Preparation method of SnO2@Sn coated reduced graphene oxide composite material

US11688850B1 · kind B1 · utility

Assignee

• GUANGDONG UNIVERSITY OF TECHNOLOGY · CN

Inventors

• Miao He · Sunnyvale, US
• Shanshan Wu · Zhejiang, CN
• Yefeng FENG · 流花街道, CN
• Kaidan Wu · 流花街道, CN
• Deping XIONG · 流花街道, CN
• Li Chen · 流花街道, CN
• Kunhua Wen · 流花街道, CN
• Zuyong Feng · 流花街道, CN

Key dates

• Filing date: Jan 23, 2022
• Grant date: Jun 27, 2023
• Expiry date: Feb 4, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A preparation method of SnO2@Sn coated reduced graphene oxide composite material. By compounding reduced graphene oxide and SnO2, SnO2 undergoes conversion and alloying reactions to form Sn nanoparticles, and the three components have a synergistic effect and good reversibility. Nano SnO2@Sn particles are uniformly distributed on the ultrathin RGO nanosheets. RGO can effectively alleviate volume expansion caused by SnO2 and prevent SnO2@Sn nanoparticles from agglomeration during cycle. The adhesion of SnO2@Sn on RGO can also effectively reduce the repacking of RGO nanosheets, so that the composite material maintains a large surface area during the charge-discharge process, providing sufficient space for the storage of potassium ions. Therefore, the prepared SnO2@Sn coated reduced graphene oxide composite material (SnO2 @Sn@RGO) has excellent electrochemical performance, exhibits excellent cycle performance, rate capability and long-term cycle stability, and has a very ideal first coulomb efficient.