Abstract Ongoing research to develop a new generation of materials to achieve a more reliable and higher energy density lithium-ion batteries has attracted working groups attention worldwide in academia and industry. Products like lithium carbonate or lithium hydroxide are fundamental as the main feedstock for future materials. Recently, metal-atom substituted cathode materials with various metals has proved to improve the life-time, stability and performance of cathodes and consequently of the batteries. In this regard, this publication describes an approach to remove calcium impurities from industrial Lithium-rich brines with oxalic acid. Moreover, the present magnesium is reduced by the precipitation of magnesium hydroxide in a controlled manner in order to obtain a Lithium-enriched brine with a well-defined magnesium concentration in the absence of calcium. Finally, a process is presented to produce high purity lithium carbonate with controlled concentrations of magnesium between 1% to 3% as magnesium hydroxide. The magnesium hydroxide containing lithium carbonate is produced in a co-precipitation step, where initially the magnesium hydroxide is precipitated and subsequently the lithium carbonate is precipitated in a one-pot process.

中文翻译：

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从富锂卤水中制备含碳酸锂的氢氧化镁共沉淀工艺的开发

摘要 正在进行的开发新一代材料以实现更可靠和更高能量密度的锂离子电池的研究引起了全球学术界和工业界工作组的关注。碳酸锂或氢氧化锂等产品是未来材料的主要原料。最近，用各种金属代替金属原子的正极材料已被证明可以提高正极的寿命、稳定性和性能，从而提高电池的性能。在这方面，该出版物描述了一种用草酸从工业富锂盐水中去除钙杂质的方法。而且，本发明的镁通过以受控方式沉淀氢氧化镁而减少，以获得在不存在钙的情况下具有明确定义的镁浓度的富含锂的盐水。最后，提出了一种生产高纯度碳酸锂的方法，其中镁的浓度控制在 1% 到 3% 之间，作为氢氧化镁。含碳酸锂的氢氧化镁是在共沉淀步骤中生产的，其中首先沉淀氢氧化镁，随后在一锅法中沉淀碳酸锂。