公开(公告)号：US20230299263A1

公开(公告)日：2023-09-21

申请号：US18041571

申请日：2021-07-21

Applicant: Paul Scherrer Institut

Inventor： Ales Stefancic ,  Mario El Kazzi

IPC: H01M4/04 ,  H01M4/38 ,  H01M4/525 ,  H01M4/485

CPC classification number: H01M4/0471 ,  H01M4/382 ,  H01M4/525 ,  H01M4/485

Abstract: A method uses mild fluorinating agents, such as hydrofluorocarbons—HCFs, perfluorocarbons—PFCs, hydrochlorofluorocarbons HCFCs and chlorofluorocarbons—CFCs, to fine-tune the fluorination process in battery material preparation in order to obtain uniform nanometer-sized surface fluoride coated battery materials. The use of a vertical flow-type tube reactor permits a fine-tuning of the fluorination process by accurately regulating the active gas or mixture of gases flow over battery materials using mass-flow regulators, and precisely setting the temperature with vertical rube furnace. Additionally, these fluorinating agents have slightly different reactivity, decomposing and reacting with battery materials at different temperatures, and therefore, offering additional parameter of fluorination fine-tuning. The method is scalable and can be easily adapted as an industrial solution. Moreover, all these gases are non-toxic, non-corrosive and non-flammable gases at room temperatures, hence, they are more convenient to handle than highly-toxic and highly-corrosive HF and F2 gases.