Intercalation of Ca into a Highly Defective Manganese Oxide at Room Temperature
Source abstract
Abstract
The utilization of oxide frameworks as intercalation cathodes for nonaqueous Ca-ion batteries potentially unlocks a new energy-storage system that delivers high energy density. However, the slow kinetics of Ca2+ in oxide electrodes strongly handicaps their activity and reversibility at room temperature. Herein, nanocrystals of layered MnOx containing a high concentration of atomic defects and lattice water are shown to have remarkable electrochemical activity toward Ca2+, amounting to a capacity of ∼130 mAh/g at room temperature. Multimodal characterization revealed the notable degree of intercalation by probing the structural, compositional, and redox changes undertaken by the defective MnOx nanocrystals. The results suggest that the existence of atomic defects and lattice water played a role in improving Ca2+ diffusivity in the oxide. These outcomes reaffirm the prospects for functional Ca-ion batteries using oxide cathodes under moderate conditions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
Joint Center for Energy Storage Research, Argonne National Laboratory, Lemont, Illinois 60439, United States
X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
Department of Materials Science and Engineering, UC Berkeley, Berkeley, California 94720, United States
Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, United States
Funding
Basic Energy Sciences · Office of Science · National Science Foundation
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