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Pre-Planted Nucleation Seeds for Rechargeable Metallic Lithium Anode

Abstract

Metallic lithium is one of the most favorable anode materials for the next-generation energy storage systems owing to its high theoretical capacity, low density and the lowest negative electrochemical potential. Despite these attractive advantages, problems induced by uneven Li deposition and volume expansion have hindered the practical application of Li-metal anode. Among numerous efforts to stabilize metallic lithium anode, regulating lithium deposition at the nucleation stage is challenging. Herein, we propose a strategy of pre-planting nucleation seeds to inhibit the uneven dendrite growth of metallic lithium. The nucleation and growth of lithium dendrites can be efficiently regulated by adequate heterogeneous nucleation seeds while the lamellar structure can accommodate the volume change to some extent. Benefiting from these two aspects, the Li-Cu hybrids exhibit superior electrochemical performance in terms of lower over-potential, superior cycle stability with flatter voltage plateau and prolonged lifespan, and a high specific capacity of 2023 mAh g-1. On this basis, electrochemical tests on full-cells with LiFePO4 as cathode also confirm the effectiveness of Li-Cu hybrids anode which show highly stable cycling performance and excellent capacity retention.

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Publication details

The article was received on 07 Jun 2017, accepted on 09 Aug 2017 and first published on 10 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA04932C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Pre-Planted Nucleation Seeds for Rechargeable Metallic Lithium Anode

    Y. Liu, B. Li, S. Li, J. Liu and S. Yang, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA04932C

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