Binders for lithium ion batteries
Extending battery life
The electrode of lithium ion battery is generally made by mixing the active material, conductive auxiliary agent or binder with the solvent, and applying the solution to the electrode. Binder is used for binding active material to active material, conductive auxiliary agent or collector. We have the CLPA series which is crosslinking polyacrylic acid binder in our lineup.
This binder has been developed for use with high capacity Si type anodes. Si type is the emerging anode technology for next generation lithium ion rechargeable batteries. CLPA inhibits the collapse of the negative Si electrode that is caused by the repeated volume change during charge/discharge.
Performance of CLPA on Si and graphite composite electrode
Binder covers over the active material and firmly binds Si to the graphite.

CLPA-W11
- It is suitable for Si system anode.
- It is crosslinking polyacrylic acid, partially neutralized composition and 10% solution.

Properties
Appearance | Form: 10% solution Color: transparent ~ slightly light brown |
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Solubility | Water: soluble |
Storage | Room temperature |
CLPA-W11: Si system half-cell data
Testing conditions
Electrolyte | 1M LiPF6 EC/DMC(1:1 volume ratio) with 2(v/v)% FEC. |
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Cell | 2032 formed coin cell , counter Li foil. |
Anode | Si:AB; CLPA-W11=70:15:15(solid contents ratio) |
Anode loading | 1.5mg/cm2 |
Charge/Discharge conditions | Charging:0.2C, CC, up to 1200mAh/g Discharging:0.2C, CC, 2.0V cutoff |


■CLPA-W11 ■CMC-SBR
CLPA-W11 has higher battery performance than that of CMC-SBR.
Related laws and regulations
TSCA | Listed |
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EINECS | Not Listed |
REACH | Not Listed |
CLPA-C07
- It is suitable for composite anode composed of graphite and SiO system.
- It is a crosslinking copolymerized polymer composed of acrylic acid and hydrophobic monomer, and 10% solution.

Properties
Properties | Form: 10% solution Color: transparent ~ slightly light brown |
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Solubility | Water: soluble |
Storage | Refrigeration |
CLPA-C07: SiO system full-cell data
Testing conditions
Electrolysis | 1M LiPF6 EC/DMC(1:1 volume ratio) + VC 1wt%, FEC 1wt% |
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Cell | pouch (35 mAh) |
Cathode | NCA : AB: PVDF =93 : 3 : 4 |
Anode | SiOC : Graphite : KB : CLPA-C07=32.5 : 56 : 3 : 8.5 |
Anode loading | 3.5mg/cm2 |
Charge and discharge condition |
1st:Charge:0.1C, CCCV, 4.2V, 16h cut off Discharge:0.1C, CC, 2.5V cutoff 2nd ~4th:Charge : 0.2C, CCCV 4.2V, 8h cut off Discharge : 0.2C, CC, 2.5V cutoff after 5th:Charge : 0.5C, CCCV 4.2V, 3h cut off Discharge : 0.5C, CC, 2.5V cutoff |
Testing temperature; 25 ℃

CLPA-C07: Charge/Discharge efficiency and AC impedance at the 1st cycle
Testing conditions
Anode | Active materials (SiOC: Graphite=30:70) : Graphite : Binder= 89 : 6 : 5 |
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Anode loading | 8.8mg/cm2 |
Charge/Discharge conditions | 0.1C, CCCV charge and CC discharge, 0V-2.0V. |
Measuring temperature of AC impedance | 25 ℃ |
Charge/Discharge conditions | Charging:0.2C, CC, up to 1200mAh/g Discharging:0.2C, CC, 2.0V cutoff |


CLPA-C07 has higher charge/discharge efficiency at the 1st cycle and lower AC impedance of anode than those of CMC-SBR.
Related laws and regulations
TSCA | Not Listed |
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EINECS | Not Listed |
REACH | Not Listed |
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