You are mentioning about Li or electrolyte or both?

Ask the supplier about such details of the of stability/safety of your electrolyte solution(s), e.g. how long you can, temporarily, store it, in a 'glass(?)' bottle[1].

1. inside your Ar-filled GB.

It is better to store lithium in a glass bottle. In case if the glovebox conditions are getting worse you could visually quickly notice if the lithium has turn dark(due to nitrogen) or white powder(due to oxygen). For electrolyte try to store the stock solution in a aluminium bottle. As a general practice, use small portions separately ( 5 or 10 ml) for 2 weeks maximum and store them in nalgene bottles. You cannot store LiPF6 containing electrolyte solutions in glass vials, since LiPF6 reacts with glass and produce HF which is detrimental for batteries. If you cannot find an aluminium bottle then store in a large nalgene bottle the stock solution.

https://www.sigmaaldrich.com/AU/en/product/sigma/b9282?gclid=EAIaIQobChMItsbB39za8gIViYeRCh1xEADLEAAYASAAEgJ4HfD_BwE

Thushan Pathirana thanks. Nalgene means high-quality polypropylene or high density polypropylene bottles will do the job for electrolyte?( Same bottles from Tarson are easily available in India)

About Lithium , for long can we store it inside the glass? Any idea?

Ritesh Yadava , HDPE will do the job for the electrolyte. If you are using additives such as FEC then you need to be careful. Since FEC is light sensitive, then you need to wrap the nalgene bottle with aluminium foil. For lithium you can store inside a glass bottle, make sure you tighten it very well, incase the glovebox get contaminated it will still protect your lithium for a short period of time until you purge and rectify the problem. Hope this helps!

Thushan Pathirana Thanks. Can the same HDPE bottle be reused for storing electrolytes after cleaning or do we need a new HDPE bottle?

Will LiPF6 stored for more than 2 weeks in HDPE bottles will decompose? Should we throw the leftover electrolyte after that?

Lithium-ion batteries are very sensitive, even a few ppm content of an impurity could significantly impact the cell performance. This is why we always try to have a stock solution separately and for immediate use pipette out a portion such as 5 - 10 ml from the stock solution into a small vial. You might open and close this vial few times during cell making, touch different surfaces etc. Therefore, after 2 weeks there might be even a slight probability that it could get contaminated. Reusing and recycling is good practice, but as I mentioned the sensitivity with impurities is imperative. Therefore, my personal advice is to use new vials and containers as they are not really expensive.

Commercial LiPF6 in a carbonate-based solvent electrolytes from Sigma are supplied in aluminum bottles (100 ml samples). The do the job well.

Polypropylene bottles are good as well.

Li metal can be stored in a glass or plastic container. I recommend to have it hermetically sealed in case glovebox accidents or frequent work with solvent inside the GB - it pays off in a year perspective.

Ievgen Obraztsov What kind of plastic container do you mean?Kindly suggest material name.

@Ritesh Yadava

I used 50-ml Eppendorf tubes for Li metal storage, it perfectly works, inert, hermetic and don't take much space in the GB.

Ritesh Yadava you can buy Aluminium bottles to store your electrolyte. They are easily available on https://www.gunatitprocessing.in/. Just call them and ask for few samples. They will provide you on payment basis. Their quality of Aluminium bottles is very good. To store Li chips use any polymer container. Hope it helps.

Don't use glass for electrolytes containing LiPF6. Any HF generated will etch the glass.

This is why Al or nalgene works best.

Glass is best for ethers-based electrolyte as it leaks through nalgene