Solvation and Complex Formation of Ions and Behavior of Electrolytes

doi:10.1002/9783527629152.ch2

Cited by 3 publications

(1 citation statement)

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“…The high propensity of lithium-ion to form ion pairs or ionic aggregates results in a low free lithiumion concentration and low ionic conductivity in a solid conductor. [37][38][39] Metal oxide-based fillers favor ion-pair dissociation, though dispersion of the filler through directional channel damages the energy density and introduces new challenges. 40,41 Integration of ionic scaffolds into the covalent or metal-organic frameworks or polymer base SSEs is reported to improve the lithium-ion conductivity by favoring the ion-pair dissociation.…”

Section: Introductionmentioning

confidence: 99%

Self-assembled cationic organic nanosheets: role of positional isomers in a guanidinium-core for efficient lithium-ion conduction

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Self-assembled cationic organic nanosheets: role of positional isomers in a guanidinium-core for efficient lithium-ion conduction

et al. 2021

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Stable Li Metal–Electrolyte Interface Enabled by SEI Improvement and Cation Shield Functionality of the Azamacrocyclic Ligand in Carbonate Electrolytes

Lee

Leem

et al. 2022

ACS Appl. Mater. Interfaces

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To promote the reversible cycleability of Li metal negative electrodes, a Li-chelating azamacrocyclic ligand molecule is introduced into a carbonate-based electrolyte intended for lithium metal batteries. Reversible Li plating and stripping on the Cu electrode are found to be the outcomes of the bifunctional effects of adding the lithium nitrate-chelating azamacrocyclic ligand. The negatively shifted redox potential of the Li-chelating macrocyclic ligand, relative to that of the free Li-ion, acted as a cationic shielding molecule for smooth Li deposition, and the Li3N-based solid electrolyte interphase (SEI) film derived from the nitrate anion strengthened the interphasial characteristics of the Li metal negative electrode. Cationic shielding and Li3N-based SEI composition could help enhance the cycleability of the Li metal in a cascading manner. Consequently, the physicochemical characteristics of the lithium nitrate-chelated 1,4,8,11-tetramethyl-1,4,8,11-tetraazacylcotetradecane molecule exhibit stable Li/LiNi0.8Co0.1Mn0.1O2 cycleability.

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Multielectron Cycling of a Low-Potential Anolyte in Alkali Metal Electrolytes for Nonaqueous Redox Flow Batteries

et al. 2017

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Recent efforts have led to the design of new anolytes for nonaqueous flow batteries that exhibit reversible redox couples at low potentials. However, these molecules generally cycle through just a single electron-transfer event, which limits the overall energy density of resulting batteries on account of the undesirably high equivalent weight (i.e., ratio of anolyte/supporting electrolyte molecular weight to electrons transferred). In addition, these anolytes generally require expensive alkylammonium salts as supporting electrolytes for stable cycling, which further increases the equivalent weight of the system. The current work describes the multielectron redox cycling of a low-potential anolyte using alkali metal salts as supporting electrolytes. These studies reveal that potassium hexafluorophosphate (KPF6) dramatically lowers the equivalent weight of the anolyte system while supporting flow cell cycling through two redox events at low potentials for 150 cycles with no detectable degradation.

show abstract

Solvation and Complex Formation of Ions and Behavior of Electrolytes

Cited by 3 publications

References 82 publications

Self-assembled cationic organic nanosheets: role of positional isomers in a guanidinium-core for efficient lithium-ion conduction

Self-assembled cationic organic nanosheets: role of positional isomers in a guanidinium-core for efficient lithium-ion conduction

Stable Li Metal–Electrolyte Interface Enabled by SEI Improvement and Cation Shield Functionality of the Azamacrocyclic Ligand in Carbonate Electrolytes

Multielectron Cycling of a Low-Potential Anolyte in Alkali Metal Electrolytes for Nonaqueous Redox Flow Batteries

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