Which is better, polymer lithium batteries or lithium batteries?

A lithium polymer battery refers to a lithium ion battery that is all solid or gel is too electrolyte. Generally, an aluminum-plastic composite film is used as a packaging material. There are currently only two real lithium polymer batteries in the world. One is Japan's SONY, and the other is China's ATL.

A lithium battery generally refers to an aluminum shell battery, the electrolyte is in a liquid state, and the outer packaging material is an aluminum shell.

Lithium polymer batteries are safer than lithium batteries. Lithium polymer batteries are upgraded products of lithium ion batteries. Compared with the current popular lithium-ion battery, it has the advantages of large capacity, small size (thin), and safety (no explosion). However, due to the time required for the replacement of the entire industry chain, its cost (cost) is still relatively high, and it is only used in high-end digital products (ultra-thin notebook computers, etc.).

Predictably, in the next 5-10 years, lithium polymer battery will replace the existing lithium-ion batteries. In fact, in the electronics industry more developed countries such as Japan and South Korea the popularity rate of lithium polymer battery has reached a certain level, only in this respect is relatively backward in our country, let us wait and see!, etc in the near future with lithium polymer battery cell phone cheaper, I have to change a new cell phone this safer (battery)!

Lithium polymer battery (Li - polymer, also known as the polymer lithium battery) : with high energy density, miniaturization, ultra-thin, lightweight, and high safety and low cost, and other obvious advantages, is a new type of battery. In shape, lithium polymer battery with ultra-thin characteristics, can match the needs of the various products, made into any shape and the capacity of the battery. The battery can reach the minimum thickness of 0.5 mm. Relative to the lithium ion battery, lithium polymer battery characteristics are as follows:

1. No battery leakage problems, its inside the battery does not contain liquid electrolyte, the use of colloidal solids.

2. Can be made into thin battery: 3.6 V400mAh capacity its thickness can be thin to 0.5 mm.

3. The battery can be designed into various shapes.

4. The battery can be bending deformation: polymer battery maximum bending around 90 °.

5. Can be made into a single high voltage: liquid electrolyte battery only with the number of cells in series with high voltage, and the polymer batteries as there is no liquid itself, can be made within the single star multilayer combination to achieve high voltage.

6. Capacity will is more than double that of the same size of lithium ion batteries.

Lithium ion battery and lithium polymer battery, they both have their respective advantages and disadvantages.

Polymer lithium battery with the advantages and disadvantages of lithium ion battery can't think.

First, advantages:

1. Good safety performance

Lithium-ion polymer battery with aluminum composite flexible packaging in the structure, different from liquid metal case of batteries, in the event of a safety hazard, liquid batteries easy explosion, gas drum and polymer batteries will only at most.

2. The thickness is small, can do more thin

Ultra-thin, batteries could assemble into a credit card. Ordinary liquid lithium electricity use custom shell, after the plug is the method of the cathode, thickness of 3.6 mm the following technical bottlenecks, polymer batteries, there is no this problem, the thickness can be below 1 mm, can meet the demand of current mobile direction.

3. Light weight

A battery using a polymer electrolyte does not require a metal shell as a protective outer package. The weight of the polymer battery is 40% lighter than the steel shell lithium battery of the same capacity specification, which is 20% lighter than the aluminum shell battery.

4. Large capacity

Polymer battery is the same size of the steel shell battery capacity, 10 to 15% more than high aluminum battery 5 ~ 10%, be the first choice of the color screen mobile phones and MMS, now on the market a new color and MMS phones are mostly used polymer batteries.

5. Small resistance

The internal resistance of the polymer batteries is less than liquid batteries, the current domestic internal resistance of the polymer batteries can even do below 35 m Ω, greatly reduced the battery power consumption, extend the standby time of mobile phone, can reach with international level. This polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and is the most promising alternative to nickel-metal hydride batteries.

6. The shape can be customized

Manufacturers are not limited to standard shapes and can be economically made to the right size. Polymer batteries can increase or decrease the thickness of batteries according to customers' needs. Develop new battery models, which are cheap, open cycle is short, and some can even be customized according to the shape of mobile phones to make full use of battery casing space and upgrade battery capacity.

7. Discharge characteristics

Polymer battery using gel electrolyte, compared to liquid electrolyte, colloid electrolyte with smooth discharge characteristics and higher discharge platform.

8. Simple protection board design

Because of using polymer materials, batteries, no fire, no explosion, batteries itself has enough safety, therefore, polymer battery protection circuit design can consider omitting PTC and fuse, thereby saving the cost of battery.

Second, the disadvantages:

1, compared with lithium ion battery energy density, and cycles are falling.

2, the manufacture is expensive.

3, there is no standard shape, most battery manufacturing for high volume consumer market.

4. Compared with lithium-ion battery, the price and energy are relatively high.

Lithium-ion batteries are classified into liquid lithium-ion batteries (Liquified Lithium-Ion Battery, LIB for short) and polymer lithium-ion batteries (Polymer Lithium-Ion Battery, PLB for short) or plastic lithium-ion batteries (Plastic Lithium IonBatteries, referred to as PLB). The positive and negative materials used in the polymer lithium ion battery are the same as the liquid lithium ions. The positive electrode material is divided into lithium cobaltate, lithium manganate, ternary material and lithium iron phosphate material, and the negative electrode is graphite. The working principle of the battery is also basically Consistent. The main difference is that the electrolyte is different. The liquid lithium ion battery uses a liquid electrolyte, and the polymer lithium ion battery is replaced by a solid polymer electrolyte. The polymer can be either "dry" or "colloidal". Most of the current polymer gel electrolytes are used.

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