2026-05-28T19:37:34Zhttps://www.radar-service.eu/oai/OAIHandler

10.35097/14152023-11-15T14:46:00Zradar4kit

10.35097/1415 Wang, Kai Kai Wang Institut für Nanotechnologie, Helmholtz-Institut Ulm, Karlsruhe Nano Micro Facility, Center for Electrochemical Energy Storage Ulm & Karlsruhe Hua, Weibo Weibo Hua Energiespeichersysteme Huang, Xiaohui Xiaohui Huang Institut für Nanotechnologie Stenzel, David David Stenzel Institut für Nanotechnologie Wang, Junbo Junbo Wang Energiespeichersysteme Ding, Ziming Ziming Ding Institut für Nanotechnologie Cui, Yanyan Yanyan Cui Institut für Nanotechnologie Wang, Qingsong Qingsong Wang Institut für Nanotechnologie Ehrenberg, Helmut Helmut Ehrenberg Energiespeichersysteme Breitung, Ben Ben Breitung Institut für Nanotechnologie Kübel, Christian Christian Kübel 0000-0001-5701-4006 Institut für Nanotechnologie Mu, Xiaoke Xiaoke Mu Institut für Nanotechnologie Karlsruhe Institute of Technology 2022 2023 Engineering high-entropy oxide battery materials cation synergy size effect Open Access Creative Commons Attribution Non Commercial 4.0 International Wang, Kai Hua, Weibo Huang, Xiaohui Stenzel, David Wang, Junbo Ding, Ziming Cui, Yanyan Wang, Qingsong Ehrenberg, Helmut Breitung, Ben Kübel, Christian 0000-0001-5701-4006 Mu, Xiaoke High entropy oxides (HEOs) with chemically disordered multi-cation structure attract intensive interest as negative electrode materials for battery applications. The outstanding electrochemical performance is attributed to the high-entropy stabilization and so-called ‘cocktail effect’. However, the configurational entropy is insufficient to drive the structural reversibility of the room-temperature thermodynamically metastable HEO during conversion-type battery reaction, and the ‘cocktail effect’ has not been explained thus far. This work unveils the multi-cations synergy of the HEO Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O at atomic and nanoscale during electrochemical reaction and explains the ‘cocktail effect’. The more electronegative elements form an electrochemically inert 3-dimensional metallic nano-network enabling electron transport. The electrochemical inactive cation stabilizes an oxide nanophase, which is semi-coherent with the metallic phase and accommodates Li+ ions. This self-assembled nanostructure enables stable cycling of micron-sized particles, which bypasses the need for nanoscale pre-modification required for conventional metal oxides in battery applications. This demonstrates elemental diversity is the key for optimizing multi-cation electrode materials. Information about the data format and software suitable to open the data is available in the subdirectory 'description' 10.5445/IR/1000154295 application/x-tar