Superior cyclability of branch-like TiO2 embedded on the mesoporous carbon nanofibers as free-standing anodes for lithium-ion batteries
Superior cyclability of branch-like TiO2 embedded on the mesoporous carbon nanofibers as free-standing anodes for lithium-ion batteries
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嵌入介孔碳纳米纤维的枝状二氧化钛作为锂离子电池的独立阳极具有优异的循环性能
DOI：
10.1016/j.jallcom.2017.02.234
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发表时间：
2017-06
影响因子：
6.2
通讯作者：
Hanming Lv
中科院分区：
文献类型：
--
作者：
Xianhua Li;Baoming Zhou;Wei Wang;Zhiwei Xu;Nan Li;Liyun Kuang;Cuiyu Li;Wei Mai;Hongjun Fu;Hanming Lv
针对锂离子电池TiO 2/C负极材料容量利用率低、循环性能差等问题，采用静电纺丝技术、水热处理和碳化工艺制备了树枝状TiO2 @介孔碳纳米纤维（TiO2@MCNFs）自支撑负极材料。由于在除主干支撑外的分支上具有丰富的高度暴露的TiO 2纳米晶格、用于流畅的Li+传输的丰富的本征晶体通道以及具有高结构完整性和机械柔性的交错的碳纳米骨架，树枝状TiO 2 @ MCNFs复合材料表现出优异的上级初始放电容量（1932 mAhg− 1）和优异的可逆容量（100次循环后为1617 mAhg− 1）。与已报道的TiO 2/C电极相比，树枝状TiO2@MCNFs复合材料的首次放电容量和可逆容量分别提高了1.2倍和1.50%。因此，树枝状TiO2@MCNF复合材料的独特结构及其上级电化学性能可能为开发更好的实用锂离子电池主体材料提供新的见解。
For the poor capacity utilization and insufficient cyclability of TiO2/C anodes for lithium-ion batteries, we synthesized branch-like TiO2@mesoporous carbon nanofibers (TiO2@MCNFs) as free-standing anodes via electrospinning technique, hydrothermal treatment and a subsequent carbonization process, where anatase TiO2branches were densely embedded on the mesoporous carbon nanofiber trunks. Due to the copious highly-exposed TiO2nanocrystal lattices on the branch except for the trunk support, the abundant intrinsic crystal channels for fluent Li+transportation, and the interlaced carbon nanofiber framework with a high structural integrity and mechanical flexibility, the branch-like TiO2@MCNFs composites presented a superior initial discharge capacity of 1932 mAhg−1and an excellent reversible capacity of ∼617 mAhg−1after 100 cycles. And compared with those of the reported TiO2/C electrodes, the initial discharge capacity and reversible capacity of the branch-like TiO2@MCNFs composites increased by ∼2 times and ∼50%, respectively. Hence, the unique architecture of the branch-like TiO2@MCNFs composites and their superior electrochemical performances may provide new insights for the development of better host materials for practical lithium-ion batteries.
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影响因子：
5.4
作者：
Yuanyuan Zhou;Songhun Yoon
通讯作者：
Yuanyuan Zhou;Songhun Yoon
影响因子：
19
作者：
Yanhua Cheng;Zhengu Chen;Haobin Wu;Meifang Zhu;Yunfeng Lu
通讯作者：
Yanhua Cheng;Zhengu Chen;Haobin Wu;Meifang Zhu;Yunfeng Lu
影响因子：
6.6
作者：
X. Bai;Tao Li;Yong-xin Qi;Yanxiang Wang;Longwei Yin;Hui Li;N. Lun;Yu-Jun Bai
通讯作者：
X. Bai;Tao Li;Yong-xin Qi;Yanxiang Wang;Longwei Yin;Hui Li;N. Lun;Yu-Jun Bai
影响因子：
5.4
作者：
Wenjun Zhu;Hui Yang;Xie Yuan;Sai Sun;Xingzhong Guo
通讯作者：
Wenjun Zhu;Hui Yang;Xie Yuan;Sai Sun;Xingzhong Guo
影响因子：
9.2
作者：
Shen, Zhen;Hu, Yi;Chen, Renzhong
通讯作者：
Chen, Renzhong