Chemical vapor deposition derived flexible graphene paper and its application as high performance anodes for lithium rechargeable batteries
Chemical vapor deposition derived flexible graphene paper and its application as high performance anodes for lithium rechargeable batteries
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DOI：
10.1039/c2ta00140c
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Gao, Jinsen
中科院分区：
文献类型：
--
作者：
Ning, Guoqing;Xu, Chenggen;Gao, Jinsen
我们提出了一种利用化学气相沉积(CVD)衍生的石墨烯来制备柔性石墨烯的新方法。在CVD工艺中，膨胀的蛭石被用作分层模板，以生产包含数百微米量级的克级石墨烯的块状材料。通过模板处理可以在石墨烯薄膜中引入网状结构或碳纳米管。由于石墨烯的片材尺寸较大，制备的石墨烯薄片容易制成表面密度低、导电性好的柔性石墨烯纸，与使用还原石墨烯氧化物制备的石墨烯纸相比，该石墨烯纸的可逆容量(50 mA g(-1)下的1350 mA h g(-1))和作为锂二次电池负极的循环性能都有很大提高。
We present a novel approach to fabricate flexible graphene papers using chemical vapor deposition (CVD) derived graphene. Expanded vermiculite was used as a layered template in the CVD process to produce bulk materials containing graphene sheets of the order of hundreds of microns at a gram scale. Meshes or carbon nanotubes can be introduced into the graphene sheets by template pretreating. Owing to the large sheet size, the as-obtained graphene sheets were easily fabricated into flexible graphene papers with low surface density and good conductivity, which exhibited greatly enhanced reversible capacity (1350 mA h g(-1) at 50 mA g(-1)) and cycling performance as anodes for lithium rechargeable batteries as compared to the graphene papers fabricated using reduced graphene oxide.