CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Deliverables
Advanced high energy negative electrode in high energy cells LIP40:
Further optimisation of cycle life and power capability within a wide temperature range (80°C-30°C).
Electrodes prepared with the new materials developed during the project are introduced into prismatic Li-Ion high energy cells characterized by a nominal capacity of 40Ah (LIP40 cells). These cells are developed to serve in high energy batteries for 42V power supply systems in conventional cars.
The energy content with Lithium Manganese Oxide (Spinel) as positive active material at low rate C/3 is162Wh/Cell and 114Wh/kg. The pulse power in discharge is 659W/Cell (30s) at 200A at 20°C. The cycle life of these cell is 900 cycles over 100% DOD at a rate of C/3.
With other positive active materials NBT expects to increase power performance and cycle life. Advanced electrolytes are available to improve the low temperature performance down to -30°C. The high temperature performance of the cells is limited by capacity loss due to predatory reactions. Further development in active materials and electrode recipe will address this problem.
Schunk Kohlenstofftechnik GmbH has developed a production process for graphite materials based on Repsol raw materials to be used in rechargeable lithium ion batteries. The resulting graphites are characterised by:
- A low BET surface area of<=1.0m²/g.
- An adaptable grain size distribution according to the individual demands of the battery type.
- Specific capacities of 330 to 350mAh/g at a first cycle efficiency of more than 90%.
- A cost reduction potential of more than 50% compared to frequently used high performance carbon materials for Lithium Ion Batteries.
REPSOL YPF has developed a new special coke, which has been optimised as raw material for the production of special graphite to be used as a component (anode) in Li-ion rechargeable batteries. The green coke is obtained by an exclusive coking process for a specially design blending of different feedstocks from side streams and residues of our refineries. The green coke is characterised by a particular high content of sulfur, nitrogen and different metals which combination gives rise during graphitisation to a singular graphite which electrochemical performance (specific capacity>=339mAh/g; efficiency>=90%) once properly graphitised is better than that of current electrochemical graphites obtained from commercial coal tar pitch BPAMs. Actually, REPSOL YPF is able to produce this material at industrial level upon demand, and it could be an excellent low price raw material for electrochemical and other graphites, that may be of interest of graphite producers.
42V battery with LIP40 cells:
- Further development of the thermal and electrical battery management system.
- Optimisation of the power capability on the system level.
- Preparation for car integration.
Several items concerning the battery management are not yet satisfyingly solved. Those items are:
- Equalisation of cells during operation of the battery.
- SOC determination, state of health determination.
- Prediction of power performance.
- Evaluation of the cooling system, optimisation of the heat exchanger.
Additionally the battery weight has to be minimised. With the integration of new cells with improved material, the power performance (currently 6.8kW(30s) discharge and 6.7kW(15s) charge at RT) will be extended to low temperatures.
Advanced high power negative electrode in high power cells LIR6. Negative electrode optimised for high power application with advanced graphite powders prepared from low cost precursors. LIR6 round cells (6Ah) will be introduced into high power batteries for hybrid electric vehicles.
Negative thin film electrodes for high power application with Li-Ion cells are a highly innovative product. Electrodes prepared with the new materials developed during the project are introduced into Li-Ion high power cells characterised by a nominal capacity of 6Ah. These cells are developed to be employed in high power batteries for hybrid electric cars.
The continuous power capability with Lithium Manganese Oxide (Spinel) as positive active material at 8.3ºC is 437W/kg at 35Wh/kg, the pulse power in discharge is 309W/Cell (18s) and 0.85kW/kg (18s). The cycle life of these cells is 30000 pulse cycles following a cycling scheme outlined in the document issued by the EUCAR Group: 'Specification of TEST PROCEDURES for HYBRID ELECTRIC VEHICLE TRACTION BATTERIES. September 1998'.
With new positive active materials NBT expects to increase power performance and cycle life of the cells. It is planned to build high power batteries from these cells.
REPSOL YPF has developed a new special coke, which has been optimised as raw material for the production of special graphite to be used as a component (anode) in Li-ion rechargeable batteries. The green coke is obtained by a exclusive coking process for a specially design blending of different feedstocks from side streams and residues of our refineries. The green coke is characterised by a particular very low content of heteroatoms as sulfur, nitrogen and metals, which makes possible an easy graphitisation process (low emissions) and gives rise to a singular graphite which electrochemical performance (specific capacity>=350mAh/g; efficiency>=90%) once properly graphitised is better than any other non-doped current electrochemical graphites obtained from any commercial precursor. Actually, REPSOL YPF is able to produce this material at industrial level upon demand, green and calcined (with controlled particle size), and it could be an excellent raw material for electrochemical and other graphites, that may be of interest of graphite producers.
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