ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xingwei Liu,Xiaoyu Jiang,Faping Zhong,Xiangming Feng,Weihua Chen,Xinping Ai,Hanxi Yang,Yuliang Cao
Sodium-ion batteries (SIBs) have been viewed as a promising candidate for grid-scale energy storage systems owing to their low cost and abundant Na resources. However, insufficient safety and poor cycling performance of current SIBs are hampering their implementation. Herein, we develop a symmetric SIB by employing Na3V2(PO4)3 as both cathode and anode along with the nonflammable triethyl phosphate dissolving 0.9 M NaClO4 as the electrolyte. The symmetric SIB demonstrates a superior rate capability (35.1 mA h g–1 at 32 C) and excellent cycling performance with a capacity retention of 88.9% after 500 cycles at 2 C. This work demonstrates a new avenue to construct safe and long-cycle-life SIBs with a simple electrode manufacturing process.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
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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
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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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Materials Today Energy
·
2022
·
IF 9.257
Can Luo,Ruyun Qiu,Gen Li,Xiaojun Shi,Zhifei Mao,Rui Wang,Jun Jin,Beibei He,Yansheng Gong,Huanwen Wang
Sodium-ion hybrid capacitors (SIHCs) are promising technology for energy storage because they combine the merits of high-energy batteries and high-power capacitors as well as naturally abundant sodium resource. However, conventional SIHCs consume a mass of electrolyte during the charge process, thus generating some side reactions at high potentials. In this work, we report a novel rocking-chair SIHC using Na 3 V 2 (PO 4 ) 3 /carbon composite nanofibers (denoted as “NVP@CNF”) as binder-free cathodes and SiO 2 -templated hollow carbon nanofibers (HCNF) as the capacitive anode. Resulting from the unique carbon-encapsulation configuration, the NVP@CNF cathode demonstrates excellent rate capability (105.8 mAh/g at 0.5C; 66.9 mAh/g at 100C) and long-term cycling stability (98% capacity retention after 2000 cycles) in sodium half-cells. The as-fabricated HCNF||NVP@CNF SIHC device delivers a high energy density of 216.4 Wh/kg at a power density of 381.8 W/kg. Even at an increased power density of 15272.7 W/kg, the energy density is still as high as 123.0 Wh/kg (based on the total mass of active materials in both electrodes). These results provide a new route to design various flexible self-supporting composite fiber electrodes through a simple electrospinning encapsulation strategy, which finally pushes the development of next-generation hybrid energy storage devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
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
DALTON TRANSACTIONS
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2023
·Vol. 52
·期 15
·4708-4716
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IF 4
Zhaoyang Wang,Jiaxuan Han,Dong Wang,Lingyang Liu,Wenjing Shi,Fangyu Xiong,Haizheng Tao
Na3V2(PO4)3 (NVP) is regarded as one of the most promising cathode materials for sodium-ion batteries (SIBs). However, it suffers from a dense bulk structure and low intrinsic electronic conductivity, which lead to limited electrochemical performances. Herein, we propose a surfactant-assisted molding strategy to regulate the pore-forming process in NVP/C composite cathode materials. More precisely, the forming process of the pores in NVP could be easily controlled by utilizing the huge difference in critical micelle concentration of a surfactant (cetyltrimethylammonium bromide, CTAB) in water and ethanol. By reasonably modulating the ratio of water and ethanol in the solution, the as-synthesized NVP/C sample exhibited a three-dimensional interconnected structure with hierarchical micro/meso/macro-pores. Benefiting from these hierarchical porous structures in NVP/C, the structural stability, contact surface with the electrolyte, and electronic/ionic conductivity were improved simultaneously; whereby the optimized porous NVP/C sample exhibited an excellent high-rate performance (61.3 mA h g−1 at 10 C) and superior cycling stability (90.2% capacity retention after 500 cycles at 10 C).
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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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CHEMISTRY-A EUROPEAN JOURNAL
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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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ACS Sustainable Chemistry & Engineering
·
2016
·
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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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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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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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xiangyu Han,Jiaqi Wang,Yongguang Liu,Lei Dai,Ling Wang,Shan Liu
All-solid-state sodium-ion batteries (ASSIBs) with inorganic solid electrolytes can achieve high safety and high energy density when paired with a high-voltage cathode. However, the slow charge transfer and chemical instability between the high-voltage cathode and rigid electrolyte seriously restrict its development. Herein, a high energy density Na4MnCr(PO4)3-based ASSIBs have been achieved by using a simple low-temperature brazing strategy. The in situ generated secondary phase can not only achieve close contact and rapid charge transfer between the Na4MnCr(PO4)3 cathode and electrolyte but also change the interface electric field distribution and reduce interface side reactions effectively. This strategy is simple and easy to implement and has important guidance for the development of other high-energy all-solid-state batteries.
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