DESALINATION
·
2025
·
IF 9.8
Qibiao Chen,Chao Qian,Shaodong Zhou
Global demand for lithium necessitates efficient extraction technologies, especially from low-quality brines with high magnesium-to‑lithium (Mg/Li) ratios, where conventional methods falter. This study presents a novel, quantum chemistry-guided methodology for the rational design of solvent extraction systems to address this challenge. By evaluating lithium binding affinities, triisopropylphenyl phosphate (TiPPP) was identified as a superior extractant. When formulated into an TiPPP-FeCl 3 system, it demonstrated exceptional performance under optimized conditions (90 % vol extractant, Fe/Li molar ratio of 1.2, O/A ratio of 1). In a single stage, the system achieved a lithium extraction efficiency of 92.8 %, corresponding to a remarkable Li/Mg separation factor of 1699. After scrubbing and stripping, the Mg/Li mass ratio in the final product was reduced to 0.0199, a 4156-fold decrease from the initial brine (82.7), outperforming the conventional tributyl phosphate (TBP)-FeCl 3 system. A combination of DFT calculations and spectroscopic analyses (Infrared spectroscopy, Ultraviolet spectroscopy, Raman spectroscopy, and electrospray ionization mass spectrometry) confirmed that the high selectivity is governed by both the electronic environment of the phosphoryl (P=O) group and the steric hindrance effects. This study not only presents a high-performance system for direct lithium extraction but also establishes a rational design paradigm for developing advanced extractants for challenging separation tasks.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiaomi Tang,Kaiwei Yang,Zihao Zhang,Hong Chen,Xueqing Li,Guandan Lu,Yuelong Xu,Xiangjing Zhang,Xiaoyang Xu
Covalent organic frameworks (COFs), with customizable/functionalized skeleton and tunable/ordered channel structure, demonstrate high capability for rapid Li + intercalation/deintercalation to address the challenge of dynamic charge storage imbalance between battery-type anodes and capacitor-type cathodes in lithium-ion capacitors (LICs). Herein, we firstly synthesized hydrophenazine (HP)-linked COF HA-DQ powders with a pore size of 2.2 nm, featuring a fully conjugated crystalline D-A skeleton with enhanced local polarization. Further, the –Cl group with strong electronegativity was introduced into form COF HA-Cl to employ its synergistic interaction with active N sites for further inducing pronounced local polarization, which facilitates rapid Li + intercalation/deintercalation for ensuring accelerated anodic kinetics (simulated Li + diffusion energy barrier value of 0.018 eV in COF HA-Cl ). Then, following the COF HA-Cl anode prelithiated to 800 mAh g −1 , the constructed AC//COF HA-Cl LICs deliver the optimal capacity performance, such as a high energy density of 24.4 Wh kg −1 at a power density of 100 W kg −1 , and exhibited strong good cycling stability, maintaining 82.6 % of its initial capacity after 2000 cycles. This work addressed kinetic and capacity imbalance in LIC electrodes through molecular and pore structure design of COF materials, paving the way for future miniaturized and wearable electronics.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jianwen Xu,Menghan Zhu,Mingdao Zhang,Li Song,Yachao Jin
Lithium/Carbon Fluoride (Li/CF x ) primary batteries are widely regarded as one of the most promising electrochemical energy supply technologies in the military and medical fields due to their high energy density, low self-discharge rate, and good safety performance. However, Li/CF x batteries suffer from poor power density and severe voltage hysteresis, and solutions are often considered in terms of both cathode and electrolyte. In this work, an N,N-dimethylacetamide (DMA)-based electrolyte was designed to enhance the discharge platform of Li/CF x . The results show that DMA has a high dielectric constant and can effectively improve the ionic conductivity of the electrolyte as well as increase the solubility of lithium salts in the electrolyte. The optimized electrolyte was 1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) dissolved in DMA and PC (7:3 vol ratio). At 1C discharge rate, the specific capacity reached 726 mAh/g, the specific energy reached 1634 Wh/kg, and the voltage platform was raised to 2.32 V. The optimized electrolyte also demonstrates better discharge performance in pouch batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiafeng He,Hu Hong,Qi Feng,Xiaoke Wang,Xiliang Zhao,Minwei Xu,Xiang Wu,Hongfei Li,Chunyi Zhi,Cuiping Han
The urgent demand for high-energy and high-power energy storage devices initiates considerable interest for Li-O 2 batteries. Considering the catalytic reaction that happened on the cathode, the electrocatalyst plays a key role in deciding the performance of Li-O 2 batteries. Herein, a cobalt polyphthalocyanine with defective polymeric layered structure (D-CoPPc) is prepared by an annealing treatment. The macromolecular structure of D-CoPPc overcomes the dissolution of cobalt phthalocyanine (CoPc) therefore guarantying structural stability. Such a distinctive structure provides imperative features for Li-O 2 batteries involving the intrinsic high catalytic activity of CoPc unit, high conductivity given by π-π extended conjugated skeleton. Moreover, the introduced irregular structural defects are expected to promote the diffusion of oxygen. As a result, Li-O 2 battery with D-CoPPc as a catalyst achieves a high specific capacity of 4.0 mA h cm −2 at a current density of 50 μA cm −2 , a remarkable rate capability with the discharge voltage reached at 2.55 V at a current density of 500 μA cm −2 , and a superior cycling stability of more than 1000 h at 20 μA cm −2 . As such, the presented framework tailoring and defect engineering strategy open new avenues to regulate the catalytic activity for high-performance metal–oxygen batteries.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Haofan Wang,Zhifei Wu,Xu Zhang,Li Liu,Deqing Liu,Jin Ran,Dawei Zhang
Conventional polymer anion exchange membranes (AEMs) suffer from the permeability-selectivity trade-off in diffusion dialysis (DD), limiting their efficiency in critical resource recovery scenarios (e.g., acid recycling and Li + extraction). To overcome this, this study incorporated polyaniline-modified MXene (PANI-Ti 3 C 2 T X ) nanosheets as transformative fillers into quaternized polyphenylene oxide (QPPO). The resulting PANI-Ti 3 C 2 T X -QPPO membranes enable dual-function DD for H + /metal cations and Li + /Mg 2+ separation. First, the as-prepared membranes exhibited enhanced microphase separation, yielding expanded hydrophilic domains (13.95–14.8 nm vs. 12.5 nm in pristine QPPO). Moreover, the 1.0 %-PANI-Ti 3 C 2 T X -QPPO membrane (with 1.0 wt% filler loading) achieved a peak ion exchange capacity of 1.75 mmol g −1 . For H + /metal cations separation: in HCl/FeCl 2 mixture, the H + dialysis coefficient ( U H ) reached 1.39–1.50 × 10 −2 m h −1 (2.7–2.9 times higher than the commercial TWDDA3S, 0.52 × 10 −2 m h −1 ); in HCl/AlCl 3 mixture, U H reached 1.50–1.53 × 10 −2 m h −1 , combined with exceptional selectivity ( S H/Al = 1568.4–1805.8), outperforming both TWDDA3S ( U H = 0.94 × 10 −2 m h −1 , S H/Al = 1423.8) and pristine QPPO ( U H = 1.27 × 10 −2 m h −1 , S H/Al = 1117). Finally, for Li + /Mg 2+ separation, the membranes delivered enhanced Li + flux with competitive S Li/Mg (11.4–12.4) against TWDDA3S (11.4) and QPPO (11.8). This study demonstrates that PANI-Ti 3 C 2 T X and QPPO synergistically overcome the permeability-selectivity trade-off in polymer membranes.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qiao Li,Jiahui Yu,Shaowu Huang,Xuehua Liu,Chunfu Lin
Titanium niobates with shear ReO 3 crystal structures have emerged as promising candidates for environmental-friendly lithium-ion batteries due to their excellent low-temperature electrochemical performance. However, the underlying mechanism of this merit at low temperatures remains unclear. In this work, through in-situ powder X-ray diffraction examination, we identify that TiNb 2 O 7 and Ti 2 Nb 10 O 29 own negative thermal expansion (NTE) behavior along the b axis (−6.29 × 10 −7 K −1 for TiNb 2 O 7 and −4.8 × 10 −6 K −1 for Ti 2 Nb 10 O 29 ) for the first time, which significantly benefits their low-temperature performance. This NTE behavior in TiNb 2 O 7 //Ti 2 Nb 10 O 29 enables wider Li + diffusion channels and larger embedding sites at low temperatures, leading to good −10 °C performance with a high reversible capacity (78 %//84 % of that at 25 °C), rapid Li + diffusion (63 %//32 % of that at 25 °C), and good rate capability (1C vs. 0.1C retention of 70 %//64 %). In addition, the more open low-temperature crystal structure in TiNb 2 O 7 //Ti 2 Nb 10 O 2 reduces unit-cell-volume expansion during lithiation at low temperatures, enhancing the −10 °C cycling stability (101.3 %//93.9 % capacity retention after 1000 cycles at 10C). Therefore, TiNb 2 O 7 and Ti 2 Nb 10 O 29 are very suitable for low-temperature energy storage.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jun Wei,Xinyu Ma,Fengrui Yang,Shuwei Jia,Zhi Wang
Efficient separation of Mg 2+ /Li + is the key to extracting lithium resources from salt lakes. In this work, a symmetrical bis-quaternary ammonium salt (quaternized 1, 4-dimethylpiperazine, QDMPIP) monomer was synthesized and grafted to the surface of a polyamide nanofiltration membrane. By modulating the grafting amount of QDMPIP monomers, the membrane properties—including positive charge density, pore size, and hydrophilicity—were tailored. The surface of optimally QDMPIP-grafted membrane has a strong positive property, which can reduce Mg 2+ /Li + from 50 (feed) to 0.85 (permeate), and the corresponding S Mg2+/Li + reaches 58.5, which is 7.4 times that of the unmodified membrane. Remarkably, the flux remained comparable to the pristine membrane, while achieving a MgCl 2 rejection rate exceeding 93 % at 6000 ppm. In addition, the grafting of QDMPIP also improves the crosslinking degree of the membrane surface, which makes it have stable performance at complex operating pressures. Owing to its exceptional separation efficiency, high stability, and straightforward fabrication process, the QDMPIP-modified membrane demonstrates great industrialization potential in the extraction of lithium resources from salt lakes with a high Mg 2+ /Li + ratio.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zheyi Zhang,Qian Wei,Fen Jiao
The efficient recovery of fine-grained lepidolite remains a critical challenge in lithium resource extraction. This study proposes a flotation method leveraging mineral dissolution, focusing on the action mechanisms of Li⁺, Al³⁺, and Si⁴⁺ ions released from lepidolite and feldspar surfaces in alkaline environments. Flotation tests confirm that dissolved ions increase the flotation recovery of lepidolite from 45.24 % to 81.34 %. Inductively Coupled Plasma (ICP), Zeta potential, laser particle size measurement, and high-speed photography demonstrate that selectively released ions induce selective particle aggregation by regulating mineral surface potentials, thereby increasing the apparent particle size. Surface tension and foam property tests show that dissolved ions reduce the surface tension of the collector solution, optimize foam stability, and enhance mineralization efficiency. This study elucidates the pivotal role of dissolved ions in fine-grained lepidolite flotation and provides new insights into interface regulation strategies for the flotation of fine silicate minerals.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lanhua Ma,Jiwei Zhao,Mengjie Li,Hai Su,Yong Li,Yuansheng Liu,Hang Liu,Ewa Zygadło-Monikowska,Yunhua Xu
Quasi-solid electrolytes are poised to revolutionize the next generation of high-energy-density lithium metal batteries. However, they face considerable challenges in operating at high temperatures due to severe side reactions, particularly with high-voltage cathodes. Here, we fabricated a nonflammable quasi-solid electrolyte (QSE) using an in situ copolymerization method. This electrolyte features a copolymer host with both flexible branches and a rigid skeleton, along with fire-retardant fluorine- and phosphorus-based plasticizers. The flexible branches reduce crystallinity and facilitate lithium-ion migration, while the rigid skeleton provides excellent high-temperature stability. The optimized fluorine–phosphorus mixed plasticizer provides effective sequestration of highly reactive oxygen/hydroxide radicals, along with a wide electrochemical window (up to 4.7 V vs Li+/Li), thereby ensuring excellent interface stability and safety characteristics. Consequently, the resulting quasi-solid electrolyte demonstrates remarkable physicochemical and electrochemical properties, enabling highly reversible lithium plating-stripping processes and good compatibility with cathodes. Using the nonflammable QSE, a high capacity retention of 82.3% is achieved for LiFePO4 after 1000 cycles at a high current density of 5 C and 80 °C. The good compatibility with high-voltage cathodes was demonstrated by the stable cycling of LiCoO2 over 400 cycles at a high cutoff voltage of 4.5 V and an elevated temperature of 60 °C.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Shengzeng Lin,Zhen Wang,Tianxing Lu,Haojie Wang,Pei Li,Fang Yang,Zhimeng Guo
The electrochemical properties and microstructure of Li-rich cathode materials Li 1.2 Mn 0.54 Co 0.13 Ni 0.13 O 2 synthesized in one-step were studied. The sample (s-g) was composed of single crystal particles (1–2 μm) with regular and smooth surface, and the particle size distribution was concentrated. Compared with the sample (cop) prepared by traditional coprecipitation method, the discharge specific capacity of sample s-g increased from 79.9 mAh g −1 to 114.5 mAh g −1 at 10C. After 100 cycles at the rate of 0.1C and 0.2C, the capacity retention rates of sample s-g were 99.48% and 105.36%, while those of sample cop were 66.23% and 71.55%, respectively. Homogeneous single crystal structure and good grain size control greatly released the capacity potential of Li-rich cathode materials and solved the problem of poor rate performance and fast capacity decay.
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 30
·21799-21807
·
IF 3.9
Yijin Sheng,Fangxu Hu,Yu Wu,De Li,Wenting Ji,Yong Chen
The electrochemical oscillation in Li-ion batteries has been reported for two-phase electrode materials of Li4Ti5O12 and LiCrTiO4, which is originated from the group-by-group phase transition in a multi-particle electrode. For both Li4Ti5O12 and LiCrTiO4, the electrochemical oscillation exhibits usually during charging, while rarely for discharging. Herein, a series of Zr-modified Li4Ti5O12 samples are prepared by using the spray-drying combined with high-temperature sintering method, and the electrochemical oscillation is observed during not only the charging process, but also the discharging process, which gradually grows up and then disappears by increasing the Li content. Compared with Li4Ti5O12, the specific capacity of Zr-modified Li4Ti5O12 decreases gradually by increasing the Zr/Ti ratio, owing to the impurity phases. According to the XRD, XPS and STEM results, the Zr element tends to accumulate on the surface to form ZrO2 nanoparticles, rather than dope into the bulk phase of Li4Ti5O12, which makes Li4Ti5O12 particles well dispersive. In contrast to the Li deficiency for only charging, the electrochemical oscillation during both charging and discharging should be attributed to the Li excess, but too much Li2TiO3 phase will suppress the electrochemical oscillation. Therefore, the Li excess can induce the electrochemical oscillation during both charging and discharging of Zr-modified Li4Ti5O12, which can be adopted to investigate the electrochemical oscillation of other materials in LIBs.
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高影响因子
DESALINATION
·
2020
·
IF 7.098
Chengyi Zhang,Yingxin Mu,Song Zhao,Wen Zhang,Yuxin Wang
Lithium extraction from brines with the high Mg 2+ /Li + ratio is crucial for sustainable lithium resource and environmental protection. This study incorporated the classic tributylphosphate (TBP)/FeCl 3 system into the polyvinyl chloride (PVC) based polymer inclusion membrane (PIM) to extract Li + from the solution which is rich of Mg 2+ (The initial Mg 2+ /Li + molar ratio is 15). The morphology and composition of PIMs were characterized systematically, and the content of TBP/FeCl 3 carrier in the PIM was optimized. Compared to liquid-liquid extraction, the extraction ratio of Li + for PIM extraction increases by 20% and the separation factor of Li + over Mg 2+ increases by 5%. Besides, the loss ratio of Fe 3+ after one loop of liquid-liquid extraction is 17.79%, which is close to that of PIM extraction after three loops (18.30%), demonstrating that the PIM showed a good stability. Furthermore, the separation factor of Li + over Mg 2+ for the PIM with 50 wt% TBP/FeCl 3 is as high as 176 and the initial flux for Li + is 8.12 × 10 −4 mol m −2 h −1 . This study displays a TBP/FeCl 3 based PIM with high selectivity for Li + , providing a possible membrane technology for lithium extraction from brines.
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高影响因子
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