铝钴共掺杂锂锰氧化物的制备及吸附提锂性能
收稿日期: 2022-10-17
网络出版日期: 2023-07-13
基金资助
青海自然科学基金项目(2019-ZJ-937Q);上海航天科技创新基金项目(SAST2017-139)
Preparation of Al-Co co-doped lithium manganese oxide and its adsorption performance of lithium
Received date: 2022-10-17
Online published: 2023-07-13
以电解二氧化锰和氯化锂为原料，掺杂少量氯化铝和氯化钴，采用水热工艺合成了Al-Co共掺杂锂离子筛前驱体Li1.6（Mn1-x Al x ）1.6Co y O4。经XRD、SEM、TEM表征及Li+吸脱附性能测试，研究了Al-Co共掺杂锂离子筛的晶相、形貌、元素分布及吸附提锂性能。结果表明：Al-Co共掺杂锂离子筛为尖晶石结构；具有纳米片多面体形貌且元素分布均匀；Li+溶液的初始质量浓度为100 mg/L时，H1.6（Mn0.9Al0.1）1.6Co0.05O4的Li+平衡吸附容量为38.53 mg/L，Li+吸附性能得到明显提升；5次循环吸脱附实验后，Li+吸附容量可保持为初始吸附容量的92%。综合分析可知，由于双元素的协同效应，Al-Co共掺杂可以使锂离子筛获得优异的吸附性能和循环稳定性。
韩红静 , 张竞择 , 拉毛卓玛 , 韩吉者 , 吴勇民 , 汤卫平 . 铝钴共掺杂锂锰氧化物的制备及吸附提锂性能[J]. 无机盐工业, 2023 , 55(7) : 38 -44 . DOI: 10.19964/j.issn.1006-4990.2022-0616
Al-Co co-doped lithium ion sieves precursors Li1.6（Mn1-x Al x ）1.6Co y O4 was synthesized by hydrothermal process using electrolytic manganese dioxide and lithium chloride as raw materials，doped with a small amount of aluminum chloride and cobalt chloride.The crystal phase，morphology，element distribution and lithium adsorption performance of Al-Co co-doped lithium ion sieves were studied by XRD，SEM，TEM and Li+ adsorption and desorption property test.The results showed that Al-Co co-doped lithium ion sieve had spinel structure.A nanosheet polyhedral morphology and a uniform element distribution was obtained for the specimen.When the initial concentration for Li+ solution was 100 mg/L，the Li+ equilibrium adsorption capacity for H1.6（Mn0.9Al0.1）1.6Co0.05O4 was 38.53 mg/L and the Li+ adsorption performance was significantly improved.After 5 cycles of adsorption and desorption experiments，the Li+ adsorption capacity could be maintained at 92% of the initial adsorption capacity.Therefore，due to the synergistic effect of the two elements，Al-Co co-doping could make lithium ion sieves obtain excellent adsorption performance and cycling stability.
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