Емкостные свойства пленок гидроксида никеля как электродов для электрохимических конденсаторов на водном электролите

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Дәйексөз келтіру

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Аннотация

Структурные характеристики и элементный состав пленок гидроксида никеля, полученных электроосаждением из растворов 0.05М NiSO4 и 0.05М NiSO4 + 0.025М Li2SO4, изучены методами ИК-спектроскопии и просвечивающей электронной микроскопии. Методами циклической вольтамперометрии, гальваностатического заряда–разряда и импедансной спектроскопии определены электрохимические характеристики электродов в 1М водном растворе NaOH. Установлено, что удельная емкость наночастиц Ni(OH)2 зависит от состава электролита, используемого при электроосаждении. Показано, что осажденный из раствора сульфатов никеля и лития электрод обеспечивает максимальную удельную энергию 46.5 Вт ч/кг при плотности мощности 110 Вт/кг. Удельная энергия данного материала остается достаточно высокой 31.5 Вт ч/кг при мощности 2141 Вт/кг, а наибольшая емкость 3818 Ф/г получена при скорости развертки потенциала 5 мВ/с.

Авторлар туралы

Y. Dyshlovaya

Southern Federal University

Email: poyminova@sfedu.ru
B. Sadovaya St., 105/42, Rostov-on-Don, 344006 Russia

V. Chernjavina

Southern Federal University

B. Sadovaya St., 105/42, Rostov-on-Don, 344006 Russia

A. Berezhnaya

Southern Federal University

B. Sadovaya St., 105/42, Rostov-on-Don, 344006 Russia

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