Silicon Investor (SI) -- The First Internet Community

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : VALENCE TECHNOLOGY (VLNC) -- Ignore unavailable to you. Want to Upgrade?

To: Zeev Hed who wrote (7128)	1/15/1999 2:02:00 PM
From: kolo55	Read Replies (2) \| Respond to of 27311

Thanks for the comment- I agree. You wrote:Paul, I do not know the specifics on this issue. From a pure thermodynamic point of view, cobalt based system should be superior in this respect, but there are obviously some other factors coming into play. I do not know the details, it would depend a lot on the specific combination of the anode and the electrolyte. I would not be surprised if the nature of the electrolyte had more to do with high temperature charge retention then the electrodes. VLNC has some pretty smart ways of making the electrolyte bearing polymer. We have to realize our limitations... our beautiful scientific models can only take us so far. Eventually we need experimental data to support and focus our theories. Without access to the experimental data, we can't predict some important characteristics of battery performance. In this case, if we have access to experimenters who do have access to that data, then we can seek to understand their conclusions and actions. Here is an article discussing the use of Manganese in current versions of Li-ion batteries. I'll clip a relevant comment: Roy Sueda, technical applications engineer at NEC Moli Energy, said the manganese-based lith- ium cells are significantly more tolerant of overcharge abuse and offer better thermal stability at higher temperatures than cobalt technology. These properties eliminate the need for sophisticated bat-tery-pack control cir- cuitry to protect the cell against overcharge, Sueda said. techweb.com Paul