Investigating Element Composition of High-Entropy Layered Oxides: Insights on Performance Influence for Sodium-Ion Batteries
The application potential of layered oxides for sodium-ion batteries is expanded by the entropy stabilization strategy. However, specific research on the selection of elements and interpretation of the function of high-entropy materials are limited. In this study, we have developed several types of high-entropy materials, NaNi<sub>0.25</sub>Fe<sub>0.15</sub>Mn<sub>0.3</sub>Ti<sub>0.1</sub>Sn<sub>0.05</sub>Co<sub>0.05</sub>Li<sub>0.1</sub>O<sub>2</sub> (HEO-TS), NaNi<sub>0.25</sub>Fe<sub>0.15</sub>Mn<sub>0.3</sub>Ti<sub>0.05</sub>Sn<sub>0.1</sub>Co<sub>0.05</sub>Li<sub>0.1</sub>O<sub>2</sub> (HEO-ST), NaNi<sub>0.25</sub>Fe<sub>0.15</sub>Mn<sub>0.3</sub>Ti<sub>0.15</sub>Co<sub>0.05</sub>Li<sub>0.1</sub>O<sub>2</sub> (HEO-Ti), and NaNi<sub>0.25</sub>Fe<sub>0.15</sub>Mn<sub>0.3</sub>Sn<sub>0.15</sub>Co<sub>0.05</sub>Li<sub>0.1</sub>O<sub>2</sub> (HEO-Sn). Through the analysis of the physical and electrochemical properties, the introduction of Ti into the transition metal layer enhances air stability and rate performance. It exhibits excellent electrochemical properties under a high voltage. Furthermore, the partial introduction of Sn<sup>4+</sup> increases the voltage difference of redox potential and electrochemical polarization. When the transition metal layer contains a large amount of Sn, the material exhibits poor electrochemical properties and struggles to form high crystallinity cathode materials. This work provides a solution for the element design of high-entropy layered oxides and investigates the relationship between the elements and electrochemical properties.
Authors
- Ziya Zhang (ORCID: https://orcid.org/0000-0002-3576-5578)
- Xinyu Tang (ORCID: https://orcid.org/0000-0002-5711-7571)
- Mengdan Zhang
- Baopeng Li
- Hongyu Dong (ORCID: https://orcid.org/0000-0002-9878-3626)
- Shuting Yang (ORCID: https://orcid.org/0000-0001-7841-0016)
- Xiaojian Liu (ORCID: https://orcid.org/0000-0003-0160-7392)
- Xiangnan Li (ORCID: https://orcid.org/0000-0003-3660-6031)
- Yanhong Yin (ORCID: https://orcid.org/0000-0001-8853-9075)
Institutions
- Lithium Power (United States) (US)
- Henan Normal University (CN)
Publication Details
- Journal
- Langmuir
- Published
- 2025-10-02
- DOI
- https://doi.org/10.1021/acs.langmuir.5c03993
- Citations
- 1
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.73