Redoxkierroksia

Redoxkierroksia, also known as redox flow batteries, are a type of rechargeable battery that uses an electrolyte solution to store energy. Unlike traditional batteries that use solid electrodes, redox flow batteries use liquid electrolytes that contain dissolved ions. These ions can reversibly change their oxidation state, hence the term "redox."

The battery consists of two electrodes, a positive electrode and a negative electrode, separated by an ion-selective membrane. The electrolyte solutions are pumped between the electrodes during charging and discharging. During charging, the positive ions are oxidized at the negative electrode and reduced at the positive electrode, and vice versa during discharging.

Redox flow batteries offer several advantages, including long calendar life, high efficiency, and the ability to scale up energy storage capacity by simply increasing the size of the electrolyte tanks. They are well-suited for applications that require frequent charging and discharging, such as grid energy storage and renewable energy integration.

The most common redox flow battery technology uses vanadium ions in sulfuric acid as the electrolyte. Other chemistries, such as iron-chromium and zinc-bromine, are also being developed. Redox flow batteries are a promising technology for large-scale energy storage, but they still face challenges related to cost, efficiency, and safety.