Preparation of Octahedral Mn₃O₄ by Liquid Phase Method

Abstract

Octahedral manganese trioxide was prepared from manganese sulfate solution with air as oxidant and compound additive as pH regulator. The results showed that the product had high crystallinity, stable baseline and significant diffraction peak. The micro morphology was formed by stacking regular octahedral structure, the particle size was uniform, and it was about 200nm, the pores were rich, the specific surface area was 6.5 m2/g, and the tap density was 2.11g/cm3. All performance indexes of the product met the excellent standard of soft ferrite manganese trioxide (GBT21836-2008).

Study on the Adsorption Mechanism of Cobalt and Nickel in Manganese Sulfate by δ-MnO2

“…Manganese sulfate is the most important and basic manganese source material for cathode materials of manganese-based power lithium batteries. So it is necessary to remove impurities in the manganese sulfate solution to obtain high-purity manganese sulfate products. , The common impurity removal methods include the sulfide precipitation method, − fluorination method, − carbonation method, , extraction method, and crystallization method. , There are many shortcomings such as the long procedure, many control nodes, high requirements, high cost, large amount of slag, and low efficiency in the above processes. Therefore, developing an effective, short process with low environmental harm, low cost, and low slag removal has become a research hotspot in manganese sulfate production.…”