Photochemical synthesis of SnO2/TiO2 composite nanotube arrays with enhanced lithium storage performance
Photochemical synthesis of SnO2/TiO2 composite nanotube arrays with enhanced lithium storage performance
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光化学合成具有增强锂存储性能的SnO2/TiO2复合纳米管阵列
DOI：
10.1016/j.jallcom.2016.03.041
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发表时间：
2016-07
影响因子：
6.2
通讯作者：
Chu-nan Cao
中科院分区：
文献类型：
--
作者：
Peipei Zhang;Shasha Zhu;Zhishun He;Kai Wang;Huiqing Fan;Yuan Zhong;Ling Chang;Haibo Shao;Jianming Wang;Jianqing Zhang;Chu-nan Cao
纳米SnO 2/TiO 2杂化材料是一种很有前途的锂离子电池负极材料。本文报道了一种新的节能的光沉积法制备SnO 2/TiO 2复合纳米管。在光沉积过程中，Sn 2+离子被光生空穴氧化为SnO 2，从而在TiO 2纳米管的内外壁上沉积SnO 2纳米颗粒。这导致了SnO 2/TiO 2复合纳米管的形成与分级多孔结构。正偏压的存在可以通过减少空穴-电子复合来增强Sn 2+离子的光氧化作用，导致更多的SnO 2纳米颗粒沉积在TiO 2纳米管的管壁上。在100 μA·cm-2的电流密度下，在正偏压下，通过光沉积制备的SnO 2/TiO 2复合膜电极在电化学循环过程中表现出比相应的可控电极高得多的储锂容量。在100 μA cm-2的电流密度下，在正偏压下光沉积的复合薄膜电极中SnO 2的比容量在100次循环后估计为766 mAh g-1，显示了其突出的锂存储性能。这种简单、节能的光沉积方法可以作为一种有效的途径来制备其他具有可控形貌和尺寸的复合材料。
Nanostructured SnO2/TiO2hybrid materials can be promising anode materials for lithium ion batteries (LIBs). We herein report a novel and energy-saving photodeposition approach to fabricate SnO2/TiO2composite nanotubes. In the photodeposition process, Sn2+ions are oxidized to SnO2by the photogenerated holes, thus SnO2nanoparticles are deposited onto both the inner and outer walls of TiO2nanotubes. This results in the formation of the SnO2/TiO2composite nanotubes with a hierarchically porous architecture. The existence of the positive bias can enhance the photooxidation of Sn2+ions by decreasing the hole–electron recombination, leading to the deposition of more SnO2nanoparticles on the walls of TiO2nanotubes. The SnO2/TiO2composite film electrode fabricated by the photodeposition at the positive bias shows much higher lithium storage capacity than the corresponding controllable electrodes during the electrochemical cycling at a current density of 100 μA cm−2. The specific capacity of SnO2in the composite film electrode photodeposited at the positive bias is estimated to be 766 mAh g−1after 100 cycles at a current density of 100 μA cm−2, demonstrating its prominent lithium storage performance. The as-constructed facile and energy-saving photodeposition method can be used as an efficient route to prepare other composite materials with controlled morphologies and dimensions.
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影响因子：
3.7
作者：
Cai, Guofa;Tu, Jiangping;Gu, Changdong
通讯作者：
Gu, Changdong
影响因子：
9.2
作者：
Yuan Zhong;H. Fan;Ling Chang;H. Shao;Jianming Wang;Jian-qing Zhang;C. Cao
通讯作者：
Yuan Zhong;H. Fan;Ling Chang;H. Shao;Jianming Wang;Jian-qing Zhang;C. Cao
影响因子：
6.2
作者：
Yakun Bu;Yiyin Huang;Tengfei Li;Pengwu Wu;Yaobing Wang;J. Yao
通讯作者：
Yakun Bu;Yiyin Huang;Tengfei Li;Pengwu Wu;Yaobing Wang;J. Yao
同轴 SnO2@TiO2 纳米管杂化物：从稳健的组装策略到锂存储的潜在应用
影响因子：
--
作者：
Wu, Xiaomeng;Zhang, Shichao;Wang, Lili;Du, Zhijia;Fang, Hua;Ling, Yunhan;Huang, Zhaohui
通讯作者：
Huang, Zhaohui
影响因子：
4.5
作者：
Chen, Yong;Hong, Lei;Li, Jiansheng
通讯作者：
Li, Jiansheng