JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Hongxia Chen,Yutian Yang,Rihuang Nie,Cheng Li,Shuangwu Xu,Mengcheng Zhou,Xinyu Zhang,Hongming Zhou
Na 3 V 2 (PO 4 ) 3 has been widely studied due to its stable three-dimensional transmission channel structure as a cathode electrode of sodium ion batteries , but its micro particle size and low intrinsic electronic conductivity limit its further development. Therefore, hierarchical porous micro-nano NVP/C materials were successfully prepared using a metal-organic frameworks (MOFs) precursor. Because of the unique hierarchical porous micro-nano structure, 3D highly conductive network between surface and particles, and high specific surface area, M-NVP/C exhibits outstanding rate capability (95.0 mAh g −1 at a current density of 10 C) and extraordinary stable cycle life (the capacity decays from 111.2 mAh g −1 to 108.8 mAh g −1 after 500 cycles at 1 C, with a capacity retention rate of 97.8 %). This method provides a promising pathway for the application of MOFs in battery materials and promotes the development of SIBs in large-scale energy storage systems.
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PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Xiaohong Pei,Shipeng Yang,Xinfeng Zhu,Erjian Sun,Xiaohan Hei,Zhongxian Song,Kai Liu
Development of multi-colour emitting phosphors for applications in LED is always a hot topic in rencent years. Herein, we prepared solid solutions K 2 Y 1- x - y Tb x Eu y Zr(PO 4 ) 3 and studied their luminescent properties. Both Tb 3+ and Eu 3+ emission peaks can be generated by using characteristic exciting wavelength of Tb 3+ (378 nm) due to the Tb 3+ →Eu 3+ energy transfer. By simply changing the relative proportions of Tb 3+ /Eu 3+ , the emitting color of phosphors K 2 Tb 1- y Eu y Zr(PO 4 ) 3 changes from green ( y = 0), through yellow ( y = 0.005) to red ( y = 0.08). Thermostability study showed that at 150 °C, the integral intensity is 57% of that at 25 °C, suggesting a good thermostability. Finally, we fabricated three LED lamps by using a 365 nm chip with y = 0, 0.005, 0.08 phosphors, and green, yellow and red light can be observed.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Shaoxiong Liu,Xiao Li,Siwei Zhong,Wenjia Jiang,Ye Liu,Wenchong Ding,Hai Hu,Zhifeng Huang,Li Liu
NASICON-structured Ti-based polyanion compounds benefit from a stable structural framework, large ion channels, and fast ion mobility . However, the large radius of potassium and its poor electronic conductivity restrict its use in potassium-ion batteries. Herein, hierarchical mesoporous Mn 0.5 Ti 2 (PO 4 ) 3 @C microspheres have been successfully synthesized using a simple electrospraying method. These microspheres consist of Mn 0.5 Ti 2 (PO 4 ) 3 nanoparticles evenly embedded in three-dimensional mesoporous carbon microspheres. The hierarchical mesoporous micro/nanostructure facilitates the rapid insertion and extraction of K + , while the three-dimensional carbon microspheres matrix enhances electrical conductivity and prevents active materials from collapsing during cycling. So the hierarchical mesoporous Mn 0.5 Ti 2 (PO 4 ) 3 @C microspheres exhibit a high reversible discharge specific capacity (306 mA h g −1 at 20 mA g −1 ), a notable rate capability (123 mA h g −1 at 5000 mA g −1 ), and exceptional cycle performance (148 mA h g −1 at 500 mA g −1 after 1000 cycles). The results show that electrosprayed Mn 0.5 Ti 2 (PO 4 ) 3 @C microspheres are a promising anode for PIBs.
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PubMed
高影响因子
Nano Research
·
2019
·Vol. 12
·期 8
·1937-1942
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IF 8.515
Sun Hongxia,Du Haoran,Yu Mengkang,Huang Kuangfu,Yu Nan,Geng Baoyou
Vesicular lithium vanadium phosphate/carbon hollow mesoporous microspheres were fabricated using a facile polyvinylpyrrolidone-assisted aerosol-spray-assisted method and subsequent heat-treatment. While changing the content of polyvinylpyrrolidone, we found that carbon content was adjustable on the surface of lithium vanadium phosphate. By optimizing the carbon content among the composites, the electrochemical performance can be enhanced significantly. The results of electrochemical performance tests suggested that the samples exhibited good cycle performance and high discharge capability in the voltages between 3.0–4.8 V. The observed excellent electrochemical performances could be attributed to the proper content of carbon coating and the vesicular hollow mesoporous microsphere structure, increasing the transmission rate of lithium ions and reducing the structural change during charging and discharging effectively.
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Journal of Materials Chemistry A
·
2015
·Vol. 4
·期 4
·1180-1185
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IF 7.443
Junqi Fang,Suqing Wang,Zhitong Li,Hongbin Chen,Lu Xia,Liangxin Ding,Haihui Wang
Porous Na3V2(PO4)3@C nanocomposites enwrapped in a 3D graphene network were prepared using a simple freeze-drying-assisted thermal treatment method. The carbon layer and 3D graphene network provide not only a 3D conductive network but also a double restriction on the aggregation of Na3V2(PO4)3 particles that have a high crystallinity under high temperature treatment. Due to the high electrochemical activity of the highly crystalline Na3V2(PO4)3 nanoparticles and 3D conductive network, the novel NVP@C/G material displays a superior rate capability (76 mA h g−1 at 60C) and ultra-long cyclability (82% capacity retention for 1500 cycles at 40C) when used in sodium-ion batteries.
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ACS Sustainable Chemistry & Engineering
·
2016
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IF 5.267
Yao Liu,Yirong Zhou,Junxi Zhang,Yongyao Xia,Tong Chen,Shiming Zhang
Sodium iron phosphate (Na3Fe2(PO4)3) as cathode material for sodium-ion batteries has been synthesized through a simple method of a solid state reaction. It crystallizes in a monoclinic structure in the space group C2/c. The morphology of the as-prepared sample has been investigated by scanning electron microscopy and transmission electron microscopy. The charge/discharge curves show a very flat plateau at about 2.5 V (vs Na/Na+). The initial specific discharge capacity is 61 mAh g–1 and remains at 57 mAh g–1 after 500 cycles at a current rate of 1 C. X-ray photoelectron spectroscopy measurements indicate that not all of the Fe3+ of Na3Fe2(PO4)3 is reduced during the electrochemical process. The ex-situ X-ray diffraction measurements were applied to research the mechanism of sodium-ion storage; the results indicated that the Na3Fe2(PO4)3 compound partly transformed into Na4Fe2(PO4)3 and Na3+xFe2(PO4)3 compound. These results testify to the potential of monoclinic Na3Fe2(PO4)3 as a cathode material in sodium-ion batteries.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 66
·16898-16905
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IF 5.317
Jing Zeng,Yang Yang,Shaobo Lai,Jianxing Huang,Yiyong Zhang,Jing Wang,Jinbao Zhao
Graphical Cathode for magnesium-ion batteries : An electrochemically desodiated phase NaV 2 (PO 4 ) 3 /C has been developed as a high-voltage cathode material (ca. 2.5 V vs. Mg 2+ /Mg) for rechargeable magnesium batteries, offering good cycle performance. The electrochemical reaction involves an intercalation mechanism and shows good reversibility. The lack of suitable high-voltage cathode materials has hindered the development of rechargeable magnesium batteries (RMBs). Here, mesoporous Na 3 V 2 (PO 4 ) 3 /C (NVP/C) spheres have been synthesized through a facile spray-drying–annealing method, and their electrochemically desodiated phase NaV 2 (PO 4 ) 3 /C (ED-NVP/C) has been investigated as an intercalation host for Mg 2+ ions. The obtained ED-NVP/C exhibits an average discharge voltage of around 2.5 V (vs. Mg 2+ /Mg), higher than those of most previously reported cathode materials. In addition, it can deliver an initial discharge capacity of 88.8 mA h g −1 at 20 mA g −1 , with good cycling stability. Ex situ X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results demonstrate that the electrochemical reaction is based on an intercalation mechanism and shows good reversibility. Galvanostatic intermittent titration technique (GITT) data have revealed that the intercalation process involves a two-phase transition. The reported ED-NVP/C cathode material with high working voltage offers promising potential for application in RMBs.
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Journal of Energy Storage
·
2025
·
IF 9.8
Jicong Zhang,Luwei Shi,Sheng Fei Zhao,Yan Lin,Tao Hu,Ulla Lassi,Ruguang Ma,Chang Ming Li
Na 4 MnV(PO 4 ) 3 is a typical Na-super-ionic-conductor (NASICON), which shows great promise as cathode material for high-performance cost-effective sodium ion batteries. However, sluggish Na + diffusion kinetics coupling with Jahn-Teller effect severely deteriorate its high-rate capability and long-term stability. In this work, we report a regulation strategy of jointly doping dual heteroatoms (Fe and Ni) to realize structural stability of Na 4 MnV(PO 4 ) 3 by shortening bond length and fast ion diffusion. The FMVN electrode delivers a highly reversible capacity of 98 and 79 mAh g −1 at 0.1C and 10C, respectively, while maintaining a stable cycling life over 2000 cycles at 10C. Theoretical calculations and kinetic analysis unveil that the regulation of crystal structure by Fe and Ni joint substitution effectively reduces the Na + migration barrier and simultaneously increases the reversible capacity. Additionally, in-situ x-ray diffraction investigation verifies reversible structure evolution and minor volumetric change (∼4.91 %) in the sodiation/desodiation process. An assembled full cell (FMVN||HC) demonstrates an energy density of 353.9 Wh kg −1 at 0.1C and outstanding cycling durability with 89 % capacity retention after 100 cycles at 2C. This dual substitution strategy in this work holds great promise to develop high-performance NASICON-type cathodes for practical applications.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Junyu Chen,Xuedong Zhang,Feixiang Wu,Long Xie,Feng Li,Nina Wu,Zixuan Cao,Jinwen Zhao,Yuxuan Zhang,Xin He,Hongxia Gu,Jianyu Huang,Qiao Huang
Integrating conversion-type cathodes (such as iron-based fluorides (IBFs)) into sulfide all-solid-state batteries (ASSBs) significantly enhances energy density but faces challenges including unstable cathode/electrolyte interfaces. To mitigate these issues, a near-amorphous Li1.26Mg0.12Zr1.86(PO4)3 (LMZP) coating technology is developed to protect nano-sized FeF2 (n-FeF2) and micro-sized FeF3 (m-FeF3) cathodes from reacting with the sulfide electrolyte for the first time. The LMZP coating approach offers simplicity, low energy consumption and scalability. With the LMZP-coated cathodes and lithium–indium (Li–In) anode, the ASSBs achieve a discharge capacity of 310 mAh g−1 after 600 cycles and a maximum areal capacity of 2 mAh cm−2 for n-FeF2, and 301 mAh g−1 after 700 cycles with a maximum areal capacity of 3.1 mAh cm−2 for m-FeF3. When using a lithium (Li) metal anode, the ASSBs maintain a discharge capacity of 310 mAh g−1 after 300 cycles for n-FeF2 and 300 mAh g−1 after 600 cycles for m-FeF3, demonstrating excellent cycling stability and capacity retention. Notably, a discharge capacity of 280 mAh g−1 is sustained after 200 cycles for n-FeF2 and 301 mAh g−1 after 180 cycles for m-FeF3, with a reduced stack pressure (10 MPa). These results are unprecedented in IBF-based ASSBs, highlighting the potential of advanced coating strategies to enable scalable, high-performance metal fluoride cathodes in ASSBs with higher energy densities.
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Nano Energy
·
2023
·
IF 17.6
Jingwen Zhao,Weitao Yan,Shijia Li,Shiyu Li,Wei-Hua Wang,Ying Bai
The Na superionic conductor of (NASICON)-type Na 4 VMn(PO 4 ) 3 (NVMP) with a three-dimensional framework and high operating voltage has been extensively investigated for sodium-ion batteries (SIBs). However, unexpected Jahn-Teller effect and sluggish Na + diffusion kinetics inevitably lead to rapid capacity fade and unfavorable structural distortion. Herein, the double-pinning effect of Al/F co-doping was adopted for the NVMP system to enhance structural stability and facilitate Na + diffusion. The as-synthesized NVMP-Al&F presents a highly reversible capacity of 110 mAh g −1 at 0.1 C, accompanied with a long-term lifespan of 1000 cycles at 5 C (capacity retention of 86.1 %). Moreover, in situ X-ray diffraction affirms the reversible structural evolution and small volume variation (∼4.43 %) during the highly reversible sodiation/desodiation processes. Benefiting from the double-pinning effect, the lowered Na + migration barrier effectively facilitates Na + diffusion and increases to higher reversible capacity by combining theoretical calculation and kinetic analysis . The assembled NVMP-Al&F//hard carbon (HC) full cell manifests a high energy density of 353.9 Wh kg −1 and excellent cycling durability of 91.3 % at 1 C after 100 cycles. This work sheds light on the double-pinning as a novel strategy to boost the cycling stability of high-performance NASICON-type cathodes.
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CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Nali Li,Yong Yu,Yanwei Tong,Tiantian Liu,Xuefeng Zhang
An enhanced sol-gel combustion method was used to synthesize different porous Sc 3+ -doped Li 3 V 2-x Sc x (PO 4 ) 3 /C (x = 0.00, 0.05, 0.10 and 0.15) compounds. The substitution of Sc 3+ into the V 3+ sites of Li 3 V 2-x Sc x (PO 4 ) 3 /C expands the lattice volume along with the enlargement of Li + diffusion channel, which is beneficial for Li + transportation and ionic conductivity improvement. Besides, the Sc 3+ doping content exhibits a great impact on the morphology of Li 3 V 2-x Sc x (PO 4 ) 3 /C composite. The pristine Li 3 V 2 (PO 4 ) 3 /C are constituted of porous particles and nanorods , and the ratio of nanorods to particles can be controlled by adjusting the amount of Sc 3+ doping since the ratio of nanorods to particles decreases with increasing Sc 3+ doping content. When Sc 3+ doping content increases to a certain level (x = 0.15, Li 3 V 1.85 Sc 0.15 (PO 4 ) 3 /C), the nanorods are hardly seen. Li 3 V 1.90 Sc 0.10 (PO 4 ) 3 /C with higher tapped density, better reversibility, smaller resistance and larger Li + diffusion coefficient demonstrates outstanding rate performance and cyclic stability, together with high specific discharge capacities of 130.2 and 92.9 mAh g −1 at 0.5 and 20 C, respectively. Furthermore, a superior specific discharge capacity of 85.8 mAh g −1 was retained at 20 C following 1000 cycles. Overall, a novel approach for the preparation of high-performance Li 3 V 2-x Sc x (PO 4 ) 3 /C cathodes with different morphologies for lithium-ion batteries is provided.
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Inorganic Chemistry Frontiers
·
2018
·Vol. 5
·期 3
·619-625
·
IF 5.106
Ying Liu,Maxim S. Molokeev,Quanlin Liu,Zhiguo Xia
Crystal structure evolution and temperature-dependent phase transition of solid solutions are much desired for the understanding of the optimization of functional properties. Herein, the NASICON-type NaZr2(PO4)3–SrZr4(PO4)6 solid solutions with the formula Na(2−2x)Srx[ ]xZr4(PO4)6 (0 ≤ x ≤ 1), where [ ] represents the vacancy, were prepared by the sol–gel method, and their crystal structures, phase transitions and thermal expansion properties were investigated in detail. In the range of x = 0.3–0.35, there is a reversible structural phase transition Rc ↔ R and the different structural models of the R phase and Rc phase were built to better understand the phase transition mechanism. We determined the phase transition boundary between the Rc and R structures and predicted the phase transition temperature of Na(2−2x)Srx[ ]xZr4(PO4)6 with any x for further investigation of controlled physical properties. The results indicated that Na0.5Sr0.75[ ]0.75Zr4(PO4)6 showed a near zero thermal expansion in the temperature range of 450–600 K, which can find potential applications.
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