High-yield liquid phase production of high-quality graphene via dimethylacetamide-ethanol mixed solvent system

被引：1
作者：
Lv, Tianxiang [1 ]
Luo, Luo [1 ]
Zhou, Chunhua [3 ]
Ying, Shuni [4 ]
Xie, Mingxing [4 ]
Ma, Huihuang [1 ]
Zhou, Xiaodong [1 ,2 ]
机构：
[1] East China Univ Sci & Technol, Sch Chem Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China
[2] East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China
[3] Waste Disposal & Water Supply & Drainage Affairs C, Yongzhou 425500, Hunan, Peoples R China
[4] Shanghai Weixing New Bldg Mat Co LTD, Shanghai 201400, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2025年 / 630卷
关键词：
Graphene; Liquid-phase exfoliation; Mixed solvent; Solid-liquid interaction; Layered materials; Supercapacitor; FEW-LAYER-GRAPHENE; BORON-NITRIDE NANOSHEETS; EFFICIENT EXFOLIATION; ASSISTED EXFOLIATION; AQUEOUS DISPERSIONS; SCALABLE PRODUCTION; ELECTRODE MATERIALS; PRISTINE GRAPHENE; CARBON; SUPERCAPACITOR;
D O I：
10.1016/j.jpowsour.2024.236149
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Producing graphene by Liquid-phase exfoliation (LPE) is an advantageous approach for its scalability and costeffectiveness. Solvent is an essential factor governing the yield and stability of graphene produced by LPE. However, current single solvents used in LPE are inadequate for producing high-yield graphene with high quality. We report a binary solvent strategy of dimethylacetamide and ethanol to improve the production of graphene. Hansen solubility parameters and Young's equation are employed to theoretically predict optimal solvent ratio. The as-prepared graphene is stable and defect-free, achieving concentration as high as 1.76 mg/ml (similar to 35 % by mass). The high-quality graphene exhibits an aspect ratio of 3000 along with high electrical conductivity of 588 S/cm. We propose that ethanol can rapidly insert into graphene layers by virtue of small molecular volume, synergizing with the stabilizing effect of DMAc, resulting in efficient exfoliation. The fabricated graphene supercapacitor exhibits high energy density of 66.39 Wh/kg and power density of 3583.27 W/kg with specific capacitance of 134 F/g and cycle stability for 93.2 %. The results here provide insights for the rational design of mixed solvent to promote the production of graphene, advancing the industrialization of graphene and its application.
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页数：10
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