Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3044453
Keywords
amorphous semiconductors; electrochemical electrodes; porous semiconductors; secondary cells; semiconductor thin films; silicon compounds; spraying; tin compounds
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Funding
- 973 National Key Basic Research Program of China [2007CB310500]
- Chinese Ministry of Education [705040]
- National Natural Science Foundation of China [90606009]
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Amorphous SnO2-SiO2 thin films with reticular porous morphology were fabricated by electrostatic spray deposition method for lithium-ion batteries. An initial discharge capacity of the SnO2-SiO2 electrodes with 15% of SiO2 was about 1271 mA h/g, and the reversible capacity stayed in the range of 869-501 mA h/g during the successive 100 cycles, but only 1141 and 694-174 mA h/g for the pure SnO2 electrodes. The high capacity was attributed to the addition of SiO2, which facilitated the formation of the Li-Sn alloy. The improved cycle performance was due to reticular porous structure, which accommodated the volume change during cycling.
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