Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122598
·
IF 7.5
Yu Tang,Shengde Dong,Ping Li,Ying Cheng,Wenjie Liu,Chuanjiang Cheng,Yanxia Sun,Qi Xu,Chunxi Hai,Yuan Zhou
Lithium extraction from hypersaline brines is increasingly important for sustainable energy technologies. Nanofiltration membranes leverage synergistic size exclusion and Donnan effects for Mg 2+ /Li⁺ separation under high-salinity conditions. However, a persistent flux-selectivity dilemma remains, because the highly crosslinked and compact polyamide selective layers required for high Mg 2+ rejection often introduce substantial mass-transfer resistance and limit water flux. Here, we develop a methanol swelling followed by thermal curing strategy to regulate the polyamide network architecture. Swelling promotes structural relaxation and pathway opening, whereas post-curing stabilizes the reconfigured network and narrows the pore-size distribution to strengthen size-sieving. The resulting membrane (PEI-TMC-M h ) delivers a permeation flux of 56.65 L·m −2 ·h −1 in 2000 ppm MgCl 2 while maintaining Mg 2+ rejection above 98%. In simulated brine with Mg 2+ /Li + = 50, a separation factor (S Li/Mg ) of 34.03 is achieved. Two-stage nanofiltration of real salt-lake brine (Mg 2+ /Li + mass ratio 55) yields a Li + -enriched solution containing 26.9 mg·L −1 Li + with a reduced Mg 2+ /Li + mass ratio of 0.65. This work provides a simple post-treatment route to improve the flux–selectivity balance for brine-based lithium extraction.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yi Yang,Yongbin Wang,Bin Zhou,Qi Tang,Ben Pu,Jin Cui,Yan Liu,Weiqing Yang
Mo 2 Ti 2 C 3 T x , a double transition metals (DTM) MXene, has emerged as a novel promising material for a wide range of applications due to its distinctive physicochemical properties. However, the commonly used method for preparing Mo 2 Ti 2 C 3 T x directly employing hydrofluoric (HF) acid as an etchant, is not only hazardous but also time-consuming. Recognizing the exceptional solubility and ultra-fast mass transfer kinetics of supercritical CO 2 (SC-CO 2 ), we introduced an extremely rapid SC-CO 2 assisted etching method that dramatically reduced the etching duration by a factor of 64, from 96 h to 1.5 h, thereby successfully preparing Mo 2 Ti 2 C 3 T x . When served as an anode in lithium-ion batteries (LIBs), the Mo 2 Ti 2 C 3 T x electrode achieves a high reversible specific capacity of 380 mAh g −1 at a current density of 0.1 A g −1 , significantly outperforming pure DTM-MXene-based anodes in terms of most reported capacities. This work provided a promising and efficient method for the etching of DTM-MXene.
研究领域:
材料科学
·
能源存储技术
·
纳米材料合成
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Bao Shiwen,Ma Zhaoyu,Yu Lei,Li Qi,Xia Jiaxiang,Song Song,Sui Kunyan,Zhao Yongye,Liu Xueli,Gao Jun
Certain biological channels exhibit remarkable selectivity, effectively distinguishing between competing cations. If artificial membranes could achieve similar precision in differentiating competing ions from Li + , it could advance sustainable technologies in lithium extraction. In this study, we present a covalent organic framework (COF) membrane featuring a randomly oriented structure that enables selective separation of major competing ions from Li + . The random orientation results in narrow pores, which impart size-based selectivity among alkaline ions. Additionally, the COF incorporates sulfonic groups that preferentially bind to Na + and K + , facilitating their transport while retaining Li + . These synergistic mechanisms endow the membrane with a selectivity beyond detection limit for K + and Na + over Li + . When driven by an electrical potential, the ion flux through the membrane is enhanced by over an order of magnitude. Notably, the membrane also permits the transport of Mg 2+ and Ca 2+ while still rejecting Li + , leveraging differences in their ion mobility. This work should advance the design and construction of biomimetic materials for the extraction of valuable species from seawater and other aqueous sources.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2025
·
IF 3.6
Ming Yan,Haoyu Chen,Yu Zhu,Yuxiao Deng,Zhuanlong Yan,Ziyi Lu,Yanlin Chen
In this study, NH 2 –SiO 2 @Ti 3 C 2 T x core–shell microspheres with different Ti 3 C 2 T x contents are prepared by coating Ti 3 C 2 T x nanosheets on the surfaces of SiO 2 microspheres using an electrostatic self-assembly method. The structures, elemental compositions, and microscopic morphologies of NH 2 –SiO 2 @Ti 3 C 2 T x microspheres are investigated by X-Ray diffraction, Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy, and X-Ray photoelectron spectroscopy. The results show that Ti 3 C 2 T x nanosheets are uniformly coated on the surfaces of the SiO 2 microspheres, and the surfaces of the SiO 2 microspheres are modified by NH 2 . The maximum specific surface area of NH 2 –SiO 2 @Ti 3 C 2 T x composite doped with 15 wt% Ti 3 C 2 T x is 29.937 m 2 g −1 , with an average pore size of 0.11848 cm 3 g −1 . The electrochemical performance test results show that after 100 cycles at a C rate of 0.2C, the specific capacity of the NH 2 –SiO 2 @Ti 3 C 2 T x anode material increases by 270.1% compared to that of SiO 2 , reaching 142.5 mAh g −1 . Compared with SiO 2 , the NH 2 –SiO 2 @Ti 3 C 2 T x materials have higher electrical conductivities and Li ion diffusion rates, thereby improving their rate performances, and the discharge specific capacities and cycling stability are superior to those of the SiO 2 anode material.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Dongwei Zhou,Shihao Wang,Jiansen Wen,Jie Mei,Guiyang Gao,Saichao Li,Baisheng Sa,Jie Lin,Laisen Wang,Guoying Wei,Dong-Liang Peng,Qingshui Xie
Li-rich Mn-based cathode materials, single-solvent, nonflammable feature, high voltage stability, solvation structure
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Shengxi Li,Yanxin Shang,Xuening Ren,Anqi Zhao,Nan Chen,Li Li,Feng Wu,Renjie Chen
Aqueous lithium-ion batteries (ALIBs) have attracted increasing attention for their inherent safety and environmental benefits. However, the narrow electrochemical stability window of water (1.23 V) imposed by hydrogen evolution reaction (HER) and high melting point (0 °C) critically limits the energy density and low-temperature operation. In this work, we report an electrolyte design principle that water activity can be suppressed by strengthening the O–H bonds between water molecules and regulating the pH. A strong polar solvent N,N-dimethylformamide (DMF) interacts with H2O through intermolecular hydrogen bonds, thereby reinforcing the covalent O–H bonds of water. Meanwhile, KOH renders the electrolyte alkaline, inhibiting water dissociation kinetics and consequently raising the HER overpotential. The designed LD1.7W0.6–KOH electrolyte exhibits a freezing point below −82 °C and expanded electrochemical stability window of 4.3 V. The 2.5 V aqueous LiMn2O4/Li4Ti5O12 full cell delivers 2000 cycles at a rate of 6 C with a Coulombic efficiency of 99% at 30 °C and over 1950 cycles at 0 °C. This work offers atomic-level insights into alkaline HER while providing guidance for advancing low-temperature aqueous batteries by tuning the electrolyte structures.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Chenglin Wei,Mengdi Sun,Baoguo Zhang,Zhangyong Yan,Zihao Dang,Yongkang Xu,Lin Wu,Ya Hu
Benefiting from the low cost and natural abundance of sulfur, as well as its excellent theoretical performance metrics - including a capacity of 1675 mAh g −1 and an energy density of 2600 Wh kg −1 - lithium-sulfur (Li-S) batteries have attracted considerable attention for next-generation energy storage. However, their practical deployment is severely hindered by the intrinsic shuttle effect of lithium polysulfides (LiPSs), which leads to the loss of active materials and poor cycling stability. In this work, we report a facile hydrothermal-calcination strategy to synthesize porous nanosheet-structured Fe-doped nickel oxide (Fe-NiO) as a functional separator modifier for Li-S batteries. The polar nature of NiO enables strong chemical interactions with LiPSs, effectively anchoring polysulfides on the cathode side and suppressing the shuttle effect. Furthermore, Fe doping significantly increases the density of surface active sites, thereby enhancing the adsorption and catalytic conversion of LiPSs into insoluble Li 2 S 2 /Li 2 S species, which promotes redox kinetics and mitigates capacity fading. When applied to Li-S cells, the Fe-NiO-modified separator markedly improves the electrochemical performance, delivering a high reversible capacity of 1150 mAh g −1 at 0.2C, an excellent rate capability of 505 mAh g −1 at 5C, and outstanding long-term stability with a minimal capacity decay of 0.091 % per cycle over 500 cycles at 1C. This study presents a simple and scalable strategy for separator engineering, providing a promising pathway toward high-performance Li-S batteries.
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Xiangmin Xu,Xiaowei Zhu,Jinchao Chen,Xingran Zhang,Zhiwei Wang,Fang Li
Ion selective membranes with precise Mg 2+ /Li + separation have attracted extensive interest in lithium extraction to circumvent the lithium supply shortage. However, realizing this target remains a significant challenge mainly due to a high concentration ratio of Mg 2+ /Li + as well as the relatively close ionic hydration radius and chemical. Herein, inspired by the host-guest recognition between alkali-metal ions and crown ether (CE), a novel approach was proposed to regulate the membrane internal structure by introducing CE to strengthen the complexation between Li + and CE. The CE modified membranes achieved the unique outcome of “Li + rejection-Mg 2+ permeation” deriving from enhanced solubility ( K S ) and retarded diffusivity ( D S ) of Li + compared to that of Mg 2+ . The Mg 2+ /Li + separation factors for MgSO 4 /Li 2 SO 4 and MgCl 2 /LiCl of modified membranes ( i.e., 20.1 and 17.7) are about 21.9 and 19.9 time higher than that of pristine membranes, respectively. The results from density function theory (DFT) indicated that the stronger host-guest interaction between CE and Li + combined them closely, thereby increasing solubility and reducing diffusivity of Li + . Our findings develop a new efficient membrane-based strategy enabling the production of high-purity lithium salts from simulated brine.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Weiren Hu,Sen Wang,Long Peng,Xianluo Hu
Energy density, rate capability, and safety are often compromised in lithium-ion batteries (LIBs). To overcome this dilemma, novel electrode structure design is considered as one of the most promising routes. However, simple and scalable fabrication methods are currently very limited. Here, an electrostatic self-assembled three-dimensional Li 4 Ti 5 O 1 2 (3D-LTO) electrode with high-energy density as a whole and excellent thermal stability was fabricated by regulating the zeta potential of electrode components. Such a 3D electrode features an intergraded current collector layer of SiO 2 /ketjen black (KB) and active material layer of SiO 2 /KB/LTO/carbon fiber (CF). Benefiting from its well-designed electronic conductive 3D skeleton and desirable chemical affinity with the liquid electrolyte, outstanding cyclability (capacity retention of 85% over 80 cycles) and rate capability (125 mAh g − 1 at 5 C) could be achieved for Li/3D-LTO cells with a high LTO mass loading of 10 mg cm − 2 . Excellent thermal-tolerance of the 3D electrode enables the cell with good operability and safety at an elevated temperature of 80 ∘ C. The discharge capacity of the Li/3D-LTO half-cell remains 160 mAh g − 1 at 1 C after 100 cycles. This simple and scalable method for the fabrication of the 3D electrodes boosts the energy density, rate capability, and high-temperature operability, which is promising for next-generation LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hongdong Liu,Zhongli Hu,Yongyao Su,Rong Hu,Liangliang Tian,Lei Zhang,Haibo Ruan
Manganese dioxide (MnO 2 ) has been studied as an anode material for Li-ion batteries beyond its high theoretical specific capacity and low-cost. In this work, the 1D α-MnO 2 nanomaterials with different morphology were synthesized via a facile and green hydrothermal method. These materials are carefully investigated by XRD, Raman, SEM and BET techniques. The results show that the solution acidity strongly influenced the morphology and the specific surface area of the sample. The electrochemical behaviors of MnO 2 sample were systematically investigated by cyclic voltammetry and galvanostatic charge-discharge. As anode materials for Li-ion batteries, both of 1.2-MnO 2 and 3.6-MnO 2 deliver high initial discharge capacity and relatively excellent cycle performance, indicating that 1D α-MnO 2 is a promising anode material for high-performance lithium ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bo Wang,Wei Guo,Yongzhu Fu
Lithium–sulfur (Li–S) batteries are promising to enable high-energy-density storage systems; however, their commercialization is hampered by several technical challenges such as polysulfide shuttle and safety issues related to the lithium metal anode. Herein, we use anodized aluminum oxide (AAO) membranes as separators in Li–S batteries for the first time. AAO membranes are rigid and nonflammable, which is helpful for improving battery safety. The aligned and uniform channels within AAO membranes provide fast pathways for lithium ion transport, leading to low areal specific resistance due to the electroosmotic flow of lithium ions in nanoscaled channels. In addition, the AAO separator leads to low overpotential during lithium deposition/stripping in lithium symmetric cells. The Li–S cells with AAO separators show better cycling performance than those with Celgard ones, in particular, at high C rates. At the 2 C rate, the cell shows a battery performance of 480 cycles with a capacity degradation rate of 0.105%, which is much better than that when the Celgard separator is used. This work demonstrates that AAO membranes are promising separators with unique properties for improving the performance of Li–S batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 14
·19480-19492
·
IF 4.672
Jiuqing Liu,Fanli Zeng,Meng Liu,Junying He,Qihou Li,Feifei Song,Zikun Hong,Ya Chen,Lishun Bai,Chen Cheng,Zehao Chen
Summary As one of the most promising energy storage systems, the application of lithium sulfur battery is hindered by low ionic conductivity, poor thermal stability, and a serious shuttle effect of polysulfide species of commercial polyolefin separators. Herein, a kind of novel porous polyetherimide (PEI) based separator (IAPEI-4) with excellent heat resistance and electrochemical properties was prepared. Briefly, by grafting amino group (–NH 2 ) onto the surface of SiO 2 , highly dispersed amino-functionalized SiO 2 (A-SiO 2 ) were synthesized as fillers to blend PEI matrix. Based on physical characterizations of the representative IAPEI-4 separator, abundant micropores and mesopores exist in the separator, and A-SiO 2 nanoparticles are uniformly distributed in the PEI matrix. The ameliorated Li + transport channels and the uniform distribution of A-SiO 2 nanoparticles endow IAPEI-4 separator with higher ionic conductivity (1.60 mS cm −1 ) and Li + transfer number (0.63). Besides, the IAPEI-4 separator exhibits good electrochemical stability and excellent thermal stability (no shrinkage at 200°C). The Li-S cells with the IAPEI separator also show greatly enhanced electrochemical performances. After 100 cycles, its specific discharge capacity can reach 695.4 mAh g −1 at 0.2 C and its capacity retention rate is 84.8%. This simple and effective separator modification method can provide a general strategy to achieve high-performance Li-S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）