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Reducing Lithium Deposition Overpotential with Silver Nanocrystals Anchored on Graphene Aerogel

Abstract

Li metal as an anode for high-energy-density batteries is actively pursued due to its high specific capacity and ultralow electrochemical potential. Unfortunately, the dendrite growth issue that might induce the short circuit and the safety hazard of a battery limits the practical application of Li metal anode. Herein, a novel anode, graphene aerogel (GA) decorated with silver nanocrystals (AgNCs@GA), is reported for effectively suppressing lithium dendrite growth and improving coulombic efficiency at various current densities. This promotion primarily profits from AgNCs for Li deposition. The loaded AgNCs with high Li affinity serve as Li deposition sites, which deeply reduce the overpotential of Li nucleation and electrodeposition. Therefore, it successfully realizes stable Li depositing/stripping processes with an enhanced coulombic efficiency at various current densities and areal capacities. The pre-lithiated AgNCs@GA is evaluated as an anode of Li battery and demonstrates remarkable performance prevailing over the commercial lithium foil.

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Publication details

The article was received on 08 Jun 2018, accepted on 09 Aug 2018 and first published on 09 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR04655G
Citation: Nanoscale, 2018, Accepted Manuscript
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    Reducing Lithium Deposition Overpotential with Silver Nanocrystals Anchored on Graphene Aerogel

    X. Wang, Z. Pan, Y. Wu, G. Xu, X. Zheng, Y. Qiu, M. Liu, Y. Zhang and W. Li, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR04655G

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