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Issue 48, 2019
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Nitrogen-doped graphdiyne nanowall stabilized dendrite-free lithium metal anodes

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Abstract

Lithium constitutes an ultimate anode material for Li metal-based batteries (LMBs, e.g., Li–S and Li–air). Nevertheless, the dendritic Li growth during repeated plating/stripping processes would cause fast capacity decay and serious safety concerns. The integration of porous current collectors with carbon nanomaterials has attracted special interest recently in suppression of Li dendrite growth. However, the large amounts of Li plating under high power conditions remain a major challenge for such hosts because most nanocarbons suffer from poor lithiophilicity. Herein, for the first time, nitrogen-doped graphdiyne nanowall-modified copper foam (N-GDY) is prepared as a highly lithiophilic host to achieve high-rate dendrite-free Li plating with high areal capacities. Such a N-GDY host features highly lithiophilic N-containing groups, abundant graphdiyne nanopores and a stable Li plating interface, guaranteeing a quite low nucleation overpotential of 13 mV and a plating/stripping coulombic efficiency of above 99.0% under synergistic conditions with high current density and areal capacity. Hence, the N-GDY@Li anode maintains a dendrite-free morphology and low voltage hysteresis under a harsh working condition for over 350 h, significantly outperforming the counterparts deposited on other carbon films. Furthermore, the N-GDY@Li anode-derived full cells also exhibit enhanced electrochemical performance towards practical applications of advanced LMBs.

Graphical abstract: Nitrogen-doped graphdiyne nanowall stabilized dendrite-free lithium metal anodes

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Supplementary files

Article information


Submitted
30 Aug 2019
Accepted
13 Nov 2019
First published
15 Nov 2019

J. Mater. Chem. A, 2019,7, 27535-27546
Article type
Paper

Nitrogen-doped graphdiyne nanowall stabilized dendrite-free lithium metal anodes

T. Jiang, K. Chen, J. Wang, Z. Hu, G. Wang, X. Chen, P. Sun, Q. Zhang, C. Yan and L. Zhang, J. Mater. Chem. A, 2019, 7, 27535
DOI: 10.1039/C9TA09551A

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