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Electrode Materials for Rechargeable Li-ion Batteries: a New Synthetic Approach (ANL-IN-10-031)

Argonne National Laboratory

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<p>
	This figure shows the high-rate performance of the new class of cathode materials featuring bi-layered structures.&nbsp; The highest current rate of 1500 mAg<sup>-1</sup> provides 150 mAhg<sup>-1</sup> discharge capacities over multiple cycles which enables Li-ion batteries with exceptionally high-power.</p>

This figure shows the high-rate performance of the new class of cathode materials featuring bi-layered structures.  The highest current rate of 1500 mAg-1 provides 150 mAhg-1 discharge capacities over multiple cycles which enables Li-ion batteries with exceptionally high-power.

Technology Marketing Summary

Since the performance of Li-ion batteries is largely predicated on the cathode performance in the cell, improvements to lower the irreversibility capacity loss on the first cycle, increase the rate capability, and improve structural stability at high voltages in the cathode are needed.  The objective is to synthesize and make new materials to address these issues.  High-energy density Li-ion batteries available in the market today have low power and progressively lose their energy due to voltage fade during cycling. Researchers at Argonne National Laboratory have created a new cathode material from new synthesis methods that can solve problems that are associated with conventional Li-ion high-capacity (energy) batteries.

Description

Using a novel alternative approach, Argonne researchers have synthesized new high-energy cathode materials for use in rechargeable Li-ion cells and batteries.  These Li-ion cathode materials consist of layered transition metal containing oxides that have a unique bi-layered domain structure produced by the synthesis method.  This new material allows for rapid Li intercalation/de-intercalation within the crystal, resulting in a cathode with very high rate and high-power capability.  Argonne’s invention provides for new, Mn-rich compositions in these cathodes and their associated synthetic route.  This layered cathode material containing low-cost Mn operates at high-rate and high-voltage, resulting in high-energy-density batteries with improved stability.  These cathodes therefore offer improvements in all aspects of battery performance.

Benefits

The primary benefit of the technology is higher-performance, more cost-effective batteries for PHEVs and HEVs. Cost is critical for implementation of new batteries in expanded transportation applications.   A high-performance cathode can reduce costs by lowering the number of cells needed in the battery pack and their associated hardware.  Traditional high-energy batteries utilize multistep processes to optimize a number of deficiencies in the cathode material. Since Argonne’s preparation process is simple for this new class of high-energy materials that involves only two steps, the manufacturing cost is easier, faster, and more cost-effective.

Applications and Industries
  • Aerospace and defense
  • Automotive and transportation
  • Portable communication and computers
  • Stationary energy storage
  • Medical
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
ANL-IN-10-031Development - Baseline materials are patented and have been implemented in full cells.Available02/07/201202/07/2012

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To: Elizabeth Jordan<partners@anl.gov>