Aromatic polyimides composed of 4,4’-hexafluoroisopropylidine diphthalic anhydride (6FDA), 2,4,6-trimethyl-1,3-phenylenediamine (DAM), and 3,5-diaminobenzoic acid (DABA) 6FDA-DAM:DABA, 6FDA-DAM, and 6FDA-DABA were investigated as carbon precursors for supercapacitors. 6FDA based polyimides get much attraction as high performance polymers, due to their high thermal stability and high free volume. Polymers were synthesized in appropriate mole ratios of starting materials. Synthesized polymers were characterized, electrospun and subjected to thermal treatment which enhance the stability of the polymer chains by crosslinking. The effect of carboxylic moiety in DABA was further scrutinized, as the ability of acting as an internal porogen to create pores upon thermal treatment including carbonization at 1000°C. As a comparison 6FDA-DAM (without a carboxylic moiety) will be tested. After the carbonization these fiber mats will be activated by CO2 to further improve the surface area. Finally the treated fibers will be characterized and tested for the electrochemical performance.

Aromatic polyimides containing diaminobenzoic acid as in-situ porogen for electrochemical supercapacitors

254th National Meeting (2017)

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