Three-dimensional macroporous graphene/TiO2 nanocomposite as anode material for lithium ion batteries
Three-dimensional macroporous graphene/TiO2 nanocomposite as anode material for lithium ion batteries
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三维大孔石墨烯/TiO2纳米复合材料作为锂离子电池负极材料
DOI：
10.1166/mex.2015.1222
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发表时间：
2015-04-01
影响因子：
0.7
通讯作者：
Song, Bo
中科院分区：
文献类型：
--
作者：
Li, Jia-Jie;Zhang, Yu-Min;Song, Bo
利用交替加热-淬灭循环的简单方法合成了三维（3D）大孔石墨烯结构，其特点是高质量石墨烯纳米片的分层互连柔性网络具有少量含氧部分。该结构可作为负载功能纳米颗粒的合适支架和电荷载流子的快速传输通道。作为概念验证，我们制造了新型石墨烯/P25纳米复合材料，作为锂离子电池稳定的高性能负极材料；制备的纳米复合材料具有优异的电化学性能，100次循环后的容量高达120 mA h g(-1)，相当于裸P25的4.8倍。
A simple method based on alternating heating-quenching cycles is exploited to synthesize a three-dimensional (3D) macroporous graphene structure that is characterized by a hierarchically interconnected flexible network of high-quality graphene nanosheets with few oxygen-containing moieties. The structure can be employed as a suitable scaffold to load functional nanoparticles and as a fast transport channel for charge carriers. As a proof of concept, we fabricate novel graphene/P25 nanocomposites that are examined as stable high-performance anode materials for lithium ion batteries; the prepared nanocomposites feature excellent electrochemical performance with a capacity as high as 120 mA h g(-1) after 100 cycles that is similar to 4.8 times larger than that of bare P25.