What is the difference between lithium iron batteries and alkaline batteries and carbon batteries?

Date:2021-09-17
Summary:

1. Carbon battery Carbon battery, the scientific name i […]

1. Carbon battery
Carbon battery, the scientific name is zinc-manganese dry battery (zinc-manganese dry battery), the simplest method of identification: the model on the battery skin is R6+ suffix (No. 5)/R03+ suffix (No. 7), that's it For batteries, the suffix S means normal, P means high power, C means high capacity and so on. Carbon batteries have very low discharge power and poor discharge capacity, so they are only suitable for low-power consumption appliances, such as clocks, remote controls, etc. In addition, the negative electrode of a carbon battery is the battery casing. After the discharge is completed, electrolyte leakage often occurs due to the casing rupture, which damages electrical equipment.
2. Alkaline battery
Alkaline batteries are also known as alkaline dry batteries, alkaline zinc-manganese batteries, and alkaline manganese batteries. They are the best-performing varieties in the current commercial zinc-manganese dry battery series. The model of alkaline batteries is LR6 (size five)/LR03 (size seven), and the prefix L stands for alkaline (a"L"kaline). Of course, there may be a suffix after the number, but it is not common. Alkaline batteries use electrolytic manganese dioxide to make a ring-shaped positive electrode, and a zinc paste configured with zinc powder and additives is used as the negative electrode. Due to the strong conductivity of the electrolyte, the surface area of ​​the positive and negative materials is much better than that of carbon batteries, and the promotion of the electrochemical reaction of the zinc-manganese system under strong alkaline conditions makes the output power and capacity of alkaline batteries far better than Carbon battery.
3. Lithium iron battery
Lithium iron dry battery, the full name is lithium-iron disulfide dry battery. Because this kind of battery uses brand-new internal materials and has a variety of characteristics, it is often referred to as the third-generation dry battery in the industry. Compared with the alkaline batteries that existed in 1949, the emergence of lithium iron batteries is indeed very novel. The reversibility of the reaction of the positive iron disulfide in the discharge is relatively narrow, so this special battery is not suitable for the development of a rechargeable battery, and the use of lithium metal that is not conducive to charging but higher capacity as the negative electrode can improve the usability capacity. This makes this battery very suitable for disposable battery applications and is the best alternative to carbon batteries and alkaline batteries. Due to the violent reaction between lithium and water, the electrolyte of lithium iron batteries uses organic solvents containing lithium salts instead of aqueous solutions. Compared with carbon batteries and alkaline batteries, this new type of lithium iron batteries The material eliminates the risk of leakage. The weight of a lithium-iron disulfide battery of the same size is only half of that of an alkaline battery, and the total discharge energy is more than 25% higher than that of an alkaline battery. It has an obvious discharge voltage platform (approximately 1.45V), so the discharge voltage of lithium iron batteries is more stable than that of alkaline batteries. The discharge power is significantly higher than that of alkaline batteries. It is especially suitable for use in heavy load situations, such as flashlights, electric tools, electric toothbrushes, adult toys, and children's toys. At the same time, compared with alkaline batteries, its leakage rate and self-discharge are lower, so low-power appliances also have certain advantages, but the biggest factor restricting its popularity is the high production cost and the high battery unit price. More than 100% of the alkaline battery.
In addition to the essential difference in internal materials from carbon and alkaline batteries, lithium-iron batteries are also completely different in production technology. The interior of time-resistant lithium-iron batteries is also a wound structure.