What are the common power sources in life?

1. Dry cell batteries: also known as carbon and zinc batteries. The earliest carbon powder as the positive pole, zinc tube as the negative pole, concentrated aqueous solution of ammonium chloride as the electrolyte, the chemical reaction to supply electricity. In recent years, the use of more "alkaline batteries", with potassium hydroxide or sodium hydroxide as electrolyte, capacity than the same volume of dry batteries more than double. They are often used in photographic flash lamps and other appliances that consume a lot of electricity.

2. Storage batteries: lead-acid batteries play an important role in production and life. In recent years, the colloidal battery belongs to a kind of lead-acid battery, in the sulfuric acid added gelling agent, so that the sulfuric acid electrolyte into a gel state, can prevent the loss of acid.

3. Silver oxide battery: a small mass, large capacity battery. A large number of used in electronic watches, artificial satellites and so on. Common button type silver oxide battery, the positive pole is silver oxide, the negative pole is zinc, also known as zinc-silver button battery.

4. Lithium-ion batteries: lithium-ion battery anode can absorb lithium ions of carbon poles, discharge lithium into lithium ions, out of the battery anode, to reach the cathode of the lithium-ion battery, charging just the opposite. Electrolyte is generally organic electrolyte, lithium electrode greatly increase the capacity of the battery. Lithium batteries can be made into a variety of shapes, widely used in mobile phones, cameras and so on.

5. Photovoltaic cells: solar cells are a kind of battery that converts light energy into electricity. Silicon photovoltaic cell is a typical photovoltaic cell, stable performance, long service life. Has been widely used in calculators, radios, etc., in the artificial satellite commonly used silicon photovoltaic cells as a power source.

6. Fuel Cell: Fuel cell is known as the fourth type of power generation after thermal power, hydropower, nuclear power, the application of a very broad prospect. Fuel cells utilize the technology of generating electricity by chemical reaction between hydrogen and oxygen, which has high power generation efficiency and is an ideal clean energy source. Because of these outstanding superiority, it is considered as one of the clean and efficient power generation technologies in the 21st century.

7. Nickel-metal hydride batteries: Nickel-metal hydride batteries use nickel hydroxide as the positive electrode, germanium-hydrogen alloy as the negative electrode, and potassium hydroxide solution as the electrolyte. Nickel-metal hydride batteries are favored by users for their affordable and environmentally friendly advantages, and their use has evolved from traditional small home appliances to our emerging products such as mp3.

8. Nickel-cadmium batteries: positive pole of nickel oxide, negative pole for the metal cadmium, electrolyte for potassium hydroxide, sodium hydroxide alkaline aqueous solution. It is a green, high-performance, non-polluting battery.

9. Atomic batteries: it is the atomic nucleus radioactive energy directly into electrical devices. Some atomic batteries are the use of radiation to generate heat will be converted into electrical energy; there is also the use of rays acting on certain substances luminescence, with silicon photovoltaic cells to generate electricity.