CMC Battery BVH9 Dongying linguang has obtained BRC Level A
Certification, Safety Standardization Level II Enterprise Ce
Dongying Linguang was established in 2010 in Donying, Shandong
Province China. We are the professional manufacturer of CMC (Sodium carboxymethyl cellulose) and PAC (Poly anionic
cellulose) in China. Output reaches 20000 metric tons per year.We take great
pride in our product quality and have been working with top Clients
for years. We are ISO9001,ISO14001, ISO22000 and HACCP,BRC,Halal
and FSSC 22000 certified company.
CMC, with the strong cohesion, good heat stability, electrical
conductivity and electrochemistry property, makes the active
substance and electrolyte form the even and dispersive paste, and
takes the hydrogen bond effect with the silicon, therefore, it is
not only widely used as the binder of cathode and anode, gel for
cathode protection, but also widely applied in the silicon base
electrode and graphite modification.
1. Application in binder of cathode and anode
Binder has the great impact on the electrode property of the
battery. Appropriate binder can effectively change the general
performance of the electrode, and make the active substance,
conductive agent and current collector contact evenly, and enhance
the completeness of the electrode. As the binder, CMC can be widely
applied in the kinds of electrode material such as lithium battery,
natural graphite, mcmb, lithium titanate, tin-based, silicon-based
negative electrode material and iron-phosphate-based lithium
cathode material etc. It greatly enhances the battery capacity,
circulation stability and lifespan circulation. CMC shows the
effect in the binder of cathode and anode as follows:
*bind the active substance, conductive agent and current collector
together;
*Fix firmly electrode material on the current collector;
*Excellent conductivity reduces the impedance between electrode
material and current collector;
*Excellent electrochemistry property extends the battery capacity;
*Good heat stability enhances the battery circulation stability and
lifespan circulation;
*Good electrochemistry stability, and stable with the electrode
material and electrolyte;
*Release the expansion and shrink during the li-battery in charging
or discharging;
*Less usage, strength bind, low load discharging;
*Safety, eco-friendly, and low cost.
2. Application in gel for cathode protection
As the gel, CMC can make the active substance and electrolyte form
the even and dispersive paste, maintain the electrolyte evenly
around the active granule, and make the electrolyte evenly and
sufficiently cover the active granule surface when battery
discharges, meanwhile, it prevents the active granule and
electrolyte in the storage from being unevenly settled.
Furthermore, it promotes the contact effect between active granule,
active substance and collector, and prevents the battery from
voltage abnormal dropping when the battery is suffered from the
shake or during use. CMC which is applied in gel for cathode
protection will show the effect as follows:
*Good viscosity and liquid absorption, and high linearity
tractility;
* With a certain viscosity and effectively prevent the battery
active substance from being dehydated.
*Good stability, less layering, and good property for battery
storage;
*Enhance the electrolyte absorption rate and reduce the electric
resistance;
*Use under the normal temperature, and avoid the fluctuation in the
end of the terminal voltage of intermittence discharging;
*Good liquid retention, and keep the good performance when the
battery is under the normal temperature or high temperature;
*little swaying under the circumstance of negative electrode, and
battery stable performance after falling and shaking;
*mix with sodium acrylate and greatly enhance the high current
discharge performance of the battery
3. Application in silicon-based electrode
CMC used in the silicon-based electrode, besides the heat
stability, conductivity and electrochemisty, the strong hydrogen
bond exists between CMC and silicon. Hydrogen bond has the
self-recovery, and it can adjust the stress which continuously
enlarge during the circle process of the material and so that it
can maintain the stability of the material structure, and keep the
capacity over 1000mAh/g during at least 100 times circulation, and
the coulombic efficienty reaches 99.9%. CMC which is applied in
silicon-based electrode will show the effect as follows:
*With the strong shear-thinning property, CMC can adjust the
rheoloty of the slurry;
*Excellent circulation, primitive reversible capacity and better
capacity retention;
*Effectively cushion the change of the volume swelling of the
silicon-based electrode, and improve the electrode reversibility;
*With the double optimization to mechanics stability and the
chemistry stability, CMC promotes to form the SEI film;
* CMC impacts on silicon granule, and reduces the damages for
silicon-based electrode volume swelling;
*Effectively inhibit the side-reaction between high reactive Li-Si
alloy and electrolyte;
*Use with other gel binders, and enhance the binding strength and
activation properties.
4. Application in graphite modification
With the good coating effect to the natural graphite, CMC can
effectively improve its surface quality, inhibit the strong
reduction reaction of electrolyte on the surface, prevent the
solvation ion from being into the graphite layer leading to the
structure delamination, enhance the electrochemistry property of
the natural graphite, and effectively produce the exfoliation
phenomenon in the process of charging or discharging of the
graphite. Therefore, it effectively increases the circulation
stability of the carbon composite and improve the battery stability
and performance. CMC which is applied in graphite modification will
show the effect as follows:
*The formed resin carbon can make the lithium ion diffuse to
internal of the graphite through the resin carbon;
*Prevent the solvation and lithium ion from being embedded
together, and weaken the reduction reaction which the solvent
molecule impacts on the electrode;
*Graphite circulation property is obviously increased after coating
treatment, and effectively inhibit the capacity reduction of
graphite;
*Effectively increase the retention rate of discharging platform
and discharging capacity.
