无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (7): 38-44.doi: 10.19964/j.issn.1006-4990.2022-0616

• 研究与开发 • 上一篇    下一篇

铝钴共掺杂锂锰氧化物的制备及吸附提锂性能

韩红静1(), 张竞择2, 拉毛卓玛1, 韩吉者1, 吴勇民2, 汤卫平2   

  1. 1.青海大学新能源光伏产业研究中心,青海 西宁 810016
    2.上海空间电源研究所,上海 200245
  • 收稿日期:2022-10-17 出版日期:2023-07-10 发布日期:2023-07-13
  • 作者简介:韩红静(1986— ),女,博士,讲师,主要研究方向为盐湖提锂锂离子筛吸附剂制备及工艺研究;E-mail:winniehjhan@163.com
  • 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

HAN Hongjing1(), ZHANG Jingze2, LAMAO Zhuoma1, HAN Jizhe1, WU Yongmin2, TANG Weiping2   

  1. 1. New Energy(Photovoltaic) Industry Research Center,Qinghai University,Xining 810016,China
    2. State Key Laboratory of Space Power-sources Technology,Shanghai 200245,China
  • Received:2022-10-17 Published:2023-07-10 Online:2023-07-13

摘要:

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 x1.6Co 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(Mn0.9Al0.11.6Co0.05O4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。

关键词: 锂离子筛, Al-Co共掺杂, Li+吸附容量, 循环稳定性

Abstract:

Al-Co co-doped lithium ion sieves precursors Li1.6(Mn1-x Al x1.6Co 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(Mn0.9Al0.11.6Co0.05O4 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.

Key words: lithium ion sieve, Al-Co co-doped, Li+ adsorption capacity, cycling stability

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