1. Lithium-ion batteries and lithium polymer batteries can be distinguished by their packaging labeling. Lithium-ion batteries are usually labeled with "Li-ion," while lithium polymer batteries are usually labeled with "Li-Polymer," as shown in the image below. Also, because the electrolyte in lithium polymer batteries is gel-like, there is less issue with electrolyte leakage, so they are mostly packaged in aluminum-plastic flexible packaging.
2. Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the negative electrode material and a non-aqueous electrolyte solution. They were invented by Thomas Edison. The reaction equation used in the battery is: Li + MnO₂ = LiMnO₂. This reaction is a redox reaction, and discharge occurs during this process. Previously, because lithium metal is chemically very reactive, and its processing, storage, and use required very strict environmental controls, lithium-ion batteries were not widely used for a long time.
Lithium batteries are generally divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was developed in 1996, and their safety, specific capacity, self-discharge rate, and performance-price ratio are all superior to lithium-ion batteries.
3. Lithium polymer batteries (Li-polymer, also known as high-molecular lithium batteries): Compared to previous batteries, these are high-energy, miniaturized, and lightweight, and are a type of chemical battery. In terms of shape, lithium polymer batteries are ultra-thin, allowing them to be manufactured in different shapes and capacities to meet the needs of various products. Theoretically, the minimum thickness of this type of battery can reach 0.5mm.
Lithium-ion batteries and lithium polymer batteries can be distinguished by their packaging labeling. Lithium-ion batteries are usually labeled "Li-ion," while lithium polymer batteries are usually labeled "Li-Polymer," as shown in the image below. Furthermore, because the electrolyte in lithium polymer batteries is gel-like, there is less issue with electrolyte leakage, so they are mostly packaged in aluminum-plastic flexible packaging.
Polymer lithium batteries have the same chemical properties and even the same internal structure as liquid lithium-ion batteries. They are a new type of battery developed based on liquid lithium-ion batteries. Compared to liquid lithium-ion batteries, polymer lithium-ion batteries have the following advantages:
Good safety performance, will not explode
It can be made into various shapes
Lighter than steel-cased and aluminum-cased lithium batteries of the same specifications
The capacity is generally higher than that of steel-cased lithium batteries and aluminum-cased lithium batteries of the same specifications.
Low internal resistance allows the battery capacity to be fully utilized.
It has good high-temperature performance and will not bulge after being heated to 85℃ for 4 hours.
The cycle performance, battery capacity, and internal resistance are all consistent.
Brilliant Encyclopedia | Digital Enthusiasts | Published on 2017-07-19 | Comments (2) 184
Lithium-ion batteries with polymer cathode materials.
It uses a conductive polymer as the positive electrode material, and its specific energy is three times that of existing lithium-ion batteries, making it the latest generation of lithium-ion batteries.
Because a solid electrolyte is used instead of a liquid electrolyte, polymer lithium-ion batteries have advantages over liquid lithium-ion batteries, such as being thinner, having an arbitrary area, and being able to be made into any shape. They also do not have safety issues such as leakage, combustion, or explosion. Therefore, aluminum-plastic composite films can be used to manufacture the battery casing, thereby increasing the specific capacity of the entire battery. Polymer lithium-ion batteries can also use polymers as positive electrode materials, and their specific energy will be more than 50% higher than that of current liquid lithium-ion batteries.
Furthermore, polymer lithium-ion batteries offer improvements over traditional lithium-ion batteries in terms of operating voltage and charge-discharge cycle life. Based on these advantages, polymer lithium-ion batteries are hailed as the next generation of lithium-ion batteries. (The last sentence is a repetition of the previous one and can be omitted.)
Lithium polymer batteries (Li-polymer, also known as polymer lithium batteries): These are a type of lithium-ion battery, but compared to liquid lithium batteries (Li-ion), they offer significant advantages such as higher energy density, smaller size, ultra-thin design, lighter weight, and higher safety, making them a newer type of battery. In terms of shape, lithium polymer batteries are ultra-thin, allowing them to be manufactured in any shape and capacity to meet the needs of various products. The minimum thickness achievable for this type of battery is 0.5mm. Its nominal voltage is the same as Li-ion batteries, 3.7V, and it has no memory effect.
