A chemically pre-sodiated Na<sub>15</sub>Sn<sub>4</sub> interphase enables high-reversibility anode-less sodium-metal batteries
Anode-free batteries promise high energy density but suffer from dendrites, dead sodium, and cathode Na depletion that slow ion diffusion and charge transfer. We introduce the facile chemical pre-sodiation of Cu current collectors to form a Na<sub>15</sub>Sn<sub>4</sub>@Cu coating, which enhances Na affinity, supports uniform nucleation, and suppresses dendrites. <i>Operando</i> XRD confirms improved Na diffusion in NaNi<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub>, yielding markedly enhanced reversible capacity and cyclability for anode-less sodium-metal batteries.
Authors
- Yue Ma (ORCID: https://orcid.org/0000-0001-9473-8935)
- Liuyan Hou
- Ahu Shao
- Jiacheng Liu (ORCID: https://orcid.org/0000-0001-9040-8656)
- Helin Wang (ORCID: https://orcid.org/0000-0002-7059-4217)
- Helin Wang (ORCID: https://orcid.org/0000-0002-8202-7412)
- Jiawen Tang
Institutions
- Northwestern Polytechnical University (CN)
Publication Details
- Journal
- Chemical Communications
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5cc02976g
- Citations
- 2
- Primary Topic
- Advanced Battery Materials and Technologies
- Type
- article
- Field-Weighted Citation Impact
- 1.46