Showa Denko K.K. (SDK) Starts Volume Production of LIB Anode Bin

Showa Denko K.K. (SDK) Starts Volume Production of LIB Anode Binder 
Tokyo, Feb 26, 2013 - (JCN Newswire) -  Showa Denko K.K. (SDK) has started
volume production of "Polysol(TM) LB Series" water-based anode binder
for lithium ion batteries (LIBs) at its Tatsuno Plant in Tatsuno City, Hyogo
Prefecture. 
The product is a water-based emulsion containing acrylic synthetic resin
particles, ensuring lower environmental impact at the time of production
compared with solvent-based binders.  It provides such advantages as low
electrical resistance, good temperature characteristics, and good adhesion to
anode collectors, thereby contributing toward extending the life and increasing
the capacity of LIBs.  Having improved the product properties based on the
results of sample evaluation by potential customers, SDK has decided to sell
the product on a commercial scale. 
Development of LIB technology is being accelerated.  This is because small
LIBs for high-performance smartphones and tablets need to become thinner and
have higher capacity.  Also, large LIBs for industrial/home storage batteries,
electric vehicles and hybrid cars should have high capacity, long life, and
good durability under severe working conditions. 
In addition to the four major LIB components (cathode material, anode
material, separator, and electrolyte), binders are a target of technological
development as they significantly influence the performance of LIBs. 
A binder causes cathode/anode active materials (for release and intake of
lithium ions) to stick together.  It also causes additives to stick together,
and active materials to adhere to collectors.  While styrene-butadiene rubber
(SBR) is mainly used in binders, it has a problem of deterioration at high/low
temperatures. 
Compared with SBR, "Polysol(TM) LB Series" can improve temperature
characteristics by around 10%, in terms of the maintenance of capacity at the
time of charge/discharge after preservation at a high temperature (60 degrees
C) and in service capacity at a low temperature (-20 degrees C). 
Furthermore, it exhibits high binding property with addition of a small amount
due to its high dispersibility, and increases adhesion to anode collectors
(made of copper) by 1.5 times, enabling reductions in inner electrical
resistance.  Thus, "Polysol(TM) LB Series" will contribute toward
extending the life and increasing the capacity of LIBs. 
The Showa Denko Group will continue to fully utilize its proprietary
inorganic, aluminum and organic chemical technologies to improve the
performance of its LIB-related products, including anode material, additive in
anodes/cathodes, packaging material, and binder.  At the same time, the Group
will provide total solutions to customers, making proposals on ways of
combining various components to better meet their requirements. 
About Showa Denko 
Showa Denko K.K. ('SDK'; TSE: 4004, US: SHWDF) is a major
manufacturer and marketer of chemical products serving a wide range of fields
ranging from heavy industry to the electronic and computer industries. SDK
makes petrochemicals (ethylene, propylene), aluminum products (ingots, rods),
electronic equipment (hard disks for computers) and inorganic materials
(ceramics, carbons). The company has overseas operations and a joint venture
with Netherlands-based Montell and Nippon Petrochemicals to make and market
polypropylenes. In March 2001, SDK merged with Showa Denko Aluminum Corporation
to strengthen the high-value-added fabricated aluminum products operations, and
is today developing next-generation optical communications-use wafers. For more
information, please visit www.sdk.co.jp . 
Contact: 
Showa Denko K.K. (SDK)
Public Relations Office
Tel: +81-3-5470-3235 
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