New Concepts in Electrolytes

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(14), P. 6783 - 6819

Published: Feb. 5, 2020

Over the past decades, Li-ion battery (LIB) has turned into one of most important advances in history technology due to its extensive and in-depth impact on our life. Its omnipresence all electric vehicles, consumer electronics grids relies precisely tuned electrochemical dynamics interactions among electrolytes diversified anode cathode chemistries therein. With consumers' demand for performance ever increasing, more stringent requirements are being imposed upon established equilibria these LIB components, it became clear that state-of-the-art electrolyte systems could no longer sustain desired technological trajectory. Driven by such gap, researchers started explore unconventional systems. From superconcentrated solvent-in-salt solid-state electrolytes, current research realm novel grown unprecedented levels. In this review, we will avoid discussions but instead focus exclusively represent new concepts.

Language: Английский

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Molecular Dynamics Simulations of Ionic Liquids and Electrolytes Using Polarizable Force Fields

Chemical Reviews, Journal Year: 2019, Volume and Issue: 119(13), P. 7940 - 7995

Published: May 29, 2019

Many applications in chemistry, biology, and energy storage/conversion research rely on molecular simulations to provide fundamental insight into structural transport properties of materials with high ionic concentrations. Whether the system is comprised entirely ions, like liquids, or a mixture polar solvent salt, e.g., liquid electrolytes for battery applications, presence ions these results strong local electric fields polarizing molecules large ions. To predict such systems from often requires either explicit mean-field inclusion influence polarization electrostatic interactions. In this manuscript, we review pros cons different treatments ranging approaches most popular models dynamics materials. For each method, discuss their advantages disadvantages emphasize key assumptions as well adjustable parameters. Strategies development polarizable are presented specific focus extracting atomic polarizabilities. Finally, compare using nonpolarizable several classes systems, discussing underlying physics that approach includes ignores, implications implementation computational efficiency, accuracy predicted by methods compared experiments.

Language: Английский

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Recent Progress of Rechargeable Batteries Using Mild Aqueous Electrolytes

Small Methods, Journal Year: 2018, Volume and Issue: 3(1)

Published: Sept. 19, 2018

Abstract Given the low cost, ease of fabrication, high safety, and environmental‐friendly characteristics, aqueous rechargeable batteries using mild solutions as electrolytes (pH is close to 7) a monovalent/multivalent metal ion charge carrier, are attracting extensive attention for energy storage. However, accompanied by advantages electrolyte mentioned above, there some challenges that stand in way development these batteries, such narrow stable electrochemical window water, instability electrode materials, undesired side reactions, etc. In recent years, massive effort devoted overcoming drawbacks, encouraging works have arisen. this review, latest advances materials based on monovalent (Li + , Na K ) multivalent (Zn 2+ Mg Ca Al 3+ briefly reviewed.

Language: Английский

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Uncharted Waters: Super-Concentrated Electrolytes

Joule, Journal Year: 2020, Volume and Issue: 4(1), P. 69 - 100

Published: Jan. 1, 2020

Language: Английский

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Safe and high-rate supercapacitors based on an “acetonitrile/water in salt” hybrid electrolyte

Energy & Environmental Science, Journal Year: 2018, Volume and Issue: 11(11), P. 3212 - 3219

Published: Jan. 1, 2018

An “acetonitrile/water in salt” electrolyte with non-flammability, high conductivity, a stability window and wide applicable temperature range enables high-performance supercapacitors.

Language: Английский

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A low-cost “water-in-salt” electrolyte for a 2.3 V high-rate carbon-based supercapacitor

Journal of Materials Chemistry A, Journal Year: 2019, Volume and Issue: 7(13), P. 7541 - 7547

Published: Jan. 1, 2019

With the advantages including wide ESW, superior conductivity, low viscosity and cost, NaClO₄-based WIS electrolyte can be considered as a promising candidate for high-voltage high-rate aqueous carbon based SCs with good safety.

Language: Английский

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A Room‐Temperature Molten Hydrate Electrolyte for Rechargeable Zinc–Air Batteries

Advanced Energy Materials, Journal Year: 2019, Volume and Issue: 9(22)

Published: April 16, 2019

Abstract Aqueous Zn‐based batteries are attracting extensive interest because of their economic feasibility and potentially high energy density. However, poor rechargeability Zn anode in conventional electrolytes resulting from dendrite formation self‐corrosion hinders practical implementation. Herein, a molten hydrate composed inorganic salt water is demonstrated as an advantageous electrolyte for solving these issues. In this electrolyte, dendrite‐free deposition/dissolution reaction with Coulombic efficiency (≈99%) well long‐term stability, free CO 2 poisoning realized. The resultant Zn–air cell exhibits reversible capacity 1000 mAh g (catalyst) −1 over 100 cycles at 30 °C. Combined the intrinsic safety associated aqueous chemistry cost benefit raw material, present battery makes strong candidate large‐scale storage.

Language: Английский

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Recent development of ionic liquid-based electrolytes in lithium-ion batteries

Journal of Power Sources, Journal Year: 2022, Volume and Issue: 542, P. 231792 - 231792

Published: June 30, 2022

Language: Английский

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Perspective on High‐Energy Carbon‐Based Supercapacitors

Energy & environment materials, Journal Year: 2020, Volume and Issue: 3(3), P. 286 - 305

Published: July 4, 2020

Supercapacitors based on carbon materials have advantages such as high power density, fast charging/discharging capability, and long lifetime stability, playing a vital role in the field of electrochemical energy storage technologies. To further expand practical applications carbon‐based supercapacitors, their which is essentially determined by specific capacitance operating voltage, should be improved. This review provides fundamental knowledge achieving density supercapacitors. We first address relationship features materials, surface area, pore size distribution, functional groups, with performances, gravimetric volumetric capacitance, pseudocapacitance, voltage. Then, we discuss properties electrolytes from non‐aqueous aqueous to hybrid one thermodynamic kinetic aspects, present effects Finally, illustrate different cell design strategies basic principles for increasing also highlight recent advances related these fields provide our insight into high‐energy

Language: Английский

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Recent Developments on Molten Salt Synthesis of Inorganic Nanomaterials: A Review

The Journal of Physical Chemistry C, Journal Year: 2021, Volume and Issue: 125(12), P. 6508 - 6533

Published: Feb. 23, 2021

A wide range of inorganic nanomaterials with many fascinating properties and application potentials in widespread fields may be synthesized by wet chemical synthetic routes. To achieve scientific commercial viability uniformity scalability, it is necessary to develop efficient cost-effective, preferably sustainable, methods. The molten salt synthesis (MSS) method one such bottom-up technique fabricate a variety tunable size, morphology, surface characteristics. It also environmentally friendly, simple operate, easy scale, generalizable, etc. This review gives critical overview on this emerging rapidly developing for making defect free well-defined texture, surface, morphology at relatively low formation temperature. We have discussed its different aspects, including the role salts, choice electrochemical some advanced modifications conventional MSS technique, their implications. show most recent development nanomaterials, only encompasses studies reported over last six years (2015–2020). summarized technologically important families as metal oxides, fluorides, nitrides, silicides, chalcogenides, oxohalides, borides, carbides. Finally, few perspectives are highlighted. expected that will further attract scientists explore size- shape-tunable nanomaterials.

Language: Английский

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