Three-Dimensional Lithium Anode with an In Situ Generated Li<sub>2</sub>O-Rich Solid Electrolyte Interface for High-Rate and Long-Storage Lithium Battery

Three-Dimensional Lithium Anode with an In Situ Generated Li<sub>2</sub>O-Rich Solid Electrolyte Interface for High-Rate and Long-Storage Lithium Battery

The limited rate performance of Li||CF<sub>x</sub> batteries hinders their wide application, owing to the low conductivity of CF<sub>x</sub> cathode material and the undesirable solid electrolyte interface (SEI) layer formed on the Li anode surface. Herein, a strategy for con...

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Bibliographic Details
Main Authors: Ping Li, Xuan Liu, Yingke Zhou, Xiangyu Cheng, Luozhi Mo, Xiaohui Tian, Zhongzhi Yuan
Format: Article
Language:English
Published: MDPI AG 2024-12-01
Series:Energies
Subjects:
three-dimensional lithium anode
Li<sub>2</sub>O-rich SEI
lithiophilic layer
high-rate capacity
Li||CF<sub>x</sub> battery
Online Access:https://www.mdpi.com/1996-1073/17/24/6283
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Summary:The limited rate performance of Li||CF<sub>x</sub> batteries hinders their wide application, owing to the low conductivity of CF<sub>x</sub> cathode material and the undesirable solid electrolyte interface (SEI) layer formed on the Li anode surface. Herein, a strategy for constructing a three-dimensional lithium anode (3D-Li anode) with high specific surface area and an in situ formed favorable SEI layer is proposed to enhance the interfacial stability and uniformity of ion transport and realize a Li||CF<sub>x</sub> battery with remarkable comprehensive performance. A 3D-Li anode (Li@CuO-Cu foam) is successfully constructed by molten Li infusion of a thermal oxidation processed copper foam. The lithiophilicity of the Cu foam framework is optimized by the formed CuO. The Li@CuO-Cu foam||CF<sub>x</sub> battery exhibits a high discharge specific capacity (1149.6 mAh g<sup>−1</sup> at 0.1 C) along with a high discharge plateau voltage (2.65 V). At a high rate of 10 C, the 3D-Li anode-based batteries still demonstrate a discharge specific capacity of 463 mAh g<sup>−1</sup>, which is about 2.5 times that of the conventional Li||CF<sub>x</sub>, and exhibit excellent storage performance (620.3 mAh g<sup>−1</sup> after storage at 55 °C for 90 days) and a low monthly self-discharge rate (1.28%). This work demonstrates a promising strategy to construct a three-dimensional lithium metal anode and significantly improve the rate and storage performance of Li||CF<sub>x</sub> batteries.
ISSN:1996-1073

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