Affiliation:
1. Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University Beijing 100084 China
2. Beijing Key Laboratory of Energy Conversion and Storage Materials Institution College of Chemistry Beijing Normal University Beijing 100875 China
3. Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State Chemistry University of Science and Technology Beijing Beijing 100083 China
Abstract
AbstractLi‐oxygen batteries have attracted much attention due to its ultra‐high theoretical specific capacity, but the discharge product Li2O2is easy to accumulate, leading to low battery stability. Here, we demonstrate a series of high‐efficiency cathode catalysts of Co3O4loaded with single‐atomic metals (M=Ru, Pd, Pt, Au, Ir). The single‐atomic metal could substitute the central Co atom in the octahedral coordination structure and maintain the structural stability; benefiting from the electron promoter effect, rendering more highly active Co3+exposed, providing rich nucleation sites for Li2O2deposition. And the loaded M atoms could separate the active Co3+centers, thereby regulating the dispersion of Li2O2to obtained a sheet‐like morphology, which could facilitate its decomposition in the subsequent charge cycle. Our work found that the single atoms could effectively modulate the active metal oxide with which it is coordinated, thus collectively boosting the catalytic performance.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Cited by
2 articles.
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