Achieving Superior Cyclability Pouch Cells with Oxygen Vacancy-Moderated P′2/P3 Hybrid Layered Sodium Cathode Materials
Layered P2-type sodium manganese oxide has emerged as a promising cathode candidate for sodium-ion batteries due to its appealing cost-effectiveness and high discharge voltage. However, its practical capacity within the voltage range of 2.0-4.0 V (vs Na<sup>+</sup>/Na) is relatively low, and its rate capability is hampered by the adverse charge/vacancy ordering during charge/discharge. In this study, a layered P'2/P3 mixed-phase Na<sub>0.8-<i>a</i></sub>Mn<sub>0.675</sub>Ni<sub>0.225</sub>Li<sub>0.1</sub>O<sub>2-<i>x</i></sub> cathode with high (003) crystal plane intensity was designed by introducing oxygen vacancies to P2-structured materials. Aided by these advantages, the hybrid cathode material demonstrates impressive structural and thermal stability and faster Na-ion diffusion kinetics compared to a regular P2 material. Half-cell shows an initial discharge capacity retention of 101 mA h/g at 12 mA/g and 92.25% retention after 500 cycles at 120 mA/g. In combination with a hard carbon anode, the 0.5 A h pouch cell achieved a prevailing capacity retention of 95.2% after 2600 cycles at 36 mA/g. This work opens new dimensions for layered cathode materials with the aim of achieving superior cyclabilities.
Authors
- Haoxiang Zhuo (ORCID: https://orcid.org/0000-0002-5648-7503)
- Guoyao Pang
- Dongniu Wang (ORCID: https://orcid.org/0000-0002-9364-2840)
- Biwei Xiao (ORCID: https://orcid.org/0000-0001-7750-8855)
- Chenxiang Li
- Guozhuang Liu
- Dongsheng Geng (ORCID: https://orcid.org/0000-0003-0910-8985)
- Qian Li (ORCID: https://orcid.org/0000-0003-0255-4835)
- Meng Li (ORCID: https://orcid.org/0000-0002-7689-8668)
- Xuan Yang (ORCID: https://orcid.org/0000-0001-8750-0742)
- Kuan Wang (ORCID: https://orcid.org/0000-0002-7406-2867)
- Zhou Liao
- Hui Zhang (ORCID: https://orcid.org/0000-0003-1520-2433)
Institutions
- Chinese Academy of Sciences (CN)
- Nanjing University of Information Science and Technology (CN)
- China Automotive Battery Research Institute (CN)
- Shanghai Advanced Research Institute (CN)
- National Institute of Clean and Low-Carbon Energy (CN)
- Grinm Advanced Materials (China) (CN)
- Shanghai Institute of Microsystem and Information Technology (CN)
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2024-08-22
- DOI
- https://doi.org/10.1021/acsami.4c07264
- Citations
- 9
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 1.88
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Guangdong Province
- Ministry of Industry and Information Technology of the People's Republic of China
- GLABAT Solid-State Battery