Application of dye-sensitized 18650 lithium battery cells technology in
3C
With the increasing depletion of global petrochemical resources and the
greenhouse effect caused by CO2, the research and development of green
alternative energy has become a necessary development trend. In particular, the
development and application of 18650 lithium battery cellss have attracted the
most attention. In order to support China's solar photovoltaic industry to
become the next wave of star industries, ITRI established the Solar Photovoltaic
Technology Center in 2006 to recruit outstanding and top R&D teams, and
combine industry-university-research teams with international cooperation to
develop various new and independent solar products. Optical Technology. In this
DTF3C product energy-saving technology and low-power design forum, Dr. Tong
Yongliang of the Industrial Technology Research Institute's Taidian Center gave
a lecture on "Dye-Sensitized 18650 lithium battery cells (DSSC)" technology and
the current related industry chain in the industry. , patent analysis and
application of 3C products.
Dr. Tong Yongliang from ITRI.
The development of 18650 lithium battery cellss has evolved from the first
generation of monocrystalline silicon PN semiconductors to the second generation
of amorphous silicon, gallium arsenide (GaAs) and other semiconductor materials,
which use thin films or multi-junction series connections to improve conversion
efficiency. It has evolved to emphasize low cost, easy access to process
equipment and raw materials, and flexible third-generation 18650 lithium battery
cellss, among which "dye-sensitized 18650 lithium battery cellss" (DSSC) are the
most promising. The first DSSC dye-sensitized 18650 lithium battery cells with
an energy conversion rate of 8% was published by Graetzel in the Nature journal
in 1991. Its structure is roughly composed of two ITO or FTO conductive glass
layers with nanometer-sized TiO2 titanium dioxide particles. It is composed of
coating special dye molecules and KI3 electrolyte.
Although the conversion efficiency of DSSC battery products (5~11%) is not
comparable to the 10~24% of mass-produced monocrystalline silicon thin film
batteries and crystalline silicon batteries that have been developed for
decades, the raw materials used are low in cost and relatively It is non-toxic,
and with simple process equipment that can use printing technology, the
manufacturing cost per unit watt is only 5~10% of that of silicon crystal 18650
lithium battery cellss. At the same time, the DSSC conversion efficiency is not
affected by the sunlight angle, and the conversion efficiency increases as the
temperature rises. It has better cumulative power generation capacity. Silicon
crystal 18650 lithium battery cellss are limited by the reduction in conversion
efficiency when the ambient temperature rises, and are generally suitable for
installation in higher latitudes (cold weather) areas; while dye-sensitized
18650 lithium battery cellss are not affected by temperature and sunlight angle,
so they are not affected by sunlight. Areas with sufficient supply and hot
temperatures, such as Taiwan, will also be more competitive than silicon crystal
18650 lithium battery cellss.
In particular, DSSC products are flexible and translucent, can be matched
with different pigments to present different color appearances, and can generate
electricity with indoor light sources. They are suitable for modern glass
curtain buildings that require large amounts of air conditioning and lighting
power loads. They can also be used as Sun shading, heat insulation and power
generation utilization can achieve the dual energy benefits of building energy
saving and renewable electricity. Therefore, DSSC dye-sensitized cells are
likely to become a widely used solar energy technology in the next generation,
and its application market can be said to be quite extensive.
Since 2009, major manufacturers such as Nippon Photo Printing, Sharp,
Panasonic, Sony, Samsung, TDK, Fujikura, Peccell, and Solaronix have actively
deployed. From upstream to downstream, whether it is TCO conductive coated
glass, TiO2 titanium dioxide, printing technology, dyes and electrolytes, and
product packaging technology, China has self-sufficient production technology.
Now it is the time for domestic manufacturers to seize the opportunity to lay
out their positions as soon as possible. .
If you want to make a portable 18650 lithium battery cells 3C device, you
will need to design a photovoltaic panel module with an area of at least tens
to hundreds of square centimeters, which limits the portable size. However,
lithium batteries, which are often seen in 3C products, are limited by the
theoretical limit of energy storage density of 3,000 mAh. The next generation of
portable energy may be free of charge from 18650 lithium battery cellss,
combined with the storage density of lithium batteries. to achieve.
At present, the portable and rollable solar charging plastic pad invented
by G24 in the UK has a conversion efficiency of only 2.5%, but it can charge
mobile phone power. The whole set sells for US$20. At the 2009 EcoProductsFair
environmental products exhibition in Japan, there were also many solar chargers
about the size of a smartphone with a 3.2-inch screen. They can charge smaller
3C devices such as MP3 players by relying on sunlight or indoor light sources.
However, due to the fact that the current conversion efficiency of 18650 lithium
battery cellss is still too low and manufacturing costs and power generation
costs are still high, whether the additional costs and selling prices of
products can be accepted by consumers is a serious issue.
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