Method for preparing graphene by liquid-phase ball milling exfoliation

US11167992B2 · kind B2 · utility

Assignee

• GUANGZHOU SPECIAL PRESSURE EQUIPMENT INSPECTION AND RESEARCH INSTITUTE · CN

Inventors

• Bo Yang · Nanhu, CN
• Shuanghong ZHANG · 流花街道, CN
• Maodong Li · 流花街道, CN
• Wei ZHAI · 流花街道, CN
• Fang Wen · 流花街道, CN
• Yue Li · Qingdao, CN
• Huachao Guo · 流花街道, CN
• Zhigang Wang · Lexington, US
• Guojia HUANG · 流花街道, CN
• Shiping Li · Los Altos, US
• Zhenling Wu · 流花街道, CN
• Yingyi He · 流花街道, CN

Key dates

• Filing date: Jul 1, 2019
• Grant date: Nov 9, 2021
• Expiry date: May 20, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C275/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Provided is a method for preparing graphene by liquid-phase ball milling exfoliation, including following steps: mixing a transition metal halide salt, a nitrogen source substance and an organic solvent to prepare an intercalation agent; mixing the intercalation agent with graphite, carrying out ball milling, and then performing centrifugation to obtain a graphite intercalation compound; washing and filtering the graphite intercalation compound obtained, adding an expansion agent, and carrying out ultrasonic agitation to obtain a graphene dispersion; and washing, filtering and drying the graphene dispersion to obtain graphene powder.