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Lithium‐Containing Hybrid SEI Layer Enabling High Mass Loading and Anode‐Less Sodium Metal Batteries

Journal Article · · Angewandte Chemie
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [4];  [1];  [1];  [1];  [5];  [1]
  1. State Key Laboratory of Physical Chemistry of Solid Surface College of Materials Xiamen University Xiamen 361005 China
  2. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA
  3. Contemporary Amperex Technology Co., Ltd Ningde 352100 China
  4. Multiscale Computational Materials Facility College of Materials Science and Engineering, Fuzhou University Fuzhou 350100 China
  5. Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 USA, Pritzker School of Molecular Engineering The University of Chicago Chicago IL 60637 USA
Abstract

The continuous rupturing and rebuilding of unstable solid electrolyte interphase (SEI) layer during cycling would block Na + diffusion and induce Na dendrite formation, ultimately limiting the practical application of high‐energy‐density sodium metal batteries. Herein, a hybrid SEI layer containing Li‐species is dexterously constructed on the surface of sodium metal anode. Li‐containing inorganic components (Li 3 N, LiF, and Li 2 CO 3 ) are introduced to stabilize the Na/electrolyte interface and enhance the mechanical and diffusion kinetic properties of the SEI layer, which can reduce the side reactions and gas generation, regulate Na + flux during cycling and promote rapid Na + migration for uniform dendrite‐free Na deposition. As a result, the constructed Na symmetric cells achieve low overpotential and long cycle life of 5900, 1800, and 500 h at current densities of 3, 10, and 30 mA cm −2 , respectively. Furthermore, the full cells paired with the Na₃V₂(PO₄)₃ cathode demonstrate high specific capacity and excellent cycle stability, even at an ultra‐high cathode loading of 39.3 mg cm −2 and a low N/P ratio (negative/positive electrode capacity ratio of 1.21).

Sponsoring Organization:
USDOE
OSTI ID:
2545138
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 21 Vol. 137; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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Lithium‐Containing Hybrid SEI Layer Enabling High Mass Loading and Anode‐Less Sodium Metal Batteries
Journal Article · Sat Mar 15 20:00:00 EDT 2025 · Angewandte Chemie (International Edition) · OSTI ID:2545120

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