Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 36, Pages 20911-20918Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta05335b
Keywords
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Funding
- National Natural Science Foundation of China [51874360]
- Natural Science Foundation of Hunan Province [2018JJ3669]
- Postdoctoral Science Foundation of China [BX201700290, 2018M630911]
- Innovation-Driven Project of Central South University [2018CX006]
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Infinite volume expansion and high reactivity severely hinder the commercial applications of lithium metal batteries. Moreover, the short circuit caused by Li dendrites is fatal for the long-term performance of lithium metal batteries and may cause safety problems. Herein, lithiophilic silver/lithium (Ag/Li) composite anodes are synthesized via a spontaneous displacement reaction between silver nitrate and Li foil at room temperature, which can settle the above challenges by regulating Li nucleation and homogenizing Li-ion flux. Benefiting from the lithiophilic design, Li ion realizes zero nucleation overpotential on the asobtained Ag/Li anodes with abundant spherical silver nanoparticles. Additionally, the by-product, lithium nitrate, acts as an electrolyte additive, which further ensures uniform Li deposition. Consequently, Ag/Li symmetric cells demonstrate ultralong lifespan with repeated plating/stripping for 1000 cycles at the current densities of 1 mA cm(-2) and 5 mA cm(-2), with negligible voltage fluctuations. Furthermore, the full-cell devices, paired with LiFePO4, also exhibit excellent electrochemical performance. The facile and effective strategy provides a promising prospect for commercial applications of lithium metal batteries.
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