Pristine Graphene for Advanced Electrochemical Energy Applications
Pristine Graphene for Advanced Electrochemical Energy Applications
复制标题
用于先进电化学能源应用的原始石墨烯
DOI：
10.1016/j.jpowsour.2019.226899
复制
发表时间：
2019
影响因子：
9.2
通讯作者：
Li Cheng Chao
中科院分区：
文献类型：
--
作者：
Du Wencheng;Geng Hongbo;Yang Yang;Zhang Yufei;Rui Xianhong;Li Cheng Chao
无缺陷原始石墨烯（PG）的制备和应用研究是一个热点。然而，大规模无损地将石墨剥离成单层PG仍然是一个挑战。剥离石墨的常用方法是基于氧化-剥离-还原策略。然而，由于过度氧化和不完全还原过程，这种方法生产的石墨烯存在许多结构缺陷，这显着恶化了石墨烯的固有性能。因此，研究人员尝试开发非氧化化学/物理方法，在不损坏sp2碳晶格的情况下直接将石墨剥离成PG层，并将基于PG的材料和结构用于各种应用。在此，我们回顾了通过非氧化化学方法将石墨直接剥离成PG的最新进展。首先，我们概述了基于不同作用力和液体介质的各种去角质系统，这是决定最终去角质效果的两个关键因素。然后讨论了 PG 片材的结构质量。最后，我们详细总结了PG材料的多样化电化学能源应用，并为PG材料未来的商业化发展提供了一些展望。
The research on preparation and application of defect-free pristine graphene (PG) is a hot topic. However, large-scale non-destructive exfoliation of graphite into single-layered PG still remains a challenge. The common method of exfoliating graphite is based on the oxidation-exfoliation-reduction strategy. Nevertheless, there are many structural defects for the graphene produced by this approach due to the excessive oxidation and incomplete reduction processes, which significantly deteriorate the intrinsic properties of graphene. Therefore, researchers attempt to develop non-oxidative chemical/physical methods to directly exfoliate graphite into PG layers without damaging the sp2carbon lattice, and utilize PG-based materials and structures for various applications. Herein, we review recent development on the direct exfoliation of graphite into PG via non-oxidative chemical methods. Firstly, we outline the various exfoliation systems based on different acting forces as well as liquid media, which are two key factors determining the ultimate exfoliation effect. Then the structural qualities of the PG sheets are discussed. Finally, we summarize in detail the diverse electrochemical energy applications of PG materials, and provide some perspectives for the future developments of PG materials towards commercialization.