ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 51
·2305815
·
IF 19
Huawen Peng,Yafei Su,Xufei Liu,Jiapeng Li,Qiang Zhao
High performance polyamide nanofiltration membranes play important roles in Mg 2+ /Li + separation and Li + extraction, but they are prepared via multiple time-/labor demanding steps. Both the scalability of these membranes and the engineering of membrane modules remain an elusive challenge. Here the design of a Gemini-electrolyte monomer (GEM) featuring bidentate amine groups, quaternary ammonia, and endocyclic contorted conformation is reported. The monomer's low interfacial diffusivity is balanced by high condensational reactivity during its interfacial polymerization with trimesoyl chloride (TMC), leading to the straightforward formation of defect-free, ≈14 nm thick membranes. The membrane shows the highest permeance (≈19.2 L m −2 h −1 bar −1 ) among Mg 2+ /Li + nanofiltration membranes prepared via straightforward interfacial polymerization without post-modification, combined with good Mg 2+ /Li + selectivity (≈15.4) and stability. The validity of GEM design is verified by control monomers. Large-area (1 × 2 m 2 ) GEM-TMC membranes and spiral-wound modules (effective area: 0.5 m 2 ) are prepared, both of which show reproducible and high performance.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
He Yang,Tingting Qin,Xinyan Zhou,Yu Feng,Zizhun Wang,Xin Ge,Nailin Yue,Dabing Li,Wei Zhang,Weitao Zheng
Large anions exhibit slow diffusion kinetics in graphite cathode of dual-ion batteries (DIBs); particularly at high current density, it suffers severely from the largely-reduced interlayer utilization of graphite cathode, which as a bottleneck limits the fast charge application of DIBs. To maximize interlayer utilization and achieve faster anion diffusion kinetics, a fast and uncrowded anion transport channel must be established. Herein, Li + was pre-intercalated into the graphite paper (GP) cathode to increase the interlayer spacing, and then hosted for the P F 6 - anion storage. Combined with theoretical calculation, it shows that the local interlayer spacing enlargement and the residual Li + reduce the anion intercalation energy and diffusion barrier, leading to better rate stability. The obtained GP with Li + pre-intercalation (GP-Li) electrode exhibits a discharge capacity of 23.1 mAh g −1 at a high current of 1300 mA g −1 . This work provides a facile method to efficiently improve the interlayer utilization of graphite cathode at large currents.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Quan Li,Huan Liu,Yanhong Ji,Zhenyu Cui,Feng Yan,Mohammad Younas,Jianxin Li,Benqiao He
Efficiently concentrating dilute lithium ion (Li + ) solution is very important for the synthesis of Li + products after Li + extraction from salt lake brine. In this work, a reversed electric field coupling nanofiltration membrane (RENF) was designed to reject and concentrate Li + solution from a low concentration feed. The effects of membrane pore structure, electric field and electrode spacing, and feed properties on Li + rejection of RENF process were investigated. The concentration performance and energy consumption of the RENF process were also explored. Results showed that the NF membrane with a small structural coefficient under an electric field of >8 V/cm exhibited high Li + rejection. A Li + rejection of 97.01% by RENF and a high permeation flux were achieved. Likewise, the RENF showed a stable concentrating performance with a high Li + recovery for dilute Li + solution. The energy consumption of the RENF process only has a 0.17% increase as compared with the NF process, an order of magnitude lower than that of the RO process. The high rejection performance of RENF was resulted from the synergistic effects of the reversed EF dragging force to cations and sieving effect of the NF membrane with a small structural coefficient.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2016
·
IF 2.183
Renping Cao,Wenjie Luo,Haidong Xu,Zhiyang Luo,Qianglin Hu,Ting Fu,Dedong Peng
YbAlO 3 :Mn 4+ , YbAlO 3 :Mn 4+ , Li + , and YbAlO 3 :Mn 4+ , Mg 2+ phosphors are synthesized by high temperature solid-state reaction method in air. Their crystal structures and luminescence properties are investigated. Photoluminescence excitation (PLE) spectrum monitored at 677 nm contains broad PLE band with three PLE peaks located at ∼318, 395, and 470 nm within the range 220–600 nm. Emission spectra with excitation 318 and 470 nm exhibit three emission band peaks located at ∼645, 677, and 700 nm in the range of 610–800 nm and their corresponding chromaticity coordinates are about ( x = 0.6942, y = 0.3057). The possible luminous mechanism of Mn 4+ ion is analyzed by the simple energy level diagram of Mn 4+ ion. The optimum Mn 4+ -doped concentration in YbAlO 3 :Mn 4+ phosphor is about 0.4 mol% and the luminescence lifetime of YbAlO 3 :0.4%Mn 4+ phosphor is ∼0.59 ms. Emission intensity of YbAlO 3 :0.4%Mn 4+ phosphor can be enhanced ∼6 times after Mg 2+ ion is co-doped and it is ∼2 times when Li + ion is co-doped. The content in the paper is useful to research new Mn 4+ -doped luminescence materials and improve luminescence property of other Mn 4+ -doped phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 20
·2777
·
IF 5.3
Zhenhua Feng,Chengwen Liu,Binbin Tang,Xiaojun Yang,Wenjie Jiang,Peng Wang,Xianjun Tang,Hongshan Wang,Xiangdong Zeng,Guangyong Zeng
Graphene oxide (GO) two-dimensional (2D) membranes with unique layer structures and tunable layer spacing have special advantages and great potential in the field of water treatment. However, GO membranes face the issues of weak anti-swelling ability as well as poor permeability. We prepared GO/Ti3C2TX2D composite membranes with 2D/2D structures by intercalating Ti3C2TXnanosheets with slightly smaller sizes into GO membranes. Ti3C2TXintercalation can effectively expand the layer spacing of GO, thereby substantially enhancing the flux of the composite membrane (2.82 to 6.35 L·m−2·h−1). Moreover, the GO/Ti3C2TXcomposite membrane exhibited a good Mg2+/Li+separation capability. For the simulated brine, the separation factor of M2 was 3.81, and the salt solution flux was as high as 5.26 L·m−2·h−1. Meanwhile, the incorporation of Ti3C2TXnanosheets significantly improved the stability of GO/Ti3C2TXmembranes in different pH environments. This study provides a unique insight into the preparation of highly permeable and ion-selective GO membranes.Keywords:graphene oxide;Ti3C2TXnanosheets;two-dimensional materials membrane;Mg2+/Li+separation
研究领域:
材料科学
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环境工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Erhui Zhang,Weifeng Liu,Qi Liang,Xuguang Liu,Zongbin Zhao,Yongzhen Yang
To meet the requirements of industrial lithium extraction from the simulated acidic leaching solution of fly ash, one novel ion-imprinted graphene-based hybrid aerogel (LIIP@N-CMS/GA) has been developed by a combination of pulse electropolymerization and surface ion imprinting technique. The imprinted film consists of polypyrrole (PPy), graphene oxide (GO), benzo-12-crown 4-ether (B12C4) and nitrogen-doped carbon microspheres/graphene aerogel (N-CMS/GA). By integrating the electric field driving and specific recognition of B12C4 towards Li + , the LIIP@N-CMS/GA electrode achieves excellent ionic separation performance, including high adsorption capacity of 41.05 mg g −1 with superior retention ratio (keeping 91.7% of the initial value even experiencing 10 cycles of electrochemical adsorption–desorption), short equilibration time less than 2 h, and relatively high selectivity separation factor of 51.99, 19.66, 14.37 and 12.40 against Na + , K + , Mg 2+ and Al 3+ , respectively. These performances originate from the synergistic effects of the porous structure of N-CMS/GA with excellent conductivity, specific recognition of B12C4 towards Li + , and electric field driving which accelerates ion transport as well as electron transfer. Therefore, LIIP@N-CMS/GA can act as an outstanding candidate for lithium extraction in acidic environment.
研究领域:
材料科学
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环境工程
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JAPANESE JOURNAL OF APPLIED PHYSICS
·
2022
·Vol. 61
·期 6
·062002
·
IF 1.491
Lei Wang,Subiyinuer Jilili,Ayinuremu Tuerxun,Aierken Sidike,Qingling Wang
A series of Tb3+, Eu3+, Li+ co-doped SrSiO3 phosphors were prepared using the high-temperature solid-phase method. The X-ray diffraction results showed that Tb3+ and Eu3+ successfully entered into the SrSiO3 matrix lattice. Strong energy transfer from Tb3+ to Eu3+ is exhibited with a calculated energy transfer efficiency of 94.7%. Doping of the charge compensator Li+ increased the luminescence intensity of the SrSiO3:6%Tb3+, 6%Eu3+, 3%Li+ phosphor at a wavelength of 614 nm by 4.2 times and significantly improved the color purity of this phosphor (Cp = 85.9%). Based on color coordinate analysis, the phosphor color coordinates are located near (0.615, 0.365), which belongs to the red region. The phosphor was integrated into a white LED. The resultant package exhibited a color temperature of 6479 K and a color rendering index of 93.8. Its luminous performance was also very stable under different drive currents.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2017
·Vol. 32
·期 6
·908-912
·
IF 1.509
Renping Cao,Jinlong Zhang,Wudi Wang,Qianglin Hu,Wensheng Li,Wen Ruan,Hui Ao
CaSnO 3 :Bi 3+ blue-emitting phosphor was synthesized using a high-temperature solid-state reaction method in air. The crystal structures and luminescence properties were investigated. A broad emission band peaking at ~448 nm upon excitation at 262 and 308 nm was observed in the range 330–680 nm at room temperature due to 3 P 1 → 1 S 0 transition of the Bi 3+ ion. The chromaticity coordinate was (0.1786, 0.1665). The optimal Bi 3+ ion concentration was ~0.6 mol% in CaSnO 3 :Bi 3+ phosphor. The emission spectrum of CaSnO 3 :Bi 3+ phosphor showed a blue-shift with increasing temperature from 50 to 300 K due to the influence of temperature on the electron transition of the Bi 3+ ion. The emission intensity of CaSnO 3 :Bi 3+ phosphor may be increased ~1.45 times by co-doping Li + ions as a charge compensator and fluxing agent. The luminescence mechanism is explained by a configurational coordinate diagram of Bi 3+ ion in CaSnO 3 :Bi 3+ phosphor.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yiqing Yao,Hanxu Yang,Jianhui Li
The lithium metal anode is a desirable choice owing to its high theoretical specific capacity. Despite their promising potential, lithium metal batteries (LMBs) face significant challenges in practical applications, such as uncontrolled growth of lithium dendrites and an unstable interface that occurs during repeated deposition and exfoliation of the lithium anode Therefore, this study employs a simple chemical immersion method, which can not only construct a Li-Ca alloy protective layer to improve lithium-ion transport but also provide a LiF-rich interface to further enhance the mechanical strength of the protective layer. The obtained Li-Ca alloy-LiF hybrid layer shows improved performance of the lithium anode. The results indicate that the Li-Li symmetric cell composed of the treated Li can undergo stable cycling over 3000 h under various cycling conditions and also exhibit excellent cycle performance in the Li-LiFePO 4 cell.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhixiang Meng,Meiling Wang,Xun Cao,Tian Wang,Yongchao Wang,Yike Xu,Weifeng Liu,Lin Chen,Yizhong Huang,Xuguang Liu
Li + ion-sieve (LIS) films, foams, or granules have been fabricated to immobilize LIS to overcome powder loss for Li extraction from seawater. However, the practical application is still restricted by their low swelling ability and poor flexibility to withstand harsh marine environment for a long time. Here, a highly elastic interconnected porous LIS nanocomposite hydrogel with tunable pore structure and flexibility, as well as good swelling property, is prepared by using LIS (viz. λ-MnO 2 ) as a pore self-modifier during the in-situ fabrication of polypyrrole (PPy) and polyvinyl alcohol (PVA) interpenetrating hydrogel (denoted as λ-MnO 2 @IG). In addition to physical confinement interactions, the strong coordination/chelation and electrostatic interactions between λ-MnO 2 nanoparticles and polymer chains enable well-dispersed λ-MnO 2 nanoparticles to be confined in a rich network structure. Even at a marine environment (pH 8.3), the λ-MnO 2 @IG hydrogel exhibits superior Li + adsorption performance (20.6 mg g −1 HMO), outperforming most adsorbents containing LIS. Specially, the porous hydrogel is easily recyclable and exhibits super-stable cyclic Li extraction performance, which are directly attributable to the further-improved pore structure in continuous regeneration process. This study provides a self-regulating strategy to design LIS porous hydrogels with controllable porosity, high flexibility, good swelling ability, and excellent cycle stability to address the growing Li + demanding challenges.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Yuxing Bai,Liwei Wu,Qilin Cheng,Li Wu,Yongfa Kong,Yi Zhang,Jingjun Xu
Thermal stability is a crucial index to assess application value of high-power LEDs, which is related to lattice defects. Herein, an effective structure - engineering strategy is proposed to achieve excellent properties. Under the 394 nm excitation, Cs 3 Zn 5.94 B 9 O 21 :0.06Eu 3+ possesses two characteristic emissions peaked at 591 and 612 nm with limited thermal stability. By introducing Li + ions into the lattice, the sample exhibits high color purity and excellent zero-thermal quenching because the defect contents of the phosphor can be effectively modulated via charge-compensation effect. Then, under the stimulus of high temperature, the corresponding trap levels with a suitable depth ( E = 1.27 eV) will release electrons to recombine with the luminescent centers, compensating for the energy loss. The study provides a meaningful guide for optimizing and designing novel functional photoluminescent materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 42
·36118-36124
·
IF 3.289
Y. Feng,W. L. Li,D. Xu,W. P. Cao,Y. Yu,W. D. Fei
Recently, we proposed a new approach (Li+–Al3+ ionic pairs doping) to enhance the piezoelectric properties of BaTiO3 ceramic. Here we sequentially prove that Li+ and Al3+ can also enhance the piezoelectric properties of PbZr0.52Ti0.48O3 (PZT) ceramic. The X-ray diffraction results demonstrate the optimized distribution of Li+–Al3+ ionic pairs parallel to the [001] direction in the doped ceramics, as same as the results in BaTiO3-based ceramic. The doped ceramics exhibit constricted hysteresis loops, which is associated with the restoring force of Li+–Al3+ ionic pairs as a result of the Coulomb force between Li+ and Al3+ ions. The results show that the piezoelectric properties and corresponding temperature stability of the doped ceramics were enhanced significantly. The analysis and conclusion indicate that the piezoelectric mechanism coming from ionic pairs applies equally well to the PZT ceramic. Co-doping Li+ and Al3+ into the A-site is a preferable approach for the piezoelectric property enhancement of ABO3 ferroelectric ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）