Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 41, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201804133
Keywords
gold nanoparticles; intercalation; interlayer plating; lithium anodes; reduced graphene oxides
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Funding
- National Science Foundation of China [21776121]
- National Key Research and Development Program of China [2017YFA0205700]
- Thousand Youth Talents Plan
- Jiangsu Outstanding Youth Funds [BK20160012]
- National Materials Genome Project [2016YFB0700600]
- Jiangsu Shuangchuang Program
- Nantong Fundamental Research Funds [GY12016040]
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Lithium metal anodes suffer from serious safety issues and rapid capacity fade because of nonideal plating/stripping behaviors. Lithium nucleation on undesired positions usually results from nonuniform multiphysical field distributions and the dynamically changing interface thermodynamics. In this study, a sandwich composite anode consisting of gold nanoparticles pillared reduced graphene oxide (rGO) is designed . Because gold nanoparticles preferentially induce lithium nucleation, the typically uncontrolled lithium deposition process becomes a highly nucleation-guided process. Because the sandwich structure of the Au-pillared rGO provides a stable anode morphology with cycling and stabilizes the solid electrolyte interface layer, the Au-pillared rGO delivers a high Coulombic efficiency of up to 98% for at least 200 cycles for 1600 h. Using this pillared structure, an interlayer plating process is revealed in rGO-sandwiched anodes, which differ from either conventional metallic anodes or intercalation anodes. The Au-pillared design bridges the gap between metal and intercalation anodes, and provides a novel strategy to improve the efficiencies and cyclability of lithium anodes.
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