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Regulating lithium deposition behavior by electrokinetic effects in a high-zeta-potential h-BN/zinc-lithium alloy for high-performance lithium metal anodes.

Authors :
Liu, Shipeng
Zhao, Jingteng
Li, Fang
Zhao, Yingjie
Li, Guoxing
Source :
Journal of Materials Chemistry A; 3/14/2022, Vol. 10 Issue 10, p5221-5229, 9p
Publication Year :
2022

Abstract

The commercial application of lithium metal anodes is impeded by the uncontrollable growth of lithium dendrites and the serious volume change during the cycling process. Here we develop a high-zeta-potential h-BN-doped zinc-lithium alloy (Li-ZB) as an anode to self-drive electrokinetic effects and regulate the lithium deposition behavior to achieve high-performance lithium metal batteries. The high-zeta-potential h-BN in Li-ZB promotes electrokinetic surface conduction and electroosmosis within the porous Zn-BN framework formed after lithium stripping, which in turn greatly enhances lithium-ion transport kinetics. Uniform Zn distribution in Li-ZB enables homogenous lithium nucleation and a reduced nucleation barrier. The synergistic effect of electrokinetic effect enhanced lithium-ion transport and regulated lithium nucleation behavior effectively suppresses lithium dendrite growth and mitigates the volume change issue at high deposition capacities (8 mA h cm<superscript>−2</superscript>), high current densities (10 mA cm<superscript>−2</superscript>), and a high rate (5C). The Li-ZB‖LiNi<subscript>0.8</subscript>Co<subscript>0.1</subscript>Mn<subscript>0.1</subscript>O<subscript>2</subscript> full cells exhibit excellent cycling stability and capacity retention, as well as significantly enhanced CE, even under lean-electrolyte conditions (e.g., 3 μL mA h<superscript>−1</superscript>). The designed Li-ZB anodes show great potential application for next-generation lithium metal batteries with high energy density. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20507488
Volume :
10
Issue :
10
Database :
Complementary Index
Journal :
Journal of Materials Chemistry A
Publication Type :
Academic Journal
Accession number :
155620078
Full Text :
https://doi.org/10.1039/d1ta10200a