I've made a LFP half-cell lithium-ion battery. Can I charge and discharge it with rate 1C?

How do I calculate the theoretical capacity of a cathode material (LiMn1.5Ni0.5O4) for lithium ion battery?

I have attached the charging curve from the battery tester for review. I need help on what is happening

I'm stating to assembly LFP | 1M LiPF6 in EC:DC electrolyte | Graphite pouch cells for practicing.

I started to charge the pouch at C/20 CCCV until 3.8V. The battery was able to charge, but know it can't perform discharge, as it reaches 0V in a second. Why is the battery not discharging?

I am working on development of solid polymer electrolytes (SPE) for Li-metal batteries. I have tested four SPEs with slightly varying compositions of polymer:Li-salt:plastisizer. The charge-discharge profiles of all the cells are attached for reference. The full cell test performed on them using LiFePO4 cathodes showed varying electrochemical activity at a voltage range of 2.5 V. Two of the samples were normal (Cell 1 and Cell 3), while other two had an additional tiny plateau around 2.5 V (Cell 2 and Cell 4). The only difference between them is that the latter two have 10% excess of plasticizer (Succinonitrile). Though I have seen few articles showing similar profile, there was no explanation given. It will be really helpful if anyone can help me understand the anomaly

The practical calculated capacity of my coin cell LiCoO2/graphite is 0.640mAh. The electrolyte used is 1M LiPF6 in 1:1 EC/DEC. Immediately after assembling the cell, I charge at a given current that rises to 5mA due to the standards of my machine (VOLTCRAFT ALC 8500 expert).

However, as you can see in the picture, at the end of the charging the cell is not able to maintain its charge at the charging cut-off voltage. The cell kind of shorts cicuits or breaks with a fast rise in current and voltage.

My thoughts are that I am doing fast charging and the SEI is not properly built. But nonethelesss even if I am doing fast initial first charge immediately after assembly, I should still be able to get a discharge curve even its just one cycle. Please what could the problem be with my cell and can I still get a onetime discharge curve even if the SEI is not/properly formed?

I will be very grateful for an answer, really need a solution to this for my research or a link guide. Thank you.

Hi all,

I'm studying on LFP/Graphite full cell battery.

Recently, I faced some big problems in this battery, especially in 0.1C first charge process.

Image file what I upload is that.

Everything has same as before, but now it happens.

I did many ways what I saw in other questions such as add two separators, or control crimping pressure like that.

I don't know why it happenes.

Does anyone have this problem? or know about this?

I am working on fabricating half-cells using LFP cathodes and MCMB anodes. I would like to know how the capacity of a half-cell can be predicted before performing the first charge-discharge cycle.

Specifically, if I measure the impedance of the half-cell prior to the first cycle, can the impedance data be used to estimate the capacity for the first cycle and subsequent cycles?

I would appreciate any insights, references, or experiences related to this. Thank you!

I need help with the formation of the cathode slurry for lithium-ion batteries using NMC material. When depositing it onto aluminum foil, it becomes brittle. I am using a ratio of 80:10:10 (NMC:PVDF:Carbon Super P) in NMP as the solvent.

Any suggestions on how to improve this?

I have attached an image of the unsuccessful result.

I appreciate your support.

Kind regards.