All chemical energy is converted into electrical energy. The ternary lithium ion battery is a dry battery commonly used in daily life. Cathode material: MnO2, graphite rod anode material: zinc sheet electrolyte: NH4Cl, ZnCl2 and starch paste battery symbol can be expressed as (-) Zn | ZnCl2, NH4Cl (mastic) ‖ MnO2 | C (graphite) (+) negative electrode : Zn=Zn2++2e Positive electrode: 2MnO2+2NH4++2e=Mn2O3+2NH3+H2O Total reaction: Zn+2MnO2+2NH4+=2Zn2++Mn2O3+2NH3+H2O chemical reaction, electricity generation.
There are many kinds of batteries. For example: lead battery silver zinc battery ternary lithium ion battery. The lead storage battery is taken as an example to illustrate the writing of the chemical reaction equation for charging and discharging. The lithium manganese oxide lithium ion battery has Pb and PbO2, and the electrolyte solution is H2SO4. The total battery reaction is: Pb+PbO2+2H2SO4=2PbSO4+2H2O chemical reaction, charging and discharging.
A ternary lithium-ion battery is a device that converts chemical energy directly into electrical energy. It is a rechargeable battery that is recharged by a reversible chemical reaction, usually referred to as a lead-acid battery. Its working principle: the external active energy is used to regenerate the internal active material during charging, and the electrical energy is stored as chemical energy, and the chemical energy is converted into the electrical energy output again when discharging.
A dry battery is a chemical battery that uses a paste electrolyte to generate direct current. It is a commonly used and light battery in daily life.
The dry battery cannot be reused and is disposable; the battery can be recharged and reused.
A dry battery is a primary battery in a chemical power source and is a disposable battery. Since this chemical power supply device has an electrolyte that is a non-flowable paste, it is called a dry battery, which is said to be relative to a battery having a flowable electrolyte. Dry batteries are not only suitable for flashlights, semiconductor radios, tape recorders, cameras, electronic clocks, toys, etc., but also for various fields in the national economy such as national defense, scientific research, telecommunications, navigation, aviation, and medicine.
With the development of science and technology, lithium iron phosphate lithium ion batteries have developed into a large family, so far there have been more than 100 kinds. Common zinc-manganese dry batteries, alkaline zinc-manganese dry batteries, magnesium-manganese dry batteries, zinc-air batteries, zinc-mercury oxide batteries, zinc-silver oxide batteries, lithium-manganese batteries, and the like.
For the most used zinc-manganese dry batteries, they can be divided according to different structures: paste zinc-manganese dry electricity, cardboard zinc-manganese dry batteries, thin film zinc-manganese dry batteries, zinc zinc-zinc-manganese dry batteries, Alkaline zinc-manganese dry battery, four-pole parallel zinc-manganese dry battery, laminated zinc-manganese dry battery, and the like.
3. Structure and principle of zinc-manganese dry battery
Zinc-manganese dry batteries are commonly used in daily life.
Cathode material: MnO2, graphite rod
Anode material: zinc sheet
Electrolyte: NH4Cl, ZnCl2 and starch paste
The battery symbol can be expressed as
(-)Zn|ZnCl2, NH4Cl (mastic) ‖MnO2|C(graphite)(+)
Negative electrode: Zn=Zn2++2e
Positive electrode: 2MnO2+2NH4++2e=Mn2O3+2NH3+H2O
Total reaction: Zn+2MnO2+2NH4+=2Zn2++Mn2O3+2NH3+H2O
The lithium iron phosphate lithium ion battery has an electromotive force of 1.5V. The generated NH3 gas is adsorbed by graphite, causing the electromotive force to drop rapidly. If high conductivity paste KOH is used instead of NH4Cl, the lithium manganate lithium ion battery cathode material is changed to steel cylinder, and the MnO2 layer is close to the steel cylinder to form an alkaline zinc manganese dry battery. Since the battery reaction has no gas, the internal resistance is low. The electromotive force is 1.5V, which is relatively stable.
The dry battery belongs to the primary battery in the chemical power source, and is a disposable battery. The manganese dioxide is used as the positive electrode and the zinc can is used as the negative electrode to convert the chemical energy into electric energy to supply the external circuit. In the chemical reaction, since zinc is more active than manganese, zinc loses electrons to be oxidized, and manganese gets electrons to be reduced.
A battery is one of the batteries. Its working principle is to convert chemical energy into electrical energy.
It uses a lead plate filled with sponge lead as a negative electrode, a lead plate filled with lead dioxide as a positive electrode, and 22 to 28% of dilute sulfuric acid as an electrolyte. At the time of charging, the lithium manganate lithium ion battery is converted into chemical energy, and the chemical energy is converted into electric energy when discharged. When the battery is discharged, the metal lead is a negative electrode, which undergoes an oxidation reaction and is oxidized to lead sulfate; the lead dioxide is a positive electrode, and a reduction reaction occurs, and is reduced to lead sulfate. When the battery is charged by direct current, the two poles respectively produce lead and lead dioxide. After removing the power supply, it returns to the state before discharge to form a chemical battery. A lead storage battery is a battery that can be repeatedly charged and discharged, and is called a secondary battery. Its voltage is 2V, usually three series of lead batteries are used in series, the voltage is 6V. The car uses six lead batteries in series to form a 12V battery pack. The lead storage battery should be supplemented with sulfuric acid after a period of use to keep the electrolyte containing 22 to 28% of dilute sulfuric acid.
Lithium iron phosphate lithium ion battery is widely used in UPS, electric vehicles, scooters, wind energy solar systems, safety alarms, etc.
Battery: The positive plate is a lead dioxide plate, and the negative plate is a lead plate. The inter-insertion structure is a layer of a positive plate with a negative plate arranged with a gap between the plates, and dilute sulfuric acid is used as an electrolyte. All the positive plates are connected to the positive electrode, and all the negative plates are connected to make the negative electrode. In addition, the general storage battery is 6V and 12V. Generally, the voltage of a lead-acid battery unit is 2V, so the 6V and 12V are actually 3 And the series connection of 6 battery cells.
Lithium battery: The positive electrode plate is spheroidal carbon, and the negative electrode is lithium ion compound. Currently, there are two kinds of lithium cobalt oxide and lithium iron phosphate. There are two kinds of structures, one is wound type, and the other is laminated type. It is a winding type, which is a layer of positive electrode sheet with a negative electrode sheet with an insulating permeable membrane in the middle, which is then rolled up and placed in a package or bag; the laminated type is a layer of positive electrode and a separator of the same shape. A layer of negative electrode and a separator are stacked in the package. The voltage of the lithium battery is generally 3.6V and 3.7V.
Dry battery: The outer shell is a zinc shell as the negative electrode. The inner surface of the zinc shell has a layer of ion-permeable paper, and then filled with a mixed paste of manganese dioxide, ammonium chloride and starch. The graphite conductive rod is inserted in the middle, and then the top is packed with asphalt. The conductive rod top buckle metal cap leads out the positive pole. The dry battery voltage is generally 1.5V.
A dry battery is a voltaic battery that uses an absorbent (such as wood chips or gelatin) to make the contents a paste that does not spill. Often used as a power source for flashlight lighting, radios, etc. After years of development, China's dry battery technology has made breakthroughs in energy, cycle life, high and low temperature adaptability.
Zhiyan Data Research Center shows that China is gradually narrowing the gap with international leading technology, and has reached international level in some core technologies, and is increasingly entering the international market.
Drycell (Drycell) is a chemical battery that uses a paste electrolyte to generate direct current (a wet battery is a chemical battery using a liquid electrolyte). It is roughly divided into a primary battery and a secondary battery. For general use, as well as a lightweight battery. it
a battery that can be made in the lab
a battery that can be made in the lab
They can be used on many electrical appliances.
A common dry battery is a zinc-manganese battery (or a carbon-zinc battery, ie dryLeclanchécell).