CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shiqi Sun,Yanjun Chen,Jun Cheng,Zeyi Tian,Chao Wang,Guangping Wu,Changcheng Liu,Yanzhong Wang,Li Guo
Na 3 V 2 (PO 4 ) 3 (NVP) has gained enormous attentions due to the high capacity and voltage platform. Nevertheless, poor intrinsic electronic conductivities severely restrict the further development. Herein, a feasible strategy to construct unique dimensional gradient structure of the wolfram doped NVP is proposed via a facile sol–gel method. The introduction of W 6+ with the smaller ionic radius parallelized with local V 3+ ions could stabilize the open NASICON structure of NVP and generate vast of beneficial holes to accelerate the electronic transportation. Notably, the wolfram can combine with the superfluous carbon layer and form the new conductive WC phase to further promote the electronic conductivity. Meanwhile, the coated carbon layers and enwrapped CNTs construct an effective conductive framework for accelerated electronic migration. The twining CNTs promote to inhibit the growth of the sintered grains, reducing the particle size to provide shortened pathway for the migration of Na + . Distinctively, the modified Na 2.97 V 2.99 W 0.019 (PO 4 ) 3 /C@CNTs (W0.01-NVP) composite delivers a superior electrochemical performance. Significantly, it can submit a high reversible capability of 112.5 mAh g −1 at 5C with retaining 86% initial capacity over 500 cycles. As for a super high rate of 50C, it reveals an incredible capacity of 92.6 mAh g −1 and remains 84.5 mAh g −1 over 400 cycles, corresponding to a high retention of 91.30%. The superior electrochemical performance is derived from the enhanced crystal structure resulted from wolfram substitution and the beneficial dimensional conductive system consisting of new WC phase, coated carbon layers and enwrapped CNTs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米科技
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lanlan Yu,Ningning Liu,Baojun Liu,Fei Yu,Jie Ma
Cathode materials with high capacity and cyclic durability are urgently needed for capacitive deionization . Na 3 V 2 (PO 4 ) 3 is an emerging pseudocapacitive candidate for this process on account of its high capacity and Na + reversible insertion, while it suffers from the intrinsic low electrical conductivity and small electrolyte-accessible surface area. Herein, a sea urchin-like Na 3 V 2 (PO 4 ) 3 @carbon (NVP@C) compound material was synthesized from MXene-V 2 C via hydrothermal method followed by annealing treatment, and then assembled as capacitive deionization (CDI) electrode material . Benefiting from three-dimensional sea urchin-like structure, where the nanoneedles of NVP@C serve as fast transport channel for Na + , NVP@C performed high specific capacity (437 F g −1 at 5 mV s −1 ) and fast ionic diffusion kinetics. Moreover, the NVP@C showed attractive desalination performance as cathode material for CDI, achieving a remarkable adsorption capacity of 74.0 mg g −1 in a NaCl salt solution (1000 mg L −1 ) and long life cycle stability. The present work provides a novel perspective to construct practical redox-active and stable CDI electrode with 3D structure from MXene for highly capacitive and durable desalination application .
研究领域:
材料科学
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电化学
·
环境工程
·
能源存储
·
纳米材料
·
水处理技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shiqi Sun,Yanjun Chen,Qiang Bai,Zhen Tian,Que Huang,Changcheng Liu,Shengnan He,Yaxiong Yang,Yanzhong Wang,Li Guo
Researchers are accustomed to utilizing traditional solid-state and sol–gel routes to synthesize Na 3 V 2 (PO 4 ) 3 (NVP). No regulation mechanism is proposed to illustrate the growth process of NVP in solvothermal environment. In current work, uniform spherical particles with positive charge are synthesized by molecular self-assembly of nanosphere micelles using structural guiding agent polyethylene glycol (PEG) and surfactant Cetyltrimethylammonium bromide (CTAB). Nanoflower-shaped NVP sample is successfully prepared in the 100 % methyl alcohol medium, derived from the plate V 2 O 5 (negative charge) combining with the nuclear nanospheres (positive charge) with the induction of electrostatic attraction. Based on the multi-dimensional tests and molecular dynamic calculation, the protective mechanism of polar solution for NVP system is proposed for the first time, that is, methanol solvent system can better protect the morphological features of NVP than water environment to maintain the original special nanoflower morphology. Due to the distinctive and stabilized nanoflower construction, the optimized NVP60 sample can provide more extra active sites for the efficient de-intercalation of Na + and possess a large contacting area with electrolyte, resulting in the facilitated kinetic characteristics and superior electrochemical performance. The optimized NVP60 cathode possesses superior sodium storage property in both half cell and full cell. This work proposes a synergetic strategy combining theory and experiment to design and synthesize the modified NVP-based cathode materials from the molecular bonding aspect, further promoting the development of high performance cathode for SIBs.
研究领域:
材料科学
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电化学
·
纳米材料
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能源存储
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无机化学
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计算材料学
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电池技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Xuemei Li,Shijian Wang,Xiao Tang,Rui Zang,Peng Li,Pengxin Li,Zengming Man,Cong Li,Shuaishuai Liu,Yuhan Wu,Guoxiu Wang
Sodium super-ionic conductor (NASICON) structured Na 3 V 2 (PO 4 ) 3 (NVP), a promising cathode material for sodium-ion batteries (SIBs), benefits by its unique three-dimensional (3D) channel structure. However, the inherent characteristics of NVP (such as low electrical conductivity) usually lead to inferior rate and long-cycling performance, which miss the requirements of practical application in electrical energy storage systems (ESSs). Herein, we propose the synthesis of porous high-crystalline Na 3 V 2 (PO 4 ) 3 /C nanoplates (NVP/C-P) via hydrothermal method and post-calcination. The porous nanoplate structure provides increased specific surface area and shortened diffusion pathway for ion/electron transport. Consequently, NVP/C-P cathodes exhibit a high specific capacity (117 mAh g −1 , 0.2 C), exceptional rate performance (76.5 mAh g −1 , 100 C) and long cyclic stability (10,000 cycles).
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 11
·4743-4754
·
IF 3.3
Zhenbo Peng,Bifen Chen,Shan Yu,Kaiyu Wu,Farao Zhang,Peng Gao
Na3V2(PO4)3 (NVP) suffers from poor ionic and electronic conductivity. Herein, a dual-optimized design with Cu2+ doping and wrapping in tubular carbon nanotubes (CNTs) is proposed for the first time. This strategy not only modifies the internal electronic structure but also regulates the morphological features of NVP material. Notably, Cu2+ occupying V3+ sites introduces favorable p-type doping effects. Consequently, newly generated holes can act as charge carriers to improve electronic conductivity. Meanwhile, to conserve the charge balance of the whole system, a series of distinctive Na3+xV2−xCux(PO4)3 cathode materials are designed. The Na-rich scheme maintains charge integrity, as well as supplying more active Na+ to take part in the reversible de-intercalation process. Due to the larger ionic radius of Cu2+, Cu2+ doping plays a great role as a pillar to support the crystal skeleton and then expand the Na+ migration channels, thus significantly elevating the ionic transport rate. Furthermore, moderate CNTs are wrapped around the active grains, functioning together with coated carbon layers to construct a highly conductive framework, enhancing electronic transfer. Meanwhile, the tubular CNTs and porous morphology effectively increase the contact areas between active particles and electrolyte, providing more active sites. Furthermore, in situ EIS measurement demonstrates that a stable SEI membrane covers the cycled Na3.07V1.93Cu0.07(PO4)3@CNTs grains to maintain electrode stability and prevent the occurrence of side-effects. Comprehensively, the Na3.07V1.93Cu0.07(PO4)3@CNTs sample releases 124.2 mA h g−1 at 0.1 C. It releases 101.9 and 98.6 mA h g−1 at 10 and 50 C, suggesting superior rate capability.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Ma Junjie,Li Wei,Yang Deyi,Liu Zheng,Cao Yuyuan,Wang Shaocong,Han Guo-Cheng,Chen Qizhi
N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites were prepared by sol–gel method combined with high-temperature calcination at 625 °C. Electrochemical tests show that the initial discharge specific capacity of N-RGO/Na 3 V 2 (PO 4 ) 3 -modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites is 149.27 mAh·g −1 at a current density of 0.05 C, and the discharge specific capacity can be maintained at approximately 101.89 mAh·g −1 after 100 cycles. This accounts for 68.26% of its initial discharge specific capacity. Rate performance tests showed that after cycling the current density back to 0.2 C, it was still able to recover to a discharge specific capacity close to 119 mAh·g −1 . At the same time, the interfacial properties of the N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites were studied, and it was found that the capacity attenuation was due to irreversible structural changes such as agglomerated block cracking and structural collapse during multiple cycles, as well as the gradual thickening of the SEI film with the increase in cycle times. This study aims to apply N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites to cathode materials for sodium-ion batteries, providing a theoretical basis for the development of fluorinated poly-anion compounds.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Hong-bo Huang,Shao-hua Luo,Cai-ling Liu,Yue Yang,Yu-chun Zhai,Long-jiao Chang,Ming-qi Li
Na super ionic conductor (NASICON)-type Na 3 V 2 (PO 4 ) 3 (NVP) has been considered as a potential positive electrode material for sodium ion batteries (NIBs) owing to its high theoretical specific capacity. Nonetheless, the practical application of NVP is hindered by the intrinsically poor electronic conductivity. Herein, polydopamine-derived nitrogen-doped carbon-covered Na 3 V 2 (PO 4 ) 3 /C composites (NVP/C/NC) have been prepared through a self-polymerization of dopamine on the NVP/C surface and subsequent calcination at high temperature. The as-synthesized NVP/C/NC composite cathode exhibits a high initial reversible capacity (109.2 mAh/g at 0.2C), superior rate performance (87.2 mAh/g at a rate up to 20C), and excellent cycling capability (91.2% of the initial capacity is kept after 500 cycles at 2C) in NIBs. Furthermore, compared with NVP/C electrode, the NVP/C/NC electrode presents low resistance and high sodium ions diffusion coefficient . The good performance can be ascribed to the nitrogen-doped carbon layer in improving the electronic conductivity, shortening diffusion length of Na + ions and electrons, and relieving the volume changes of electrode materials. These preliminary results suggest that the as-obtained NVP/C/NC composite is a novel promising electrode material for low-cost sodium energy storage.
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DOI
高影响因子
Metals
·
2024
·Vol. 14
·期 12
·1453
·
IF 2.6
Bo Pei,Xin Qiao,Que Huang,Changcheng Liu,Mengna Shi,Xiaomei Jiang,Feng Li,Li Guo
Na3V2(PO4)3(NVP) is considered to be a promising cathode material for sodium-ion batteries (SIBs). Ion doping can effectively improve its structural deformation, poor conductivity, and electrochemical performance. However, the research on the effect of ion doping on the thermal stability of NVP is still limited. In this paper, Mg/Ti co-doped and Mn/Ti co-doped modified NVP with carbon nanotubes (CNTs) (MgTi@ CNTs and MnTi@CNTs) were prepared, respectively, and X-ray diffraction (XRD) results proved that MgTi@CNTs and MnTi@CNTs have good structural stability and crystallinity. The electrochemical performance indicates that the dual strategy ofp-n-type co-doping and CNT coating provides superior sodium storage performance, enhancing both electronic conductivity and ion diffusion. Secondly, based on the safety point of view, the thermal stability ofp-n-type ion-doped NVP and its mixed system with electrolyte in a charged state was studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and accelerated calorimeter (ARC). The results show that the optimized MgTi@CNTs and MnTi@CNTs electrodes exhibit excellent thermal stability in the absence of electrolytes, indicating their high intrinsic safety. However, it is worth noting that in the electrode/electrolyte system,p-n-type ion-doped NVP have higher reactivity with the electrolyte, and their comprehensive thermal safety is lower than that of NVP. Therefore, in practical applications, it is necessary to comprehensively consider the thermal stability of the material and the thermal safety of its mixed system with the electrolyte. This paper provides a data basis for the practical application of NVP in SIBs.
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产品关联
DOI
高影响因子
INTEGRATED FERROELECTRICS
·
2021
·
IF 0.836
Ji Yan,Zhen Li,Xiao-Kai Ma,Xin-Bo Chang,Fu-Jun Liu,Yong Zhang,Li-Zhen Wang
NASICON Na3V2(PO4)3 was investigated as cathode material in hybrid ion batteries using Li as counter and LiPF6 as electrolyte. The highly efficient and homogeneous heating merits of microwave irradiation facilitates the Na3V2(PO4)3 achieving excellent crystal structure, uniform carbon coating, as well as ideal particle size. After microwave irradiation, a specific capacity of 96.5 mAh g−1 is obtained for the first intercalation of lithium ion into Na3V2(PO4)3 at 0.1 C rate. For long-term cycling stability, the capacity retention reaches 84.4% at 5 C rate after 500 cycles. The unique intercalation/extraction characteristic promises Na3V2(PO4)3 an ideal candidate material for next-generation hybrid ion storage system.
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 2
·620-625
·
IF 3.119
Xianying Fan,Xiaoyu Gao,Xuan Zhang,Guijia Cui,Huichao Lu,Zhixin Xu,Jun Yang
We report a low-cost hydrogel electrolyte by adding 3 wt% poly(acrylate sodium) (PAAS) into 1 M Na2SO4 aqueous electrolyte, which achieves a widened electrochemical stability window (ESW) of 2.45 V on stainless steel current collector from 2.12 V in 1 M Na2SO4 aqueous electrolytes (AE). Moreover, the H2 evolution potential reaches −1.75 V vs. Ag/AgCl on titanium current collector. The results reveal that the polymer network structure of PAAS has the ability to interact with water molecules and thus the hydrogen evolution reaction can be limited effectively, which broadens the ESW of aqueous electrolyte and allows the reversible Na-ion intercalation/deintercalation of Na3V2(PO4)3 as an anode material in aqueous electrolyte reported for the first time.
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 1
·205-213
·
IF 2.606
Zhao Qian,Yang Wensheng,Zhang Qin,Qiu Liren,Zhou Min,Lu Shengshang,Tao Benfu,Wang Xinhai,Xie Quan,Ruan Yunjun
Sodium super ion conductor (NASICON) structure materials, known for fast diffusion channels for Na + , are promising solid electrolyte materials for sodium-ion batteries (SIBs). However, the high carbon content in the NASICON electrolyte materials originated from the carbothermal reduction (CR) reaction will cause short-circuit and self-discharge of the batteries. Herein, we developed a facile and straightforward two-stage calcining strategy to prepare Na 3 V 2 (PO 4 ) 3 (NVP) with high purity and crystallinity. By precisely controlling the dosage of reducing agent and heat temperature, the purity of NVP can reach 99.97%. Moreover, the NVP film was prepared by the as-synthesized pure NVP powder via fast hot-pressing sinter, whose Vickers hardness is (5.0 ± 0.4) × 10 2 HV and relative density is 99.05%. This study provides a safe and facile strategy to prepare high-purity NVP powder and high-quality NVP films, which is of great significance in exploring NVP as a solid electrolyte for SIBs.
Graphical abstract
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DOI
高影响因子
Carbon Energy
·
2025
·
IF 24.2
Pengcheng Wang,Xuqi Lin,Houlin Cheng,Ciqi Yuan,Yongping Zheng,Yingbin Lin,Zhigao Huang,Hao Chen,Jiaxin Li
Na 3 V 2 (PO 4 ) 3 (NVP) is a promising electrode material that exhibits magnetic anisotropy; however, the potential of this magnetic anisotropy to optimize battery performance has been largely unexplored. This study proposes a cost-effective and efficient method to induce the alignment of NVP along the (113) crystal plane by applying a vertical magnetic field during the slurry coating process, thereby enhancing its battery performance. Comprehensive structural characterizations and theoretical analysis elucidate the structure-activity relationship between the preferred crystal orientation and ion transport kinetics, facilitating the formation of more ordered Na + deintercalation pathways in NVP electrodes. This alignment reduces electrode tortuosity, enhances interfacial compatibility, and substantially improves battery performance, particularly in terms of high-rate cycling capability. As a result, the magnetic-field-modulated NVP (NVP−M⊥) electrode exhibits a high capacity retention of 85.1% after 500 cycles at 5 C, significantly surpassing that of the pristine electrode. The NVP−M⊥ electrode also demonstrates considerable reversible capacity at 40 C and maintains excellent stability under high temperature and prolonged cycling conditions. Furthermore, superior battery performance is observed in the assembled NVP−M⊥||hard−carbon pouch cell and commercial NVP electrode following magnetic-field modulation, thereby validating the efficacy of this method. Consequently, this magnetic-field-induced crystal-orientation optimization strategy provides an innovative approach for low-cost and high-throughput preparation of high-performance sodium-ion batteries.
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DOI
高影响因子
危险品化学品经营许可证（带存储）