Enhanced Li Al Ge (PO) Anode-Protecting Membranes for Hybrid Lithium-Air Batteries by Spark Plasma Sintering.

NASICON-type Li Al Ge (PO) (LAGP) is a promising electrolyte with high ionic conductivity (>10 S cm), excellent oxidation stability, and moderate sintering temperature. However, preparing dense LAGP pellets with high ionic conductivity is still challenging because of the hazards of dopant loss and partial decomposition on conventional sintering. Here, spark plasma sintering (SPS) of LAGP membranes is explored as a promising ultrarapid manufacturing technique, yielding dense electrolyte membranes.

Determining Li-Coupled Redox Targeting Reaction Kinetics of Battery Materials with Scanning Electrochemical Microscopy.

The redox targeting reaction of Li-storage materials with redox mediators is the key process in redox flow lithium batteries, a promising technology for next-generation large-scale energy storage. The kinetics of the Li-coupled heterogeneous charge transfer between the energy storage material and redox mediator dictates the performance of the device, while as a new type of charge transfer process it has been rarely studied. Here, scanning electrochemical microscopy (SECM) was employed for the first time to determine the interfacial charge transfer kinetics of LiFePO/FePO upon delithiation and lithiation by a pair of redox shuttle molecules FcBr and Fc.