Materials Advances
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2025
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IF 4.7
Jialun Su,Qiyue Fan,Xiangting Hu,Yue Sun,Jie Lin,Jiayue Xu,Bingcai Pan,Zhenda Lu
The increasing demand for lithium-ion batteries in the electric vehicle market has intensified the demand for efficient lithium extraction from salt lake brine. This study presents a novel approach using silica-coated lithium manganese oxide (LMO) adsorbents embedded in millimeter-sized sodium alginate (SA) beads (LMO@SiO2/SA beads). By replacing expensive and environmentally detrimental tetraethyl orthosilicate (TEOS) with low-cost, eco-friendly sodium metasilicate (Na2SiO3), we have developed a more sustainable and cost-effective lithium extraction method. Continuous flow adsorption–desorption experiments demonstrated the excellent performance of the LMO@SiO2/SA beads, maintaining a lithium adsorption capacity of 6.22 mg g−1 and a consistent manganese dissolution ratio of 1.26% per cycle after 50 cycles. These results highlight the potential of this approach for large-scale lithium extraction from salt lakes, providing a sustainable and economical option to support the growing electric vehicle industry.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Energy Material Advances
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2022
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IF 0
Renjie He,Sheng Lei,Mengchuang Liu,Mingsheng Qin,Wei Zhong,Shijie Cheng,Jia Xie
Microspinel LiMn2O4 (LMO) is a widely used cathode material in power lithium-ion batteries. However, inevitable Mn dissolution and dynamic phase instability will cause the degradation of microspinel LMO during cycling. Here, a low-tortuosity LMO (LMO-LT) electrode is fabricated by an ice-templating method, which exhibits enhanced dynamic phase stability, alleviated Mn dissolution, and rare particle microcracks during cycling. It is shown that the low-tortuosity electrode enables fast lithium-ion diffusion and thus small concentration polarization, leading to uniform electrochemical reaction within microregions of the LMO-LT electrode. Furthermore, the fast lithium-ion transport kinetics and even mesoscopic scale reactions of the LMO-LT electrode effectively alleviate irreversible phase transition and Mn dissolution as well as suppress crack generation in LMO particles. As a result, the full cell [negative-to-positive capacity ratio (N/P) = 1.1] with thick LMO-LT cathode (13 mg cm−2) and Li4Ti5O12 anode sustains 80.0% capacity over 200 cycles. The LMO-LT electrode further delivers 78.9% capacity of that at 0.1 C at the high rate of 5 C. This work provides an important strategy to enhance dynamic phase stability and suppress Mn dissolution at the mesoscopic scale, promoting the development of high-performance LMO electrodes.
研究领域:
材料科学
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电化学
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DOI
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xiaoyu Zhao,Lixiao Zheng,Yongdan Hou,Yanfei Wang,Liang Zhu
Low-cost and highly efficient extraction of lithium from brine is the key to solving energy and environmental problems for sustainable development. The electrochemical lithium extraction method is of high selectivity , low energy consumption and environmental friendly. In this work, two innovations were proposed for electrochemical lithium extraction technology . Firstly, the layered Ti 3 C 2 -MXene was combined with a LiMn 2 O 4 (LMO) electrode to reduce the damage to the LMO crystal structure caused by manganese dissolution and the Jahn-Teller effect, and to greatly improve the lithium-ion transport rate and the cyclic stability of the electrode material . The good cyclic stability and high capacity were verified by XRD, SEM, and electrochemical tests before and after cycling. Secondly, the influence of four electric field controlling modes, namely constant current (CC) mode, pulse-rest(P10r2 and P10r10), pulse-rest-reverse pulse(P12r2R2), on the selectivity of lithium extraction was studied in simulated brine with an initial lithium/sodium ratio as low as 0.01. The results show that the Pulse Electric Field controlling method can effectively improve the lithium/sodium separation coefficient. Finally, an actual lithium extraction test was carried out in Atacama salt Lake brine with an initial Li/Na ratio of about 0.06. The Li/Na separation coefficient reached 1020 under the optimized electrode material structure and electric field mode. In conclusion, the application of LMO/MXene electrode under the pulse electric field mode is a highly selective method for lithium extraction with low initial lithium/sodium ratios.
研究领域:
电化学
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材料科学
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环境科学
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能源工程
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产品关联
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2021
·Vol. 69
·期 2
·289-300
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IF 1.967
Fu Liu,Weifang Zhu,Minmin Gou,Hengheng Cao,Ruili Guo
Two-dimensional flake Li 1.6 Mn 1.6 O 4 (LMO) was added to the Pebax®MH 1657 (Pebax) matrix to prepare mixed-matrix membranes (MMMs) for CO 2 /CH 4 mixed gas separation. The average pore diameter of the LMO nanosheet was about 10.79 nm: a fast CO 2 transport channel could be established in the membrane. In addition, the Li and oxygen defect site (O δ− ) in the LMO had an affinity for CO 2 , which improved the permeability of the membrane and the selectivity for CO 2 separation. Furthermore, the ultrathin structure of LMO with large aspect ratio was also conducive to gas separation. When the LMO filling amount was 2.0 wt%, the permeation rate of pure CO 2 gas of Pebax/LMO-2.0 membrane was 117.9 Barrer, and the CO 2 /CH 4 ideal selectivity was 18.74, which were 119.7 and 35.8% higher than Pebax membrane, respectively. The CO 2 /CH 4 mixed gas separation results of Pebax/LMO-2.0 membrane showed that the CO 2 permeability and CO 2 /CH 4 selectivity were 158.54 Barrer and 33.41, respectively, and were increased by 83.24 and 23.15%, compared with Pebax membrane.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Xiaoyu Zhao,Yaxin Gong,Kai Gao,Yanfei Wang,Hui Ying Yang
A composite electrode material, LiMn 2 O 4 -Pyr-2D, was designed by combining a 2D pyrazine-linked covalent organic framework (COF), namely Pyr-2D, with LiMn 2 O 4 (LMO). Pyridine (Pyr) was used to form a planar and conjugated structure, which enabled the formation of ordered and stable molecular building blocks with regular pores and uniform element distribution. This structural design effectively mitigated the rate of Mn dissolution and the Jahn-Teller effect-induced structural collapse of LMO at high temperatures, thereby significantly enhancing its resistance to elevated temperatures and improving the efficiency of lithium extraction from geothermal brine. Furthermore, the fast ion diffusion rate at high temperatures was utilized to improve the lithium extraction efficiency. The experimental results demonstrate that LiMn 2 O 4 -Pyr-2D exhibited an initial discharge capacity of 154.00 mAh/g in a LiCl solution at 60 ℃ and maintained a capacity retention rate of 92.52% after 20 cycles of lithium extraction in geothermal water from Tibet at 60 ℃. The unit energy consumption was 0.46 Wh/mol with an extraction capacity was 47.03 mmol/g. Overall, this approach introduces a novel and highly efficient method for electrochemically extracting lithium from high-temperature brine.
研究领域:
材料科学
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电化学
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能源材料
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
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IF 5.6
Jianguo Zhang,Chaochao Cao,Junke Cui,Chaoze Liu,Shaobo Yang,Zheng Zhou,Song Yan,Yanming Xue,Yongxin Qi,Chengchun Tang
Spherical boron nitride (BN) agglomerates with excellent liquidity and isotropy have great promise for enhancing their composite performances. However, the deficiency of poor structural strength and high-temperature fabrication approach are the current factors that limit this. Here, we report BN-LMO composite microspheres with isotropic properties and an average diameter of 69.04 μm achieved via a combined spray drying and low-temperature sintering (700 °C) approach, using lithium molybdate (Li 2 MoO 4 , LMO) as a low-melting-point binder. This route promotes liquid-phase assisted interfacial bonding between BN sheets, allowing the formation of structurally stable and mechanically robust composite microspheres while avoiding conventional high-temperature sintering. The resulting BN-LMO microspheres were uniformly dispersed in a PMMA matrix at 30 wt% loading with thermal conductivity of 0.9 W/(m·K) and glass transition temperature of 102.5 °C, which have increased by 373.7 % and 4.0 °C compared with pure PMMA, respectively. Besides, the composites also exhibit high compressive fracture strength of 123.3 MPa, and low dielectric loss of <0.041. Therefore, this exploration simultaneously achieves structural reinforcement and large-scale preparation of spherical BN agglomerates, offering potential opportunities for their wide applications in isotropic thermal management composites.
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产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
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2022
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IF 5.443
Hao Li,Liang Xue,Mingzhu Ni,Serguei V. Savilov,Sergey M. Aldoshin,Hui Xia
Spinel LiMn 2 O 4 (LMO) is a promising cathode material for lithium-ion batteries (LIBs) due to its low cost, high safety, and high energy density. However, surface dissolution of manganese and irreversible phase transitions reduce its long-term cycling performance. Although surface coating is a promising strategy for improving the structural stability of LMO, the commonly used coating process is tedious and complicated. In this work, a one-step sintering process is developed to prepare LMO materials coated in situ with MnBO 3 . It is found that the MnBO 3 layer formed in this way is uniformly coated on the surface of LMO, and effectively suppresses Mn dissolution and undesirable phase transition during repeated charge/discharge cycles. Furthermore, the MnBO 3 -coated LMO has improved electrode kinetics, demonstrating significantly improved rate performance compared to the pristine LMO. As a result, the optimized LMO sample exhibits 85.2% capacity retention after 1000 cycles at 1 C and still can deliver 96 mAh g −1 , even at 5 C. This work proposes a facile and efficient coating strategy for improving the electrochemical performance of LMO as a cathode material for LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
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IF 10.652
Yawen Cai,Yapeng Ma,Jinghua Feng,Mingyu Zhu,Xin Wang,Zhimin Lv,Ming Fang,Xiaoli Tan,Xiangke Wang
The efficient treatment of uranium (U) is an important and challenging issue regarding radioactive wastes management. Adsorbent with high efficacy, low-cost is urgently needed for alleviating the contamination of U-containing wastewaters. To solve these issues, we report a series of phytic acid (PA) modified Zn-Al-Ti layered mixed metal oxides (Zn-Al-Ti LMO@PAs) in this work, which shows the adsorption capacity as high as ∼1486 mg/g and could be easily obtained through a facile post-modification method. The adsorption performance of Zn-Al-Ti LMO@PAs for U(VI) are carefully estimated through batch experiments. With the aid of batch experiments and various characterization techniques, PA in Zn-Al-Ti LMO@PAs is found to make the most contribution for the chelation of U(VI), which favors for the adsorption selectivity and capability. The Zn-Al-Ti LMO@PAs are potential cost-effective adsorbents to remove the U(VI) in wastewaters.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
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