Hierarchically porous nanoflowers from TiO₂-B nanosheets with ultrahigh surface area for advanced lithium-ion batteries

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• 作者：Hui Huang ; Zhaoyang Yu ; Wenjun Zhu ; Yongping Gan ; Yang Xia ; Xinyong Tao ; Wenkui Zhang ; ^{msechem@zjut.edu.cn" class="auth_mail}
• 关键词：A. Microporous materials ; A. Nanostructures ; A. Oxides ; D. Electrochemical properties
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：May, 2014
• 年：2014
• 卷：75
• 期：5
• 页码：619-623
• 全文大小：1722 K

文摘

In this work, hierarchically porous TiO₂-B nanoflowers have been successfully synthesized via a facile solvothermal method followed by calcination treatment. The TiO₂-B nanoflowers are constructed by thin nanosheets, presenting ultrahigh specific surface area, up to 214.6 m² g^鈭?. As anode materials for Li-ion batteries, the TiO₂-B sample shows high reversible capacity, excellent cycling performance and superior rate capability. The specific capacity of TiO₂-B could remain over 285 mA h g^鈭? at 1 C and 181 mA h g^鈭? at 10 C rate after 100 cycles. We believe that the pseudocapacitive mechanism, ultrahigh surface area and scrupulous nanoarchitecture of the TiO₂-B are responsible for the enhancement of electrochemical properties.