Application of customized muffle furnace in lithium battery industry

In the lithium battery industry, customized muffle furnaces have become the core equipment for key processes such as positive electrode material synthesis, negative electrode material processing, solid electrolyte research and development, and waste battery recycling through precise temperature control, atmosphere adjustment, process optimization, and modular design, significantly improving material performance and production efficiency. The following is an analysis of specific application scenarios and technological advantages:

1. Positive electrode material synthesis: precise temperature control improves battery performance
Lithium iron phosphate (LFP) sintering
Requirement: LFP needs to be carbon coated at 700 ℃~800 ℃ to enhance the voltage plateau (up to 4.1V) and energy density (up to 15%).
Customized solution:
Temperature control: PID algorithm is used to control temperature fluctuations within ± 1 ℃, ensuring the uniformity of the carbon coating layer.
Atmosphere protection: A nitrogen environment is used to prevent LFP oxidation, and a rapid cooling system (water cooling+nitrogen purging) is used to shorten the process cycle.
Case: Zhengzhou Sereda Kiln Co., Ltd.’s 1400 ℃ laboratory muffle furnace has reduced LFP sintering time by 30% and improved product consistency by 20% through an intelligent temperature control system.
Sintering of ternary materials (NCM/NCA)
Requirement: NCM811 needs to be sintered at 1000 ℃, and the oxygen concentration needs to be precisely controlled between 5% and 20% to prevent cobalt ion reduction.
Customized solution:
Atmosphere mixing system: Integrated oxygen/nitrogen ratio regulating valve, real-time monitoring and feedback of gas concentration.
Multi zone temperature control: 1000 ℃ at the front end (main sintering zone) and 800 ℃ at the back end (slow cooling zone) to reduce the risk of material cracking.
Case: Customized equipment from a battery factory extended the cycle life of NCM811 by 200 times and reduced production costs by 12%.

2. Negative electrode material processing: nanostructure regulation enhances conductivity
Carbonization of graphite negative electrode
Requirement: Graphite needs to be carbonized at 1200 ℃~1500 ℃ to remove impurities, and the purity is required to be ≥ 99.9%.
Customized solution:
Microwave heating technology: achieves a heating rate of 20 ℃/min, shortens carbonization time by 80%, and reduces energy consumption by 30%.
Anti sticking design: Spray alumina coating on the inner wall of the furnace to reduce material adhesion and reduce cleaning costs by 50%.
Case: A negative electrode material company customized a microwave muffle furnace, which increased the efficiency of graphite negative electrodes to 95% for the first time.
Silicon based negative electrode composite
Requirement: Silicon carbon composite materials need to be heat treated at 800 ℃ to form a stable interface and prevent failure caused by volume expansion.
Customized solution:
Vacuum environment: Mechanical pump+molecular pump combined vacuum pumping (≤ 10 ⁻⁴ Pa) to avoid silicon oxidation.
Pressure loading: Integrated hydraulic system (pressure range 0~10MPa) to promote tight bonding between silicon and carbon.
Case: A research institute customized equipment to increase the cycle life of silicon-based negative electrodes by three times, with a capacity retention rate of over 80%.

3. Solid State Electrolyte Research and Development: High Temperature Uniformity Helps Breakthrough Ionic Conductivity
LLZO (Lithium Lanthanum Zirconium Oxide) Ceramic Sintering
Requirement: LLZO needs to be sintered at 1200 ℃ to obtain high ion conductivity (>10 ⁻⁴ S/cm), and strict control of lithium volatilization is required.
Customized solution:
Secondary combustion technology: promoting grain growth in the 1200 ℃ high-temperature zone, combined with lithium compensation devices (such as lithium foil coverage) to reduce volatilization.
Atmosphere circulation system: argon environment prevents oxidation, and tail gas treatment system recovers lithium vapor.
Case: A solid-state battery company customized equipment to increase LLZO ion conductivity by 50% and reduce costs by 40%.
Synthesis of Sulfide Electrolytes
Requirement: Sulfide electrolytes such as Li ∝ PS ₄ need to be pyrolyzed at 500 ℃~600 ℃, and moisture contact should be avoided to prevent failure.
Customized solution:
Glove box integration: The furnace body seamlessly connects with the glove box, enabling waterless operation throughout the entire process of raw material loading, pyrolysis, and sampling.
Rapid cooling: The liquid nitrogen cooling system increases the cooling rate to 100 ℃/min to prevent sulfide decomposition.
Case: A university customized equipment to improve the air stability of sulfide electrolytes by 10 times, meeting commercial needs.

4. Recycling of waste batteries: achieving resource recycling through high-temperature pyrolysis
Lithium ion battery recycling
Requirement: Waste batteries need to be pyrolyzed at 500 ℃~800 ℃ to separate valuable metals (such as cobalt and nickel) and remove organic matter.
Customized solution:
Secondary combustion technology: High temperature zone of 850 ℃~1200 ℃ ensures complete decomposition of dioxins and achieves harmless treatment.
Metal recycling system: Integrated screw conveyor and air lock valve to achieve continuous feeding, with a valuable metal recovery rate of over 95%.
Case: A recycling company customized a pyrolysis furnace to reduce processing costs by 60% and increase annual profits by 20 million yuan.
Solid state battery waste disposal
Requirement: Solid state battery waste needs to be pyrolyzed at high temperatures to remove sulfide electrolytes, as traditional equipment can easily lead to material cross contamination.
Customized solution:
Vacuum environment: Mechanical pump+molecular pump combined vacuum pumping (≤ 10 ⁻⁴ Pa) to prevent sulfide volatilization pollution.
Modular design: The furnace can be quickly replaced to meet the needs of different types of waste disposal.
Case: A battery manufacturer customized a vacuum furnace to increase the purity of waste treatment to 99.9%, meeting the requirements for new material synthesis.