Electrolyte Solvation Engineering Stabilizing Anode‐Free Sodium Metal Battery With 4.0 V‐Class Layered Oxide Cathode
Anode-free sodium metal batteries (AFSMBs) are regarded as the "ceiling" for current sodium-based batteries. However, their practical application is hindered by the unstable electrolyte and interfacial chemistry at the high-voltage cathode and anode-free side, especially under extreme temperature conditions. Here, an advanced electrolyte design strategy based on electrolyte solvation engineering is presented, which shapes a weakly solvating anion-stabilized (WSAS) electrolyte by balancing the interaction between the Na<sup>+</sup>-solvent and Na<sup>+</sup>-anion. The special interaction constructs rich contact ion pairs (CIPs) /aggregates (AGGs) clusters at the electrode/electrolyte interface during the dynamic solvation process which facilitates the formation of a uniform and stable interfacial layer, enabling highly stable cycling of 4.0 V-class layered oxide cathode from -40 °C to 60 °C and excellent reversibility of Na plating/stripping with an ultrahigh average CE of 99.89%. Ultimately, industrial multi-layer anode-free pouch cells using the WSAS electrolyte achieve 80% capacity remaining after 50 cycles and even deliver 74.3% capacity at -30 °C. This work takes a pivotal step for the further development of high-energy-density Na batteries.
Authors
- Junhao Wang (ORCID: https://orcid.org/0000-0002-2338-6191)
- Qizheng Zheng (ORCID: https://orcid.org/0000-0002-9508-5822)
- Meiling Yang (ORCID: https://orcid.org/0000-0003-4554-3191)
- Xiaoxiao Kuai (ORCID: https://orcid.org/0009-0001-6531-0283)
- Ziyang Ning (ORCID: https://orcid.org/0000-0002-7406-5312)
- Hong‐Gang Liao (ORCID: https://orcid.org/0000-0003-2622-9842)
- Chuying Ouyang (ORCID: https://orcid.org/0000-0001-8891-1682)
- Haitang Zhang (ORCID: https://orcid.org/0000-0002-8220-3180)
- Yeguo Zou (ORCID: https://orcid.org/0000-0001-9615-452X)
- Chenyang Jiao (ORCID: https://orcid.org/0009-0000-2622-0771)
- Baodan Zhang (ORCID: https://orcid.org/0000-0001-5602-5459)
- Jiyuan Xue
- Yu Qiao (ORCID: https://orcid.org/0000-0002-2191-3875)
- Shi‐Gang Sun (ORCID: https://orcid.org/0000-0003-2327-4090)
- Yilong Chen (ORCID: https://orcid.org/0000-0002-5875-2745)
- Xiaoyu Yu
- Haiyan Luo (ORCID: https://orcid.org/0000-0001-8785-0507)
Institutions
- Xiamen University (CN)
- Harbin Institute of Technology (CN)
- Tan Kah Kee Innovation Laboratory (CN)
- Collaborative Innovation Center of Chemistry for Energy Materials (CN)
- Jiangxi Normal University (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-09-30
- DOI
- https://doi.org/10.1002/adma.202410261
- Citations
- 63
- Primary Topic
- Advanced Battery Materials and Technologies
- Type
- article
- Field-Weighted Citation Impact
- 13.15
Funders
- National Natural Science Foundation of China
- Ministry of Science and Technology of the People's Republic of China
- China Postdoctoral Science Foundation
- Fundamental Research Funds for the Central Universities