Engineering the Interlayer Spacing by Pre‐Intercalation for High Performance Supercapacitor MXene Electrodes in Room Temperature Ionic Liquid (Adv. Funct. Mater. 33/2021)

Liang, Kun; Matsumoto, Ray A.; Zhao, Wei; Osti, Naresh C.; Попов, И. И.; Thapaliya, Bishnu P.; Fleischmann, Simon; Misra, Sudhajit; Tyagi, Madhusudan; Mamontov, Eugene; Augustyn, Veronica; Unocic, Raymond R.; Sokolov, Alexei P.; Dai, Sheng; Cummings, Peter T.; Naguib, Michael

doi:10.1002/adfm.202170246

Cited by 8 publications

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“…The f-Mo 2 Ti 2 C 3 exhibited a continuous increase in the ratio of capacitive contribution with the increase in the scan rates from 5 to 200 mV s –1 ( Figure 5 f), indicating fast capacitive response at all scan rates, which is beneficial for achieving high power density. 9 …”

Section: Results and Discussionmentioning

confidence: 99%

“…Using larger ions of organic electrolytes (0.65–1.3 nm) or ionic liquids (0.75–1.4 nm) impedes their intercalation and transportation between the layers of MXenes, limiting the specific capacitance and rate capability compared to smaller size aqueous electrolytes. 9 Although potassium-ion intercalation between the MXene sheets expanded the interlayer spacing from 0.2 to 0.77 nm, they are still relatively smaller than the ions of nonaqueous electrolytes. Therefore, research and publications on high performance supercapacitors enabled by MXenes are scarce in organic and ionic liquid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…This structural factor restricts the intercalation of EMIM + ions between the layers. 9 Some work shows the thickness of the Ti 3 C 2 MXene monolayer flake of 2.7 nm and the interlayer spaces between MXene sheets of 1 to 1.5 nm. 12 Although these values are larger than that of 2D graphene, they are still too small for the better intercalation of nonaqueous ions.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, their advantage of engineering MXene interlayer spacings has not been well utilized. Using larger ions of organic electrolytes (0.65–1.3 nm) or ionic liquids (0.75–1.4 nm) impedes their intercalation and transportation between the layers of MXenes, limiting the specific capacitance and rate capability compared to smaller size aqueous electrolytes . Although potassium-ion intercalation between the MXene sheets expanded the interlayer spacing from 0.2 to 0.77 nm, they are still relatively smaller than the ions of nonaqueous electrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…However, the specific capacitance and specific energy are pretty low due to their smaller interlayer spacing ( d -spacing) and limited surface area of the delaminated sheet. This structural factor restricts the intercalation of EMIM + ions between the layers . Some work shows the thickness of the Ti 3 C 2 MXene monolayer flake of 2.7 nm and the interlayer spaces between MXene sheets of 1 to 1.5 nm .…”

Section: Introductionmentioning

confidence: 99%

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Advantage of Larger Interlayer Spacing of a Mo₂Ti₂C₃ MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Gandla

Zhang

2022

ACS Omega

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MXenes show outstanding specific capacitance in aqueous electrolytes. However, the narrow potential window of aqueous electrolytes restrains the energy density. Ionic liquid electrolytes can provide a higher potential window and superior specific energy but are subject to slow ion transport and difficult intercalation for their larger ion size. It is desirable to explore larger interlayer-spaced ( d -spaced) MXenes that can facilitate the large ion intercalation–deintercalation process. This work reports the first-ever supercapacitor application of the Mo 2 Ti 2 C 3 MXene free-standing film electrode (f-Mo 2 Ti 2 C 3 ) using 1 M 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)-imide (EMIMTFSI) in acetonitrile electrolyte. Without any preintercalating agents, the authors achieved an interlayer spacing of ∼2.4 nm in the f-Mo 2 Ti 2 C 3 material through etching, followed by a vacuum-assisted filtration technique. The microstructure, electrochemical properties, and charge storage kinetics of the f-Mo 2 Ti 2 C 3 outperform the conventional f-Ti 3 C 2 T x . The f-Mo 2 Ti 2 C 3 -based symmetric two-electrode device exhibited remarkable specific energy and specific power of 188 Wh kg –1 and 22 kW kg –1 , respectively, along with a high specific capacitance of 152 F g –1 . This larger d -spaced f-Mo 2 Ti 2 C 3 can emerge as a better alternative to the conventional f-Ti 3 C 2 T x in ionic liquid electrolytes to design next-generation high-performance MXene supercapacitors.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Advantage of Larger Interlayer Spacing of a Mo₂Ti₂C₃ MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Gandla

Zhang

2022

ACS Omega

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Ten Years of Progress in the Synthesis and Development of MXenes

2021

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Since their discovery in 2011, the number of 2D transition metal carbides and nitrides (MXenes) has steadily increased. Currently more than 40 MXene compositions exist. The ultimate number is far greater and in time they may develop into the largest family of 2D materials known. MXenes’ unique properties, such as their metal‐like electrical conductivity reaching ≈20 000 S cm−1, render them quite useful in a large number of applications, including energy storage, optoelectronic, biomedical, communications, and environmental. The number of MXene papers and patents published has been growing quickly. The first MXene generation is synthesized using selective etching of metal layers from the MAX phases, layered transition metal carbides and carbonitrides using hydrofluoric acid. Since then, multiple synthesis approaches have been developed, including selective etching in a mixture of fluoride salts and various acids, non‐aqueous etchants, halogens, and molten salts, allowing for the synthesis of new MXenes with better control over their surface chemistries. Herein, a brief historical overview of the first 10 years of MXene research and a perspective on their synthesis and future development are provided. The fact that their production is readily scalable in aqueous environments, with high yields bodes well for their commercialization.

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Fundamentals and Scientific Challenges in Structural Design of Cathode Materials for Zinc‐Ion Hybrid Supercapacitors

Javed

Najam

Hussain

et al. 2022

Advanced Energy Materials

112

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One of the most exciting new developments in energy storage technology is Zn‐ion hybrid supercapacitors (ZHSCs). ZHSCs combine Zn‐ion batteries with supercapacitors (SCs) to address the energy and power needs of portable devices and electric automobiles. Low energy density and the development of cathode material are significant issues for ZHSCs. This review provides an in‐depth investigation of charge storage mechanisms from SCs to ZHSCs. The advantages/disadvantages of ZHSCs, the recent development of cathode materials, and the new design for device fabrications are critically summarized. New cathode materials should be developed to achieve high energy density while preserving the inherent power capability and stability. People increasingly engage with smart electronic and hybrid gadgets, demanding flexible, resilient, and highly safe energy storage devices. ZHSC has emerged as a complete alternative to risky sodium‐ion/lithium‐ion technologies. An overview of all reported carbon‐based, biomass‐derived carbons, metal oxides, MOFs, COFs, MXenes, graphene, and composite materials employed for ZHSCs is comprehensively provided. Furthermore, cathode materials for flexible, micro, wire‐shaped, printed, and photo‐rechargeable ZHSCs are also examined with their practical challenges. This review is anticipated to offer valuable recommendations for designing and manipulating cathode materials for high‐performance ZHSCs to achieve real‐world applications.

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Engineering the Interlayer Spacing by Pre‐Intercalation for High Performance Supercapacitor MXene Electrodes in Room Temperature Ionic Liquid (Adv. Funct. Mater. 33/2021)

Cited by 8 publications

References 0 publications

Advantage of Larger Interlayer Spacing of a Mo₂Ti₂C₃ MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Advantage of Larger Interlayer Spacing of a Mo₂Ti₂C₃ MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Ten Years of Progress in the Synthesis and Development of MXenes

Fundamentals and Scientific Challenges in Structural Design of Cathode Materials for Zinc‐Ion Hybrid Supercapacitors

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Engineering the Interlayer Spacing by Pre‐Intercalation for High Performance Supercapacitor MXene Electrodes in Room Temperature Ionic Liquid (Adv. Funct. Mater. 33/2021)

Cited by 8 publications

References 0 publications

Advantage of Larger Interlayer Spacing of a Mo2Ti2C3 MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Advantage of Larger Interlayer Spacing of a Mo2Ti2C3 MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Ten Years of Progress in the Synthesis and Development of MXenes

Fundamentals and Scientific Challenges in Structural Design of Cathode Materials for Zinc‐Ion Hybrid Supercapacitors

Contact Info

Product

Resources

About

Advantage of Larger Interlayer Spacing of a Mo₂Ti₂C₃ MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte

Advantage of Larger Interlayer Spacing of a Mo₂Ti₂C₃ MXene Free-Standing Film Electrode toward an Excellent Performance Supercapacitor in a Binary Ionic Liquid–Organic Electrolyte