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III.B.2 Large Format Lithium-Ion Cells with Higher Energy Density Nine – NETL, O’Driscoll – Dow Kokam Figure III - 45: Thermal behavior of a high voltage NMC material when charged to various voltages High Capacity Cathode Material. A lithium-rich oxide material has been selected by WDT as the HCC material. The capacity of the material synthesized using lab-scale equipment has achieved >260 mAh/g of capacity. However, the usable capacity decreased when synthesized using an affordable technique, Table III - 10. Table III - 10: Characteristics of HCC by various synthesis methods. Given the limited resources available for this effort, Dow Kokam decided to stop the development of affordable synthesis techniques. Instead, we will acquire other HCC materials from commercial suppliers. Conclusions and Future Directions Baseline cell test results show that the design and fabrication are suitable to produce cells with the same performance as commercial, large format, cells manufactured by Dow Kokam. Cells have been delivered to Argonne National Laboratory for testing. Dow Kokam evaluated the cell performance of HCA materials and demonstrated >2,500 mAh/g of specific capacity. However, the performance is sensitive to the electrode design and matching between the HCA and the cathode. Dow Kokam will optimize the electrode design to improve cell performance. Dow Kokam has satisfied the goal of >500 Wh/L in energy density using HVC and graphite anode. It will continue to improve the energy density of cells using HVC and silicon- based HCA. Due to the difficulties to synthesis the HCC affordably within limited resources, Dow Kokam will stop the work at WDT and source HCC material from commercial suppliers. DK believes, from the results obtained so far, it is moving in the right direction and will continue with the development of cells with HVC and HCC. FY 2013 Publications/Presentations 1. 2. 2013 DOE Annual Peer Review Meeting Presentation 2013 Technical Review Meeting Energy Storage R&D 68 FY 2013 Annual Progress ReportPDF Image | Advanced Battery Development
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