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High Interfacial-Energy and Lithiophilic Janus Interphase Enables Stable Lithium Metal Anodes

Journal Article · · Small
 [1];  [2];  [3];  [2]
  1. Shandong Univ., Qingdao, Shandong (China)
  2. Qingdao Univ. of Science and Technology (China)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
The stability of solid electrolyte interphase (SEI) layers is critical for developing lithium (Li) metal batteries. However, the fabrication of stable SEI layers is plagued by un-controlled structures, properties, and functions. In this work a controllable design of an ordered LiF-rich and lithiophilic hybrid Janus interphase (LiF-HJI) is reported using organic fluorination reagent as a functional SEI precursor. The LiF-HJI with a lower crystalline LiF layer and an upper Li organosulfide layer provides high interfacial energy with the Li metal and strong Li-ion affinity, allows homogenous Li-ion distribution, fast and uniform Li-ion transport, and excellent mechanical and passivation properties, enabling stable Li metal anodes under harsh conditions, such as high deposition capacities (6 mA h cm-2), current densities (10 mA cm-2), and rates (5 C). Stable LiF-HJI@Li greatly improves cycling stability and capacity retention (80.1% after 300 cycles) of Li||LiNi0.8Co0.1Mn0.1O2 cells at a commercial-level areal capacity (≈4.2 mA h cm-2). Even under a lean-electrolyte condition of 3 g Ah-1, 80% capacity retention can be maintained after 100 cycles, demonstrating excellent cycling performance under such harsh conditions.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1991176
Journal Information:
Small, Journal Name: Small Journal Issue: 36 Vol. 17; ISSN 1613-6810
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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