Lithium carbonate (Li_(2)CO_(3)) was synthesised by adding sodium (Na) and magnesium (Mg) ions into a lithium chloride solution at different concentrations,followed by the addition of an appropriate sodium carbonate s...Lithium carbonate (Li_(2)CO_(3)) was synthesised by adding sodium (Na) and magnesium (Mg) ions into a lithium chloride solution at different concentrations,followed by the addition of an appropriate sodium carbonate solution.Then,the morphology,purity and particle size of Li_(2)CO_(3) crystals were investigated.The Na and Mg ions had negligible and remarkable effects,respectively,on the product purity;however they both greatly influenced its morphology.Their effects on the nucleation and growth rates,the radial distribution function and the diffusion behaviour of the synthesised Li_(2)CO_(3) were investigated via molecular dynamics methods;the Na ions slowed down the crystal nucleation and growth rates,while the Mg ions accelerated them.Moreover,the Mg ions rendered the system short-range ordered and long-range disordered and also increased the diffusion coefficient.The results of this study showed that Mg ions are one of the most important factors influencing the purity and yield of Li_(2)CO_(3).展开更多
基金Funded by the 2017 CAS“Light of West China”Program,Innovation Academy for Green Manufacture,CAS(No.IAGM2020C01)Key R&D and Transformation Projects in Qinghai Province(No.2019-GX-167)。
文摘Lithium carbonate (Li_(2)CO_(3)) was synthesised by adding sodium (Na) and magnesium (Mg) ions into a lithium chloride solution at different concentrations,followed by the addition of an appropriate sodium carbonate solution.Then,the morphology,purity and particle size of Li_(2)CO_(3) crystals were investigated.The Na and Mg ions had negligible and remarkable effects,respectively,on the product purity;however they both greatly influenced its morphology.Their effects on the nucleation and growth rates,the radial distribution function and the diffusion behaviour of the synthesised Li_(2)CO_(3) were investigated via molecular dynamics methods;the Na ions slowed down the crystal nucleation and growth rates,while the Mg ions accelerated them.Moreover,the Mg ions rendered the system short-range ordered and long-range disordered and also increased the diffusion coefficient.The results of this study showed that Mg ions are one of the most important factors influencing the purity and yield of Li_(2)CO_(3).
