Direct Lithium Recovery from Aqueous Electrolytes with Electrochemical Ion Pumping and Lithium Intercalation.

In this mini-review, we provide an account of recent developments on electrochemical methods for the direct extraction of lithium (DEL) from natural brines, geothermal fluids, seawater, and battery recycling electrolytes by ion-pumping entropy cells. A critical discussion of selected examples with the LiMnO lithium intercalation battery cathode material is presented, with emphasis on the operation parameters, some experimental results and multiscale simulations, some limitations and challenges, and conditions for industrial scaleup.

Effect of porosity and active area on the assessment of catalytic activity of non-precious metal electrocatalyst for oxygen reduction.

We describe a method to study porous thin-films deposited onto rotating disc electrodes (RDE) applied to non-platinum group electrocatalyst obtained by pyrolysis of iron phthalocyanine and carbon, FePc/C. The electroactive area and porous properties of the thin film electrodes were obtained using electrochemical impedance spectroscopy under the framework of de Levie impedance model. The electrocatalytic activity of different electrodes was correlated to the total electroactive area () and the penetration ratio parameter through the film under ac current.

From single-biomolecule electrochemistry to biosensors and biofuel cells.

The bioelectrochemistry symposium at the 59th annual meeting of the International Society of Electrochemistry (ISE) covered significant developments in this area-from biomimetics, redox proteins, and enzymes, to biosensors and biofuel-cell applications. This conference report highlights some of the most important contributions (the picture shows a schematic representation of an amperometric enzyme electrode, courtesy of P.N.