The polymer lithium battery is a chemical battery. Compared with previous batteries, it has the characteristics of high energy, miniaturization and light weight.
The
so-called lithium polymer battery refers to a battery system that uses
polymer materials for at least one or more of the three elements. In
lithium polymer battery systems, most polymer materials are used for the
positive electrode and electrolyte. The positive electrode material
adopts the conductive polymer or inorganic compound used in general
lithium ion batteries, the negative electrode mostly adopts metal
lithium or lithium carbon intercalation compound, and the electrolyte
adopts solid or colloidal polymer electrolyte or organic electrolyte.
Since there is no excess electrolyte in the lithium polymer, it is more
reliable and stable.
The working principle of polymer lithium battery
There
are two types of lithium ion batteries: liquid lithium ion batteries
and lithium polymer batteries. Among them, the liquid lithium ion
battery refers to a secondary battery with Li+ intercalation compound as
the positive and negative electrodes. The positive electrode adopts
lithium compound LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode
adopts lithium carbon intercalation compound LixC6. A typical battery
system is:
(-) C | LiPF6—EC+DEC | LiCoO2 (+)
Positive electrode reaction: LiCoO2 = Li1-xCoO2 + xLi+ + xe-
Negative reaction: 6C + xLi+ + xe- = LixC6
Total battery reaction: LiCoO2 + 6C = Li1-xCoO2 + LixC6
The principle of lithium polymer battery
is the same as that of liquid lithium, but the main difference is that
the electrolyte is different from liquid lithium. The main structure of
the battery includes three elements: positive electrode, negative
electrode and electrolyte. The so-called lithium polymer battery refers
to the use of polymer materials as the main battery system in at least
one or more of these three main structures. In the lithium polymer
battery system developed, polymer materials are mainly used for the
positive electrode and electrolyte.
Cathode
materials include conductive polymers or inorganic compounds commonly
used in lithium-ion batteries. The electrolyte may use a solid or gel
polymer electrolyte or an organic electrolyte. Generally, lithium ion
technology uses liquid or gel electrolyte, so it needs high strength.
The secondary packaging contains flammable active ingredients, which
increase weight and limit size flexibility.
The shape of the new generation of lithium polymer battery
is theoretically achievable, and the shape is diversified, which
improves the flexibility of battery shape design, so that it can meet
product needs, and make some shape and capacity batteries for
application equipment developers. Provide a high degree of design
flexibility and adaptability in the power supply solution to maximize
its product performance. At the same time, the unit energy of lithium
polymer batteries is 10% higher than that of general lithium ion
batteries. Compared with lithium-ion batteries, its capacity and cycle
life have been greatly improved.
BENZO Energy Technology Co.,Ltd
UFine Technology Co., Ltd
Site: www.bz-battery.com / www.benzoenergy.com
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