Many people may be familiar with lithium batteries from mobile phones. It is used in many home appliances. Undoubtedly, the advantages of high efficiency and lightweight lithium batteries are making them rapidly popularized and applied. However, did you know that using it carelessly will also make you “fire”?
Lithium batteries are lightweight, high efficiency, and have low-temperature resistance (-40°C). Lithium batteries with a thickness of 0.3mm and the size of a postage stamp can be used continuously for more than 5 years. The current alkaline dry batteries and manganese batteries have been phased out in recent years. Widely used in many high-end home appliances and mobile phones.
Lithium batteries use organic solvents, unlike the zinc chloride and potassium hydroxide aqueous electrolytes of the current manganese batteries and alkaline dry batteries. The positive electrode of a lithium battery is made of manganese dioxide, lead fluoride, sulfurous chloride and other materials. Compared with zinc chloride used in available battery negative electrodes, the lithium metal foil used in the negative electrode has a strong ionization tendency and a significant voltage difference between the positive and negative electrodes, which improves the working efficiency of the lithium battery.
However, lithium batteries often experience heat and combustion during use. The lighter ones will affect the use of the host, and the heavy ones will burn the host and cause a fire. According to reports, many domestic fire accidents have been caused by the heating and burning of lithium batteries in Japan in recent years.
So why do lithium batteries get hot and burn? After many materials in the original lithium battery come into contact with water, a violent chemical reaction can occur. A large amount of heat energy is released, resulting in heat generation and combustion. The manganese dioxide of the positive electrode of the lithium battery can generate heat with only a tiny drop of water. After the sulphurous chloride in the lithium battery contacts water, it releases heat energy while generating hydrochloric acid and sulfur dioxide. Several factors make the lithium battery a “tinder” in life, so people must pay attention to waterproofing and prevent dampness. After the various hosts are out of use, the lithium battery should be removed and stored in a dry and low-temperature place to prevent and avoid home fire accidents caused by the improper use of lithium batteries.
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