Large-scale production of holey graphite as high-rate anode for lithium ion batteries

• 作者: Bo Hong Chunmao Huang Feng Xiao Jiakui Zhang Jiantie Xu Tong Hu Xianghong Chen
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（9）
• 页码范围: 122-127
• 页数: 6页
• 语种: 英文

摘要

Lithium ion batteries (LIBs) have been widely used in portable and smart devices because of their high energy densities, long cycle life and environmental friendliness.In order to meet the evergrowing demand for human-beings utilizing electronic devices,electric vehicles and energy storage grids, it requires LIBs with much higher power and energy densities [1].As a core of LIBs, the electrode (including cathode and anode) materials largely determine the development of LIBs.Over the past decades, a large number of anode candidates have been developed to replace graphite,the most commonly used commercial anode, with the limited theoretical capacity (372 mAh g-1) and poor rate capability.Among the candidates, graphene and its analogues (e.g., graphene derivatives and their related composites) have attracted great attention owing to their overwhelming physical properties of large surface areas, high electrical conductivities, excellent mechanical flexibilities, as well as chemical stabilities [2].Despite the high theoretical capacity and promising electrochemical performances reported, the charge/mass-transfer capability of graphene based materials as anodes for LIBs remains challenges [3].One of the great challenges is the strong van der Waals interactions between graphene nanosheets leading to the easy restack and agglomeration during the electrode preparation and discharge-charge process.