| abstract |
The object of present innovation is to use 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 vertical flow type 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 tube 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 suggested 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 F<sub>2</sub>. |