Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 32
·15762-15770
·
IF 9.931
Xi Cao,Lulu Wang,Jitao Chen,Junrong Zheng
A Mg2+/Na+ hybrid aqueous battery with high energy density and low cost is constructed using commercial Mn3O4 as a cathode and NaTi2(PO4)3 as an anode for the first time. During electrochemical cycling, spinel Mn3O4 experiences a transition to layered MnO2 hosting Mg2+/Na+ with a high specific capacity and a long cycling life in Mg2+/Na+ hybrid electrolytes. The battery delivers a discharge potential above 1.2 V and an energy density over 47 W h kg−1 (based on the total mass of electrode materials) at a power density of 48 W kg−1; even at a high power density of 400 W kg−1, it delivers an energy density of 23.6 W h kg−1. What is more, the battery shows an excellent cycling performance with 94% capacity retention after 6000 cycles at 10C. The performances drop only very slightly for batteries prepared by an economic and scalable method. The excellent electrochemical properties, combined with the low cost of raw materials and the ease of scaling up which many aqueous batteries lack, make this approach a very promising cost-effective environment-friendly solution for large-scale energy storage.
研究领域:
材料科学
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电化学
·
储能技术
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DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·3143-3149
·
IF 8.897
Huang Ruling,Xue Qing,Lin Jiao,Zhang XiXue,Zhou Jiahui,Wu Feng,Li Li,Chen Renjie
Layered Mn-based oxides are one of the promising cathode materials for potassium-ion batteries (KIBs) owing to their high theoretical capacities, abundant material supply, and simple synthesis method. However, the structural deterioration resulting from the Jahn-Teller effect of Mn ions hinders their further development in KIBs. Herein, a novel Mn-based layered oxide, K 0.54 Mn 0.78 Mg 0.22 O 2 , is successfully designed and fabricated as KIBs cathode for the first time. It delivers smooth charging/discharging curves with high specific capacity of 132.4 mA·g −1 at 20 mA·g −1 and good high-rate cycling stability with a capacity retention of 84% over 100 cycles at 200 mA·g −1 . Combining in-situ X-ray diffraction (XRD) and ex-situ X-ray photoelectron spectroscopy (XPS) analysis, the storage of K-ions by K 0.54 Mn 0.78 Mg 0.22 O 2 is revealed to be a solid-solution processes with reversible slip of the crystal lattice. The studies suggest that the rational doping of inactive Mg 2+ can effectively suppress the Jahn-Teller effect and provide outstanding structure stability. This work deepens the understanding of the structural evolution of Mn-based layered materials doped with inactive materials during de/potassiation processes.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zuizhi Lu,Hua Fan,Yingjun Ou,Mianhong Chen,Ye Yang,Linawa Shen,Liya Zhou,Xiaotong He,Jiansheng Zhao,Peican Chen
Recently, near-infrared (NIR) light-emitting diodes (LED) have attracted much research attention globally. To advance this technology, NIR phosphors with high efficiency, thermal stability, and broad bands are required. In this work, we modified ZnGa 2 O4:Cr 3+ phosphor with Mg 2+ ions. Results show that this method improves the luminescence intensity of ZnGa 2 O4:Cr 3+ phosphor, and the emission wavelength of the sample can be changed by doping different Mg 2+ concentrations. This method also improved the thermal stability of the samples. The quantum yield of Mg-modified ZnGa 2 O 4 :Cr 3+ phosphors reached 87.12%, and the white LED fabricated with Zn 0.4 Mg 0.6 Ga 2 O 4 :0.01Cr 3+ phosphor and commercial Y 3 Al 5 O 12 :Ce 3+ phosphor demonstrated good performance. The NIR-LED fabricated with Zn 0.4 Mg 0.6 Ga 2 O 4 :0.01Cr 3+ phosphor achieved a photoelectric conversion efficiency of 7.17%. The lines on the surface of an orange taken by a NIR camera reveal that phosphor can be used in night vision lighting. Meanwhile, the distribution of blood vessels in the human palm highlights the promising biological applications of the Zn 0.4 Mg 0.6 Ga 2 O 4 :0.01Cr 3+ phosphor.
研究领域:
材料科学
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光学工程
·
生物医学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yanna Wu,Mengmeng Jia,Shuming Li,Zong Lu,Yanying Wei,Haihui Wang
Lithium extraction from salt lake is important for carbon neutrality, while obtaining both high Li + /Mg 2+ selectivity and high water permeance is still challenging. The burgeoning two-dimensional (2D) material membranes in decade show enormous potential to solve above problem due to its highly designable lamellar structure. In this work, a kind of positively charged laminated membranes using MXene nanosheets as building blocks with decoration of poly (diallyl dimethyl ammonium chloride) (PDDA) were proposed. Benefiting from the well–intercalated PDDA between MXene nanosheets, the interlayer spacing between neighboring nanosheets was greater than 2 nm, which was conductive to enhance water permeance. Simultaneously, the introduction of PDDA endowed the membrane with positive charge, which exhibited sharply improved Li + /Mg 2+ selectivity by an order of magnitude due to enhanced Donnan effect. The prepared MXene/PDDA membrane with a modification mass ratio of 1:10 exhibited high Li + /Mg 2+ selectivity of 29.3 with MgCl 2 saline solution permeance of 9.8 L m −2 h −1 ·bar −1 and pure water permeance of 32.3 L m −2 h −1 ·bar −1 , which was promising for lithium extraction. Such membrane constructing concept could be expanded to other kinds of membranes based on 2D nanosheets for effective ion sieving.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Polymers
·
2025
·Vol. 17
·期 8
·1001
·
IF 4.9
Jingjia He,Lili Wang,Kaiyuan Zheng,Shoukang Hu,Xueke Zhang,Ziyu Mu
In this work, Mg2+modified chitosan (Mg2+/CS) is proposed and successfully designed. By investigating the effects of the Mg2+and CS interaction on hydrogen bonding, dipoles, charge density, surface potential, and roughness, the coordination between Mg2+and CS is verified and the mechanism of coordination improving tribological properties is elucidated. The Mg2+/CS coordination structure enhances intermolecular interactions, promoting the formation of new hydrogen bonds and increasing the dipoles. Compared to CS, the relative dielectric constant of Mg2+/CS increased by 76%, the surface potential increased by 70 mV, and the root mean square roughness increased by 39.4 nm. The open-circuit voltage, short-circuit current, and charge density of the triboelectric nanogenerator (TENG) fabricated from Mg2+/CS were increased by 100%, 94%, and 75%, respectively, compared to the CS-TENG fabricated from pure CS. The coordination of Mg2+increased the charge density of the Mg2+/CS-TENG, significantly enhancing its charge transfer capability. The Mg2+/CS-TENG successfully provided power for photodetectors and LEDs. Mg2+/CS exhibited excellent flexibility and skin adhesion, and the Mg2+/CS-TENG successfully converted the mechanical energy generated by human joint motion into electrical signals. The coordination structure of Mg2+with CS enhances the triboelectric performance of Mg2+/CS-TENG, providing new light for the research of chitosan-based TENGs.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Huawen Peng,Yongjin Hu,Shaoping Li,Jingyi Rao,Qiang Zhao
High performance Mg 2+ /Li + separation membranes are needed to meet the rising demands for lithium supply, yet state-of-the-art polyamide nanofiltration membranes show limited permeance due to relatively dense structures. This work exploited sulfonium salts for the first time to modify nanofiltration membranes , leading to sulfonium-polyamide membranes with high Mg 2+ /Li + separation performance. The occurrence and competition of three types of reactions during the surface modification process were studied and correlated to properties of resultant membranes. Both the positive charge and loose structures of polyamide membranes were enhanced as a result of sulfonium modification, leading to ∼4.3 times improved permeance. The modified membrane exhibited water permeance (∼26.4 L m -2 h -1 bar -1 ) that is one of the top tier values among recent membranes, coupled with good Mg 2+ /Li + selectivity (∼11) in separating high Mg 2+ /Li + ratio feed (∼103). Moreover, the modified membrane showed good stability during one-month continuous operation. This work shows the promising potential of sulfoniums for engineering advanced lithium extraction membranes.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiahao Huang,Huangyingzi Wang,Xuhua Li,Yubin Zhang,Wenxin Chen,Jiaping Wu,Lijun Meng,Manhong Huang
Nanofiltration (NF) is promising for the efficient Mg 2+ /Li + separation from salt-lake brines, which was expected to solve the insufficient supply of lithium resources. However, the conventional NF membranes fabricated by piperazine (PIP) and trimesoyl chloride (TMC) usually exhibit negative charge surface with low Mg 2+ /Li + selectivity. To improve the Mg 2+ /Li + separation, NF membranes with enhanced surface positive charge were fabricated by introducing polyaminopropylbiguanide (PAPB) into the polyamide (PA) active layer. Compared with the pristine membrane, the PAPB modified membrane exhibited both enhanced water flux from 7.50 to 10.50 L/m 2 h•bar and obviously improved MgCl 2 retention from 65.51 % to 96.52 %. High separation factor (S Li/Mg ) of 30.81 was obtained with the Mg 2+ /Li + mass ratios (MLR) of 50:1, attributing to the strong protonation capacity of guanidine groups in a wide pH range. Moreover, the PAPB modified membranes demonstrated a superior anti-fouling performance during NF test. This work presents a novel and facile strategy for the preparation of high-performance NF membranes and provides new insights into the underlying mechanism for the enhancement of Mg 2+ /Li + separation by enhancing positive charge and Donnan exclusion of NF membranes.
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产品关联
DOI
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2022
·
IF 13.716
Qing Jiang,Jia Liu,Xiangru Song,Ye Qiu,Jianliang Xue,Yuqiang Shao,Yujie Feng
Human urine contains abundant nutrients, while separately collecting urine can significantly alleviate nutrient loads in existing wastewater treatment facilities. Herein,0020a novel forward osmosis integrated bioelectro-concentration and recovery system (OsBCRS) was developed to recover nutrient ions from urine. NH 4 + and PO 4 3– migrated out from urine and enriched in the internal chamber of OsBCRS driven by the self-generated electric field, which were further concentrated by water extraction from the integrated forward osmosis (FO) process, and finally recovered as struvite. The current density of OsBCRS reached 27.3 A m –3 , which in turn drove the migration of NH 4 + -N (93.7 ± 1.6%) and PO 4 3– -P (94.6 ± 0.8%) out from urine, and these separated nutrients were enriched by 9.4–9.5 times in the internal chambers. Subsequently, these enriched nutrients in the catholyte were 3.2-fold concentrated with 68.6% of volume reduction by FO. The system removed up to 83.4% of NH 4 + -N and 88.8% of PO 4 3– -P, most of which were recovered as struvite taking advantage of reverse-fluxed Mg 2+ . The recovered struvite exhibited similar crystal structure and composition to that of standard struvite. The preliminary operating cost analysis of OsBCRS demonstrated that the revenue, including electricity generation and struvite recovery, could offset the operating cost. This study demonstrated highly efficient enrichment and recovery of nutrient ions from human urine by OsBCRS in a cost-effective way, and would encourage further exploration for nutrients recovery from wastes.
研究领域:
环境工程
·
废水处理
·
资源回收
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xiaoyang Dong,Jinxing Wang,Jingdong Yang,Xiao Wang,Junyao Xu,Xiaofang Yang,Wen Zeng,Guangsheng Huang,Jingfeng Wang,Fusheng Pan
Hybrid Mg/Li-ions batteries (MLIBs), combining the fast kinetics of Li and the advantages of magnesium ion batteries (MIBs), are regarded as one of the most prospective electrochemical energy storage systems. Nevertheless, the electrochemical properties of batteries are generally limited by the diffusion kinetics of highly-polarized divalent Mg ions in the cathode materials. Herein, rutile-type molybdenum dioxide (R-MoO 2 ) was synthesized by the hydrothermal treatment and subsequent thermal treatment and used as the cathode materials in MIBs and MLIBs. The initial discharge capacities of R-MoO 2 cathodes in MIBs and MLIBs are 50 and 253 mAh·g − 1 at the current density of 50 mA·g − 1 , respectively. The specific capacities are 17 and 111 mAh·g − 1 after 100 cycles. The R-MoO 2 cathode possesses good Coulombic efficiency and rate capability in MLIBs. Compared with MIBs, the electrochemical performances of MLIBs were greatly enhanced. The energy storage mechanisms were investigated by the experiments results and density functional theory (DFT) calculations. Moreover, the discharge-charge mechanisms were also explored by ex-situ characterizations. The diffusion/migration of Mg 2+ and Mg storage abilities are improved by introducing the Li + , promoting electrochemical performances. The energy storage mechanisms are Mg 2+ intercalation in MIBs and Mg 2+ /Li + co-intercalation in MLIBs. This work further investigates the energy storage mechanism of MLIBs and provides the theoretical groundwork for the follow-up development of high-performance cathode materials.
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
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Hancheng Yuan,Nan Wang,Yanna NuLi,Jun Yang,Jiulin Wang
Based on a displacement reaction mechanism, Cu 2 Se is a good candidate for non-insertion-based cathode materials of rechargeable magnesium batteries . Nevertheless, its relatively low electronic conductivity leads to a poor rate capability and an unsatisfactory cycling performance. In this work, we firstly reported the improved electrochemical performance of Cu 2 Se cathode based on displacement reaction for Mg batteries triggered by a Li salt additive in a typical magnesium electrolyte 0.4 mol dm −3 (PhMgCl) 2 -AlCl 3 /THF. Cu 2 Se materials with different morphologies and particle sizes were synthesized by a solvothermal process and a hydrothermal method , respectively. Cu 2 Se with smaller particle sizes by the hydrothermal method exhibits a higher specific capacity (152.7 mAh g −1 first discharge capacity at 0.02 C) but poor cycling performance in 0.4 mol dm −3 (PhMgCl) 2 -AlCl 3 /THF electrolyte. LiCl was added in the magnesium electrolyte to promote the displacement reaction of the Cu 2 Se material. An initial discharge capacity of approximately 239.7 mAh g −1 with 48.4% capacity retention after 20 cycles at 0.1 C can be obtained for Cu 2 Se in 0.4 mol dm −3 (PhMgCl) 2 -AlCl 3 +1.0 mol dm −3 LiCl/THF electrolyte. Furthermore, the cycling performance and rate capability are enhanced by in situ homogeneously anchoring Cu 2 Se particles onto the surface of the reduced graphene oxide (rGO) nanosheets . Cu 2 Se/rGO composite with 10 wt% rGO exhibits 64.2% capacity retention after 20 cycles at 0.1 C, and a more than 120 mAh g −1 reversible capacity at 0.2 C in the hybrid Mg 2+ /Li + electrolyte.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2019
·Vol. 80
·期 5
·950-960
·
IF 1.624
Zhang Caiduan,Liu Feng,Wang Fengjia,Li Haotian,Zeng Fang,Ma Yongliang,Wang Lidong
In order to achieve efficient recovery of ions from the simultaneous desulfurization and denitrification wastewater, the effects of various factors (i.e. the saturation temperature, the cooling termination temperature, the stirring rate and the cooling rate) on crystallization yield, metastable zone width and crystal morphology were investigated to determine the optimal crystallization conditions of Mg 2+ //SO 4 2− , NO 3 – -H 2 O system. According to the results of experiments, the nucleation kinetics were also speculated by Nývlt self-consistent equation and classical 3D nucleation theory. Also, the crystallization products were characterized by X-ray diffraction and scanning electron microscopy. Under the determined optimal conditions, the yield of the crystal can reach 78%, and the crystal products were verified as pure MgSO 4 · 7H 2 O, whose morphology is complete without defects.
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Zhao Yang,Wangxi Fang,Zhenyi Wang,Ruolin Zhang,Yuzhang Zhu,Jian Jin
The wide application of lithium batteries in consumer electronics and electric vehicles bring about ever-rising demand of lithium resources globally. Nanofiltration (NF) membranes with high Mg 2+ /Li + selectivity could achieve highly efficient separation of lithium from natural brines, which provides a good alternative for steady lithium supply. In this work, we developed a dual-skin layer nanofiltration membrane comprised of a polyethylene-imine (PEI) layer grafted on a polyamide layer. The polyamide layer was prepared via interfacial polymerization to endow the NF membrane with sub-nm pores, while the PEI layer was grafted on the polyamide surface via amidation reaction to further equip the membrane with enhanced positive charge. With the synergistic effect of size sieving from the polyamide layer and electrostatic exclusion from the PEI layer, the dual-skin layer NF membrane exhibits a high rejection of 98.5% to MgCl 2 and a low rejection of 46.2% to LiCl, suggesting a high Mg 2+ /Li + selectivity. As using this dual-skin layer NF membrane for separating Li + from a simulated brine, a high Mg 2+ /Li + separation factor (S Mg , Li ) up to 33.4 was achieved, which is the highest value among the pressure-driven polymeric nanofiltration membranes reported so far.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 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）