二维材料的凝胶化及电化学储能应用  

Gelation of Two‐dimensional Materials for Energy Storage Applications

作　　者：邓亚茜 吴志坦 吕伟 陶莹[2] 杨全红[2] DENG Yaqian;WU Zhitan;LV Wei;TAO Ying;YANG Quanhong(Shenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China;School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China)

机构地区：[1]清华大学深圳国际研究生院,深圳盖姆石墨烯研究中心,深圳518055 [2]天津大学化工学院,天津300350

出　　处：《高等学校化学学报》2021年第2期380-396,共17页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51972228)资助.

摘　　要：近年来,二维材料由于其独特的结构以及高电化学活性在储能领域中备受关注.然而在实际应用中,二维材料的“面-面”堆叠极大地限制了其性能的发挥.凝胶化作为实现纳米材料液相三维组装的重要手段,不仅可以有效减少二维材料的团聚,保留更多活性位点,同时形成的三维网络结构可以提供畅通的离子电子传输通道,提升材料在储能应用中的实用性.不仅如此,二维材料的凝胶化在电极材料孔结构设计以及活性物质缓冲空间定制方面具有先天优势.本文以氧化石墨烯凝胶化过程的方法和原理为基础,综合评述了石墨烯及其它几类较典型的二维材料的凝胶化机制及方法,梳理了其孔结构调控策略,并对凝胶化二维储能材料的设计以及应用进行了归纳、总结及展望.Due to the unique layered structure,exceptional electrical,and chemical properties of two-dimensional(2D)materials,large efforts have been investigated for their energy storage applications.However,as the consequence of the erratic aggregation and layer-by-layer restacking of 2D sheets,severe accessible surface loss preserves their outstanding properties in the practical applications.Gelation in solution is an advantageous way to achieve the self-assembly of nanomaterials with different structures.The prepared hydrogels exhibit interconnected pores and thus present a better utilization of the terminal active sites on 2D sheets and a higher permeability for mass transportation.Moreover,gelation also shows a superior value on the pore design which is conducive to the mass storage and void space tailor.In this paper,we discussed the gelation mechanism of graphene and its analogues starting from colloidal suspensions,summarized different ways of gelation methods,and listed the strategies for their structural control.In addition,research of 2D materials hydrogels featuring high electrochemical performance,multiple functions for energy storage devices are also viewed.

关 键 词：二维材料 凝胶化 三维组装 储能应用 

分 类 号：O648[理学—物理化学]