PVDF is a highly non reactive and pure thermoplastic fluoropolymer. PVDF is light and flexible; it is used generally for reserved application requiring the highest purity, strength, and resistance to solvents, acids, bases. The high electrical resistance, and the good flame resistance, make PVDF a good material for electrical insulation of cables that get hot during use such as on airplanes. It is available as piping products, sheets, and plates. It can be injection molded and welded and is commonly used in the chemical semiconductor and medical industries. The low acoustic impedance of this polymer makes it attractive to medical applications of ultrasonic imaging . Sure It is possible to use it as a binder .

KINDS

Dear Farah,

Thank you for your answer. Of course it is possible to use it as binder but i wonder is it possible to use it in alkaline environment (i mean 30 wt% KOH solution)

In alkaline environment the PVDF is aging, slowly, due to surface[1] side reactions (de-hydroflurination). However, the surface aging time depends strongly on it's (crystalline) structure form[2] and the alkaline batteries' electrodes post preparation treatment[3] of your active materials with the PVDF binder.

1. Filtration and cleaning performances of PVDF membranes aged with exposure to sodium hypochlorite https://www.sciencedirect.com/science/article/pii/S1383586617327041

2. Medical electrical lead with biostable PVDF-based materials https://patents.justia.com/patent/9855415

3. Impacts of sodium hydroxide and sodium hypochlorite aging on polyvinylidene fluoride membranes fabricated with different methods https://www.sciencedirect.com/science/article/pii/S1001074217308367

Farah's answer is quite complete. Yes you can use PVDF as a binder for NIMH batteries. Usually it is used from NMP solution in the case of lithium batteries. However aqueous dispersions might also work in the case of the NIMH battery electrodes. Some post heating and pressure might be necessary in this latter case.