Comparison of organic electrolytes at various temperatures for 2.8 V–Li-ion hybrid supercapacitors

Shim, Hwirim; Budak, Öznil; Haug, Veronika; Widmaier, Mathias; Presser, Volker

doi:10.1016/j.electacta.2020.135760

Cited by 18 publications

(3 citation statements)

References 71 publications

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“…[46][47][48] The conductivity in MPN was also consistent with prior measurements for the LiClO 4 salt ($5.0 mS cm À1 at 20 C). 49 To the best knowledge of the authors, the results reported in this work are the rst MD simulations of ion transport in MPN-based electrolytes. Quantitatively, the simulated conductivity of MPN underestimates the experimental values and with a larger error than the carbonate-based systems.…”

Section: Resultsmentioning

confidence: 99%

Developing a nitrile-based lithium-conducting electrolyte for low temperature operation

Langevin

McGuire

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Developing a nitrile-based lithium-conducting electrolyte for low temperature operation

Langevin

McGuire

et al. 2022

J. Mater. Chem. A

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“…It is apparent that the selection of appropriate electrode materials as well as the lithium-containing salts/solvents can enhance the rate capability and cycle life of LICs. Although organic electrolytes provide larger voltage windows with possible higher specific energies, aqueous electrolytes are more advantageous in terms of safety, cost and conductivity [19,20].…”

Section: Introductionmentioning

confidence: 99%

Graphene‐functionalised Olivine Lithium Manganese Phosphate Derivatives for High Performance Lithium‐ion Capacitors

et al. 2020

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Lithium manganese phosphate nanoparticles (LiMnPO 4 ; LMP) as well as the nickel-doped (LMNP) and graphenised derivatives (G-LMNP) were synthesized. Electrochemical characteristics of the materials were examined using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. Lithium ion capacitors (LIC) fabricated using LMP and composite materials as positive electrodes and activated carbon as the negative electrode, exhibited a specific capacitance of 60 F g À 1 at a current load of 0.1 A g À 1 for the AC//G-LMNP LIC. Capacitance retention of 83 % was obtained by the AC//G-LMNP LIC after 750 cycles, with a high specific power of 19 kW kg À 1 at 0.5 A g À 1 .

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“…Despite its some drawbacks, such as volatility, flammability, and toxicity, acetonitrile (ACN) is still used in electrolyte solutions due its low viscosity and stability. Furthermore, room temperature IL or salt‐ACN binary system seems to have higher ionic conductivity 1,2 accompanied with increased diffusion 3 . At low temperatures, the supercapacitors with those type of electrolytes also show enhanced power density 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Not So Far, Not So Close: A Configurational Study of a Carbon Nanotube Bundle for Better Dielectric Phenomena

Orhan

2020

Bulletin Korean Chem Soc

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Size of pores or spacing among nano-protrusions such as nanotubes on an electrode surface greatly affects diffusive, viscous, and dielectric phenomena of electrolyte through openings. In this study, a configurational study was conducted to examine the effect of spacing among the single-walled carbon nanotubes on dielectric and viscous phenomena. Behavior of a polar liquid, acetonitrile, was investigated by molecular simulations at two low densities. Results show that viscosity of the liquid is greatly enhanced by interaction with closely packed tubes' bundle. In conjunction with such increase in viscosity, relaxation of dipoles takes longer times inside such closed packed bundle. Most importantly, spacing among the tubes with diameter D should be at about D/2 in a direction for better dielectric phenomena.

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Comparison of organic electrolytes at various temperatures for 2.8 V–Li-ion hybrid supercapacitors

Cited by 18 publications

References 71 publications

Developing a nitrile-based lithium-conducting electrolyte for low temperature operation

Developing a nitrile-based lithium-conducting electrolyte for low temperature operation

Graphene‐functionalised Olivine Lithium Manganese Phosphate Derivatives for High Performance Lithium‐ion Capacitors

Not So Far, Not So Close: A Configurational Study of a Carbon Nanotube Bundle for Better Dielectric Phenomena

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