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 operationComparing with other binder

Powerbinder® Conventional non-aqueous binder

Conventional 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 temperature &

voltage

High temperature：◯

High voltage：◯High temperature：×

High voltage：◯High temperature：△

High voltage：△

Powerbinder®Lineup

Products pH adjuster*

miscibility with latex binder like SBR Application Characteristic

B01 - ◯ Graphite, SiOx and Si For anode with no need pH adjuster

B03 ◯ ◯ NMC(111) and LTO Standard type

B05 ◯ ◯ High voltage cathode (LNMO and other) High oxidation durability type

P01 ◯ ◯ High-Ni contents cathode (NMC532, 622, 811 and NCA) High neutralization type

P03 ◯ ◯ LCO cathode (Applicable to high voltage)

Middle oxidation durability and neutralization type

*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®

Electrode preparation example with Powerbinder

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%

NMC811 + P01 electrode NCA+ P01 electrode

Electrode composition NMC811 or NCA:AB:P01:latex=93:3:3:1

No aluminum corrosion

Laminated cell specCapacity : 40 mAhCathode : • Powerbinder NCA:AB:P01:latex=93:3:3:1• PVDF NCA:AB:PVDF=93:3:4

Anode : Graphite:AB:B01:SBR=94:3:1.5:1.5Separator : PolyolefinElectrolyte : 1 M LiPF6/EC:DEC(3:7)

※Electrode coated area

6cm

3cm

— +

Formation conditionVoltage range : 2.7-4.2VCurrent : 1st 0.1C(=18 mA/g), 2-10th 0.2CTemperature : 25℃→Cycle durability test and discharge test

Separator

Cathode

Anode

Powerbinder®Performance comparison with PVDF binder -Experimental-

Powerbinder®Performance comparison with PVDF binder for NCA-cycle durability-

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

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

Powerbinder P01 PVDF

Powerbinder®

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

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

Powerbinder P01 PVDF

Performance comparison with PVDF binder for NCA-cycle durability-

Powerbinder®

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

Performance comparison with PVDF binder for NCA-cycle durability-

Powerbinder®Performance comparison with PVDF binder for NMC622 -cycle durability-

Cell type:40 mAh laminated cell (NMC622 14mg/cm2) Cathode/anode : NMC622+P01/Graphite+B01 Voltage range : 2.7-4.2 V Current rate : 1C

Cell type:40 mAh laminated cell (NMC622 14mg/cm2) Cathode/anode : NMC622+PVDF/Graphite+B01 Voltage range : 2.7-4.2 V Current rate : 1C

Powerbinder P01 NMC622:AB:P01:latex=95.5:1.5:2.5:0.5

PVDF NMC622:AB:PVDF=95.5:1.5:3

Powerbinder®Powerbinder with NMC532 & LCO-cycle durability-

Cell type:35 mAh laminated cell (NMC532 14mg/cm2) Cathode/anode : NMC532+P01/Graphite+B01 Voltage range : 2.7-4.2 V Current rate : 1C

Cell type:40 mAh laminated cell (LCO 16mg/cm2) Cathode/anode : LCO+P03/Graphite+B01 Voltage range : 2.7-4.2 V Current rate : 1C

Powerbinder P01+NMC532 NMC532:AB:P01:latex=96.5:1.5:1.5:0.5

Powerbinder P03+LCO LCO:AB:P03:latex=95.5:3:1:0.5

Powerbinder®LNMO+B05 electrode LTO+B03 electrode

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

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

No aluminum corrosion