Accession Number:

AD1105842

Title:

Uncovering and controlling the mechanisms of surface chemical and electrochemical stability on perovskite oxides

Descriptive Note:

Technical Report,30 Sep 2016,29 Sep 2019

Corporate Author:

MASSACHUSETTS INSTITUTE OF TECHNOLOGY CAMBRIDGE United States

Personal Author(s):

Report Date:

2020-01-10

Pagination or Media Count:

52.0

Abstract:

Understanding the effects of surface composition, gas environment, and high temperatures on the oxygen exchangekinetics of functional perovskite oxides is essential to ensure high long-term stability for their applications in energytechnology and electronics. In this project, we have focused on the surface processes underlying one of their maindegradation mechanisms high-temperature surface segregation of dopants, leading to the formation inactive surfacephase. Based on the understanding of the segregation mechanism, we have also investigated a way to remove suchsurface degradation by applying electrical polarization.

Subject Categories:

  • Electrochemical Energy Storage

Distribution Statement:

APPROVED FOR PUBLIC RELEASE