Journal of Materials Chemistry A
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2018
·Vol. 7
·期 1
·248-256
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IF 9.931
Shuang Liu,Liubin Wang,Jian Liu,Meng Zhou,Qingshun Nian,Yazhi Feng,Zhanliang Tao,Lianyi Shao
Due to the merits of low cost, safety, environmental friendliness, and abundant sodium reserves, non-aqueous and aqueous sodium-ion batteries are wonderful alternatives for large-scale energy storage. Na+ super ionic conductor structured Na3V2(PO4)2F3 is considered as a potential high-capacity cathode material for Na-ion batteries. However, its insufficient cyclability remains a challenge for battery applications. In addition, the narrow electrochemical stability window (1.23 V) of aqueous electrolytes does not allow us to make the best use of it. All of these pose obstacles to the practical voltage and energy output. Therefore, we designed and synthesized a Na3V2(PO4)2F3–SWCNT composite, which demonstrated superior Na+-storage performance with a high reversible capacity of 117 mA h g−1 at a moderate current of 0.5C in non-aqueous electrolyte. In addition, we developed an aqueous rechargeable sodium ion battery using Na3V2(PO4)2F3–SWCNT as the cathode and NaTi2(PO4)3–MWCNT as the anode, and this battery can deliver a high energy density of 150 W h kg−1 with an operating voltage of up to 2.0 V by using the high concentration electrolyte, 17 m NaClO4. The outstanding electrochemical performance makes Na3V2(PO4)2F3–SWCNT a promising cathode for Na+ storage and encourages more investigations into practical sodium-ion battery applications.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 19
·16325-16329
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IF 2.324
Guo Biao,Diao Wenyu,Yuan Tingting,Liu Yuan,Yuan Qi,Li Guannan,Yang Jingang
Carbon-coating Na 3 V 2 (PO 4 ) 2 F 3 nanoparticles (NVPF@C NP) were prepared by a hydrothermal assisted sol–gel method and applied as cathode materials for Na-ion batteries. The as-prepared nanocomposites were composed of Na 3 V 2 (PO 4 ) 2 F 3 nanoparticles with a typical size of ~ 100 nm and an amorphous carbon layer with the thickness of ~ 5 nm. Cyclic voltammetry, rate and cycling, and electrochemical impedance spectroscopy tests were used to discuss the effect of carbon coating and nanostructure. Results display that the as-prepared NVPF@C NP demonstrates a higher rate capability and better long cycling performance compared with bare Na 3 V 2 (PO 4 ) 2 F 3 bulk (72 mA h g −1 at 10 C vs 39 mA h g −1 at 10 and 1 C capacity retention of 95% vs 88% after 50 cycles). The remarking electrode performance was attributed to the combination of nanostructure and carbon coating, which can provide short Na-ion diffusion distance and rapid electron migration.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2022
·Vol. 24
·期 9
·5638-5645
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IF 3.945
Rongting Guo,Wei Li,Mingjun Lu,Yiju Lv,Huiting Ai,Dan Sun,Zheng Liu,Guo-Cheng Han
The nano-scale spherical Na3V2(PO4)2F3 with a NASICON structure phase was prepared with a spray drying technique, and the bagasse in Guangxi, China was selected as the carbon source to prepare Na3V2(PO4)2F3/C. The optimal preparation conditions of the composite determined using thermogravimetry, X-ray diffraction, scanning electron microscopy and electrochemical testing were: a calcination temperature of 650 °C and a 20% carbon source. The Na3V2(PO4)2F3/C has obvious redox peaks, determined by cyclic voltammetry (CV), at 3.90 V and 3.75 V, 4.32 V and 4.15 V. These two pairs of redox peaks correspond to the escape/intercalation of the two pairs of Li+/Na+. Notably, compared with pure Na3V2(PO4)2F3, the specific discharge capacity of Na3V2(PO4)2F3/C-20%, which were used as a cathode material for lithium–sodium hybrid ion batteries, increased from 55 mA h g−1 to 125 mA h g−1, which was an improvement of twofold.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2025
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IF 7
Shaokang Guo,Jian Peng,Neeraj Sharma,Jiaqi Pan,Yi Liao,Xinhao An,Hanchi Li,Zhisong Ge,Chunliang Zhou,Wen Liang Tan,Junnan Liu
Na3V2(PO4)2F3 (NVPF) has been considered as a promising NASICON-type (sodium superionic conductor) cathode material for sodium-ion batteries (SIBs). However, their development has been limited by poor electronic conductivity. To address this issue, a series of Sc-doped carbon-coated Na3V2–xScx(PO4)2F3/C, x = 0, 0.02, 0.04, 0.06, 0.08, and 0.1 were synthesized by the sol–gel method. Sc is found to partially stabilize the crystalline framework, reduce deformation during Na+ insertion/extraction, and reduce polarization, which in turn impacts the diffusion of Na+ ions in the crystal lattice. The optimized NVPF has good electronic conductivity and cycling stability; in particular, the NVSPF/C-0.04 electrode exhibits the highest discharge specific capacity (125 mAh g–1 at 0.2 C), excellent rate performance (87 mAh g–1 at 30 C), and outstanding cycling performance (90% capacity retention after 1000 cycles at 10 C and 94% capacity retention after 100 cycles at 1 C). Density functional theory shows that the Sc-doping effectively improves the electronic conductivity of the NVPF. In situ and operando synchrotron XRD data show that the NVSPF/C-0.04 electrode undergoes phase transitions during charge/discharge at 0.2 and 2 C and indicates the reason for the capacity decay at 5 C. Finally, the NVSPF/C-0.04//HC (hard carbon) full cell performs with a good discharge specific capacity (112 mAh g–1 at 1 C). This study presents a feasible approach to developing high-performance cathode materials that can be used in SIBs, and it holds great potential for the future advancement of SIBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2018
·Vol. 165
·期 5
·A746
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IF 3.662
Hougao Xiong,Yutao Liu,Yifu Yang,Huixia Shao
A carbon-polytetrahydrofuran double-coated Na3V2(PO4)2F3 composite has been prepared by synthesis of carbon coated Na3V2(PO4)2F3 followed by in situ polymerization of tetrahydrofuran on its surface. Thermal gravimetry analysis, Fourier transform infrared spectrum and high-resolution transmission electron microscopy are used to confirm the encapsulation structure of the inner carbon layer and the outer polytetrahydrofuran layer on Na3V2(PO4)2F3. Electrochemical tests show that electrochemical performance and electronic conductivity of the composite are significantly improved due to the polytetrahydrofuran coating, and a reversible capacity of 123.6 mAh g−1 at a moderate 2 C rate is obtained with a high capacity retention of 98.5% after 250 cycles. Even at an extremely high rate of 10 C the discharge capacity is still as high as 115.8 mAh g−1 with a capacity retention of 80% over 400 cycles. Interestingly, sodium ion distribution in augmented triangular prismatic sites of Na3V2(PO4)2F3 is not unchanged, but shifts from the high energy Na(2)' site to the low energy Na(3)' site after a certain cycle, thus Na3V2(PO4)2F3 could obtain a higher energy density. The full cell coupled with the composite cathode and Na metal anode constructed with Na-Sn alloy substrate exhibits excellent rate discharge capability and good cycling stability. The nano-level carbon-PTHF double-coating developed in this work could provide a new way to improve Na+-storage and rate performance of Na-based materials.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Junjie Ma,Wei Li,Xiaoqi Lan,Zheng Liu,Fenghai Zhou,Mingjun Lu,Guo-Cheng Han
The Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite was prepared based on nitrogen-doped porous carbon materials containing cobalt (Co/N-PC), which is obtained through high-temperature pyrolysis of bimetallic Co/Zn-MOF. The electrochemical test results showed that the discharge specific capacity of Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite was 126.66 mAh/g at 0.1C, an increase of 15.6 % compared with Na 3 V 2 (PO 4 ) 2 F 3 /N-PC(109.56 mAh/g). The capacity retention rate was 91.84 % after 100 cycles and the R SEI of the Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite (48.62 Ω) outperforms that of the Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite (81.55 Ω). This work applied the metal/carbon hybrid materials obtained through high temperature pyrolysis of bimetallic organic frameworks were employed in sodium-ion batteries, thereby offering enhanced potential for the advancement of sodium-rich phosphoric acid modified materials.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2023
·
IF 5.9
Min Liang,Wenya Li,Yuanqi Yang,Huizi Li,Jinji Liang,Chenhan Lin,Xiangcong Meng,Jun Liu,Zhicong Shi,Liying Liu
Smart wearable electronic devices are becoming more prevalent in our daily life, exceedingly arousing the increasing demand for flexible energy storage devices. Herein, a sodium superionic conductor (NASICON)-structured Na3V2(PO4)2F3 (NVPF) self-standing cathode is fabricated via an electrospinning technique. NVPF particles at the nanoscale are encapsulated in or attached to the surface of carbon nanofibers to form an NVPF self-standing cathode, which exhibits a high-voltage platform of ∼4.07 V with a reversible capacity of 101.8 mAh g–1 at 0.2C and 98.3% capacity retention after 400 cycles. Moreover, the soft package full battery, assembled with an NVPF self-standing cathode and a Na3V2(PO4)3 (NVP) anode, can light up a light-emitting diode in the folded/unfolded states. The superior sodium storage performance was enabled by the stable structure of the NVPF self-standing cathode. Moreover, the nitrogen-doped carbon nanofiber network of the NVPF self-standing cathode not only ensures the flexibility but also facilitates electron and Na+ transportation. This work provides an NVPF self-standing cathode with excellent mechanical and electrochemical performance for high-voltage flexible sodium-ion batteries, which is beneficial for promoting the practical application of high-voltage flexible sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2024
·
IF 4.3
Fenghai Zhou,Wei Li,Junjie Ma,Shaocong Wang,Mingjun Lu,Zheng Liu,Guo-Cheng Han
N-doped porous carbon material (N-PC) was generated through high-temperature cracking, using ZIF-8 as a template, and preparation of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composites were designed and prepared as cathode materials for sodium-ion batteries, and the electrochemical sodium storage performance was systematically investigated. The physical characterization results showed that the addition of N-PC played a role in increasing the electrical conductivity of Na 3 V 2 (PO 4 ) 2 F 3 material and improving the specific surface area. The electrochemical test results showed that the discharge specific capacity of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite was 109.56 mAh/g at 0.1C, and the capacity retention rate was 85.10 % after 100 cycles, and the R SEI of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite (81.55 Ω) is better than that of Na 3 V 2 (PO 4 ) 2 F 3 pure-phase material (142.5 Ω), which indicates that the ion transfer impedance of the modified material has been effectively reduced, and the ion de-embedding is more fluent.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Xiaoli Yi,Hongyue Luo,Yongmao Zhou,Shihao Feng,Jiexi Wang,Zhixing Wang,Jianguo Duan,Ding Wang,Huajun Guo,Guochun Yan
Na 3 V 2 (PO 4 ) 2 F 3 is considered as one of the most promising cathode materials for sodium-ion batteries (SIBs). However, the low electronic conductivity of this material severely restricts its electrochemical performance. Herein, Cr-doped Na 3 V 2 (PO 4 ) 2 F 3 /C material was synthesized by a simple sol-gel method, and the effects of Cr 3+ doping on the structure, morphology and electrochemical performance were systematically investigated. The optimized material Na 3 V 2-x Cr x (PO 4 ) 2 F 3 /C (x = 0.05) exhibits high initial discharge capacity of 101.9 mAh g −1 at 10 C and keep a capacity retention of 68.7 % after 1000 cycles. The improved electrochemical performance can be attributed to the higher crystallinity, improved intrinsic electronic conductivity and sodium ion diffusion coefficient due to the doped Cr 3+ , which accelerates the electron transport and charge transfer rate. The optimized Cr-doped Na 3 V 2 (PO 4 ) 3 F 3 /C material obtained in this work can promote the practical application of Na 3 V 2 (PO 4 ) 3 F 3 cathode.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Meng Wang,Yingshuai Wang,Yuhang Xin,Qi Liu,Feng Wu,Hongcai Gao
Na super ionic conductor (NASICON)-type Na3V2(PO4)2F3 (NVPF) has been regarded as a prospective candidate of cathode materials for sodium-ion batteries due to its excellent structural stability, relatively high capacity and working voltage. However, the poor cyclability and rate capability, resulting from its low intrinsic electronic conductivity, have become a serious obstacle to their practical large-scale application. In this work, N-doped carbon coated NVPF composites (NVPF@NC) were successfully synthesized via a simple sol–gel method, in which low-cost polyvinylpyrrolidone was introduced as a nitrogen source. After high-temperature pyrolysis, a highly conductive N-doped carbon layer was in-situ constructed on the particle surface to enhance the sodium storage performance of NVPF. The optimized NVPF@NC cathode delivered high reversible capacity, excellent rate capability and long-term cycle life compared to pristine NVPF@C. The remarkable electrochemical performance of NVPF@NC cathode benefits from the modification strategy of introducing a heteroatom-doped carbon layer, triggering the formation of extrinsic defects and active sites in the N-doped amorphous carbon layer, which greatly enhances the electrical conductivity and the diffusion rate of sodium ions. This work provides a facile and effective approach for the preparation of N-doped carbon coated NVPF with remarkable sodium storage properties, which could be extended to other electrode materials electrochemical for energy storage.
研究领域:
材料科学
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能量存储
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
·
IF 7.9
Shi-Zhong Lv,Li-Rui Liu,Yin-Qi Zheng,Jian Liu,Yu-Wei Wang,Jing-Jing Hou,Zao-Hui He,Ai-Min Lv,Liang Deng,Lei Zhao,Zhen-Bo Wang
Polyanionic Na 3 V 2 (PO 4 ) 2 F 3 is widely recognized as a promising cathode material for sodium ion batteries due to its high operating voltage. However, two critical challenges hinder its application: the formation of intergrowth structures owing to fluorine loss and the sluggish charge-transfer process resulting from the highly electronegative anions. Herein, Na 3 V 2 (PO 4 ) 2 F 3 with micro-nano structured morphology is obtained via a spray-drying method, which shortens diffusion pathways and enhances Na + transport kinetics. Besides, the fluorine chemistry of the cathode is regulated to optimize the atomic structure and electronic properties, whereby ensuring the formation of [V 2 O 8 F 3 ] bioctahedral framework while improving the electronic conductivity by narrowing the band gap and delocalizing the electron. As a result of optimized Na + /e − transfer kinetics and strengthened framework structure, the fluorine-compensated Na 3 V 2 (PO 4 ) 2 F 3 exhibits outstanding cycling durability (82.8 % capacity retention after 3000 cycles) and high-rate capability (74.7 mAh g −1 at 30 C). Particularly, the Na 3 V 2 (PO 4 ) 2 F 3 cathode exhibits remarkable temperature adaptability to the high environment (60 °C) and cold conditions (−20 °C). Moreover, the Na 3 V 2 (PO 4 ) 2 F 3 ||hard carbon full cell delivers a high energy density (434.9 Wh kg −1 ), further highlighting its great potential as a practical cathode material. This work may support the application of Na 3 V 2 (PO 4 ) 2 F 3 cathode for long-term durable sodium-ion batteries.
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jie Wang,Qiming Liu,Shiyue Cao,Huijuan Zhu,Yilin Wang
Na 3 V 2 (PO 4 ) 2 F 3 (NVPF), recognized for its Na superionic conductor architecture, emerges as a promising candidate among polyanion-type cathodes for sodium ion batteries (SIBs). However, its adoption in practical applications faces obstacles due to its inherently low electronic conductivity. To address this challenge, we employ a binary co-doped strategy to design Na 3.3 K 0.2 V 1.5 Mg 0.5 (PO 4 ) 2 F 3 cathode with nitrogen-doped carbon (NC) coating layer. This configuration enhances electronic conductivity and reduces diffusion barriers for sodium ion (Na + ). The strategy of incorporating nitrogen-doped carbon coating not only facilitates the formation of a porous structure but also introduces additional defects and active sites. Such modifications accelerate the reaction kinetics and augment electrolyte interaction through an expanded specific surface area, thus streamlining the electrochemical process. Concurrently, strategic heteroatom substitution leads to a more efficient engagement of Na + in the electrochemical activities, thereby bolstering the cathode's structural integrity. The vanadium fluorophosphate Na 3.3 K 0.2 V 1.5 Mg 0.5 (PO 4 ) 2 F 3 @NC exhibits an electrochemical performance, including a high discharge specific capacity of 124.3 mA h g −1 at 0.1C, a long lifespan of 1000 cycles with a capacity retention of 93.1 % at 10C, and a rate property of 73.2 mA h g −1 at 20C. This research provides a method for preparing binary doped NVPF for energy storage electrochemistry.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）