Material: Lithium iron phosphate + conductive agent Feed size: D50=2-3µ End size: D50<200nm Processing time: 0.5 hr Solvent: NMP SEM (1µ) of lithium iron phosphate after processing for 0.5 hr SEM (0.5µ) of lithium iron phosphate after processing for 0.5 hr DMQ-Mill TM Horizontal Circulation Mixes and Disperses Finished Battery Material: Figures 1 and 2 display consistency and repeatability of milling results from the S-Attritor. The D50 is within the 5% range, and the D99 is within the 10% range. Note: with an increase in grinding time, the degree of repeatability is increased as well. Union Process, Inc., mills can produce fast, efficient, and repeatable results for the lithium iron battery industry. Repetitive comparison of grinding tests for lithium iron phosphate precursor: Grinding 15 min. Particle Size (µ) Figure 1 Test 1 Test 2 Test 3 Particle Size (µ) Test 1 Test 2 Test 3 Grinding 45 min. Figure 2 1925 Akron-Peninsula Road, Akron, Ohio 44313-4896 Phone: (330) 929-3333 • Fax: (330) 929-3034 firstname.lastname@example.org • www.unionprocess.com © 2011, Union Process, Inc. All rights reserved. For information about Union Process Mills that can be used in Lithium Iron Battery applications, please see: www.unionprocess.com/wet_prod.html (wet grinding) www.unionprocess.com/dry_prod.html (dry grinding) www.unionprocess.com/dmq_mill.html (small media or bead milling) S-Attritor Features (Wet) • Adaptability: Premixing is not necessary when processing multiple components. The S-Attritor can process slurries with a maximum viscosity of up to 30,000. • Circulation pump: Circulation during processing improves grinding efficiency and achieves uniform distribution of the slurry. • Variable speed system: Variable mill speed allows versatility to optimize processing conditions. DMQ-Mill TM Features (Small Media or Bead Milling) • High energy density: Patented design of Delta disks create forced centrifugal grinding inside the mill; the speed is higher than 15 m/sec. • Narrow particle size distribution: The mill tank is filled with small media and operated at a very high circulation rate. Produces very narrow particle size distribution of the processed material. • Super fine grinding media are used: As fine as 0.1-1 mm media can be used in the mill. Final products from the mill can be as fine as D100<100nm. S-series SD-series DMQ-series SD-Attritor Features (Dry) • Variable speed system: Variable frequency drive allows versatility to optimize processing conditions. • Powders are easily added through top of mill and discharged through a grid at bottom of mill. • Allows for grinding under inert gases or the introduction of liquid nitrogen for cooling.
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