Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 740, Issue -, Pages 830-835Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.12.336
Keywords
Anode materials; Initial coulombic efficiency; Nanostructures; Tin dioxide @carbon composites
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Funding
- National Natural Science Foundation of China [21474049, 51673034, 21574063, 21404055, 21272260]
- Shenzhen Science and Technology Innovation Committee [JCYJ20160531151102203, JCYJ20160608140827794]
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Recently, many exciting achievements have been made in improving the cycling performance of SnO2-based electrode. However, the low initial Coulombic efficiency of SnO2-based electrode caused by the formation of solid electrolyte interphase and some of the irreversible formation of Li2O in SnO2 structure still remains unresolved. Here this work reports a primary-cell process to prelithiate the SnO2-based composites to compensate the irreversible loss during the first cycle. The primary-cell-prelithiated SnO2@C composites performs a high initial Coulombic efficiency from 92.7% to >100% with the pre-lithiation time extends. Even after 600 cycles, the prelithiated (24 h) SnO2@C composites show a high capacity retention of 95% (848 mAhg(-1)) at a current density of 0.5 Ag-1. (C) 2018 Elsevier B.V. All rights reserved.
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