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Unraveling the advances of trace doping engineering for potassium ion battery anodes via tomography

Journal Article · · Journal of Energy Chemistry
 [1];  [1];  [2];  [3];  [3];  [1];  [4];  [1];  [1];  [1];  [1]
  1. Harbin Institute of Technology (China)
  2. Bohai University, Jinzhou (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Xiamen Univ. of Technology (China)
Doping have been considered as a prominent strategy to stabilize crystal structure of battery materials during the insertion and removal of alkali ions. The instructive knowledge and experience acquired from doping strategies predominate in cathode materials, but doping principle in anodes remains unclear. Here, we demonstrate that trace element doping enables stable conversion-reaction and ensures structural integrity for potassium ion battery (PIB) anodes. With a synergistic combination of X-ray tomography, structural probes, and charge reconfiguration, we encode the physical origins and structural evolution of electro-chemo-mechanical degradation in PIB anodes. By the multiple ion transport pathways created by the orderly hierarchical pores from “surface to bulk” and the homogeneous charge distribution governed in doped nanodomains, the anisotropic expansion can be significantly relieved with trace isoelectronic element doping into the host lattice, maintaining particle mechanical integrity. Our work presents a close relationship between doping chemistry and mechanical reliability, projecting a new pathway to reengineering electrode materials for next-generation energy storage.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China; USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1813291
Journal Information:
Journal of Energy Chemistry, Journal Name: Journal of Energy Chemistry Vol. 58; ISSN 2095-4956
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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