LITHIUM-ION BATTERY

LITHIUM-ION BATTERY

APPLICATIONS OF UNION PROCESS MILLS FOR THE LITHIUM-ION BATTERY INDUSTRY Grinding Principle The Attritor is a high energy internally agitated media mill. The Attritor utilizes a rotating agitator shaft which efficiently imparts energy to the grinding media, creating kinematic porosity and random media movement throughout the entire grinding chamber. Both impact and shear forces are created in this “chaotic” state of motion. The grinding media and particles move randomly, colliding and impinging upon each other resulting in highly efficient grinding and/or thorough and complete dispersion. IRREGULAR MOVEMENT GROUP MOVEMENT Movement of media and particles Lithium Iron Battery applications utilize a 2 phase process: Phase 1 – Lithium Iron Phosphate Precursor Application (Wet or Dry): For both wet and/or dry milling applications in the lithium iron battery industry, the S-series Attritors are utilized in a 2-phase process. The first phase involves grinding and thoroughly dispersing coarse powder(s) down to the 1-3 um particle size range in an S-series mill from Union Process, Inc. Phase 1 processes can be either “wet” utilizing the S-series Attritor or “dry” utilizing the SD-series Attritor. Phase 2 – Lithium Iron Battery Finished Material Application (Wet): The DMQ series horizontal circulation mill is utilized in phase 2 for complete and thorough dispersion of agglomerated material to the primary particle size range of 200-300nm. Case Study S-Attritors to grind lithium iron phosphate precursor material: Material: Lithium iron phosphate precursor Feed size: D50=100µ End size: D50<2µ Grinding time: 1 hr Solvent: Alcohol Particle Size Analysis After Milling in S-Attritor DMQ-Mills to grind lithium iron phosphate precursor material: Particle Size Analysis After Milling in DMQ Mill From S-Attritor: Material: Lithium iron phosphate precursor Feed size: D50<2µ End size: D50<150nm Grinding time: 3 hrs Solvent: Alcohol Particle Size Percent % Percent % Particle Size

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