Powerbinder® -Water Soluble Binder For Lithium Ion Batteries- Powerbinder®

Powerbinder® characteristic ・Electrodes can be mede by aqueous process ・No Aluminum current collector corrosion by pH adjustment feature ・Maintain battery performance at high temperature and voltage operation Comparing with other binder Conventional Conventional Powerbinder® non-aqueous binder aqueous binder Components Natural materials PVDF Carboxymethyl cellulose(CMC) Slurry solution Water NMP Water pH adjustment ◯ - X Application Cathode, Anode Cathode, Anode Anode Durability for high High temperature：◯ High temperature：× High temperature：△ temperature & voltage High voltage：◯ High voltage：◯ High voltage：△ Powerbinder®

Lineup

miscibility with pH adjuster* Products latex binder like SBR Application

B01 × ◯ Graphite, SiOx and Si

B03 ◯ ◯ NMC(111) and LTO

High voltage cathode B05 ◯ ◯ (LNMO and other) High-Ni contents cathode P01 ◯ ◯ (NMC532, 622, 811 and NCA) *Products with pH adjuster characteristic can maintain neutral aqueous solution condition of lithium oxide active material electrode slurry without corrosion of aluminum current collector. Powerbinder®

NMC811 + P01 electrode NCA+ P01 electrode Electrode preparation example with Powerbinder No aluminum corrosion 1. Mixing active material, carbon additive and Powerbinder on powder condition.

2. Adding water to suitable value.(Typical solid contents is about >70%)

3. Adding latex binder as necessary.

4. Slurry coat to Al current collector.

Powerbinder storage condition • Temperature: below 25 ℃ • Humidity: 40~60%

Electrode composition NMC811 or NCA:AB:P01:latex=93:3:3:1 Powerbinder® Battery performance

Cell type:Coin cell(NCA 12 mg cm-2) Cell type:0.8Ah laminated cell(NCA 15 mg cm-2) Cathode/anode : NCA+P01/Lithium Cathode/anode : NCA+P01/Graphite+B01 Voltage range : 3.0-4.3 V Voltage range : 2.5-4.15 V Current rate : 1C=180 mA g-1 Current rate : 1C Powerbinder®

Performance comparison with PVDF binder -Experimental- Laminated cell spec Capacity：40 mAh Separator — + Cathode：NCA:AB:P01:latex=93:3:3:1 Anode NCA:AB:PVDF=93:3:4 Anode：Graphite:AB:B01:SBR=94:3:1.5:1.5 Separator：Polyolefin Cathode Electrolyte：1 M LiPF6/EC:DEC(3:7) 6cm Formation condition Voltage range：2.7-4.2V Current：1st 0.1C(=18 mA/g), 2-10th 0.2C 3cm Temperature：25℃ ※Electrode coated area →Cycle durability test and discharge test Powerbinder®

Performance comparison with PVDF binder -cycle durability- Powerbinder P01 PVDF

Cell type:40 mAh laminated cell (NCA 12mg/cm2) Cell type:40 mAh laminated cell (NCA 12mg/cm2) Cathode/anode : NCA+P01/Graphite+B01 Cathode/anode : NCA+PVDF/Graphite+B01 Voltage range : 2.7-4.2 V Voltage range : 2.7-4.2 V Current rate : 1C Current rate : 1C Powerbinder®

Performance comparison with PVDF binder -discharge performance- Powerbinder P01 PVDF

Cell type:40 mAh laminated cell (NCA 12mg/cm2) Cell type:40 mAh laminated cell (NCA 12mg/cm2) Cathode/anode : NCA+P01/Graphite+B01 Cathode/anode : NCA+PVDF/Graphite+B01 Voltage range : 2.7-4.2 V Voltage range : 2.7-4.2 V Current rate :0.2, 1, 2, 5, 10C Current rate : 0.2, 1, 2, 5, 10C Powerbinder®

Performance comparison with PVDF binder -Peel strength-

90° Peel strength test(JIS-Z0237)

Tape：Nice tack(NW-40) Tape wide：15 mm Speed：50 mm min-1 Electrode condition •NCA:AB:P01 = 93:3:4 •NCA:AB:P01:latex=93:3:3:1 •NCA:AB:PVDF=93:3:4 →NCA load mass:12mg cm-2 Powerbinder®

LNMO+B05 electrode LTO+B03 electrode No aluminum corrosion Battery performance

Cell type:Coin cell(LNMO 15 mg cm-2) Cathode/anode : LNMO+B05/LTO+B03 Voltage range : 1.5-3.4 V Current rate : 1C

Electrode composition LNMO:AB:B05=91:6:3 LTO:AB:B03:latex=93:3:2:2