Recent Advances in Perovskite‐Type Oxides for Energy Conversion and Storage Applications

Abstract

Professor John B. Goodenough started his research on perovskite‐type oxides working on random‐access memory with ceramic [La,M(II)]MnO3 in the Lincoln Laboratory, Massachusetts Institute of Technology, more than 60 years ago. Since then perovskite‐type oxides have played vital roles in the field of energy conversion and storage. In this review, a brief overview is given on the structure, defect chemistry, and transport properties of perovskite oxides, especially the mixed‐valent materials with mixed electronic and ionic conductivities. The recent advances of perovskite oxides applications in the oxygen reduction reaction, oxygen evolution reaction, electrochemical water splitting reaction, metal–air batteries, solid‐state batteries, oxygen separation membranes, and solid oxide fuel cells are highlighted. Moreover, some novel design strategies for optimizing performance, like interface engineering, defect engineering, strain modulation are discussed as well. Finally, a perspective is given on how to design high‐performance perovskite oxide based materials for energy conversion and storage applications as well as the challenges involved in this task.

Efficient oxygen reduction reaction by a highly porous, nitrogen-doped carbon sphere electrocatalyst through space confinement effect in nanopores

“…However, their high cost, poor methanol tolerance, and relatively low stability have prevented the large scale applications of fuel cells. Thus, the development of precious-metal-free (PGM-free) electrocatalysts of low cost with comparable or even better ORR performance than Pt-based electrocatalysts could overcome these difficulties [5,6] allowing widespread applications of fuel cells [7,8] and metal-air batteries [9][10][11].…”

How oxidation state and lattice distortion influence the oxygen evolution activity in acid of iridium double perovskites

“…In this sense, mixed oxides are promising candidates to replace pure iridium oxides as electrocatalysts for the OER. [14][15][16][17] For instance, the mass percentage of Ir in IrO 2 is 86 wt%, and goes down to 59 wt% in SrIrO 3 and 36-38 wt% in Sr 2 MIrO 6 , if M is a rst-row transition metal. To the best of our knowledge, the iridium mixed oxides with OER activity in acid electrolyte reported so far are: (i) Ir-based perovskites such as SrIrO 3 /IrO x thin lms, 18,19 SrCo 0.9 Ir 0.1 O 3 , 20 Ba 2 RIrO 6 (R ¼ Y, La, Ce, Pr, Nd, Tb), 21,22 In this work, we aim at establishing sound correlations between representative structural parameters of Ir perovskites, namely IrO 6 Oh distortion and Ir oxidation state, and the strength of the metal-adsorbate bonds.…”

Embedded Growth of Li2O2 Achieved by a Rational Designed Three‐Dimensional Fe2O3@CNS‐CNTs Sandwich Structure for Improving the Performance of Li–O2 Batteries

“…The nonaqueous lithium–oxygen (Li–O 2 ) battery system has attracted increasing attention in academic fields due to its ultrahigh theoretical energy density (3505 Wh kg −1 ), which displays unprecedented potential to meet the growing energy demand of electronic devices. [ 1–3 ] In a rechargeable Li–O 2 battery, the reversible formation and decomposition of lithium peroxide (Li 2 O 2 ) take place on the cathode during oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) processes, respectively, according to the reaction 2Li + + 2e − + O 2 ↔ Li 2 O 2 . [ 4–6 ] However, the multiphase interface characteristic of the electrochemical reactions and the intrinsically insulating property of Li 2 O 2 discharge products render the sluggish kinetics of ORR and OER, which makes the Li–O 2 battery suffer from poor performances such as high overpotential, low rate capability, and poor cycling stability.…”