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Holey Graphene for Electrochemical Energy Storage
Cell Reports Physical Science ( IF 8.9 ) Pub Date : 2020-09-30 , DOI: 10.1016/j.xcrp.2020.100215
Tao Liu , Liuyang Zhang , Bei Cheng , Xianluo Hu , Jiaguo Yu

Graphene and its hybrids have been considered promising candidates for electrochemical energy storage because of their fascinating physicochemical properties. However, they suffer from unsatisfactory areal or volumetric energy density and relatively poor rate performance. These drawbacks are due to limited accessible surface area and poor ion diffusion capacity arising from the agglomeration and restacking of graphene nanosheets during electrode assembly. To solve the above issues, perforation on the graphene planes is adopted, which bestows the graphene-based nanomaterials with porous architectures. In particular, in-plane holes are capable of accelerating ion transport across the graphene sheets and ultimately accessing the inner electrode surface. Here, a comprehensive review of holey graphene-based nanomaterials is presented, which summarizes recent progress from their rational design and controlled synthesis to their applications in electrochemical energy storage. Finally, perspectives on the future directions of their large-scale synthesis and advanced assembly protocols as electrodes are proposed and discussed.



中文翻译:

多孔石墨烯用于电化学储能

石墨烯及其杂化物因其引人入胜的理化特性而被认为是有前途的电化学能量存储候选物。但是,它们的面积或体积能量密度不令人满意,并且速率性能相对较差。这些缺点是由于在电极组装过程中石墨烯纳米片的团聚和重新堆积而导致有限的可及表面积和较差的离子扩散能力。为了解决上述问题,采用了在石墨烯平面上的穿孔,这赋予了具有多孔结构的石墨烯基纳米材料。特别地,面内孔能够加速离子穿过石墨烯片的传输并最终进入内部电极表面。在这里,对多孔石墨烯基纳米材料进行了全面综述,其中总结了从合理设计和受控合成到其在电化学储能中的应用的最新进展。最后,提出并讨论了其作为电极的大规模合成和先进组装协议的未来方向。

更新日期:2020-10-30
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