What are the common power sources in life?

1. Dry battery: also called carbon-zinc battery. At first, carbon powder was used as the positive electrode, zinc cylinder was used as the negative electrode, and concentrated ammonium chloride aqueous solution was used as the electrolyte, and electrical energy was supplied by chemical reaction. In recent years, "alkaline batteries" have been widely used. Using potassium hydroxide or sodium hydroxide as electrolyte, the capacity is more than twice that of the same volume dry battery. It is often used in high-power appliances such as photographic flash lamps.

2. Battery: Lead-acid battery has played an important role in production and life. Colloidal battery is a kind of lead-acid battery in recent years. Adding gelling agent to sulfuric acid can make sulfuric acid electrolyte colloidal and prevent acid loss.

3. Silver oxide battery: It is a battery with small mass and large capacity. Widely used in electronic watches, satellites and so on. The common button silver oxide battery, the positive electrode is silver oxide and the negative electrode is zinc, also known as zinc-silver button battery.

4. Lithium-ion battery: The anode of lithium-ion battery adopts carbon electrode, which can adsorb lithium ions. When discharging, lithium becomes lithium ion, leaving the positive electrode of the battery to reach the negative electrode of the lithium ion battery, and the opposite is true when charging. Electrolyte is generally organic electrolyte, and lithium as an electrode greatly increases the capacity of the battery. Lithium batteries can be made into various shapes and are widely used in mobile phones, cameras and so on.

5. Photocell: A solar cell is a battery that converts light energy into electric energy. Silicon photovoltaic cell is a typical photovoltaic cell with stable performance and long service life. It has been widely used in calculators, radios, etc. Silicon photovoltaic cells are often used as the power supply of artificial satellites.

6. Fuel cell: Fuel cell is called the fourth power generation mode after thermal power, hydropower and nuclear power, and its application prospect is very broad. Fuel cell is an ideal clean energy source, which uses the chemical reaction of hydrogen and oxygen to generate electricity with high power generation efficiency. Because of these outstanding advantages, it is considered as one of the clean and efficient power generation technologies in 2 1 century.

7. Ni-MH battery: Ni-MH battery uses nickel hydroxide as the positive electrode, Ge-MH alloy as the negative electrode, and potassium hydroxide solution as the electrolyte. Ni-MH battery is favored by users because of its benefits and environmental protection, and its uses range from traditional small household appliances to our emerging mp3 products.

8. Nickel-cadmium battery: the anode is nickel oxide, the cathode is metal cadmium, and the electrolyte is mostly alkaline aqueous solution of potassium hydroxide and sodium hydroxide. It is an environmentally friendly, high-performance and pollution-free battery.

9. Atomic battery: it is a device that directly converts nuclear radiation energy into electric energy. Some atomic batteries use radiation to generate heat and convert it into electric energy; Others use rays to act on certain substances to emit light, and use silicon photovoltaic cells to generate electricity.