Abstract
In this paper, helical mesoporous Ta2O5 nanotubes and Ta2O5/fluorine-doped carbon composite nanotubes (Ta2O5@C/F) (~9 wt% of C and ~1 wt% of F) were prepared via a sol–gel method, using a chiral gelator as the template. Electrochemical studies showed that, the Ta2O5 nanotubes electrode and Ta2O5@C/F nanotubes electrode both possessed good Li-storage capability and cycling stability. The reversible capacity of Ta2O5@C/F was higher than that of Ta2O5, while the impedance of Ta2O5@C/F was lower than that of Ta2O5. These results indicated that the coating of fluorine-doped carbon layer could effectively improve the electrochemical performance of transition metal oxide anodes.
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