High Voltage 4.5V Lithium Cobalt Oxide Cathode Material for High Energy Density Batteries
Our 4.5V High-Voltage LCO series utilizes advanced surface coating and cation doping technologies to stabilize the crystal structure under high-potential charging. Unlike conventional LCO, this material prevents structural degradation at 4.5V, allowing for a breakthrough in volumetric energy density—essential for modern, slim electronic designs.
| Property | Specification |
| Cut-off Voltage | 4.5V (vs. Li/Li+) |
| 1st Discharge Capacity (0.1C) | ≥ 185 – 190 mAh/g |
| 1st Efficiency | ≥ 95% |
| D50 Particle Size | 15.0 – 18.0 μm |
| Tap Density | ≥ 2.8 g/cm³ |
| Moisture Content | ≤ 0.03% |
| ltem | Unit | Standard | Typical | |
|---|---|---|---|---|
| Chemical composition ChemioaCompositions | Li | % | 7.00±0.40 | 7.04 |
| Co | % | 59.00±0.7 | 59.00 | |
| ImpuritiesImpurity | Fe | ppm | ≤50.0 | 14 |
| Ni | ppm | ≤50.0 | 3 | |
| Na | ppm | ≤200.0 | 84 | |
| Cu | ppm | ≤50.0 | 1 | |
| Particle size distribution Particle SizeDistribution | D10 | μm | ≥3.5 | 5.06 |
| D50 | μm | 16.5±2.0 | 16.55 | |
| D90 | μm | ≤40.0 | 30.40 | |
| D99 | μm | ≤55.0 | 42.20 | |
| PH | / | 10.00±0.5 | 9.97 | |
| Li impurities | Li₂CO₃ | % | ≤0.025 | 0.010 |
| LiOH | % | ≤0.015 | 0.002 | |
| Moisture | ppm | ≤200 | 80 | |
| Specific surface areaSpecific Surface Area | m²/g | 0.15±0.06 | 0.14 | |
| Tap densityTap Density | g/cm³ | ≥2.60 | 3.03 | |
| Magnetic materialsMagnetic substance | ppb | ≤200 | 76 | |
| First discharge capacity1"Discharge Capacity | mAh/g | ≥192.5 | 194.0 | |
| First efficiency1#efficiency | % | ≥92.00 | 93.2 | |
Key Performance Benefits
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High Energy Ceiling: Extends the usable capacity of lithium-ion cells by pushing the voltage limit safely.
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Structural Integrity: Minimized cobalt dissolution and phase transition issues during high-voltage cycling.
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Excellent Rate Capability: Optimized particle morphology ensures fast lithium-ion diffusion.
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Consistency: Strict batch-to-batch control for magnetic impurities and pH levels.
Applications
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Smartphones & Tablets: Maximizing battery life in limited internal spaces.
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UAVs / Drones: Providing the high power and high capacity needed for extended flight times.
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Premium Wearables: Reliable performance for compact, high-end consumer tech.
Frequently Asked Questions (FAQ) – KY-LCO 4.5V
Q1: What is the main advantage of 4.5V LCO compared to standard 4.2V or 4.35V LCO?
A: The primary advantage is a significant increase in volumetric energy density. By increasing the charging cut-off voltage to 4.5V, the lithium-ion extraction depth is deeper, resulting in a higher discharge capacity (up to 185-190 mAh/g). This allows battery manufacturers to create smaller, thinner batteries with longer runtimes for high-end smartphones and UAVs.
Q2: How does your 4.5V LCO maintain structural stability at such high voltage?
A: Our KY-series 4.5V LCO utilizes advanced surface coating (such as Al2O3 or metal phosphates) and multi-element cation doping. These treatments stabilize the crystal lattice and suppress the phase transition from the O3 to H1-3 phase, effectively preventing oxygen release and cobalt dissolution during high-potential cycles.
Q3: What are the recommended electrolyte requirements for 4.5V LCO systems?
A: To fully leverage the performance of 4.5V LCO, we recommend using a high-voltage stable electrolyte. This typically includes functional additives (like PS, LiPO2F2, or nitrile additives) that form a robust CEI (Cathode Electrolyte Interphase) layer, preventing electrolyte decomposition at potentials above 4.4V.
Q4: Is this 4.5V LCO compatible with existing battery manufacturing processes?
A: Yes. Our LCO powder is designed with a optimized particle size distribution (D50: 15-18 μm) and high tap density. It offers excellent processing performance, ensuring easy slurry preparation, uniform electrode coating, and high compaction density during the calendering process.
Q5: What is the typical cycle life performance of KY-LCO at 4.5V?
A: Under controlled testing conditions (full cell, 0.5C/1C cycle), our 4.5V LCO can maintain over 80% capacity retention after 500+ cycles, provided it is paired with a compatible anode and optimized high-voltage electrolyte.
