An Overview of The Open-Circuit Voltage Thermodynamics on Vanadium Redox Flow Battery and Zn-Air Redox Flow Battery
DOI:
https://doi.org/10.55893/jt.vol25no1.795Kata Kunci:
Baterai Aliran Redoks, Tegangan Sirkuit Terbuka, Termodinamika, Baterai Aliran Redoks Vanadium, Baterai Zn-UdaraAbstrak
Persamaan Nernst untuk tegangan sirkuit terbuka, yang pertama kali dikembangkan oleh Walther Nernst lebih dari seabad yang lalu, sangat penting dalam studi sistem elektrokimia. Sayangnya, ketika diterapkan pada sistem yang kompleks (seperti yang menggunakan membran pertukaran ion atau melibatkan potensial campuran), persamaan ini dapat mengambil bentuk yang salah karena asumsi yang mendasari derivasi persamaan tersebut sering diabaikan dalam literatur. Terlepas dari cara proses elektrokimia diekspresikan, kesalahan-kesalahan ini dapat dicegah dengan menggunakan derivasi termodinamika yang akurat. Misalnya, pemodelan baterai aliran redoks vanadium dan baterai zinc-air memerlukan derivasi yang benar dari persamaan Nernst. Termodinamika non-kesetimbangan adalah titik awal yang ketat untuk derivasi persamaan Nernst.
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