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- Title
Fluoroethylene Carbonate Additives to Render Uniform Li Deposits in Lithium Metal Batteries.
- Authors
Zhang, Xue‐Qiang; Cheng, Xin‐Bing; Chen, Xiang; Yan, Chong; Zhang, Qiang
- Abstract
Lithium (Li) metal has been considered as an important substitute for the graphite anode to further boost the energy density of Li-ion batteries. However, Li dendrite growth during Li plating/stripping causes safety concern and poor lifespan of Li metal batteries (LMB). Herein, fluoroethylene carbonate (FEC) additives are used to form a LiF-rich solid electrolyte interphase (SEI). The FEC-induced SEI layer is compact and stable, and thus beneficial to obtain a uniform morphology of Li deposits. This uniform and dendrite-free morphology renders a significantly improved Coulombic efficiency of 98% within 100 cycles in a Li | Cu half-cell. When the FEC-protected Li metal anode matches a high-loading LiNi0.5Co0.2Mn0.3O2 (NMC) cathode (12 mg cm−2), a high initial capacity of 154 mAh g−1 (1.9 mAh cm−2) at 180.0 mA g−1 is obtained. This LMB with conversion-type Li metal anode and intercalation-type NMC cathode affords an emerging energy storage system to probe the energy chemistry of Li metal protection and demonstrates the material engineering of batteries with very high energy density.
- Subjects
FLUOROETHYLENE; CARBONATES; LITHIUM; LITHIUM-ion batteries; ENERGY density; SUPERIONIC conductors
- Publication
Advanced Functional Materials, 2017, Vol 27, Issue 10, pn/a
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201605989