锂离子吸附剂Li/Al LDH-Cl 的可控合成、结构与吸附机理研究

项目名称： 锂离子吸附剂Li/Al LDH-Cl 的可控合成、结构与吸附机理研究

项目编号： No.U1507114

项目类型： 联合基金项目

立项/批准年度： 2016

项目学科： 有机化学

项目作者： 李法强

作者单位： 中国科学院青海盐湖研究所

项目金额： 50万元

中文摘要： 基于低品位盐湖卤水锂资源提取技术存在瓶颈、预期未来盐湖锂资源贫矿提锂困难的现状，开展锂离子吸附剂——层状锂铝氢氧化物Li/Al LDH-Cl的可控合成研究及结构-吸附性能的理论研究与实验研究。首先研究无定型Al(OH)3与Li+自组装形成层状锂铝氢氧化物Li/Al LDH-Cl的规律，以指导可控合成条件的选择和优化；以理论计算数据和实验数据相结合的方法，采用原位TEM/XRD等原位技术，研究锂离子吸附剂Li/Al LDH-Cl化合物的晶体结构，获得该层状化合物中Li+所处的化学环境信息及Li+的嵌入阈能/脱嵌阈能。系统开展锂离子吸附剂Li/Al LDH-Cl的吸附/脱附性能研究，通过研究吸附/脱附热力学平衡状态和动力学行为规律，以及协同吸附和竞争吸附的规律，明确Li+在Li/Al LDH-Cl中嵌入/脱嵌规律，从理论上指导Li+在Li/AlLDH-Cl中吸附脱的行为控制。

中文关键词： 锂离子吸附剂；层状锂铝氢氧化物；可控合成；吸附机理；量化计算

英文摘要： Based on some bottlenecks of extraction lithium resource from low-grade lithiumbrine, and the difficult situation about extracting lithium from lean brineresource in the future, the project will study on a controlled synthesis and relationships of structure – adsorption performances of Lithium/Aluminum Chloride Layered Double Hydroxide (abbreviated as Li/Al LDH-Cl).Using In-situ TEM/XRD techniques, study on the formation law of Li/Al LDH-Cl by self-assembly from amorphous Al(OH)3 and LiCl, which would guide the controlled synthesis’s selection and optimization. The project will study on the microscopic crystal structure of Li/Al LDH-Cl which adsorbed or disadsorbed Li+ by a combined method of theoretical calculation and experimental data, to obtain the chemical environment information of Li+ and other coexistence ions as Al3+, OH- and Cl-,H2O in the layered compound, to obtain the embedded threshold energy and de-embedded threshold energy of Li+ in Li / Al LDH-Cl. The project will study on Li+ adsorption-desorption in Li/Al LDH-Cl, by researching the adsorption-desorption thermodynamic equilibrium and kinetic behavior, and by researching the law of cooperative adsorption and competitive adsorption, to obtain the law of Li+ adsorption-desorption in Li/Al LDH-Cl, wihich would guide the adsorbent-desorption behavior of Li+ in Li/Al LDH-Cl.

英文关键词： Lithium Ion Adsorbent;Li/Al LDH-Cl;Controllable Synthesis;Adsorption Mechanism;Quantization Calculation