Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Lithium-Sulfur battery at home?
seilgu
Harmless
*




Posts: 7
Registered: 24-10-2014
Member Is Offline

Mood: No Mood

[*] posted on 10-1-2020 at 03:26
Lithium-Sulfur battery at home?


I'm a newbie that has only done ferrofluid and chlorate cells.

I'm recently interested in making a Li-S battery at home. I don't know how to start, anybody else interested?

Seeing the sulfur ring S8 becoming Li2S4, Li2S2, LiS should be fascinating, and by watching how the battery runs in real time we can probably see the dendrite growth and try adding stuff to suppress it. It could be fun.

So it seems that Li2S turns into HS when in contact with water, one can either increase the pH to reduce that, or eliminate the water in the atmosphere. I plan to build a glove box with Argon gas protection. Or maybe if we seal the battery under a film of oil or some inert liquid, it could work?

And I'm not sure what chemicals I should start with. Probably get some LiOH or LiCO3 solution, and use some binder to make a sulfur electrode.

I'm asking here because I'm concerned if there's any potential danger I didn't think of. Besides the toxic HS which should be easy to detect, and fire hazards that could possibly fume a lot. Is there any other danger?

[Edited on 10-1-2020 by seilgu]
View user's profile View All Posts By User
Ubya
International Hazard
*****




Posts: 903
Registered: 23-11-2017
Location: Rome-Italy
Member Is Offline

Mood: I'm a maddo scientisto!!!

[*] posted on 10-1-2020 at 05:12


have you read any papers on the subject?




---------------------------------------------------------------------
feel free to correct my grammar, or any mistakes i make
---------------------------------------------------------------------
View user's profile View All Posts By User
seilgu
Harmless
*




Posts: 7
Registered: 24-10-2014
Member Is Offline

Mood: No Mood

[*] posted on 10-1-2020 at 23:46


@Ubya I read a few but I don't think the papers cover the basics on how to get started with a DIY battery lab.

What I'm looking for is how to get started, or if possible, a way to make the electrolyte myself, which I think consists of lithium polysulfides. I've read a bit on the synthesis, but not yet enough to determine whether it's safe to do it at home. Basically what I know is that if there's water present, hydrogen sulfide will be produced, but under basic conditions it's reduced, yet I don't know if the amount presents a hazard.

If I can find a way to make the electrolyte safely, the rest will probably be my own experimentation and would require no further help.
View user's profile View All Posts By User
Sulaiman
International Hazard
*****




Posts: 2724
Registered: 8-2-2015
Location: Walsall UK but on extended Holiday in Malaysia
Member Is Online


[*] posted on 11-1-2020 at 01:35


I'm not proficient in electrochemistry, but a quick read makes me think that you are aiming very high : https://en.wikipedia.org/wiki/Lithium%E2%80%93sulfur_battery
and
Attachment: eaay2757.full.pdf (4.7MB)
This file has been downloaded 31 times

Your progress will be limited
(due to your lack of access to an electron microscope, and similarly expensive analytical and diagnostic tools, and knowledge)
by cost, available space, time, effort and luck,
as this looks to me a little like Eddison developing the lightbulb
- try hundreds of approaches until one works.

If recent research in a University laboratory only achieved 200 charge-discharge cycles (.pdf above)
what is your aim ?
(e.g. if just a few charge-discharge cycles is enough, then ok, go for it)

I personally would not start in this direction because I'm neither dogged nor patient enough,
but I will be interested in your progress and I wish you well.

I hope that you will adopt suitable safety precautions.

welcome to SM




CAUTION : Hobby Chemist, not Professional or even Amateur
(suffering from separation of me and my chemistry stuff)
View user's profile View All Posts By User
clearly_not_atara
International Hazard
*****




Posts: 1658
Registered: 3-11-2013
Member Is Offline

Mood: No Mood

[*] posted on 11-1-2020 at 21:09


Liquid-electrolyte/solid-electrode lithium-sulfur batteries are extremely complicated and would not be feasible to construct. Research on these batteries is intense due to excellent theoretical properties; all of the best attempts use nanostructured electrodes that combine a high area:volume ratio with some engineered surface reactivity. It's not something you can make with off-the-shelf equipment.

By contrast, the liquid-electrode/solid-electrolyte sodium-sulfur battery is conceptually very simple, although the high operating temperature certainly poses some difficulty:

http://en.wikipedia.org/wiki/Sodium-sulfur_battery

It's simple: you have some liquid sodium, some liquid sulfur, and a solid in between that conducts Na+ ions. Sodium and sulfur are both liquid by 115 C, but you need to go all the way up to 300 C for a standard Na-S battery. This seems like something you could mess around with on a small-scale -- but it certainly wouldn't be easy!

[Edited on 12-1-2020 by clearly_not_atara]




[Edited on 04-20-1969 by clearly_not_atara]
View user's profile View All Posts By User
BaFuxa
Hazard to Self
**




Posts: 55
Registered: 18-9-2017
Location: Mars
Member Is Offline

Mood: Buzzing

[*] posted on 22-1-2020 at 09:07


Maybe you should investigate on the Zebra battery. Lots of patents lying around.

I think it is an exciting type of battery, which could be used as a secondary battery on a hybrid vehicle. It is one of my long term projects, just because it makes a good excuse to use sulfur and sodium :P




Potential counts for nothing until realized.
View user's profile View All Posts By User

  Go To Top