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Issue 39, 2019
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A dual-phase Li–Ca alloy with a patternable and lithiophilic 3D framework for improving lithium anode performance

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Abstract

The growth of lithium (Li) dendrites hinders the application of Li metal anodes in rechargeable Li batteries. Herein, a dual-phase alloy of Li–Ca is proposed to replace Li metal as an advanced anode, which is composed of a Li metal phase and a CaLi2 alloy phase. The three dimensional (3D) CaLi2 alloy framework forms regular patterns via phase segregation while cooling down the molten Li–Ca alloy in a facile one-step fusion fabrication process, where pattern shape and mechanical stability change with the atomic ratio of Ca to Li. The porous CaLi2 alloy framework is functionalized as a lithiophilic current collector in the lithiation process, featuring enhanced structural stability and suppressed Li dendrite growth. Consequently, the electrochemical performance of a dual-phase Li–Ca alloy anode with microsized patterns is significantly improved with a Li metal phase as the reservoir providing reversible capacity. This dual-phase Li alloy with a regularly arranged 3D lithiophilic framework provides a new solution for lithium metal batteries.

Graphical abstract: A dual-phase Li–Ca alloy with a patternable and lithiophilic 3D framework for improving lithium anode performance

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Supplementary files

Article information


Submitted
12 Aug 2019
Accepted
05 Sep 2019
First published
06 Sep 2019

J. Mater. Chem. A, 2019,7, 22377-22384
Article type
Paper

A dual-phase Li–Ca alloy with a patternable and lithiophilic 3D framework for improving lithium anode performance

W. Jia, Z. Wang, J. Li, X. Yu, Y. Wei, Z. Yao, Y. Liu, Y. Wang, A. Zhou, W. Zou, F. Zhou and H. Li, J. Mater. Chem. A, 2019, 7, 22377
DOI: 10.1039/C9TA08798B

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