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.

中文翻译：

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Ta2O5@C/F复合纳米管作为锂离子电池稳定负极材料的制备

摘要 在本文中，通过溶胶-凝胶法制备了螺旋状介孔 Ta2O5 纳米管和 Ta2O5/掺氟碳复合纳米管（Ta2O5@C/F）（~9 wt% C 和~1 wt% F）。手性凝胶剂作为模板。电化学研究表明，Ta2O5纳米管电极和Ta2O5@C/F纳米管电极均具有良好的储锂能力和循环稳定性。Ta2O5@C/F的可逆容量高于Ta2O5，而Ta2O5@C/F的阻抗低于Ta2O5。这些结果表明，氟掺杂碳层的涂层可以有效地提高过渡金属氧化物阳极的电化学性能。