Natural Swedish Graphite for Future Lithium-ion Batteries
Purpose and goal
The overall aim is to develop Swedish natural graphite powder in a sustainable manner to increase Woxna Grahite AB to become competitive for the lithium-ion battery market and for improving research knowledge about graphite in LIBs. There are three goals: 1) obtaining graphite powder with a particle size distribution between 1-30 m and with a particle form benefiting lithium transport in the material; 2) a method of purifying graphite from pollutants with as low environmental impact as possible; 3) creating graphite electrodes with a new process that can be commercialized.
Expected results and effects
The need is clear. A cost-effective and environmentally friendly anode material is needed. If the goals of the project are reached, Woxna Graphite AB can get a new method for producing high-purity graphite but also knowledge about what it takes to make working electrodes for LIB. The project also provides quality data for Woxna´s marketing of the graphite. The project also provides published research results with regard to which parameters of graphite in combination with binders and electrolyte in a battery that are important for the up-scaling of graphite for commercial batteries.
Planned approach and implementation
The work is done in two stages, each comprising 1 year. Stage 1 consists of four WP: 1) obtain 1 kg pure graphite powder with a particle size distribution of 1 to 30 m, 2) a method of creating ultra pure graphite, 3) potato-shaped graphite particles, and 4) graphite quality data that can be used for Woxnas marketing. Stage 2 consists of electrochemical studies of graphite powder as anode material in LIB. A screening of different binders is made for good electrodes and these are tested with high current for battery charging. The goal is a LIB that can handle 10C with a capacity of at least 250 mAh / g.