Kovalenko V. Activation of nickel foam as a current collector of a supercapacitor by impact nickel plating: influence of treatment conditions = Активація пінонікелю, як струмовідводу суперконденсатору, методом ударного нікелювання: вплив умов обробки / V. Kovalenko, V. Kotok, V. Verbitskiy, V. Medianyk // Eastern-Europ. J. of Enterprise Technologies. - 2022. - № 5/12. - С. 47-54. - Бібліогр.: 54 назв. - англ.Nickel foam is widely used as a current lead/current collector and as the base of nickel hydroxide electrodes for hybrid supercapacitors. An investigation of the influence of activation conditions for a commercial sample of nickel foam produced by Linyi Gelon LIB Co Ltd (China) was carried out using the method of impact nickel plating. The morphology of activated and non-activated nickel foam samples was investigated by scanning electron microscopy. Activated and non-activated nickel foam samples were investigated by methods of cyclic voltammetry and galvanostatic charge-discharge cycling in the supercapacitor mode. It was shown that upon activation at i = 1 A/dm<^>2 and <$E tau> = 10 min, a thin layer of porous nickel with incomplete coverage was formed. Activation with impact nickel at i = 7 A/dm<^>2 and <$E tau> = 3 min revealed the formation of a nickel coating with a highly developed surface, on which local cracks were found as a result of the accumulation of internal stresses. Activation with impact nickel at i = 1 A/dm<^>2 and <$E tau> = 10 min led to the formation of a coating with a highly developed surface, with significant peeling of the coating. Cyclic voltammetry showed high efficiency of impact nickel activation at i = 7 A/dm<^>2, <$E tau> = 3 min, and i = 20 A/dm<^>2, <$E tau> = 5 min. The specific current of the cathode peak increased 6,06 - 6,44 times with respect to the non-activated sample. The investigation of the activated samplesє electrochemical characteristics by the galvanostatic cycling method showed that impact nickel activation at i = 1 A/dm<^>2 and <$E tau> = 10 min was insufficient. It was found that at a discharge up to E = 0 V, the maximum specific capacitance of 0,731 F/cm<^>2 was obtained for samples activated by impact nickel at i = 7 A/dm<^>2 and <$E tau> = 3 min. The increase in specific capacitance compared to the non-activated sample was 4,49 times. At full discharge, the highest electrochemical activity was found for nickel foam samples activated by impact nickel at i = 20 A/dm<^>2 and <$E tau> = 5 min. The specific capacitance was 0,505 mA-h/cm<^>2, and it increased 9,02 times. Індекс рубрикатора НБУВ: К232.206
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Шифр НБУВ: Ж24320 Пошук видання у каталогах НБУВ
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