He, Lu; Huang, Jun; Chen, Yuhui published the artcile< First-Order or Second-Order? Disproportionation of Lithium Superoxide in Li-O2 Batteries>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is lithium superoxide battery.
The disproportionation of LiO2 to Li2O2 is a key step in Li-O2 batteries, and it is regarded as a second-order reaction. However, its mechanism is not well addressed, and its kinetics is rarely studied due to the difficulties of quantifying the rate constants, particularly for high concentrations of superoxide (>10 mM). Here, we quantified the kinetic rate constant by a microkinetic model using a microelectrode tip with a thin diffusion layer and fast response. We report that the reaction order of LiO2 transitions from 1 at high concentrations of superoxide (~20 mM) to 2 at low concentrations of superoxide (~1 mM). LiO2 is chem. reduced by free superoxides to form Li2O2 and O2, instead of reacting with another LiO2 via a disproportionation step. This chem.-reduction mechanism explained the change of reaction order and the kinetics profile. As a rate-determining step, this step restricts the overall kinetics of the discharging process and should be the focus of future catalyst design.
Journal of Physical Chemistry Letters published new progress about Lithium-ion secondary batteries. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics