When it comes to batteries, there are a few key terms that everyone should know. Anode and cathode are two of those terms. Many people use these words interchangeably, but they actually have very different meanings. In this blog post, we’ll explain the difference between anodes and cathodes, and talk about what each one does in a battery. Stay tuned!
What is Anode?
An Anode is a negatively charged electrode used to attract and collect positively charged ions in an electrolytic cell. The anode is the site of oxidation in an electrolytic cell. When a current is applied, positively charged ions are attracted to the negative electrode or anode. These ions are then oxidized at the anode, producing electrons that flow through the external circuit back to the cathode. The Anode can be made from a variety of materials, including metals, alloys, and semiconductors. The choice of material depends on the electrolyte used and the desired reaction. In some cases, several Anodes may be used in series to achieve the desired reaction.
What is Cathode?
The cathode is an electrode through which electrons flow into a system. It is typically negative with respect to an anode. Cathodes are commonly used in electrical systems, such as batteries and cathode ray tubes. The term “cathode” can also refer to the metal electrode at the end of an electrical circuit, where current enters the circuit. In this case, the cathode is typically positive with respect to the Earth.
Cathodes are also used in electrochemical cells, such as corrosion cells and electrolysis cells. In these cells, the Cathode is usually the negative electrode. Cathodes are also used in photoelectrochemical cells, such as solar cells and photocathodes. In these cells, the Cathode is usually the positive electrode.
Difference between Anode and Cathode
- Anode and Cathode are terms used to designate the electrode by means of which electrical current enters or leaves an electrolytic cell. The anode is the electrode at which electrolysis takes place, that is, the electrode at which oxidation occurs; and the cathode is the electrode at which reduction occurs.
- Anodes are usually made of metal and cathodes of carbon. In many cells, the anode consists of a piece of the metal to be deposited, while the cathode is a rectangular plate of metal that serves to complete the circuit and also collect the deposit.
- Anode and cathode may also refer to electrodes in electrochemical cells other than electrolytic cells; for example, in a dry cell or lead storage battery the anode is the negative electrode and the cathode is the positive electrode.
- Anodes are also used in vacuum tubes and photocells. The word anode is derived from the Greek word anodes, meaning way up. The word cathode is derived from the Greek word cathodes, meaning way down.
Cathodes and anodes are two of the most important components in a battery. By understanding the difference between them, you can ensure your battery is working at its best.