source:other news
release time:2023-08-15
Hits:0
Popular:
During the discharge process of the battery, it belongs to the primary battery reaction. This type of electrode reaction involves electrolyte solution. If it can be analyzed whether the electrolyte solution is involved in the electrode reaction, the writing of the negative electrode reaction formula and the positive electrode reaction formula can be easily solved.
Taking lead-acid batteries as an example, we will analyze the writing method of electrode reaction equations.
The total reaction of lead-acid batteries is: Pb+PbO2+2H2SO4=2PbSO4+2H2O
According to the analysis of the working principle of the primary battery, the negative electrode loses electrons and undergoes an oxidation reaction. It can be seen that: Pb 2e -=Pb2+①, the generated Pb2+enters the electrolyte solution, and Pb2+cannot coexist with SO42- in the solution. The reaction must continue to generate PbSO4, that is, Pb2++SO42-=PbSO4 ②. Therefore, the negative electrode reaction formula of the primary battery is ①+②, that is, Pb 2e -+SO42-=PbSO4; The positive electrode is the electrode where electrons undergo a reduction reaction, with PbO2+2e -=Pb2++2O2- ①. Pb2+and O2- enter the solution. As the electrolyte solution is an H2SO4 solution, O2- cannot exist alone in an acidic environment. The particles that can be combined with O2- are H+and H2O. O2- preferentially combines with H+to generate H2O in an acidic environment, resulting in a reaction at the positive electrode: 4H++2O2-=2H2O ②; Pb2++SO42-=PbSO4 ③ According to the above analysis, the positive electrode reaction formula is ①+②+③, that is, PbO2+2e -+SO42-+4H+=PbSO4+2H2O. (Note: Charge conservation and mass conservation should be followed in the electrode reaction equation; when adding the negative and positive reaction equations to obtain the total reaction, it should be noted that the number of electrons gained and lost should be equal.)
For example, Ag Zn high-energy batteries (button batteries) are composed of Ag2O, Zn, and KOH solutions. The total reaction is: Zn+Ag2O+H2O=Zn (OH) 2+2Ag
Read recommendations:
lifepo4 solar battery Processor
solar powered electric generator
+85 High Temperature Lithium Ion Battery 18650 26650 Cylindrical Cell
Why should we focus on developing lithium iron phosphate batteries?
Last article:Lithium primary battery.12 volt deep cycle batteries
Next article:What are the requirements for lithium batteries used in intelligent robots shared by lithium battery manufacturers?best solar powered generator
related suggestion
lithium ion golf cart batteries direct sales
2023-03-22solar battery storage system Processing
2023-04-07deep cycle marine battery Processor
2023-03-20lithium battery 12v 100ah
2023-03-20home solar battery system wholesaler
2023-03-20lithium ion golf cart batteries Manufacturing
2023-03-20solar energy storage batteries
2023-05-08solar generator for house
2023-05-08solar powered battery pack
2023-05-08solar power station
2023-05-08whole house solar generator
2023-05-08solar generator kits
2023-05-0860V 80Ah Motive Battery Pack for AGV Robot
2023-02-14LiFePo4 Battery Pack 12V 200Ah for Ship Boat
2023-02-1418650 21700 26650 10C 15C 20C Lithium Ion Battery Cell
2023-02-1418650 Na-ion Sodium-ion Battery 3.1V 1300mAh 1500mAh 3000 Cycles
2023-08-02Lithium Replacing Lead-Acid LiFePo4 Battery Pack 12V 200Ah
2022-09-19Balanced principle of battery pack
2023-02-15Li4ti5012 lithium battery.36 volt golf cart batteries
2023-07-17Important factors affecting internal resistance of battery
2022-11-11How to choose FPV batteries?
2023-02-22How to preserve 48V lithium iron phosphate battery?
2022-11-22Flexible lithium battery
2022-12-28Lithium power battery characteristics advantages.solar generator for home
2023-07-11Which of the lead -acid batteries and lithium batteries is better?solar battery storage system wholesale
2023-04-11Navigation model battery introduction.lithium marine batteries maker
2023-03-31The difference between "blade battery" and ternary lithium battery
2022-12-02