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From a practical point of view, pressure stability plays a pivotal loss in the lithium-ion batteries. In addition, other easy mechanical and conductive properties, dispersion, the property of polymer also affect the electrochemical performance. For example, unregulation of active material and conductive additives can lead to decrease in capacity.

here when the active material and the conductive agent orderly located in the the electro surface they can form the some good electron transport and the lithium ion the transport but so when you think about like this one

At a time they don't have a good electron transport and ion transport. They inhabit their battery cycling performance. So to increase dispersion properties, some researchers reported that using dispersion agents such as a surfactant or designed the polymer with the various ionic charged functional groups. One of the examples is saponin. There's a pattern already known as health.

is including a lot of things in the Hongshan so but then in the structures there were some interesting they have a two part one is they have a lot of hydrox functional groups hydrophilic but on this part they don't have as a functional groups hydrophobic so they have a two the part one is the hydrophobic and hydrophilic so they can lower their suspectant

The O-inch advantage of the good electrochemical stability, easy processor with high mechanical transfer and high electrical uptake. The PVDF is the dominant binder. Bottom PVDF is not a good choice for the high voltage cathode materials. Why do we need the high voltage the cathode already we learn about the

in the chapter one about the lithium batteries. So when we get more the energy density, if we increase the voltage, the nominal voltage, we can get more the energy. So for increased cathode the voltage is one of the important for the high energy.

the one of the examples is the dextran sulfate lithium is used as effective binder in the lithium cobalt oxide so where the dextran the sulfate lithiums form the hydrogen bond with LCO particles looks like here

and then they inhibit the dissolution of the transition metals. So transition metals like this NMC for example when they are charged and discharging repeatedly some kinds of the metal cation like nickel or mangan cobalt can diffuse into the electrolyte. So that means we lose the battery capacity but if the polymer binder capture of them and they come back to the active material at the time we can maintain the battery cycling performance.

some dextran and the sulfate of lithiums, the CMC or sodium alginate bind and the amoeuvre structure also they can form the uniform protective layer onto the surface of the high voltage the casted materials so if they form the protective the film onto the surface looks like here so at the time they suppress the transition metal ion disillusion and the good SEI deformation

also one of the good examples for the sulfur battery, the sulfur cathode. Sulfur battery is quite common and some representative the next generation battery due to their high energy density and the roll-coats and a lot of things. But one of the major issues associated in working in the lithium sulfur battery is drastic volume change.

80% but NMC, LCO, LFP usually below the 7% or 10% below. Very low volume changes but in the sub-batteries 80% volume changes. So this causes a drastic volume change. Cycling can lead to the polarization and cracking the cathode structure. Therefore, designing the binder with a mechanically strong polymer binder can up to the extent overcome these boring deformation issues. Normally employ the linear polymer like its PVDF.

DTFE mostly failed to provide the mechanical strength and the accommodator strength during the repeated cycle. Therefore, polymer network binder with three-dimensional structure, repeated connection, and the interaction are made useful stabilizing the cathode and enhancing the overall mechanical property of the electrode. So like as these kinds of the image, the utilization of the natural derived polymer with the abundant functional groups,

These kinds of things not only enhance the macaic property by inducing hydrogen bonding, but also increase the opportunity to improve stability to absorb the poly sulfide things.

In addition, there is a case where the functionalizes the form of polymer bind by cross-linked kytosins. So one of the natural polymer, already we previously studied, with the grapid oxide. Through the cobalt-like bonding, they bond together and also they can have the hydrogen bondings. In that case, not only where the mechanical property

of polymer binder is enhanced, more electrical, the conductivity also is improved, resulting in this new type of polymer binder. So as a search natural polymer possesses the various functional groups, making it easy to impart functionality and therefore hold great potentials. So as one of the most promising energy material for the next generation lithium-ion battery, the naturally abundant silicon.

has attracted considerable research attention because of its outstanding theoretical capacities to specific capacities almost 4200 is very huge than commercial graphite the huge challenge for realising applications of the silicon anode is the significant volume change up to 300% or into the...

insertion and the extraction of the lithium ions from the silicon during the charge and discharge. As a result, the series of the the disadvantages of the bad effect occurred successfully accompanying the mild rifted expansion and contraction in the silicon volumes. So when the radiation the silicon particle is purplicated, looks like here.

after many cycles they damaged the electrode structure and they lose the electrical contact with the electrical materials so finally the battery looks like here they degrade a lot of things to satisfy these kinds of requirements for the ideal silicon anode they must have mitigated like things the

good interfacial compatibility, good mechanical property, and good ionic lateral conductivity. And finally, self-healing function would be the best option to improve the silicon anode. So for silicon anode, there are some good binder design things we already talked about. Like here, the good mechanical property with the high mechanical strength and the excellent flexibility. And the good silicon anode material with the good interfacial compatibility. One of the easy thing, the silicon particle has the

sometimes they have a lot of the OH group but if we some polymer have a COH or OH looks like here they can form a lot of intermolecular interaction like hydrogen bonding sometimes covalent bonding at the time they form good interfacial conductivity. The high ionic electrolyte conductivity so there are two options one is the using conductive polymer

all good dispersion properties. There are two types of things. So designing these kinds of functionality to the polymer binder at the time, that is good. Finally, we already talked about the self-healings. So self-healings is expected to be able to repair the damaged electrode structure. That is the unavoidable after suffering from the huge volume chains.

So already you know the self-healing is the dynamic force. So it's one of the good dynamic force that can provide the good effect for maintaining the electrical structure related to the good cycling stability. The recent world-money effort to expropriate solid state batteries as potentially the safe and the high

energy density, so a lot of things. Let's talk about the typical structure of this. All solid-state batteries are very simple, consisting the anode, hot and the cathode material and just solid electrolyte without the separator. Among these, the most critical material is the solid-state electrolyte. If the solid-state electrolyte cannot efficiently

the battery can operate. There are various types of solar electrolytes including the oxide, polymer, halide, sulfide, a lot of things. Among them, still we are studying about the polymer but still the chromizing material is the sulfide based materials due to their high ionic conductivity looks like here and the good processibilities.

So that is still the good options. Cell-Py's solicited electrolytes offer the high ionic conductivities, good mechanical properties making them promising all solicited batteries. However they face the challenge like as in these kinds of things.

like as the instable in air and poor compatibility with the electrode because of the oxidation the property and the chemical the stability is not good. These kinds of issues hindered the widespread adoption in the practical applications. Furthermore, the conventional study and the battery area have typically fabricated solid-state battery by applying the high-pressure from the pallet.

However, this method poses a limitation in terms of scalability productivity and applies pressures around over 300 MPa, which not only incurred high costs but also requires specialized equipment limiting the productivity. Therefore, there is a growing need to transition from the pallet to fibulum type electric manufacturing, similar to conventional battery electrode productions. However, sulfide-based solid electrolyte is a high- high-

reactivity which leads to comparability issues like as just increasing some kinds of the polarity of the solvent they can decompose it to the another the materials so looks like the most of the polar organic solvent they have a some high reactivity so this kind of thing is a significant challenge to change the seat type

the film, the slowly castings. From this first fact, the design of the binder for sulfide-based solid electrolyte has emerged a new key research topic. To prevent undesirable reaction with the sulfide-solid electrolyte, processing must be conducted in non-polar solvent. However, since non-polar-polimab are typically sold in the non-polar solvent,

they tend to exhibit four adhesions why is the adhesion is four is because of becoming difficult to realize molecular interaction like those previously this curves like a hydrogen bonding ionic bonding looks like here is not possible therefore overcoming this the trade-off polar binder non-polar binder looks like here is the core of the some technology for the binder design for all state state batteries

accordingly elastic yet non-polar solvent soluble polymer is the rubber so one of the good thing is nitrile-vitation rubber sometimes we use the glove so these kinds of the nitrile-vitation rubber have been widely applied as a binder however limitations still remain NBr is good things in soluble in like this toluene it's non-polar the material looks here

Bottom there, the mechanical property is quite elastic, but the dispersion or the adhesion property with self-isolated electrolyte is not good. So as a summary, all polymer binders are used in very small amounts, make it low, 5%. They play a crucial role in the battery electrical fabrication. In this section, we explore the various type of polymer binders quickly. In particular, we observe how the role of the transition battery binder has evolved from the

serving as a mechanical regulator. The bottom is the change to the electrical, chemical, and mechanical regulator. Both type thing is very important for the next generation of battery serving. Furthermore, we learned how their load is expanding even further in the vaccination battery such as a Soli-Sate,

batteries where they are now being applied the binder for solid left light as such polymer are indispensable materials so whose value can vary significantly depending on how we design looks like here and applying them thank you very much