An Ultrastable Lithium Metal Anode Enabled by Designed Metal Fluoride Spansules

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2020 Mar 18

PMID 32181364

Citations 10

Authors

Huadong Yuan

Jianwei Nai

He Tian

Zhijin Ju

Wenkui Zhang

Yujing Liu

Xinyong Tao

Xiong Wen David Lou

Affiliations

Soon will be listed here.

Abstract

The lithium metal anode (LMA) is considered as a promising star for next-generation high-energy density batteries but is still hampered by the severe growth of uncontrollable lithium dendrites. Here, we design "spansules" made of NaMg(Mn)F@C core@shell microstructures as the matrix for the LMA, which can offer a long-lasting release of functional ions into the electrolyte. By the assistance of cryogenic transmission electron microscopy, we reveal that an in situ-formed metal layer and a unique LiF-involved bilayer structure on the Li/electrolyte interface would be beneficial for effectively suppressing the growth of lithium dendrites. As a result, the spansule-modified anode affords a high Coulombic efficiency of 98% for over 1000 cycles at a current density of 2 mA cm, which is the most stable LMA reported so far. When coupling this anode with the Li[NiCoMn]O cathode, the practical full cell further exhibits highly improved capacity retention after 500 cycles.

Citing Articles

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