1. Product Introduction
This product is a novel anode material for lithium-ion batteries, prepared from silicon oxide (SiO) through a carbon composite process. By optimizing the silicon‑oxygen composition and microstructure design, it delivers both high specific capacity and excellent cycling stability. It significantly enhances the energy density of lithium‑ion batteries while effectively reducing irreversible capacity loss during charge/discharge cycles.
Silicon Oxycarbide SiOC Anode Material
2. Key Advantages
High Specific Capacity – Far exceeding conventional graphite anodes, effectively boosting cell energy density.
High Initial Coulombic Efficiency – Pre‑lithiation or process optimization improves first‑cycle capacity and reduces irreversible loss.
Excellent Cycling Stability – The carbon composite structure effectively buffers volume expansion, extending cell cycle life.
Superior Processability – Uniform particle size distribution; no gas generation within 72 hours after slurry preparation; compatible with mainstream coating processes.
3. Applications
Suitable for cylindrical and pouch battery cell formats.
4. Technical Specifications
|
Parameter |
Unit |
Specification |
Test Method |
|---|---|---|---|
|
Moisture |
% |
≤ 0.5 |
Electronic Moisture Tester (DHS‑16A) |
|
Particle Size |
D10 |
3.5 ± 0.5 |
Malvern Laser Diffraction (Mastersizer 3000) |
|
|
D50 |
6.0 ± 1.0 |
|
|
|
D90 |
9.5 ± 1.5 |
|
|
Tap Density |
g/cm³ |
1.15 ± 0.15 |
Tap Density Tester (Bettersize BT‑301) |
|
Specific Surface Area |
m²/g |
1.5 ± 0.5 |
BET Surface Area Analyzer (ASAP 2460) |
|
Carbon Content |
% |
3.0 ± 1.0 |
Infrared Carbon/Sulfur Analyzer (HCS‑140) |
|
Reversible Capacity |
mAh/g |
≥ 1600 |
LAND Battery Test System (CT2001A) |
|
Initial Efficiency |
% |
≥ 75.0 |
|
5. SEM Images & Particle Size Distribution
SEM (×1,000) – Shows overall particle morphology and surface structure.
SEM (×5,000) – Reveals finer surface details of the carbon‑coated particles.
Particle Size Distribution – Demonstrates a narrow and well‑controlled D50 around 6.0 µm, suitable for consistent slurry coating.
6. Coin Cell Preparation & Testing Conditions
CR2032 Coin Cell Slurry Formulation (Recommended):
XYYG‑1 : Super P : CN1 Binder = 8 : 1 : 1 (by weight)
CR2032 Coin Cell Slurry Preparation (Recommended):
a) Weigh 339 g of CN1 binder and add to 1,161 g of ultrapure water. Stir at 600 rpm on an overhead stirrer for 300 min until the binder solution is uniformly dispersed.
b) Weigh 1.728 g of XYYG‑1 active material and 0.216 g of Super P into a mixing jar. Grind gently for 10 min.
c) Add 6.371 g of the prepared CN1 binder solution into the jar and seal.
d) Stir on a magnetic stirrer for 360 min to obtain the final slurry.
e) Coat the slurry onto copper foil, then dry the coated anode at 80°C under vacuum for 12 h.
CR2032 Coin Cell Testing Protocol (Recommended):
Rest for 6 h, then discharge at 0.1 C to 0.005 V;
Rest for 5 min, discharge at 0.02 C to 0.005 V;
Rest for 5 min, discharge at 1.0 C to 0.005 V;
Rest for 5 min, charge at 0.1 C to 1.5 V;
Rest for 5 min, jump to Step 2 and repeat for 3 cycles.
About Us
TRUNNANO is a leading supplier of high-performance battery materials for lithium-ion and sodium-ion batteries. Our portfolio includes nano cathodes, silicon-carbon anodes, hard carbon, and specialty additives. With strict quality control and consistent purity, we deliver reliable solutions for 3C electronics, power tools, and energy storage systems. Committed to innovation, TRUNNANO drives the future of energy storage with cutting-edge materials and dedicated customer support.
7. Packaging
The product must be packed in moisture‑proof bags, sealed, and then placed into cardboard cartons. Packaging weight can be customized according to customer requirements.
8. Transport & Storage
a) Handle with care during transportation to avoid damaging the packaging.
b) Do not use any product that has spilled due to damaged packaging, and do not return it to the container.
c) Store in a dry, well‑ventilated environment, and reseal promptly after each use.
FAQ
Q1: What is the difference between silicon oxycarbide (SiOC) and pure silicon or SiO anode materials?
A: SiOC incorporates a carbon matrix that better buffers the huge volume expansion of silicon during lithiation, offering improved cycling stability over pure silicon, while still providing much higher capacity than conventional graphite. Compared to SiO, the carbon composite structure further enhances electronic conductivity and structural integrity.
Q2: What is the recommended electrolyte for use with this material?
A: We recommend standard carbonate‑based electrolytes with typical additives (e.g., FEC, VC). For best results, please consult our technical team for case‑specific recommendations.
Q3: Does this material require pre‑lithiation?
A: Pre‑lithiation is recommended to maximize the initial coulombic efficiency, though our material already achieves ≥75% first‑cycle efficiency through process optimization. We can provide pre‑lithiated versions upon request.
Q4: What is the shelf life and storage condition?
A: When stored in sealed, moisture‑proof packaging in a dry and ventilated environment, the shelf life is 12 months. Always reseal the bag immediately after taking the required amount.
Q5: Can you provide custom particle size grades?
A: Yes, we can tailor the particle size distribution to meet specific customer requirements. Please contact our sales team for details.
Q6: What is the MOQ?
A: The MOQ is 1 kg for sample evaluation, with larger quantities available for bulk orders. Please contact us for pricing and lead time.
