Fabrication of free-standing N-doped carbon/TiO2 hierarchical nanofiber films and their application in lithium and sodium storages
Fabrication of free-standing N-doped carbon/TiO2 hierarchical nanofiber films and their application in lithium and sodium storages
复制标题
DOI：
10.1016/j.jallcom.2017.01.100
复制
发表时间：
2017-04
影响因子：
6.2
通讯作者：
Jinran Shen;Wentao Hu;Yueming Li;Liqiang Li;Xiao-Jun Lv;Long Zhang
中科院分区：
文献类型：
--
作者：
Jinran Shen;Wentao Hu;Yueming Li;Liqiang Li;Xiao-Jun Lv;Long Zhang
为了简化电池电极的制备工艺，提高电池的电化学性能，采用静电纺丝法制备了N掺杂碳掺杂TiO2纳米纤维自支撑薄膜，并在氮气保护下进行热处理.结果表明，在700 °C或更高温度下，由于碳基体的存在和相转变，形成了分层结构的纳米纤维。所制备的膜作为锂离子电池和钠离子电池中的阳极进行测试。电化学结果表明，在锂离子电池和钠离子电池中均可实现高倍率性能（在5 A g− 1时，锂离子电池为180 mAh g− 1）和优异的循环稳定性。这种自支撑膜不含粘合剂，因此具有易于制造和令人满意的电化学性能，有望用于锂离子电池和钠离子电池的放大应用。
To simplify the fabrication of electrode in batteries and improve the electrochemical performance, free-standing films composed of N-doped carbon incorporated TiO2hierarchical nanofibers were prepared via electrospinning followed by heat-treatment under a nitrogen atmosphere in this study. It is found that hierarchical nanofibers were formed at 700 °C or above due to the phase transformation and the presence of carbon matrix. The as-prepared film was tested as an anode in lithium-ion batteries and sodium-ion batteries. Electrochemical results demonstrate a high rate performance (180 mAh g−1at 5 A g−1in lithium ion batteries) and excellent cycle stability can be achieved in lithium-ion batteries as well as in sodium-ion batteries. This self-standing film is binder free and thus promising for scale-up applications for lithium-ion batteries and sodium-ion batteries with easy fabrication and satisfactory electrochemical performance.