Ge/GeO2-Ordered Mesoporous Carbon Nanocomposite for Rechargeable Lithium-Ion Batteries with a Long-Term Cycling Performance

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• 作者：Lingxing Zeng ; Xiaoxia Huang ; Xi Chen ; Cheng Zheng ; Qingrong Qian ; Qinghua Chen ; Mingdeng Wei
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：8
• 期：1
• 页码：232-239
• 全文大小：510K
• ISSN：1944-8252

文摘

Germanium-based nanostructures are receiving intense interest in lithium-ion batteries because they have ultrahigh lithium ion storage ability. However, the Germanium-based anodes undergo the considerably large volume change during the charge/discharge processes, leading to a fast capacity fade. In the present work, a Ge/GeO₂-ordered mesoporous carbon (Ge/GeO₂–OMC) nanocomposite was successfully fabricated via a facile nanocasting route by using mesoporous carbon as a nanoreactor, and was then used as an anode for lithium-ion batteries. Benefited from its unique three-dimensional “meso-nano” structure, the Ge/GeO₂–OMC nanocomposite exhibited large reversible capacity, excellent long-time cycling stability and high rate performance. For instance, a large reversible capacity of 1018 mA h g^–1 was obtained after 100 cycles at a current density of 0.1 A g^–1, which might be attributed to the unique structure of the Ge/GeO₂–OMC nanocomposite. In addition, a reversible capacity of 492 mA h g^–1 can be retained when cycled to 500 cycles at a current density of 1 A g^–1.