Fluidized-Bed CVD Coating Line Scale-Up Delivery, Silicon-Carbon Anode Client

Background

After completing fluidized-bed CVD (FBCVD) pilot validation for silicon-carbon anodes, a lithium-battery anode producer planned to scale up to mass production. Key requirements: keep coating uniformity and batch consistency, raise per-batch throughput, maintain uniform reaction temperature and meet safety and environmental requirements for silane-based process.

Specifications

Item	Value
Per-batch throughput	4x of pilot scale
Reaction type	Fluidized-bed chemical vapor deposition (CVD)
Reaction temperature	600-900 C
Fluidization gas	High-purity inert gas + silane/carbon source
Vessel material	Stainless steel + high-temperature lining
Temperature control	Zone control + online monitoring
Emission control	Off-gas scrubbing + dedusting + safety interlock

Solution

Delivered a mass-production fluidized-bed CVD reactor (stainless steel body, zone heating bands, conical distributor) with gas distribution, temperature control and off-gas treatment. Optimized distributor structure and gas flow ensure uniform fluidization; zone temperature control keeps reaction temperature stable; silane/carbon source is dosed on program for even particle coating. Safety interlocks and off-gas scrubbing meet silane-process safety and environmental requirements.

Milestones: scale-up design (month 1), fabrication (months 2-3), installation and leak test (month 4), fluidization and temperature commissioning (month 5), integrated trial run and acceptance (month 6).

Results

Indicator	Target	Actual
Per-batch throughput	4x pilot	Achieved
Coating uniformity	Batch consistent	Stable
First-cycle efficiency	Per client spec	Met
Cycling stability	Per client spec	Met
Integrated trial run	Passed first time	Passed

Customer feedback: coating uniformity and batch consistency maintained after scale-up; safety and environmental systems meet silane-process requirements, laying a foundation for further expansion.