Controlled microstructure of batteries to increase energy density
- Disposable and rechargeable batteries
- Low tortuosity
- High energy density
- Maintains high active materials volume fraction
The pore space in rechargeable batteries has a high tortuosity that causes energy density of the battery to be limited at a given power level. Researchers at Berkeley Lab and MIT have developed a design and manufacturing process of aligned-porosity, high energy density and low tortuosity electrodes. Such electrodes are manufactured by a directional freeze-casting process that involves a ceramic suspension of solid particles in a liquid that produces unidirectional crystals. The invention also provides means to manipulate the porosity and microstructure of the ceramic structures by changing the processing parameters such as initial slurry concentration.
STATUS: Issued U.S. Utility Patent 9,065,093.
FOR MORE INFORMATION: Contact MIT Technology Licensing Office: http://technology.mit.edu/technologies/14844_high-energy-density-low-tortuosity-battery-electrodes-and-methods-of-manufacture