Nanocrystal-Constructed Mesoporous Single-Crystalline Co3O4 Nanobelts with Superior Rate Capability for Advanced Lithium-Ion Batteries

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• 作者：Hui Huang ; Wenjun Zhu ; Xinyong Tao ; Yang Xia ; Zhaoyang Yu ; Junwu Fang ; Yongping Gan ; Wenkui Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：November 28, 2012
• 年：2012
• 卷：4
• 期：11
• 页码：5974-5980
• 全文大小：547K
• 年卷期：v.4,no.11(November 28, 2012)
• ISSN：1944-8252

文摘

In this paper, one-dimensional (1D) mesoporous single-crystalline Co₃O₄ nanobelts are synthesized by a facile hydrothermal method followed by calcination treatment. The as-prepared nanobelts have unique mesoporous structures, which are constructed by many interconnected nanocrystals with sizes of about 20鈥?0 nm. And typical size of the nanobelts is in the range of 100鈥?00 nm in width and up to several micrometers in length. The BET surface area of Co₃O₄ nanobelts is determined to be about 36.5 m² g^鈥? with dominant pore diameter of 29.2 nm. Because of the 1D structure, mesoporous morphologies and scrupulous nanoarchitectures, the Co₃O₄ nanobelts show excellent electrochemical performances such as high storage capacity and superior rate capability. The specific capacity of Co₃O₄ nanobelts could remains over 614 mA h g^鈥? at a current density of 1 A g^鈥? after 60 cycles. Even at a high current density of 3 A g^鈥?, these Co₃O₄ nanobelts still could deliver a remarkable discharge capacity of 605 mA h g^鈥? with good cycling stability.

Keywords:

Co₃O₄; hydrothermal synthesis; mesoporous nanobelts; single-crystalline; lithium-ion batteries