Abstract
The volume expansion effect is a huge challenge for commercial use of Li-SnO2 batteries. In this paper, hydroxyapatite nanowires (HN) were used as the support for nanometer tin oxide to prepare the SnO2/HN-180 materials. During the electrochemical reaction, the SnO2/HN-180 materials react with lithium ions to form tin phosphate and lithium phosphate, which can effectively reduce the formation of Li2O and reduce the first irreversible capacity. The SnO2/HN-180 batteries show high specific capacity(1793.71 mAh g−1 of 100 mAh g−1), excellent cycle performance(1212.01 mAh g-1 after 500 cycles), excellent coulombic efficiency(99.89 %) and low internal resistance. Electrochemical test data show that the specific capacity of SnO2/HN-180 materials are much higher than that of graphite materials(782 mAh g-1). The SnO2/HN-180 materials are expected to become a commercial anode materials in the future.
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