polymer lithium ion battery

According to the lithium battery electrolyte material for lithium ion batteries of different, can be divided into liquid lithium ion battery, referred to as LIB ) and polymer lithium ion battery ( polymer lithium ion battery, referred to as LIP ) two kinds big. Polymer lithium ion battery with anode material and liquid lithium ion are the same, the anode material can be divided into lithium cobalt oxide, lithium manganese oxide, three yuan materials and lithium iron phosphate as cathode material, graphite, battery works are basically the same. The main difference lies in the difference of electrolytes used in lithium ion batteries, liquid is a liquid electrolyte, and polymer lithium ion battery with solid polymer electrolyte to replace, the polymer can be a" dry", or " colloidal", at present most of the polymer gel electrolyte.

Polymer lithium ion battery can be divided into three categories

(1 ) solid polymer electrolytes for lithium ion batteries

Electrolyte for polymer and the mixture of salt, the battery at room temperature ionic conductivity is low, and is suitable for high temperature use.

(2 ) gel polymer electrolytes for lithium ion batteries

Namely, in the solid polymer electrolyte adding plasticizer and other additives, so as to improve the ion conductivity, so that the battery can be used at room temperature.

(3 ) polymer cathode materials for lithium ion batteries

Using conductive polymer as cathode materials, the ratio of energy is the existing lithium ion battery 3 times, is the latest generation of lithium-ion batteries. As a result of using solid electrolyte instead of a liquid electrolyte, and the liquid lithium-ion battery, polymer lithium ion battery with thin, any area with arbitrary shape and other advantages, no liquid leakage and explosion and other security issues, so it can be used with aluminum-plastic composite film manufacturing battery casing, which can improve the whole battery capacity ; polymer lithium ion battery can also uses polymer as cathode materials, the mass ratio of energy will be greater than the current of liquid lithium ion battery is improved by more than 50%. In addition, polymer lithium ion battery in working voltage, charge-discharge cycle life and other aspects than the lithium ion battery is improved. Based on the above advantages, polymer lithium ion battery was known as the next generation of lithium-ion batteries. Polymer lithium ion ( Lithium ion polymer) batteries with high energy density, small and thin, lightweight, Gao Anquan, long cycle life and low cost of the new battery. Therefore, in the next 2 to 3 years, lithium polymer batteries instead of lithium ion battery market share of 50%.

Principle

Lithium ion battery has the liquid lithium-ion battery ( LIB) and polymer lithium ion battery ( PLIB) two class. The liquid lithium ion battery refers to the Li + intercalation compounds as positive and negative two batteries. Anode lithium compounds LiCoO2, LiNiO2 or LiMn2O4, negative use of lithium - carbon intercalation compound LixC6, typical battery system for

(- ) - EC+DEC LiPF6 C | | LiCoO2 ( + )

The anode reaction : LiCoO2 = Li1-xCoO2+xLi++xe - - (2.1 )

The cathode reaction: 6C+xLi++xe = LixC6 - (2.2 )

Battery total reaction: LiCoO2+6C = Li1-xCoO2+LixC6 - (2.3 )

Polymer lithium ion battery principle and liquid lithium is same, the main difference is the electrolyte and lithium. The main structure comprises a battery cathode and anode and electrolyte of three elements. The polymer lithium ion battery is said in these three kinds of main structure in at least one or more than one using polymer materials as the main battery system. In the current development of polymer lithium ion battery system, polymer material is being applied to the anode and electrolyte. Positive electrode material includes a conductive polymer or general lithium ion battery using inorganic compounds, electrolyte can use solid or gel polymer electrolytes, or organic solution, general lithium ion technology using liquid or gelled electrolyte, therefore need a strong two packaging to accommodate the combustible constituents, this increased weight in addition also limits the size of the flexibility. While the polymer lithium ion technology without extra electrolyte, so it is more stable, is not easy because the battery overcharge, collision or other damage, as well as excessive and dangerous situation.

A new generation of polymer lithium ion battery in shape can be thin ( ATL battery the thinnest of up to 0.5 mm and a phase in a card thickness ), any area and any shape, greatly improving battery design flexibility, which can be made into any shape with the product demand and capacity of the battery for application developers, equipment in power solutions provides a high degree of flexibility and adaptability, to maximize the optimization performance of their products. At the same time, polymer lithium ion battery unit energy than current general lithium ion battery is increased by 50%, its capacity, charge and discharge characteristics, safety, operating temperature range and cycle life ( more than 500) and environmental protection and other aspects of performance than the lithium ion battery is substantially improved.