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dpack

Joined: 02 Jul 2005
Posts: 43839
Location: yes

Posted: Sun Mar 23, 25 6:14 pm Post subject:
is the 1kv kit public proof?

Mistress Rose

Joined: 21 Jul 2011
Posts: 16257

Posted: Mon Mar 24, 25 8:29 am Post subject:
If lithium can be reclaimed from waste or from things like spoil heaps of china clay, then the price should drop and the extraction be more ethical and cleaner. Sodium is more easily obtained than lithium, so long term it might have advantages.

dpack

Joined: 02 Jul 2005
Posts: 43839
Location: yes

Posted: Mon Mar 24, 25 6:58 pm Post subject:

making Na metal is a bit moody, no worse than smelting steel and a lot safer than playing with "hot cell stuff"

thermal Pu to steam to personal vehicle has less merit that a nitrocellulose fireguard

any of the above are loads safer than burning oil as a default energy source

even as a metal Na is sort of ok, at least it is predictable

sodium azide, ummmm

i did tell them what it was and what it could do, some folk do not read labels or documentation and then they whine about me destroying their plant

approx 500 gm of sodium/sodium azide is the most disturbing thing i found in a chemical store
very elderly diethyl ether is ok unless it breathes, accidental lead picrate is safe if moistened etc etc

i have played nitrations small and unknown and very personal, then big after that, town is still where it was

Mistress Rose

Joined: 21 Jul 2011
Posts: 16257

Posted: Tue Mar 25, 25 7:57 am Post subject:

When I worked in the chemistry lab we had a lot of Winchesters of sodium cyanide in the bottom of the chemical cupboard courtesy of a previous Chief Chemist who had an idea about making up his own cyanide plating bath. While I was there a new Chief Chemist was appointed and he had them removed by a specialist company. The one in between made a small amount of an explosive, who's name I can't 50 years on, remember. I have a feeling it was a sodium iodide of some sort, and it was evaporated on filter paper which was then broken up and scattered on the floor so anyone walking on it had tiny explosions under their feet. He threatened me with instant dismissal if I tried the same thing.

dpack

Joined: 02 Jul 2005
Posts: 43839
Location: yes

Posted: Tue Mar 25, 25 12:09 pm Post subject:

ammonium.........

fairly harmless

vehicle airbags are very rapidly filled with a tiny amount of semi stable azide (no idea what types they use) as propellant with an electric starter

azides are not for me , ever, a silver bracelet and an ice car is a recipe i know and i will never use

bimetal salts is a harmless euphemism for death wish

that sodium azide is the scariest substance i have handled, there have been a few

if i was in that situation again i would phone Catterick UXO and ask if they were busy today

dpack

Joined: 02 Jul 2005
Posts: 43839
Location: yes

Posted: Tue Mar 25, 25 12:27 pm Post subject:
unstable and keen on entropy vs toxic as a cupboard find i much prefer toxic

Slim

Joined: 05 Mar 2006
Posts: 6671
Location: New England (In the US of A)

Posted: Tue Mar 25, 25 2:24 pm Post subject:
Descriptions of hydrofluoric acid always made me a bit anxious

dpack

Joined: 02 Jul 2005
Posts: 43839
Location: yes

Posted: Tue Mar 25, 25 7:24 pm Post subject:
F if it is contained it might be safe, loose is no longer contained U and 6F is spin city F as a salt is ace for dental care i have never played with it, Cl and Br are "interesting" in elemental form Cl I and Cl Br are very interesting, odd crystal forms, and daft corrosive/unpleasant as "simple chems" might be rated

Mistress Rose

Joined: 21 Jul 2011
Posts: 16257

Posted: Wed Mar 26, 25 8:48 am Post subject:

Hydrofluoric acid is nasty. I have used fluoboric acid and that was the only time I was actually instructed to wear gloves. We used to do tin/lead plating and the bath was fluoboric acid based. The gold was cyanide based. I also had an electroless copper tank that was black and thick in appearance with copper coloured bubbles. Most people wouldn't go near it as it looked as if something nasty was about to emerge. By most standards even the larger plating baths we were using were quite small, and the plating line I set up was even smaller, so not on what you might call an industrial scale where they can be the size of swimming pools.

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28264
Location: escaped from Swindon

Posted: Sun Mar 30, 25 2:30 pm Post subject:

Battery claims
The following link is to the complete list of claims I have been compiling.

https://martindavidwalker.blogspot.com/2024/09/battery-claims.html

The new claims in the last week are as follows.
March 28th 2025, Hina launches Sodium EV batteries
The batteries boast 165wh/kg which is virtually on a par with many LFP batteries and can cope with 8000 fast charges and low temperatures. So on a 200 mile range battery that would be 1.6 million miles.
On the subject of sodium I'm starting to see adverts for home sodium batteries. The home is where cycle life becomes important. If my car battery only lasts 1000 cycles it probably wouldn't bother me. But a home battery could cycle twice a day in intense use. 1000 cycles then becomes 18 months. LFP can be as low as 3000 which is still under 5 years. 8000 takes us to over 10 years intense use.

https://cnevpost.com/2025/03/28/hina-sodium-ion-battery-solution-commercial-cars/
March 21st 2025, CATLs second generation Sodium battery
The claim is that it approaches LFP performance metrics with significant cost advantages. Notably it has been a set back for Sodium that the price of Lithium has come down drastically from its peak, but notably even then Lithium was just 25% of the cost of producing a battery pack. So with Lithium down 80% from it's peak in 2022 one has to ask if the significant cost advantage comes in production as well as materials? But as batteries become commodities â€œsignificantâ€ can mean just a few percent!
https://autonews.gasgoo.com/new_energy/70036285.html

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28264
Location: escaped from Swindon

Posted: Sun Apr 06, 25 2:45 pm Post subject:

Did the trip to see Amipest, a journey that strikes me as a pain in a typical EV, but because the M3 has a closure we took a longer route back via M40, M4 and A34 unlike the M3 route where services are a pain, this route has I think 5 motorway services.
So it does come down to how much does it matter if it's not a trip being done that often?

Battery claims
The following link is to the complete list of claims I have been compiling.

https://martindavidwalker.blogspot.com/2024/09/battery-claims.html

The new claims in the last week are as follows.
April 1st 2025, Californian start-up Inlyte partners with Swiss manufacturer Horien on Sodium Iron Batteries.
Claims of very long life batteries with costs as low as $35 kwh. That translates to 0.3 cents a kwh when used as grid storage using readily available materials.
It really makes a mockery of Nuclear and non battery storage solutions.
https://newatlas.com/energy/sodium-iron-battery-storage-inlyte/

Nicky cigreen

Joined: 25 Jun 2007
Posts: 9930
Location: Devon, uk

Posted: Mon Apr 07, 25 11:58 am Post subject:

jema wrote:

I think you are right, it probably doesn't matter if it isn't something that you need to deal with very often. Out of curiosity, how far were you travelling, how often did you have to stop to recharge? and how long did each stop have to take for a recharge?

near me a site that once was a little chef has become one of the largest charging stations in the county, and the shop is a farm shop with cafe - it's become a popular stopping point.

dpack

Joined: 02 Jul 2005
Posts: 43839
Location: yes

Posted: Mon Apr 07, 25 2:57 pm Post subject:
muskie is scared of and challenged by them being better than him at making stuff(the money is irrelevant by now) BYD etc are his emotional problem far more than an economic one trump is arserelevant, old man doing beard for the players just a name on a brand

jema
Downsizer Moderator

Joined: 28 Oct 2004
Posts: 28264
Location: escaped from Swindon

Posted: Tue Apr 08, 25 6:20 am Post subject:

Nicky cigreen wrote:

jema wrote:

I don't actually have an EV, but pretend I do on long journeys. Mostly the hypothetical EV wins on time because it would start full.
this trip is designed to be awful for EVs. But still is only more inconvenient in that I would have to take the pain of stopping on the journey day.

Nicky cigreen

Joined: 25 Jun 2007
Posts: 9930
Location: Devon, uk

Posted: Tue Apr 08, 25 9:19 am Post subject:

jema wrote:

Nicky cigreen wrote:

jema wrote:

oh, I thought you had a nissan leaf - I wonder who i was thinking of then.

A useful exercise then.

I think an enforced stop isn't a terrible thing, we just need to adjust to accepting it.

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