In our modern lives, we use many things which we are not that familiar with but just know their uses. One such term we come across is an “electrochemical cell”. We know that things we use can have them but what exactly it means is understood by a few of us in actuality. Well, to define it in simple terms, it is basically a device that produces electrical energy using the reaction happening inside as a source. Or in any cell, this provides the electrical energy for a chemical reaction. Further, these cells are used in different setups in either a combination in series or in parallel or in both types to form a battery, which we use in different devices that we use in our day today life. An electrochemical cell uses two electrodes for its functioning. These are names as cathode, which is positively charged and another is called anode that carries negative charges. Electrons travel from one electrode from another and the energy is generated this way in them.
Generally, it is a two-electrode setup that gets used, but in some cases for an altogether different purpose, there exist three or multiple electrode setups. These constitutions include some other types of electrodes besides cathode and anode. These other electrodes that are used are:
1. Counter electrode
This is also known as an auxiliary electrode, which offers an input potential to the functional electrode. They are used to complete the circuit to have the current flowing unhesitant.
2. Reference electrode
This is an electrode that provides a defined and stable potential. This potential is decided by the electrolyte in electrode, and a reference element is also used along.
So, you have them in your use through AA batteries setup in your remotes and your iPhones.
A reference electrode is used depending upon the nature of purpose and one uses different types of them to meet the requirement. They are available in different types and mostly used are the glass electrode, calomel electrode, and an Ag Agcl reference electrode. Among these many, the silver silver chloride reference electrode is used widely. They are so much in demand for its stability, reliability, non-toxicity and inexpensiveness. The electrochemical cells make use of electrodes in different combination to satisfy a particular type of need. They are needed to carry out electrolysis for commercial electroplating. They are used in various devices like remotes, torches, etc. Also, they are needed for a successful metal production by purifying the impure metals. You might not know that a fuel cell too make use of the electrochemical cell as a constant source of energy.
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