Standard packaging: 5 pieces/pack (Single or double-sided coating).
Lithium manganese oxide positive electrode single-sided electrode
Single-sided coating main parameters:
| Item | Parameter |
| Electrode size | 241mm L * 200mm W |
| Coating area size | 241mm L * 175mm W (Leave 12.5mm of blank space at both ends) |
| Coating surface | Single-sided coating (rolled) |
| Total thickness |
70-90μm |
| Current collector thickness | 16μm |
| Coating surface density | 11.5 ± 0.2 mg/cm² |
| Current collector surface density | 4.22 mg/cm² |
| Active material mass ratio | 95.5% |
| Half-cell voltage platform | 3.0-4.3 V |
| Reference gram-to-gram capacity | 160mah/g (0.1c) |
| Compacted density |
3.0 ± 0.1 g/cm³ |
| Other matters | 1. The proportion of active substances in the electrode shall be based on the physical label. The calculation formula for active substances in the electrode is below (reference) 2. After opening the electrode, make sure to seal it and store it in a glove box or a 60℃ oven. |
First Electrode performance reference:
| No. | Test steps | Time | Voltage | Current | End Current | Start | Times |
| 1 | Hold | 240min | |||||
| 2 | Constant current and constant voltage charging | 4.3v | 0.1C | 0.02C | |||
| 3 | Hold | 5min | |||||
| 4 | Constant current discharge | 3.0v | 0.1C | ||||
| 5 | Hold | 5min | |||||
| 6 | Cycle | 2 | 1 | ||||
| tips | This process mainly tests the coulombic efficiency of the first cycle and the small current activation electrode, which lays the foundation for the electrode rate performance and cycle performance testing. | ||||||
Rate discharge performance test:
| No. | Test steps | Time | Voltage | Current | End Current | Start | Times |
| 1 | Hold | 5min | |||||
| 2 | Constant current and constant voltage charging | 4.3v | 0.5C | 0.02C | |||
| 3 | Hold | 5min | |||||
| 4 | Constant current discharge | 3.0v | 0.1C | ||||
| 5 | Hold | 5min | |||||
| 6 | Cycle | 2 | 1 | ||||
| tips | After the electrode is activated by 0.1C: Test rate setting: 0.50 constant current constant voltage charging.0.1C/0.5C/1C/3C discharge rate performance test process |
||||||
Cyclic performance test:
| No. | Test steps | Time | Voltage | Current | End Current | Start | Times |
| 1 | Hold | 5min | |||||
| 2 | Constant current and constant voltage charging | 4.3v | 0.5C | 0.02C | |||
| 3 | Hold | 5min | |||||
| 4 | Constant current discharge | 3.0v | 0.5C | ||||
| 5 | Hold | 5min | |||||
| 6 | Cycle | 2 | 50 | ||||
| tips | After the electrode is activated at 0.1C: Cycle performance setting reference | ||||||
The test electrolyte is:
Ratio: 1.0M LiPF6 in EC:DMC:EMC=1:1:1 Vol% with 1.0%VC
Reference for single-sided pole piece use:(Coin cell battery production reference)
- Electrode cutting: Electrode cutting machine. Recommended size of electrode sheet: diameter 12mm/14mm)
- Electrode weighing: balance
- Formula for calculating active substances: Active substance mass = (pole mass (mg)-disc area (cm²) * current collector surface density (mg/cm²)) * active substance ratio
- Electrode baking: vacuum drying oven
- Temperature: 60-80°C
- Time: 2-4 hours
- Electrode assembly: glove box, small hydraulic button battery sealing machine
- Recommended battery assembly sequence: negative electrode shell-sodium sheet-electrolyte-diaphragm-electrolyte-pole sheet-gasket-shrapnel-positive electrode shell
- Battery testing: 5V10mA8-channel battery tester
- Calculate the mass of active substances, input corresponding current size and voltage range.
- Current calculation: 0.1C=1C (active substance mass mg * 0.001 * nominal specific capacity mAh/g) * 0.1
Double-sided coating Main parameters:
| Item | Parameter |
| Electrode size | 241mm L * 200mm W |
| Coating area size | 241mm L * 175mm W (12.5mm left blank on both sides) |
| Coating surface | Double-sided coating |
| Substrate thickness | 16μm |
| Coating surface porosity | 23 ± 0. 4mg/cm² |
| Foil surface density | 4.22mg/cm² |
| Pressing density | 3.4 ± 0. 1g/cm³ |
| Active material mass ratio | 95.5% |
| All-electric reference specific capacity | 160 mAh/g |
| All-electric reference voltage platform | 3.0 – 4. 3V |
| Active material mass calculation | Coating surface density * Active material ratio * Pole size |
| Precautions | After opening the pole, please seal it for storage. It can be stored in a 60℃ oven or glove box. |
Double-sided pole piece soft package process reference
| Process flow | Reference parameters |
| Battery capacity setting | Capacity per gram * Area of a single piece * Density of coating surface * Ratio of active material |
| Pole piece punching | Punch positive and negative electrodes of fixed size |
| pole piece lamination | Stack the electrodes according to the designed number of layers |
| Hot Pressure and Micro Short Circuit Testing | Hot pressing time 2min Temperature 45℃ |
| Lug welding | Weld aluminum tabs to the positive electrode and nickel tabs to the negative electrode |
| Aluminum plastic film molding | Punch holes of appropriate depth and fixed size of aluminum-plastic film |
| Cell top and side seal | Pretreatment of soft-pack batteries |
| Battery core baking | Temperature 80℃, time 12 hours |
| Battery core injection | Inject a certain amount of electrolyte |
| Vacuum pre-sealing | Pre-seal the soft-pack batteries |
| Internal resistance test | Test battery voltage and internal resistance |
| Battery aging | Temperature 45℃, time 12 hours |
| battery formation | Small current formation |
| Battery aging test | Temperature 45℃, time 12 hours |
| Battery final seal | Extract gas from the battery and seal it in vacuum |
| Internal resistance test | Test voltage and internal resistance |
| Battery capacity division | Determine capacity |
Reviews
There are no reviews yet.