Application of microelectrodes to the study of the Li, Li+ couple in ether solvents. Part 1

Optimization for electrochemical redox performance of Li+/Li couple based on steady-state polarization curve

“…Such typical steady-state polarization curve of Li-ion electroreduction operated on micro-disc Pt electrode was similar to previous studies [23,24]. As lithium metal deposited on foreign matrix, Pt, the reduction current started to arise at about -0.05 V because of over-potential of electro-crystallization.…”

“…Limiting mass transfer current plateau was observed in the potential scope of À0.58V$ À0.73 V and the steady-state limiting mass transfer current density, j lim s-s , was calculated as 0.52 AE 0.01 A cm À2 . Subsequently, the reduction current continuously increased as potential became more negative due to electrolyte decomposition [23], which would not be considered in this paper. In previous investigations, the steady-state polarization curve of Li + electroreduction was reported in either low viscosity pure carbonate electrolytes [23,24] or high viscosity polymer gel electrolytes [25].…”

“…Subsequently, the reduction current continuously increased as potential became more negative due to electrolyte decomposition [23], which would not be considered in this paper. In previous investigations, the steady-state polarization curve of Li + electroreduction was reported in either low viscosity pure carbonate electrolytes [23,24] or high viscosity polymer gel electrolytes [25]. The steady-state limiting mass transfer current, i lim s-s , and steadystate limiting mass transfer current density, j lim s-s , on micro-disc Pt electrode at support-salt free condition can be described as following equations, respectively [25,26]:…”

A High Electrode‐Reaction Rate for High‐Power‐Density Lithium‐Ion Secondary Batteries by the Addition of a Lewis Acid

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Lithium-ion secondary batteries using polymer electrolytes based on lithium-salt complexes of polyethers have attracted much attention because of their potential for practical applications, such as electric-, hybrid-, or fuel-cell vehicles. [2,5] Chronoamperometry was performed to obtain the exchange current densities. [2] Herein we describe a significant enhancement of the charge-transfer reaction rate by addition of Lewis acid to polymer electrolytes.

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“…[3] These results indicate that the activity of lithium ions in the polymer electrolytes increases on addition of the PEG-borate ester. [2,5] Chronoamperometry was performed to obtain the exchange current densities. [4] Herein, we investigate the influence of the PEG-borate ester on the electrokinetics of the Li + /Li couple in poly-(ethylene glycol) dimethyl ether (PEGDME) based electrolytes.…”