on 2D MXene Nanosheets for Accelerating Polysulfide Redox and Regulating Li Plating

Wei

Wang

et al. 2023

Advanced Materials

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Lithium−sulfur (Li−S) battery is a promising energy storage system due to its cost effectiveness and high energy density. However, formation of Li dendrites from Li metal anode and shuttle effect of lithium polysulfides (LiPSs) from S cathode impede its practical application. Herein, ultrafine ZnS nanodots are uniformly grown on 2D MXene nanosheets by a low‐temperature (60 °C) hydrothermal method for the first time. Distinctively, the ZnS nanodot‐decorated MXene nanosheets (ZnS/MXene) can be easily filtered to be a flexible and freestanding film in several minutes. The ZnS/MXene film can be used as a current collector for Li‐metal anode to promote uniform Li deposition due to the superior lithiophilicity of ZnS nanodots. ZnS/MXene powders obtained by freeze drying can be used as separator decorator to address the shuttle effect of LiPSs due to their excellent adsorbability. Theoretical calculation proves that the existence of ZnS nanodots on MXene can obviously improve the adsorption ability of ZnS/MXene with Li+ and LiPSs. Li−S full cells with composite Li‐metal anode and modified separator exhibit remarkable rate and cycling performance. Other transition metal sulfides (CdS, CuS, etc.) can be also grown on 2D MXene nanosheets by the low‐temperature hydrothermal strategy.

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A facile method synthesizing marshmallow ZnS grown on Ti3C2 MXene for high-performance asymmetric supercapacitors

Cited by 16 publications

References 48 publications

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Nickel MXene Nanosheet and Heteroatom Self-Doped Porous Carbon-Based Asymmetric Supercapacitors with Ultrahigh Energy Density

Recent advances in MXene-based nanocomposites for supercapacitors

In Situ Anchoring Ultrafine ZnS Nanodots on 2D MXene Nanosheets for Accelerating Polysulfide Redox and Regulating Li Plating

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