Tyler Hamilton, known to bloggers as the publisher of the Clean Break blog has authored a comprehensive article about EEStor that appeared in the January 22 issue of MIT's Technology Review. The article reviews the claims of the company, Tyler gets a rare interview with Richard Weir, EEStor's co-founder and chief executive officer and talks to several experts that are skeptical about the capacitor based electrical energy storage unit (EESU). The article was timed based on EEStores "milestone" announcement that was reported in an earlier post indicating:
1) That it remains on track to begin shipping production 15 kilowatt-hour EESU to ZENN Motor Company in 2007 for use in their electric vehicles.
2) An automated production line has been proven to meet the requirements for precise chemical delivery, purity control, parameter control and stability of its barium nitrate powder.
3) The company has completed the initial milestone of certifying purification, concentration, and stability of all of its key production chemicals notably the attainment of 99.9994% purity of its barium nitrate powder.
4) EEStor is now in the process of producing on its automated production line, composition-modified barium titanate powders and is moving toward completing its next major milestone of powder certification.
The EESU is projected to offer up to 10x the energy density (volumetric and gravimetric) of lead-acid batteries at the same cost. In addition, the ESU is projected to store up to 1.5 to 2.5 times the energy of Li-Ion batteries at 12 to 25% of the cost.
Tyler's article and the many comments that it generated (not of as good quality as my readers) are well worth the read.