Polyimide NEWS
AABC Europe 2025 appendix data: Applicability of
Water Solvent Polyimide Binder for Si-system anode
2025/6/24
Serial Coating Trial and Charge-Discharge Evaluation of
SiO Electrodes Using Newly Developed Polyimide Binder
In roll-to-roll coating electrode, no occurrence of curling and electrodes with good coat ability were obtained.
Composition of SiO anode
| SiO (1400mAh/g) wt% |
Binder wt% |
AB wt% |
MWCNT wt% |
SWCNT wt% |
Basis Weight mAh/㎠ |
|---|---|---|---|---|---|
| 78.0 | 7.0 | 14.7 | 0.2 | 0.1 | 3.4 |
How to make Anode
Evaluation of 300mAh class cells using prototype electrodes
Heat treat roll-to-roll coating electrode at 150°C. Laminated cell is shown excellent high-rate discharge characteristics and cycle performance.
・Design of 300mAh laminated cell
Application demonstration using prototype electrodes
Implemented verification of roll-to-roll electrode performance applying electric toy. Visualize both voltage and current on working the application and find out advantage of newly polyimide binder.
Application：Plarail® ,which is electric train toy.
Cathode (Compared at SOC 100 after aging.)
| Binder | SiO wt% |
Binder wt% |
AB wt% |
MWCNT wt% |
SWCNT wt% |
Basis Weight mAh/㎠ |
Thickness µm |
|---|---|---|---|---|---|---|---|
| ① Water based PI |
78.0 | 7.0 | 14.7 | 0.2 | 0.1 | 3.2 | 68 |
| ② PAANa |
78.0 | 7.0 | 14.5 | 0.4 | 0.1 | 3.2 | 70 |
Left：Polyimide Binder Right：PAANa Binder
Evaluation of SiO electrode using U-Varnish-18D018:
Low-temperature performance
The composition of SiO and PI binder have confirmed for working well at -40 Celsius degree, 0.2CA. Graphite electrode which is using SBR-CMC could not work at low temperature.
