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  • Do Batteries Produce Hydrogen Gas

Do Batteries Produce Hydrogen Gas

On whether the battery produces hydrogen

On whether the battery produces hydrogen or not, it is really related to the safety and chemical treatment of many devices. There are many types of Guanfu batteries, and their chemical reactions are also different.

Common lead-acid batteries, when charged, the anode is oxygenated, and the cathode may have hydrogen escape. Cover the dissociation of sulfuric acid in the electrolyte, and water also participates in the electrical reaction. When the cathode potential reaches a certain value, water obtains electrons and hydrogenates. The formula is:\ (2H_ {2} O + 2e ^ {-} = H_ {2}\ uparrow + 2OH ^{-}\) 。 However, this process is not controlled, and the electrode materials and additives can affect the amount of hydrogen precipitation.

For nickel-metal hydride batteries, hydrogen storage alloys are used as the negative electrode. The hydrogen is mostly absorbed and stored by the alloy, and the escape is fresh. This is because its design is designed to efficiently store energy and control the escape of hydrogen, so under normal use, less hydrogen is generated.

As for lithium-ion batteries, the electrolyte in the system is not an aqueous phase, and it is mostly a mixture of organic solvent and lithium salt. The electricity should mainly involve the migration of lithium ions between the positive and negative electrodes, and there is no water for hydrogen evolution, so there is little hydrogen production under normal working conditions.

However, if the battery is damaged or used improperly, it will cause internal chaos, or there is a risk of abnormal gas production. If overcharged, the temperature rise, pressure increase in the battery, or the lead pair will produce hydrogen.

In summary, whether the battery produces hydrogen or not depends on its type, working conditions and operation conditions. Lead-acid batteries are prone to hydrogen production, while nickel-metal hydride and lithium batteries are normally produced less. Therefore, those who use batteries should follow the rules and observe their conditions to prevent hydrogen accumulation and danger.