Unleashing O3-Type Layered Cathode Capacity via Rb-Modulation for Advanced Sodium-Ion Batteries
Optimizing the Rb modulation strategy in O3-type NaNi<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> (NaNM) layered oxides addresses the practical challenges of phase transitions and slow ion diffusion, thereby unlocking near-theoretical capacity. Even with a minute 1% Rb doping, significant improvements in specific capacity and cycling stability are observed. The Na<sub>0.99</sub>Rb<sub>0.01</sub>Ni<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> (NaNMR-1) sample exhibits a reversible capacity of 235.1 mAh g<sup>-1</sup> at 0.2 C, maintaining 93.1% capacity retention after 100 cycles in a full cell configuration (NaNMR-1||HC). Theoretical calculations and comprehensive characterizations reveal that Rb decoration enhances Na<sup>+</sup> transport channels and strengthens TM-O bonds, substantially reducing the energy barrier for ion migration and improving structural reversibility. This study underscores the potential of this approach to significantly enhance the cycle stability and specific capacity of O3-type layered oxide cathodes, promising for high-performance sodium-ion batteries.
Authors
- Guangzhi Yang (ORCID: https://orcid.org/0000-0003-1811-2214)
- Zhe Fan (ORCID: https://orcid.org/0000-0002-0623-6909)
- Pengzhi Li (ORCID: https://orcid.org/0009-0005-4763-4320)
- Yuanyuan Ma (ORCID: https://orcid.org/0000-0002-0123-9422)
- Jian Qiu
- Shiyou Zheng
- Yuepeng Pang
- Shizhong Wang
- Wenqing Peng
- Miaomiao Jiang
- Tao Yuan
- Qunjian Huang
Institutions
- University of Shanghai for Science and Technology (CN)
- Donghua University (CN)
- Midea Group (China) (CN)
- Materials Modification (United States) (US)
- Ingenierie des Materiaux polymeres (FR)
Publication Details
- Journal
- ACS Nano
- Published
- 2026-01-21
- DOI
- https://doi.org/10.1021/acsnano.5c18471
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00