SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qing Liu,Huifang Xing,Yan Zhang,Yunze Zhao,Meng Rong,Huizhou Liu,Liangrong Yang
The metatitanic acid H 2 TiO 3 (HTO) with high selectivity shows potential in lithium extraction from salt lake brine. Nevertheless, the sluggish adsorption kinetics and unsatisfying actual adsorption capacity hinder H 2 TiO 3 industrial application. Herein, a rare earth element Nd-doped H 2 TiO 3 (Nd-HTO-1 %) was synthesized. The crystallinity, morphology, hydrophilicity, adsorption property and mechanism of Nd-HTO-1 % were systematically characterized by a series of techniques. Interestingly, Nd-doping promotes the generation of oxygen vacancies, thereby increasing the density of surface hydroxyl groups and making the surface high-hydrophilic and particle size decreased. After 1 % Nd-doping, high-hydrophilic HTO was obtained with a contact angle of 16.5°. The adsorption capacity of Nd-HTO-1 % increased by 12.5 % compared with HTO, and the equilibrium time of adsorption reduced by half to 4 h. After eight cycles, Nd-HTO-1 % still showed a considerable adsorption capacity of 39.69 mg·g −1 . In the meantime, the dissolution loss of titanium is merely 0.14 %, showing excellent cycling stability. Combined with the considerable selectivity exhibiting in Qarhan salt lake brine, it demonstrates potential in utilization of Nd-doped H 2 TiO 3 for lithium extraction from salt lake brine.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ping Li,Yuan Zhou,Chunxi Hai,Yu Tang,Ying Cheng,Yanxia Sun,Shengde Dong,Luxiang Ma,Xin He,Qi Xu
As a promising technology for lithium extraction from salt lakes, nanofiltration membranes still face challenges in balancing between permeability and selectivity. In this paper, highly dispersed functionalized boron nitride nanosheets (BNNSs-NH 2 ) were prepared by modifying exfoliated boron nitride nanosheets (BNNSs) with polydopamine, which were incorporated into a polyamide (PA) layer by aqueous phase conditioning to prepare positively charged polyamide nanofiltration membranes. Scanning electron microscopy (SEM) showed that the PDA nanoclusters on the surface of the BNNSs can disrupt the regular stacking parallel to the membrane surface. Energy spectrum (EDS) of SEM and X-ray photoelectron spectroscopy (XPS) etching further revealed that BNNSs-NH 2 were dispersed within PA layer, creating transmembrane channels for molecular diffusion. The results showed a pure water permeance of 8.55 ± 0.24 L/m 2 h bar, indicating that the stabilized intercalation of BNNSs-NH 2 in the PA layer synergistically improved the water permeability. Meanwhile, the retention rate of MgCl 2 remained at 94 %, which was attributed to the enhanced compatibility between BNNSs-NH 2 and polyamide matrix by the polydopamine coating (PDA) on the surface, as well as the Dornan effect repulsion by the enhanced positive charge on the membrane surface. After the three-stage nanofiltration of membrane, the Mg 2+ /Li + ratio decreased from 50 to 0.12. Overall, this method balances permeability and selectivity by adjusting pore size and positive charge, potentially offering new ideas and insights for the preparation and development of nanofiltration membranes for Mg 2+ /Li + separation.
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Small
·
2024
·
IF 13
Yuying Liu,Tao Huang,Zhencheng Huang,Weiyuan Huang,Jing Chen,Hao Jia,Xuanlong He,Weibin Chen,Haoran Wei,Liewu Li,Xiangzhong Ren,Xiaoping Ouyang,Jianhong Liu,Shenghua Ye,Xuming Yang,Feng Pan,Qianling Zhang,Jiangtao Hu
The practical application of lithium metal batteries (LMBs) is largely hindered by the notorious lithium dendrite growth, low cycle efficiency associated with insufficient electrode–electrolyte interphase dynamics, and electrolyte combustion. Here, an advanced electrolyte using a combination of three kinds of salts dissolved in carbonate-based solvents is developed. The salt anions dominate a primary solvation sheath, resulting in weak interaction between Li + and the solvents, as well as the in situ formation of an inorganic-rich bilayer solid electrolyte interface (SEI). The designed electrolyte enables high cycle stability in LMBs with a high-loading NMC cathode (approximately 20 mg cm −2 ), exhibiting 89.89% capacity retention after 200 cycles with the cutoff voltage of 4.5 V. Cryo-TEM characterization and density-functional theory (DFT) calculations reveal that the borate-based bilayer SEI, characterized by an exceptional dense structure, effectively suppresses lithium dendrite growth, and certify the crucial role of inorganic component continuity and density within the SEI, which surpasses the absorption and migration energy barrier in terms of significance. This profound understanding of SEI structure holds great potential for advancing the development of high-stable LMBs and can be expanded to other battery system.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Baolei Li,Qingsong Cai,Jianmin Zhang,Kai Zhang,Zongmin Zheng
The lithium metal batteries (LMBs) using Li metal as the anode are becoming one of the representatives of next-generation high-energy–density batteries. However, uneven deposition and stripping of Li usually cause capacity loss during cycling. To address these issues, NO 3 − intercalated LiAl layered double hydroxides (LiAl-LDHs) nanosheets were used as novel solid additives for conventional carbonate electrolytes. The abundant Li + transport pathways brought by LiAl-LDHs and the interlayer NO 3 − in LiAl-LDHs are beneficial to the uniform concentration distribution of Li + and high-quality solid electrolyte interface (SEI), thereby achieving stable deposition/stripping of Li. The assembled Li||Li symmetric cell was cycled stably for 500 h at a current density of 0.5 mA cm −2 . The Li||LFP(LiFePO 4 ) full cell had a capacity retention of 90 % after 800 cycles at 1C. Even at a high operating temperature of 50 °C, the Li||Li symmetric cells and Li||LFP full cells can still obtain steady charging-discharging performances.
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高影响因子
LUMINESCENCE
·
2018
·Vol. 33
·期 2
·438-442
·
IF 1.671
Ting Li,Zhijun Wang,Panlai Li,Shuchao Xu,Qiongyu Bai,Zhiping Yang
A novel tunable red emitting phosphor LiBaB 9 O 15 :Sm 2+ /Sm 3+ , Li + with broad excitation band was synthesized by a high temperature solid-state method. Luminescence properties were investigated in detail by luminescence, X-ray photoelectron spectroscopy (XPS) spectra and CIE chromaticity coordinates. XPS data confirmed that there were Sm 3+ in LiBaB 9 O 15 :Sm 3+ and Sm 2+ /Sm 3+ in LiBaB 9 O 15 :Sm 2+ /Sm 3+ , respectively. Spectral property of LiBaB 9 O 15 :Sm 3+ , LiBaB 9 O 15 :Sm 3+ /Sm 2+ and LiBaB 9 O 15 :Sm 2+ , Li + presented that the excitation band of Sm 3+ widened and the excitation band of Sm 2+ ranged from 350 to 450 nm. And the red light color is tunable with changing Li + concentration. The results indicated that LiBaB 9 O 15 :Sm 2+ /Sm 3+ , Li + may be promising red phosphor for white light emitting diodes.
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高影响因子
MOLECULES
·
2025
·Vol. 30
·期 4
·808
·
IF 4.6
Jinhai Cui,Dezhi Chen,Mengna Xie,Yongheng Zhou,Shuai Dong,Wei Wei
One method to enhance the electrochemical performance of carbon-coated Li2FeSiO4cathode material in lithium-ion batteries is to produce an ideal Li2FeSiO4precursor with minimal impurities. A novel precursor for Li2FeSiO4(Li2O·FeCO3·CH3OSiO2H) was synthesized through a methanol solvothermal reaction under stringent conditions (180 °C and 2.7 MPa), achieving a purity level of 93.2%. During synthesis, the new Li2FeSiO4precursor exhibits unique self-purification properties and maintains a fine morphology after annealing. The resulting carbon-coated Li2FeSiO4composites demonstrate a Brunauer–Emmett–Teller specific surface area of 102.4 m2/g and approximately 81% mesoporous volume, with 90% of the pore sizes measuring less than 39 nm. As a cathode material for lithium-ion batteries, this carbon-coated Li2FeSiO4exhibits initial specific capacities of 172.3 mAh/g (charge) and 159.3 mAh/g (discharge). Remarkably, nearly 50% of the theoretical specific capacity remains after 1300 cycles at a rate of 0.1 C. The excellent electrochemical performance of the carbon-coated Li2FeSiO4materials is demonstrated by their high lithium-ion diffusivity (DLi+) value of 1.26 × 10−11cm2/s. Additionally, the enormous capacities-controlled diffusion contribution, which accounts for 70% of the total diffusion at a rate of 1C, is noteworthy. This performance can be attributed to the high purity of the carbon-free Li2FeSiO4composite, which contains 91% Li2FeSiO4, as well as its favorable morphology.
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高影响因子
Matter
·
2024
·
IF 17.3
Pei Li,Shuo Yang,Jiaxiong Zhu,Shengnan Wang,Yue Hou,Huilin Cui,Ze Chen,Rong Zhang,Zhuoxi Wu,Yiqiao Wang,Zhiquan Wei,Xinghui Liu,Shaoce Zhang,Xinliang Li,Chunyi Zhi
Chlorine-based electrochemical energy storage is a promising candidate for sustainable battery technology. The anionic redox reaction of Cl 0/−1 is of interest due to its superior redox potential (1.36 V vs . standard hydrogen electrode [SHE]), capacity (756 mAh g −1 ), high power, and low cost. Although Cl chemistry has been used in aqueous batteries for a long time, its deployment in organic lithium batteries has been significantly impeded due to the insolubility of Cl − ions (<0.1 M). Scarce oxidizable Cl − blocks redox reactions and the inevitable lithium chloride (LiCl) film passivates electrodes on discharge. We report a eutectic effect to improve the Cl − solubility in organic electrolytes (2 M or higher) by mixing a series of N-/P-centered chloride salts with lithium bis(trifluoromethanesulfonyl)imide at specific ratios. Based on an optimized Cl − concentration, a Li-Cl 2 cell using I as a chemical fixation can achieve a three-electron transfer with a specific capacity of 702 mAh g −1 and an energy density of 1,116 Wh kg −1 .
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Zhengping Ding,Ran Song,Yu Shen,Huahui Lin,Peng Wei,Xiangqun Zhuge,Ke Qu,Zhenzhong Yang,Yurong Ren
Combining a high cut-off voltage cathode with a high specific-capacity lithium metal anode offers a promising path toward ultra-high-energy-density batteries (> 400 Wh kg -1 ). However, the practical application of LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)||Li batteries with a 4.5 V cut-off voltage is challenged by severe interface deterioration. This study introduces a novel bifunctional electrolyte additive called 2,2,2-Trifluoroethyl Nonafluorobutanesulfonate (TNS), designed to form a thin, robust electrolyte interface layer on both cathode and anode surfaces. Detailed analysis reveals that TNS decomposes and modifies the solid-electrolyte-interface layer. Through the synergistic effects of fluoride and sulfonate functional groups, the resulting cathode-electrolyte-interface (CEI) enhances the structural stability of NCM811 while providing a high-efficiency lithium-ion transport channel to accelerate Li + insertion and extraction. At a cut-off voltage of 4.5 V, NCM811||Li batteries with 1 % TNS (by weight) exhibit high discharge capacity retention of 74.2 % after 150 cycles at a 1C rate and 60.1 % after 150 cycles at a 2C rate. This study offers valuable insights for designing high-voltage electrolyte additives in ultra-high-energy-density lithium metal batteries.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yanli Zhao,Ziqi Cao,Yanxiang Liang,Zhichen Liang,Keyin Ling,Feiyan Zhou,Changsheng Guo,Yao Qian,Pengbi Liu,Xi Liu,Chunguang Wang,Mengchen Zhang,Qinglei Zhang
Membrane consisting of high-throughput aligned ion channels has been pursued for precise Li + /Mg 2+ separation. Herein, an aligned amino-functionalized γ-cyclodextrin nanofiltration membrane was fabricated via a customized interfacial polymerization technique, where the orientation of cyclodextrin ion channels was elaborately tailored by controlling the reaction conditions. The as-fabricated membrane featured ultra-thin selective layer of ∼ 26 nm, average pore size of ∼ 0.72 nm, and ultra-stable positive surface charges. In particular, the aligned intrinsic cyclodextrin cavities in the membrane offered vertical shortcuts for preferential Li + transport. Taking advantage of these, superior membrane permselectivity was achieved with the water permeance of 6.5 L·m −2 ·h −1 ·bar −1 and the Li + /Mg 2+ separation factor up to 22.5, highlighting the great potentials in lithium extraction and other ion separations. Given its simplicity and generality, this customized interfacial polymerization strategy holds great promise for manipulating aligned transport channels in thin film composite membranes, thereby enhancing their performance in a wide range of applications including, but not limited to, desalination, water purification, resource extraction, and energy conversion.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qihui Wang,Xingyu Yang,Changwen Li,Chenyu Zhao,Yujie Huang,Shuqi Qiu,Yaru Qin,Chenglong Shi
The titanium-based lithium ion sieve adsorbent H 2 TiO 3 (HTO), known for its structural stability and high adsorption capacity, emerges as a highly promising material. Nonetheless, its precursor, the Li 2 TiO 3 powder (LTO), synthesized via the high-temperature solid-phase method, tends to agglomerate and poses challenges in separation. This agglomeration compromises the adsorption sites and, consequently, its adsorption capacity. To counter this, we employed a strategy of doping LTO with magnetic Fe 3 O 4 nanoparticles as a Fe source, aiming to mitigate the agglomeration issue. Subsequently, Fe-doped H 2 TiO 3 (HFTO) was obtained by acid washing and used to adsorb lithium ions from an aqueous solution. Experimental results revealed that HFTO's equilibrium adsorption capacity for lithium in LiCl solution peaked at 34.27 mg/g. Moreover, even after five cycles of adsorption–desorption, HFTO maintained an adsorption capacity exceeding 32.00 mg/g. Investigations into HFTO's adsorption mechanism, utilizing Raman spectroscopy, FT-IR, and XPS , uncovered that the adsorption of Li + by HFTO occurs through the dissociation of O–H bonds and the subsequent formation of O-Li bonds.
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Journal of Materials Chemistry A
·
2024
·Vol. 13
·期 1
·399-408
·
IF 10.7
Qiangfeng Zhang,Shijie Xu,Haipeng Zhu,Zhao Chen,Libao Chen,Chunxiao Zhang,Weifeng Wei
High-voltage lithium-rich manganese-based oxides (LRMOs) are expected to become next-generation mainstream cathodes due to their higher voltage, higher specific capacity and lower cost. However, currently commercialized carbonate electrolytes still face the challenge of poor decomposition of solvents and lithium salts at high voltage, leading to serious interface side reactions and electrochemical performance degradation. Herein, we propose an interfacial chemical modification strategy based on the dual additives of fluoroethylene carbonate (FEC) and tris(trimethylsilyl)phosphate (TMSPa), to promote Li+ migration and ensure long-term cycling stability of LRMO-based batteries. Detailed characterization reveals that the dual additives FEC-TMSPa can promote the desolvation process of Li+ and reduce the adverse decomposition of electrolyte components by regulating the solvation structure of the electrolyte. Simultaneously, dual additives can facilitate the formation of a robust cathode electrolyte interphase (CEI)/solid electrolyte interphase (SEI) rich-in F/P/Si species, thereby reducing the interface side reactions, inhibiting the erosion of acidic substances on electrodes, and promoting the uniform deposition/stripping of Li+. As a result, the high-voltage LRMO-based batteries exhibit excellent rate performance and cycling stability, with a capacity retention of 82.36% after 500 cycles at 30 °C, and 86.9% after 150 cycles at a high-temperature of 55 °C, suggesting that the proposed strategy of synergistically regulating the interface chemistry with multiple additives is anticipated to facilitate the further application of high-voltage layered cathode materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qianwei Zhang,Rong Yang,Chao Li,Meng Luo,Yu Jiang,Chaojiang Fan,Yinglin Yan,Yunhua Xu
Composite solid-state electrolytes have attracted growing attention due to their good flexibility and wide range of interfaces. However, the inherent poor compatibility at the organic–inorganic interface significantly impedes lithium-ion transport, limiting overall electrochemical performance. In this study, a continuous semi-immobilized ionic liquid interface layer (SIL) was constructed on the surface of three-dimensional Li 6.4 La 3 Zr 2 Al 0.2 O 12 (3D-LLZAO). The SIL facilitates Li + adsorption through the pre-exchanged TFSI - anion with Cl - ions in the ionic liquid within the SIL and promotes rapid hops migration of Li + among anionic sites. In addition, the introduced TFSI - anions reduce the interaction between poly(ethylene oxide) (PEO) chains and Li + , thus enhancing ion mobility. Moreover, the SIL effectively regulates the concentration gradient of Li at the electrolyte/anode interface, ensuring uniform Li + nucleation and deposition. As a result, the prepared 10LIP electrolyte exhibits a simulated Li + diffusion coefficient 5.16 times higher than that of the 10LP electrolyte, alongside an ionic conductivity reaching 6.98 × 10 −4 S cm −1 . This work proposes a rational strategy for enhancing interfacial ion transport in composite solid electrolytes via the introduction of a semi-immobilized ionic liquid interface layer at the organic–inorganic interface, offering valuable insights for the lithium-ion transport at organic–inorganic interface.
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