Construction of porous disc-like lithium manganate for rapid and selective electrochemical lithium extraction from brine

doi:10.1016/j.cjche.2022.05.026

Chinese Journal of Chemical Engineering ›› 2023, Vol. 54 ›› Issue (2): 316-322.DOI: 10.1016/j.cjche.2022.05.026

Construction of porous disc-like lithium manganate for rapid and selective electrochemical lithium extraction from brine

Guolang Zhou¹, Xiaowei Li¹, Linlin Chen¹, Guiling Luo¹, Jun Gu¹, Jie Zhu¹, Jiangtao Yu¹, Jingzhou Yin⁴, Yanhong Chao^2,3, Wenshuai Zhu^1,2

1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;
2. College of Chemical Engineering and Environment, State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China;
3. School of Pharmacy, Jiangsu University, Zhenjiang 212013, China;
4. School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223001, China

Received:2021-12-24 Revised:2022-05-07 Online:2023-05-11 Published:2023-02-28
Contact: Linlin Chen,E-mail:chenllujs@ujs.edu.cn;Yanhong Chao,E-mail:chaoyh@ujs.edu.cn;Wenshuai Zhu,E-mail:zhuws@ujs.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (21878133, 21908082, 22178154), the Natural Science Foundation of Jiangsu Province (BK20190854), the China Postdoctoral Science Foundation (2020 M671364, 2021 M701472), and the Science & Technology Foundation of Zhenjiang (GY2020027).

Construction of porous disc-like lithium manganate for rapid and selective electrochemical lithium extraction from brine

Guolang Zhou¹, Xiaowei Li¹, Linlin Chen¹, Guiling Luo¹, Jun Gu¹, Jie Zhu¹, Jiangtao Yu¹, Jingzhou Yin⁴, Yanhong Chao^2,3, Wenshuai Zhu^1,2

1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China;
2. College of Chemical Engineering and Environment, State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China;
3. School of Pharmacy, Jiangsu University, Zhenjiang 212013, China;
4. School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223001, China

通讯作者: Linlin Chen,E-mail:chenllujs@ujs.edu.cn;Yanhong Chao,E-mail:chaoyh@ujs.edu.cn;Wenshuai Zhu,E-mail:zhuws@ujs.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (21878133, 21908082, 22178154), the Natural Science Foundation of Jiangsu Province (BK20190854), the China Postdoctoral Science Foundation (2020 M671364, 2021 M701472), and the Science & Technology Foundation of Zhenjiang (GY2020027).

Abstract

Abstract: In order to satisfy the growing global demand for lithium, selective extraction of lithium from brine has attracted extensive attention. LiMn₂O₄-based electrochemical lithium recovery system is one of the best choices for commercial applications because of its high selectivity and low energy consumption. However, the low ion diffusion coefficient of lithium manganate limits the further development of electrochemical lithium recovery system. In this work, a novel porous disc-like LiMn₂O₄ was successfully synthesized for the first time via two-step annealing manganese (II) precursors. The as-prepared LiMn₂O₄ exhibits porous disc-like morphology, excellent crystallinity, high Li⁺ diffusion coefficient (average 7.6×10^-9 cm²·s^-1), high cycle stability (after 30 uninterrupted extraction and release cycles, the crystal structure hardly changed) and superior rate capacity (93.5% retention from 10-120 mA·g^-¹). The porous structure and disc-like morphology further promote the contact between lithium ions and electrode materials. Therefore, the assembled electrochemical lithium extraction device with LiMn₂O₄ as positive electrode and silver as negative electrode can realize the rapid and selective extraction of lithium in simulated brine (adsorption capacity of lithium can reach 4.85 mg·g^-1 in 1 h). The mechanism of disc-like LiMn₂O₄ in electrochemical lithium extraction was proposed based on the analysis of electrochemical characterization and quasi in situ XRD. This novel structure may further promote the practical application of electrochemical lithium extraction from brine.

Key words: LiMn₂O₄, Desalination, Diffusion coefficient, Electrochemistry, Brine, Selectivity

摘要： In order to satisfy the growing global demand for lithium, selective extraction of lithium from brine has attracted extensive attention. LiMn₂O₄-based electrochemical lithium recovery system is one of the best choices for commercial applications because of its high selectivity and low energy consumption. However, the low ion diffusion coefficient of lithium manganate limits the further development of electrochemical lithium recovery system. In this work, a novel porous disc-like LiMn₂O₄ was successfully synthesized for the first time via two-step annealing manganese (II) precursors. The as-prepared LiMn₂O₄ exhibits porous disc-like morphology, excellent crystallinity, high Li⁺ diffusion coefficient (average 7.6×10^-9 cm²·s^-1), high cycle stability (after 30 uninterrupted extraction and release cycles, the crystal structure hardly changed) and superior rate capacity (93.5% retention from 10-120 mA·g^-¹). The porous structure and disc-like morphology further promote the contact between lithium ions and electrode materials. Therefore, the assembled electrochemical lithium extraction device with LiMn₂O₄ as positive electrode and silver as negative electrode can realize the rapid and selective extraction of lithium in simulated brine (adsorption capacity of lithium can reach 4.85 mg·g^-1 in 1 h). The mechanism of disc-like LiMn₂O₄ in electrochemical lithium extraction was proposed based on the analysis of electrochemical characterization and quasi in situ XRD. This novel structure may further promote the practical application of electrochemical lithium extraction from brine.

关键词: LiMn₂O₄, Desalination, Diffusion coefficient, Electrochemistry, Brine, Selectivity

Guolang Zhou, Xiaowei Li, Linlin Chen, Guiling Luo, Jun Gu, Jie Zhu, Jiangtao Yu, Jingzhou Yin, Yanhong Chao, Wenshuai Zhu. Construction of porous disc-like lithium manganate for rapid and selective electrochemical lithium extraction from brine[J]. Chinese Journal of Chemical Engineering, 2023, 54(2): 316-322.

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Construction of porous disc-like lithium manganate for rapid and selective electrochemical lithium extraction from brine

Construction of porous disc-like lithium manganate for rapid and selective electrochemical lithium extraction from brine

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