Investigation on Electrode/Electrolyte Interphase Reactions in Rechargeable Metal-Oxygen Batteries
EMSL Project ID
48379
Abstract
The objective of this proposal is to understand the reactions occurring at the electrode/electrolyte interphases in two metal-oxygen batteries, more specifically the interphases of lithium/electrolyte and air electrode/electrolyte in nonaqueous rechargeable lithium-oxygen (Li-O2) batteries and the interphases of zinc/electrolyte and air electrode/electrolyte in alkaline aqueous rechargeable zinc-oxygen (Zn-O2) batteries. In nonaqueous Li-O2 batteries, the studies include the investigations of (1) solid electrolyte interphase (SEI) components and compositions on Li anode surface and the mechanisms of Li dendrite formation/suppression in nonaqueous electrolytes with and without additives; (2) oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at different air electrode/electrolyte interphases and the stability of electrode and electrolyte. In alkaline aqueous Zn-O2 batteries, the studies include (1) the mechanisms of Zn dendrite formation/suppression through alloy formation from co-deposition in aqueous electrolytes with and without additives; (2) the effect of electrocatalytic compounds on the electrochemical reduction of ZnO to Zn at anode surface during charging process, and (3) the ORR and OER at different air electrode/electrolyte interphases in alkaline aqueous electrolytes and the comparison with those in nonaqueous electrolytes. This work is critical for the successful application of high energy storage systems of Li-air batteries and Zn-air batteries. All of the work is leveraged with the strong capabilities in PNNL including energy storage materials, characterizations and computational calculations.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2014-10-01
End Date
2016-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members