High Capacity Li Battery with 3D electrodes
Through our sister firm HE3DA, s.r.o. we are developing an entirely new design of lithium battery using nano-materials. The design of this new generation of lithium battery is based on the 3D (thick-layer) architecture of the electrodes.
The new design of Li battery we have developed makes possible construction of batteries with the following characteristics: Nominal cell voltages of 1.5V, 2.8V, 3.2V, 4V and 4.5V, depending on the active materials used and the combinations thereof.
- Cathode up to 2000 kWh/m3
- Anode 200 to 3000 kWh/m3
- Weight parameters depend on the amount and capacitance of the materials used. 3D modules are slightly lighter than 2D cells.
Cyclability and life of batteries
- This is the subject of further research and development – so far 200 cycles have been achieved
- The entire battery can typically be charged and discharged in less than 24 hours and again cycled
- Normally charging to more than 30% takes about two hours
- Discharge is much quicker, thanks to a decline in potential – typically 30% in 15 minutes
- After technical problems in specific types of batteries are overcome, their life is expected to exceed 5000 cycles
Typical and fastest times for charging/discharging
- Typical charging in the super-safe zone below the breakdown point of electrolyte – 8 hours
- Typical discharge in up to one hour
Required investment (per kWh and per kW)
- An accurate assessment is the subject of further development, but is estimated to be about 1/5 the cost of existing 2D technology
Total cost for one cycle
- The efficiency of a cycle can exceed 90%; typically it is 70%
- Cost is the subject of further research and development, however, an expert estimate is less than 0.50 USD per Wh of energy storage capacity with a life of 1000 cycles.
- Tolerates charging at more than one hundred percent of rated voltage
- From measurement on a small scale, charging of the batteries appears to be easy to regulate (no Li battery can be galvanostatically charged without risk, rather, they must be charged at constant potential. In a 3D module current falls gradually to zero)
Range of operating temperatures
- Temperature is controlled by cooling, but the battery works much better at higher temperatures than 2D batteries. Other than electrolyte, it does not contain organic materials. It is safer and depending on the active materials used, can operate for long periods at 80o C.
- Simpler and safer than with 2D batteries
- Micro-batteries for electronics
- Stand-by power source for electronics
- Batteries for electronics
- Batteries for small appliances such as electric drills and shavers
- Batteries for electric vehicles
- Batteries for large transport vehicles (providing additional energy for acceleration)
- Batteries for stabilization of electrical networks (“smart grids”) - 2-5 MWh modules
- Batteries for storage of electrical energy from 100 to 1000 MWh
Research and testing of the HE3DA concept will lead directly to its practical use in batteries for specific purposes. We are seeking a strategic partner for development of these batteries and launching them into production.