A way to separate Lithium oxide layer from the Li-metal (in the glove box) is to heat it, fast[1], up to MP+T (MP=180.5°C, T

A way to separate Lithium oxide layer from the Li-metal (in the glove box) is to heat it, fast[1], up to MP+T (MP=180.5°C, T

I already answered 4 times !!! See my previous answers for similar questions (first, very old was about Li (I can't find), next one also (#1), two other - about Na (#2 and #3). In fact, situation for Li and Na is very similar).

1. https://www.researchgate.net/post/How_can_I_remove_the_outer_layer_formed_on_lithium_metal

2. https://www.researchgate.net/post/After_cutting_the_Na_cube_in_glove_box_it_turns_black_within_a_few_seconds_Will_it_affect_the_battery_performance

3. https://www.researchgate.net/post/I_was_wondering_if_there_was_a_better_way_to_store_dry_sodium_metal_in_a_glove_box

Very intresting discussion... The student asked and disappeared ... Maybe after the holidays, if he is still interested in this question, he will return to the problem. Depends on many circumstances. But the answers are ready!

Thanking you sir for the suggestion.

Color of the layer is white.

I have tried scratching with ceramic knife but surface becomes very rough. Also the impedance of the cell becomes as much as high.

See my answers. Briefly: I cleaned the lithium electrode blank by friction on a rough polyethylene surface just before the cell was assembled.

Thank you sir for suggestion. I will try

Is there will be an issue in the mpedance Spectra, if I am unable to scratch out completely the lithium oxide layer from the lithium foil ( foil thickness 0.3 mm ). Will it introduce another interference in the Spectra since I am getting only two semi circle ( cell configuration Li/saple/Li)

The 0.3 mm foil it is not thin imho. Thin foil is 0.05 mm or less... 0.3 mm foil it is quite possible to clean on rough polyethylene - read the links to my old answers.

Of course, if it is not oxidized through. Then you have to think about the atmosphere in the glove-box as well as about storage conditions.

Could you, please, show your Z-spectra ?

Vadim Sir, we used argon gas purity less than 0.5 ppm and Li metal is stored in vacuum dessicator.

Thank you sir for suggestion.

Below attached file is the Cole Cole plot of the cell configuration Li/CPE/Li

1) What is the VDC polarization value ?

2) The Z-values, in your Nyquist, plot are, at least, 4-orders higher than expected for a liquid Li-electrolyte. If your Li-electrolyte (CPE) is a solid one, then start using a liquid Li-electrolyte (Z-values near 1 Ohm) by fixing, firstly, the surface issues of (the corroded surface of) the Li electrode(s).

1) value of polarization voltage is 50mV for 1 hr

2) electrolte is Li conducting Solid electrolye

Artur sir I will try that too.

1) You can try to drop(-wet) a small drop of liquid[1] Li-electrolyte (-wetting) on each one of the Li electrode(s') side, e.g. Li//CPE and CPE//Li interfaces, and re-measure (both) Z-spectra.

2) Also, you can use a higher VDC polarization voltage[2] value, say a value of: 100 to 500mV for 1 hr.

1. It will reduce a lot the (serial) Z of the Li electrodes (interfaces), in order to focus better on your main target, the solid Li-electrolyte, it's Li-conductivity.

2. Record chronoamperometry.

Following