Energy Storage Materials
·
2025
·
IF 20.2
Yong Li,Qiming Xiao,Yun Zhao,Shu Zhao,Bin Liu
Alluaudite-type Na 2+2x Fe 2-2x (SO 4 ) 3 (NFS) compounds, as a promising polyanionic cathode material for sodium-ion batteries (SIBs), have attracted considerable attention owing to their cost-effectiveness and elevated operating voltage. Nevertheless, practical implementation of NFS has been hindered by inherent limitations including insufficient crystallinity and compromised electronic/ionic conductivity. Herein, we propose a pioneering dual-strategy integrating cation substitution with crystal engineering to synthesize Mg 2+ -doped single-crystalline NFS enveloped by flash graphene (denoted as [email protected] ). Through synchrotron radiation characterization complemented by density functional theory (DFT) simulations, we verified the preferential occupation of magnesium at the target iron site. Notably, while preserving the fundamental alluaudite framework, this strategic doping induced a band structure modulation with reduced bandgap and diminished Na⁺ diffusion barriers, synergistically enhancing charge transfer kinetics. The optimized [email protected] cathode delivers remarkable rate performance (63 mAh g -1 at 100C vs 21 mAh g -1 for the undoped counterpart) and unprecedented cyclability, retaining 92.8 % capacity after 7,000 cycles at 50C. In addition, the pillar effect of Mg 2+ in the crystal, as evidenced by in-situ XRD results, greatly inhibited the migration of Fe 3+ during cycling, maintaining the stable structure and resulting in outstanding cycling stability under drastic conditions. These findings establish a universal crystal engineering paradigm for developing high-performance polyanionic cathodes in energy storage systems.
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DOI
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2021
·Vol. 53
·期 12
·1059-1068
·
IF 1.607
Ying Wang,Minhao Yin,Aiguo Tang,Xianjuan Pang,Ningyi Yuan,Jianning Ding
In this paper, the dual-component silane films composed of trimethoxysilane and bis[3-(triethoxysilyl)propyl]tetrasulfide (BTESPT) were prepared on the surface of AZ31B Mg alloys. The selected trimethoxysilanes had different chain length. The results showed that the dual-component silane films could effectively enhance the corrosion resistance of Mg alloys. Moreover, with the enlarging of the chain length of trimethoxysilane, the hydrophobic property and the corrosion resistance of the dual-component silane films were enhanced. And the dual-component silane film composed of BTESPT and octadecyltrimethoxysilane (OTMS) showed the highest contact angle and the best corrosion resistance. It could be ascribed to the high density of CH 2 groups and –S–S–S–S– in the dual-component silane film, greatly improving the hydrophobicity and the anticorrosion property. Simultaneously, the substantial Si–O–Si network in the dual-component silane film also enlarged the length of the penetration paths for corrosive media, delaying the corrosion of the Mg alloy.
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高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Fan Peng,Youqi Chu,Yu Li,Qichang Pan,Guangchang Yang,Lixuan Zhang,Sijiang Hu,Fenghua Zheng,Hongqiang Wang,Qingyu Li
The Nickel-rich layered cathode materials charged to 4.5 V can obtain a specific capacity of more than 200 mAh g −1 . However, the nickel-rich layered cathode materials suffer from the severe capacity fade during high-voltage cycling, which is related to the phase transformation and the surface sides reactions caused by the lattice oxygen evolution. Here, the simultaneous construction of a Mg, Ti-based surface integrated layer and bulk doping through Mg, Ti surface treatment could suppress the lattice oxygen evolution of Ni-rich material at deep charging. More importantly, Mg and Ti are co-doped into the particles surface to form an Mg 2 TiO 4 and Mg 0.5– x Ti 2– y (PO 4 ) 3 outer layer with Mg and Ti vacancies. In the constructed surface integrated layer, the reverse electric field in the Mg 2 TiO 4 effectively suppressed the outward migration of the lattice oxygen anions, while Mg 0.5– x Ti 2– y (PO 4 ) 3 outer layer with high electronic conductivity and good lithium ion conductor could effectively maintained the stability of the reaction interface during high-voltage cycling. Meanwhile, bulk Mg and Ti co-doping can mitigate the migration of Ni ions in the bulk to keep the stability of transition metal–oxygen (M−O) bond at deep charging. As a result, the NCM@MTP cathode shows excellent long cycle stability at high-voltage charging, which keep high capacity retention of 89.3% and 84.3% at 1C after 200 and 100 cycles under room and elevated temperature of 25 and 55 °C, respectively. This work provides new insights for manipulating the surface chemistry of electrode materials to suppress the lattice oxygen evolution at high charging voltage.
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高影响因子
AIP Advances
·
2022
·Vol. 12
·期 5
·
IF 1.697
Tu Huan,Zhao Guoying,Hou Jingshan,Liu Yufeng,Zhou Yan,Zhang Ganghua,Sun Hong-Tao,Li Ji-Guang,Fang Yongzheng
White light emitting diodes (LEDs) suffer from two most common drawbacks: the deficiency of the red component and the poor thermal stability of silicone. Ce 3+ -doped garnet phosphors with tailor-made luminescence properties can be achieved by variations in {A}, {B}, and {C} cation sites. Herein, a simultaneous ion co-substitution design strategy has been adopted to synthesize a series of (Y, Ca) 3 (Al, Mg) 2 (Al, Si) 3 O 12 garnet phosphors and corresponding phosphor-in-glass (PiG) films. The co-substitution is finely restricted to the assigned sites. The emission peak is shifted from 529 to 565 nm, which is beneficial to obtain low color temperatures and high color rendering using a single phosphor for white LEDs. By employing the as-synthesized phosphor, the corresponding PiG films were fabricated by the low temperature co-sintering technology using the SiO 2 –B 2 O 3 –ZnO–Na 2 O glass system characterized with excellent thermal stability and moisture resistance. The morphological and elemental analyses demonstrated that the as-made phosphor powders were uniformly distributed in the glass host without any interfacial reactions. Finally, modular white LEDs with a high color rendering (Ra = 82.7) is achieved through the as-synthesized PiG film on an InGaN blue chip. This study may open up a facile approach to obtain high quality luminescence based on the mono-luminescence center, avoiding excitation energy wastage and low quantum efficiency aroused by multi-luminescence centers or color compensation phosphors in glass.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 32
·17261-17269
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IF 12.732
Jinji Liang,Chenhan Lin,Xiangcong Meng,Min Liang,Jie Lai,Xuhong Zheng,Quanzhuang Huang,Liying Liu,Zhicong Shi
Mn-based layered oxides, as potential cathodes for potassium-ion batteries (PIBs), face major challenges such as consecutive phase transition, serious capacity loss, and sluggish K+ transport kinetics. Herein, Co–Mg co-substituted K0.45Co1/12Mg1/12Mn5/6O2 is designed as a promising cathode material for PIBs to conquer the above issues in this work. Co3+–Mg2+ ions occupying the Mn3+ sites are confirmed to effectively alleviate the Jahn–Teller distortion induced by Mn3+ ions. P3-K0.45Co1/12Mg1/12Mn5/6O2 exhibits highly reversible single-phase structural evolution during the K+ deintercalation/intercalation. In contrast, the pristine K0.45MnO2 electrode experiences incompletely reversible structural variation from a P′3 to P3 phase. The increase of structural stability in the Co–Mg co-substituted sample is the main reason leading to improved cycling stability. Moreover, K0.45Co1/12Mg1/12Mn5/6O2 delivers better rate capability resulting from faster K+ diffusion compared to K0.45MnO2. Therefore, Co–Mg co-substitution is an effective strategy to enhance the structural stability and electrochemical properties of Mn-based layered oxides in PIBs.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 18
·1-16
·
IF 2.8
Yang Zaizhi,Shen Yalong,Zhu Yuan,Jiang Xiaoming,Liu Rui,Yang Zhen,Wang Shouliang,Xu Dong
Flash sintering has revolutionized the field of advanced ceramic preparation with the low heating temperature and extremely short sintering time. The difference of doped ions radius can influence the defect structure and resistivity of the sample through lattice distortion, subsequently altering the parameters and dielectric properties of flash sintering samples. By flash sintering technology, co-doped TiO 2 ceramics with the acceptor ions (Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ ) and donor ions (Nb 5+ ) were successfully prepared at 1100 °C for 24 min. According to the blackbody radiation model, Mg 2+ and Nb 5+ co-doped TiO 2 ceramics exhibit the highest surface temperature at the moment of flash sintering, approximately 1852 °C. Additionally, the co-doped TiO 2 ceramics with Ba 2+ and Nb 5+ ions exhibit the strongest polarization effect, with a dielectric constant above 10 5 . The acceptor ions with larger ions increase oxygen vacancies by enhancing the stability of defect complexes. The excellent giant dielectric properties are attributed to the combined action of the electron-pinned defect dipole effect and the internal barrier layer capacitor effect.
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高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jiawei Zhou,Ming Liu,Xue Chen,Shiyang Bai,Jihong Sun
The purification and separation of CO 2 , CH 4 , and N 2 from biogas, flue gas, and coalbed gas for carbon capture and storage are main technology in mitigating the greenhouse effect. The Mg-MOF-74@clinoptilolite (Mg-MOF-74@CP) composites are successfully synthesized through an interfacial growth of Mg-MOF-74 onto the surfaces of the synthesized CP for adsorption and separation of CO 2 , CH 4 , and N 2 . The structural characteristics of the resultant composites are systematically characterized by various characterizations. In particular, small-angle X-ray scattering (SAXS) patterns are used to elucidate the fractal structural evolutions of the parent CP, Mg-MOF-74, and Mg-MOF-74@CP. Meanwhile, the single-component adsorption isotherms for CO 2 , CH 4 , and N 2 are demonstrated. The breakthrough measurements on CO 2 /CH 4 and cycling tests on CO 2 are conducted. The results elucidate that the CO 2 equilibrium capacity of Mg-MOF-74@CP is higher than that of parent CP, displaying a high affinity toward CO 2 , the longer breakthrough time and enhancement of CO 2 uptake exhibit a better separation performance. The cycling tests on CO 2 reveal that the Mg-MOF-74@CP could be used repetitively, promoting its practical application in an energy-saving and economical way. Additionally, the adsorption isotherms and adsorption sites of the prepared Mg-MOF-74@CP are simulated using the Grand Canonical Monte Carlo (GCMC) method, elucidating the mechanism of the gas separation performance of Mg-MOF-74@CP.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Yinghui Sun,Guojie Zhang,Ying Xu,Riguang Zhang
The catalytic activity of DRM reaction over 1M-1Co-1Ce/AC-N (M = Ca and Mg) catalysts was investigated at 800 °C and under atmospheric pressure. By promoting N-doped activated carbon supported Co-Ce catalysts with alkaline-earth metals to obtain catalysts with better catalytic performance is the main purpose of study. The catalysts were prepared by wet-impregnation method and the influence of impregnation sequence on catalytic performance was also studied. The characterization was conducted using TPR, TPD , XPS, TEM and Raman. The catalyst 1Ca-1Co-1Ce/AC-N promoted with Ca and prepared by co-impregnation exhibited higher catalytic activity than unmodified. This was mainly due to the stronger interaction between metal and support as well as better active metals dispersion. The 1Ca-1Co-1Ce/AC-N catalysts also displayed excellent stability and XPS results indicated that higher Ce 3+ /Ce 4+ and O β /(O α +O β ) ratios were observed on this catalyst. However, the catalyst 1Co-1Ce/1Ca/AC-N prepared with sequential impregnation exhibited poor stability. In addition, the TEM of the spent catalysts revealed that there were a large number of carbons were generated on active metal surface.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jianbin Deng,Xiaohan Zhang,Qijun Zhang,Pu Wang,Deyun Li,Tian Hu,Kai Yao,Xiaoyuan Chen,Zhihao Wu,Yulong Zhang
Immobilizing reactive Mg phases within macroscopic hydrogel matrices may couple nutrient mineralization with direct retention of the resulting solid product, but such material-integrated systems remain insufficiently explored. Here, a macroscopic Mg(OH) 2 -loaded lignin hydrogel (Mg(OH) 2 @LH) was developed for nitrogen (N) and phosphorus (P) recovery from simulated digestate. The self-supporting hydrogel contained 115.60 ± 20.90 mg Mg·g −1 while retaining its porous block architecture. For powdered Mg(OH) 2 @LH passed through a 100-mesh sieve, Mg(OH) 2 @LH achieved apparent NH 4 + -N and total phosphorus uptake capacities of 73.99 and 30.99 mg·g −1 , respectively. NH 4 + -N removal varied modestly and non-monotonically with MgCl 2 impregnation concentration, whereas TP removal remained statistically unchanged across the tested preparation range. Nutrient recovery was sensitive to solution pH and N/P stoichiometry. XRD, FTIR, and SEM–EDS analyses supported the formation of a struvite-containing phase during nutrient recovery, while the non-stoichiometric N/P removal indicated contributions from processes other than struvite formation to the decrease in aqueous NH 4 + -N. Importantly, the recovered struvite-containing lignin hydrogel (MAP-LH) retained a centimeter-scale, self-supporting block form and could be directly retrieved from the liquid phase without additional fine-solid separation. Although intact blocks showed lower nutrient uptake than powdered material, this revealed a trade-off between mass transfer and macroscopic retrievability. Subsequent acidic-soil column experiments showed that MAP-LH resulted in a 53.3% lower cumulative TN leaching ratio than soluble N–P fertilizer and partially alleviated soil acidity. These results demonstrate a retrievable hydrogel architecture that integrates Mg-phase immobilization, nutrient recovery, macroscopic product retention, and post-recovery soil application. Download: Download high-res image (261KB) Download: Download full-size image
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hui Luo,Yunshu Yang,Liwen Lu,Guangxu Li,Xinhua Wang,Xiantun Huang,Xiaoma Tao,Cunke Huang,Zhiqiang Lan,Wenzheng Zhou,Jin Guo,Haizhen Liu
Li–Mg–B–H composite (2LiBH 4 + MgH 2 ) possesses a very high hydrogen storage capacity of 11.4 wt%. However, it still suffers from high operating temperature, slow kinetics, and poor reversibility. In this work, the two-dimensional Ti 3 CN MXene was first synthesized and then introduced into the Li–Mg–B–H composite. The addition of 5 wt% Ti 3 CN reduces the onset dehydrogenation temperature of the 2LiBH 4 + MgH 2 composite by about 50 °C and shortens the induction period of the LiBH 4 decomposition at 400 °C from >90 min to <10 min. The reversible capacity maintains at 8.3 wt% after 20 cycles, with a capacity retention ratio of 93%. Microstructure studies show that Ti 3 CN will partially transform to a highly-dispersed nano-TiB 2 with particle size around 5 nm. Such nano-TiB 2 could serve as an active catalyst to significantly improve the kinetics and reversibility of the Li–Mg–B–H composite. This work offers a strategy to enhancing the hydrogen storage performance of the advanced metal borohydride-based composites by addition of the MXene material and provides some new insights in understanding the role of MXene in tailoring the hydrogen storage properties of the Li–Mg–B–H composite.
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
·
IF 7.129
Qiuling Yin,Peng Lyu,Guanghui Wang,Bing Wang,Yingjie Li,Zhongkui Zhou,Yadan Guo,Lianfang Li,Nansheng Deng
The decommissioning of uranium tailings (UMT) is usually accompanied by uranium (U) contamination in soil, which poses a serious threat to human health and ecological security. Therefore, the remediation of uranium pollution in soil is imminent from ecological and environmental points of view. In recent years, the use of biochar stabilizers to repair uranium tailings (UMT) soil has become a research hotspot. In this study, a novel phosphorus-modified bamboo biochar (PBC) cross-linked Mg–Al layered double-hydroxide composite (PBC@LDH) was prepared. The hyperaccumulator plant Indian mustard ( Brassica juncea L.) was selected as the test plant for outdoor pot experiments, and the stabilizers were added to the UMT soil at the dosage ratio of 15 g kg −1 , which verified the bioconcentrate and translocate of U and associated heavy metal Pb in the UMT soil by Indian mustard after stabilizer remediated. The results shown that, after 50 days of growth, compared with the untreated sample (CK), the Indian mustard in PBC@LDH treatment possessed a better growth and its biomass weight of whole plant was increased by 52.7%. Meanwhile, the bioconcentration factors (BF) of U and Pb for PBC@LDH treatment were significantly decreased by 73.4% and 34.2%, respectively; and the translocation factors (TF) were also commendable reduced by 15.1% and 2.4%, respectively. Furthermore, the Tessier available forms of U and Pb in rhizosphere soil showed a remarkably decrease compared with CK, which reached by 55.97% and 14.1% after PBC@LDH stabilization, respectively. Complexation, precipitation, and reduction of functional groups released by PBC@LDH with U and Pb described the immobilization mechanisms of biochar stabilizer preventing U and Pb enrichment in Indian mustard. As well as, the formation of U-containing vesicles was prevented by the precipitation of −OH functional groups with free U and Pb ions around the cell tissue fluids and vascular bundle structure of plant roots, thereby reducing the migration risk of toxic heavy metals to above-ground parts. In conclusion, this research demonstrates that the PBC@LDH stabilizer offers a potentially effective amendment for the remediation of U contaminated soil.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zelai Cheng,Liming Xu,Xi Wang,Xiaohui Wu,Fangyi Huang,Yulan Jing,Hua Su
Gillespite-type SrCu 0.95 B 0.05 (B 2+ :Cu,Co,Mn,Ni,Mg,Zn)Si 4 O 10 (SCBS) ceramics were prepared by high-temperature solid-state method. Their microwave dielectric properties and crystal structure evolution were studied by P–V-L theory, bond valence model, and X-ray photoelectron spectroscopy. Varying B 2+ ion changed ionic polarizability and bond ionicity, causing dielectric constant ε r of SCBS to change. The change in quality factor Q × f was explained by lattice energy, oxidation state of Cu, and internal strain/fluctuation. The temperature coefficient of resonator frequency τ f was regulated by B–O bond length and valence. The optimal microwave dielectric properties were exhibited by SrCu 0.95 Mn 0.05 Si 4 O 10 after sintering at 1050 °C: ε r ∼5.8 ± 0.03, Q × f ∼65,589 ± 2611 GHz (@15.8 GHz), and τ f ∼ -50 ± 4 ppm/°C. These materials show great potential application prospects for 5G/6G wireless communication.
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高影响因子
危险品化学品经营许可证（带存储）