[RE-wrenches] Sodium Ion vs Lithium Article

[Bradley Bassett]

I've heard that the voltage range of the available SI batteries is very
wide, which might make their use with current inverters in our field
difficult. Sort of like the Aquion battery.

On Thu, Dec 4, 2025 at 9:00 AM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi Christopher
>
> I ve been following SIB for quite a while. And while it’s still early days
> the progress has been staggering.
>
> According to CATL SIB are in production at roughly $20 kWh with expected
> $10 in less than a year.
> They are producing cars in China with SIB. BYD is also producing them.
>
> Current energy density is about 175 and is going up.
> Cycle life is 10-20,000
> C rates are much higher than LFP which is one reason they are being used
> in cars
> Temperature range is dramatically higher than LFP meaning no HVAC is
> needed in almost all applications
> Efficiency seems to be a bit lower than LFP but the lack of hvac means you
> do get some of that back. There is a company in the US that is building
> BESS without hvac
> They are significantly safer in regards to fires and also even more
> environmentally friendly
>
> One data point is that CATL has 120,000 engineers, Tesla has 80,000 total
> employees
>
> We are witnessing a new generation of battery tech, that will help change
> the cost dynamics of cars and BESS
>
>
>
>
>
>
> > On Dec 3, 2025, at 9:52 AM, Christopher Warfel via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
> >
> > A person sent me the attached article on Sodium Ion batteries as a
> competitor to Lithium.  I thought it might be of interest to the WRENCHES
> folks.   Chris
> >
> > --
> > Christopher Warfel, PE
> > ENTECH Engineering, Inc.
> > PO Box 871, Block Island, RI 02807
> > (401) 447-5773
> > <Sodium v Lithium batteries.pdf>
> > _______________________________________________
> > List sponsored by Redwood Alliance
> >
> > Pay optional member dues here: http://re-wrenches.org
> >
> > List Address: RE-wrenches at lists.re-wrenches.org
> >
> > Change listserver email address & settings:
> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> >
> > There are two list archives for searching. When one doesn't work, try
> the other:
> > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> >
> > List rules & etiquette:
> > http://www.re-wrenches.org/etiquette.htm
> >
> > Check out or update participant bios:
> > http://www.members.re-wrenches.org
> >
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20251204/d531ef11/attachment.htm>