JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 14
·19901-19911
·
IF 2.478
Wang Fei,Liu Xiaoyu,Liu Zhuang,Wang Yanming
The large-scale application of Li-ion batteries requires high-performance cathode materials. Herein, a high-activity Li 3 V 2 (PO 4 ) 3 /C composite cathode has been fabricated through a solid-state reaction employing dual carbon sources of poly(acrylic acid) and soluble starch. The effects of single carbon source and dual carbon sources on the physical and electrochemical properties of Li 3 V 2 (PO 4 ) 3 /C are analyzed. The porous structure induced by poly(acrylic acid) and highly conductive carbon resulted from soluble starch enable the composite to achieve large discharge capacities and stable cyclability at high C-rates. At 3.0–4.3 V and 10 C, a large discharge capacity of 121 mAh g −1 (nearly 91% of the theoretical capacity) can be obtained, along with high capacity retention of 88% over 1000 cycles. Furthermore, at 3.0–4.8 V, the composite also possesses larger high-rate capacities and better cyclability than other composites prepared using single carbon source. The dual carbon sources bring a synergistic effect to the enhancement of electrochemical performances of the Li 3 V 2 (PO 4 ) 3 /C composite.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Nan Jiang,Long Chen,Yitao Wang,Hao Jiang,Yanjie Hu,Chunzhong Li
Sodium-ion batteries have been extensively studied due to their high safety and high natural abundance characteristics. Na 3 V 2 (PO 4 ) 3 (NVP) cathode materials, which have extraordinary rate performance and cycle stability, have become among the most promising cathode materials for commercialization. However, due to their low conductivity problem, it is still a serious challenge to develop a nanocrystalline and uniform conductive frame structure. This work reports a confinement reaction strategy derived from the chelation reaction, which can successfully realize electrode materials with adjustable internal NVP grains. The obtained ultrasmall grained carbon frame material showed to have ultrahigh rate performance, and it could reach 101 mAh g −1 at 100C and 100 mA h g −1 after 1800 cycles at 10C rate (capacity retention rate 99%). Moreover, it showed the characteristics of excellent low-temperature performance, and no capacity degradation at − 20 °C after 1000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shuting Zhao,Wentao Qi,Chao Yang,Rui Ling
Na 3 V 2 (PO 4 ) 3 has received a lot of attention as a prospective cathode for sodium-ion batteries (SIBs) owing to its strong 3D wide-open architecture for Na + transport. However, the practical application is still hampered by its poor electronic conductivity and weak Na + diffusion kinetics . In this paper, a novel Mg 2+ -doped Na 3 V 2 (PO 4 ) 3 flower-like cathode (Na 3+x V 2-x Mg x (PO 4 ) 3 /C, x = 0, 0.02, 0.04, 0.06) with abundant mesoporous has been synthesized by a convenient template-assisted sol-gel method. Mg 2+ doping successfully triggers V 4+ /V 5+ reversible redox with improved voltage plateau and reversible capacity. The hierarchical mesoporous structure combined with carbon layers is beneficial to the fast transport of Na + and e − , which guarantee improved kinetic properties and enhanced conductivity. Attributed to these competitive advantages, significantly improved electrochemical properties of Na 3.04 V 1.96 Mg 0.04 (PO 4 ) 3 /C (NVMP-4) are acquired, including extremely high specific capacity (123.8 mAh g −1 at 1C), excellent rate performance (73.8 mAh·g −1 at 100C) and exceptionally stable energy output with 89.1 % capacity retention after 3000 cycles at 20C. Additionally, when assembled with a hard carbon anode (HC), NVMP-4||HC provides an exceptional energy density of 216.9 Wh kg −1 at 0.2C. By enhancing nanostructure and rational surface engineering, this project offers fresh perspectives for creating superior electrodes, increasing the energy density of SIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 36
·18718-18726
·
IF 7.443
Gongzheng Yang,Huawei Song,Mingmei Wu,Chengxin Wang
Besides targeting low-voltage intercalation, NaTi2(PO4)3 (NTP) is a promising negative electrode material for non-aqueous sodium-ion batteries (SIBs). However, the low electronic conductivity of this material inhibits its potential applications. Herein, we report the controllable synthesis of four interesting porous NTP nanocubes via a one-pot solvothermal method. The as-synthesized products have shown excellent high-rate performance and cycling stability as SIB anodes. After 10 000 cycles at a 10C rate, 75.5% of the initial capacity is retained, which exceeds those of most of the reported SIB anode materials. Even at an extremely high rate of 100C, the NTP nanocubes can still deliver considerable reversible capacities after deep charging/discharging for 15 000 cycles. The superior electrochemical performances can be attributed to their unique nanostructures. We hope that such a finding of the new construction will enrich the NTP system and provide several possible candidates for SIB anodes.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Guijia Cui,Qingyu Dong,Zhuangzhou Wang,Xiao-Zhen Liao,Siqi Yuan,Meidan Jiang,Yanbin Shen,Hong Wang,Haiying Che,Yu-Shi He,Zi-Feng Ma
NASICON-type (Na super ionic conductor) Na 4 VMn(PO 4 ) 3 (NVMP) cathode material has attracted increasing attention due to its higher sodium de-/intercalation voltage, lower cost and greener resources compared with Na 3 V 2 (PO 4 ) 3 . However, the poor electronic conductivity limits the exploitation of its electrochemical performance. In this work, we achieved an ultrahigh rate capable and long cycle life NVMP/C-rGO composite using the simple and scalable spray-drying technique, in which low-fraction rGO nanosheets (2.14 wt%) highly dispersed and bridged the carbon shelled NVMP nanoparticles to form an effective electron conductive network. Benefiting from this favorable nano-architecture, the elaborately designed NVMP/C-rGO composite exhibited excellent performance as cathode in sodium ion batteries, delivering reversible capacities of 105.5 mA h g −1 at 1 C (1 C = 110 mA h g −1 ) and 102.6 mA h g −1 at 50 C with capacity retention of 90.6% (1 C) and 80.4% (50 C) over 500 cycles, respectively. This is the highest rate performance for Na 4 VMn(PO 4 ) 3 materials reported so far. This work provides a practicable tactic for fabricating advanced polyanion-type cathode materials which can be commercially scale up for sodium energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·1969
·
IF 3.2
Ruixia Chu,Hongtao Zhang,Wanyou Huang,Fangyuan Qiu,Yan Wang,Zhenyu Li,Xiaoyue Jin
Lithium-ion batteries (LIBs) with high power, high capacity, and support for fast charging are increasingly favored by consumers. As a commercial electrode material for power batteries, LiFePO4was limited from further wide application due to its low conductivity and lithium-ion diffusion rate. The development of advanced architectures integrating rational conductive networks with optimized ion transport pathways represents a critical frontier in optimizing the performance of cathode materials. In this paper, a novel self-supporting cathode material (designated as LFP@LVP-CES) was synthesized through an integrated coaxial electrospinning and controlled pyrolysis strategy. This methodology directly converts LiFePO4, Li3V2(PO4)3, and polyacrylonitrile (PAN)) into flexible, binder-free cathodes with a hierarchical structural organization. The 3D carbon nanofiber (CNF) matrix synergistically integrates LiFePO4(Li/Fe/POx) and Li3V2(PO4)3(Li/V/POx) nanoparticles, where CNFs act as a conductive scaffold to enhance electron transport, while the POxpolyanionic frameworks stabilize Li+diffusion pathways. Morphological characterizations (SEM and TEM) revealed a 3D cross-connected carbon nanofiber matrix (diameter: 250 ± 50 nm) uniformly embedded with active material particles. Electrochemical evaluations demonstrated that the LFP@LVP-CES cathode delivers an initial specific capacity of 165 mAh·g−1at 0.1 C, maintaining 80 mAh·g−1at 5 C. Notably, the material exhibited exceptional rate capability and cycling stability, demonstrating a 96% capacity recovery after high-rate cycling upon returning to 0.1 C, along with 97% capacity retention over 200 cycles at 1 C. Detailed kinetic analysis through EIS revealed significantly reduced Rctand increased Li+diffusion. This superior electrochemical performance can be attributed to the synergistic effects between the 3D conductive network architecture and dual active materials. Compared with traditional coating processes and high-temperature calcination, the preparation of controllable electrospinning and low-temperature pyrolysis to some extent avoid the introduction of harmful substances and reduce raw material consumption and carbon emissions. This original integration strategy establishes a paradigm for designing freestanding electrode architectures through 3D structural design combined with a bimodal active material, providing critical insights for next-generation energy storage systems.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 12
·期 1
·217-230
·
IF 6.1
Jinggao Wu,Canyu Zhong,Xiaofan Chen,Jing Huang
Li3V2(PO4)3 (LVP) coated with N and S co-doped carbon (NSC) was investigated by DFT calculation, suggesting that NSC significantly enhances electronic conductivity and lowers the energy barrier to Li+ migration in comparison to LVP-embedded in pristine carbon. To experimentally confirm the theoretical prediction, three types of LVP particle embedded in N and S co-doped porous carbon (LVP@NSC) materials with various nitrogen and sulfur molar ratios (N : S = 1 : 1, 1 : 2 and 2 : 1) were prepared by a facile freeze-drying-assisted wet chemical route associated with a post-annealing process. When used as a cathode for a lithium-ion battery (LIB), the designed LVP@NSC with N : S = 1 : 2 exhibits outstanding high rate capacities of 124.4 and 107.85 mA h g−1, respectively, at 2 and 20 C in a voltage window of 3.0–4.3 V, and an ultralong cycling stability of 500 times at 20 C while retaining a reversible capacity of 100.22 mA h g−1, possibly due to its smallest charge transfer resistance and highest Li+ migration coefficient, which is in good agreement with the theoretical prediction. This work not only reveals the critical role of an interaction mechanism between NSC and LVP, but also offers great potential for high-energy density LIB applications.
研究领域:
材料科学
·
电化学
·
计算化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lu Sai,Zhongsheng Dai,Zhenbo Wang,Huiling Zhao,Ying Bai
Li-rich layered oxides with high energy densities have become one kind of promising cathode for advanced lithium-ion batteries, however some issues are severely hindering their practical applications. To address these challenges, fast ion conductive LiTi 2 (PO 4 ) 3 (LTPO) is employed to modify the typical Li-rich cathode Li 1 · 2 Mn 0 · 56 Ni 0 · 17 Co 0 · 07 O 2 (LMNCO) via a sol-gel process combined with a two-step annealing treatment in this work. Serving as a physical separator, LTPO coating effectively depresses the side reactions at cathode-electrolyte interface and the transition-metal dissolution from LMNCO active material under harsh electrochemical environment. Meanwhile, LTPO layer with high ion conductivity could facilitate the interfacial Li + diffusion during charge/discharge process. In addition, partial Ti 4+ ions doped into LMNCO effectively elevate the oxygen electronegativity and restrain the excessive oxidization of lattice oxygen, thus stabilizing the crystal structure and alleviating the stress-strain propagation upon cycling. Electrochemical characterization results demonstrate that the LTPO-modified LMNCO cathode exhibits a superior capacity retention of 86.5 % after 400 cycles at room temperature and that of 73.7 % even under an elevated temperature of 45 °C after 250 cycles under 1C. This study provides a facile strategy for the surface modification of Li-rich layered-structure oxides, which also sheds light in enhancing electrochemical performances for various cathode materials .
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 35
·24385-24392
·
IF 3.9
Shiyu Cao,Yanhong Xiang,Qiuling Zou,Youliang Jiang,Hanzhang Zeng,Jian Li,Jianhua Wu,Xiangsi Wu,Xianwen Wu,Lizhi Xiong
To alleviate the depletion of lithium resources and improve battery capacity and rate capacity, the development of aqueous zinc-ion batteries (AZIBs) is crucial. The open channels monoclinic structure Li3V2(PO4)3 is conducive to the transfer and diffusion of guest ions, making it a promising cathode material for AZIBs. Therefore, in this study, nanoneedles and particles Li3V2(PO4)3 cathode materials for AZIBs were prepared by a hydrothermal assisted sol–gel method, and the effect of synthesized pH values was studied. XRD results show that all samples had the monoclinic structure, and the Li3V2(PO4)3 sample prepared at pH = 7 exhibits (LVP-pH7) the highest peak tips and narrowest peak widths. SEM images demonstrate that all samples have the morphology character of randomly oriented needles and irregular particles, with the LVP-pH7 sample having more needle-like particles that contribute to ion diffusion. EDS results show uniform distribution of P, V, and O elements in the LVP-pH7 sample, and no obvious aggregation phenomenon is observed. Electrochemical tests have shown that the LVP-pH7 sample exhibits excellent cycling performance (97.37% after 50 cycles at 200 mA g−1) and rate ability compared to other samples. The CV test results showed that compared with other samples, the LVP-pH7 sample had the most excellent ionic diffusion coefficient (2.44 × 10−12 cm2 s−1). Additionally, the Rct of LVP-pH7 is the lowest (319.83 Ω) according to the findings of EIS and Nyquist plot fitting, showing a decreased charge transfer resistance and raising the kinetics of the reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Wei Zhao,Xunhui Xiong,Yingbang Yao,Bo Liang,Ye Fan,Shengguo Lu,Tao Tao
The construction of high capacity cathode materials consisting of two active components, LiFe x Mn 1-x PO 4 and Li 3 V 2 (PO 4 ) 3 , is rarely reported. Herein, 5LiFe 0.9 Mn 0.1 PO 4 ∙4Li 3 V 2 (PO 4 ) 3 /C (LFMVP/C) composites are synthesized by a simple two-step process, including ball milling and heat-treatment. The electrochemical reactivity of the composites with lithium is evaluated. The cathode assembled with LFMVP/C shows better electrochemical performance than that of the single active component (LiFePO 4 , LiMnPO 4, or Li 3 V 2 (PO 4 ) 3 ) during charging and discharging in the potential range of 2.4 and 4.8 V. It delivers the specific capacities of 195, 173, and 158 mAh∙g −1 at 0.1C, 0.5C, and 2C, and retains 88% of the initial discharge capacity after 100 cycles at 0.1 C. Compared with the single active component (LiFePO 4 , LiMnPO 4, or Li 3 V 2 (PO 4 ) 3 ), the lithium-ion diffusion coefficient of the composite composed of two active components (LFMVP/C) is higher.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2024
·
IF 2.4
Zhang Ruixuan,Wang Qiushi,Chen Liang,Zhang Jun,Liu Zhaoping
Due to the intrinsic structural stability, materials with polyanionic framework have attracted worldwide attention to build-up aqueous metal-ion batteries for large-scale energy storage. Anion-dependent electrochemical behaviors of graphene-modified Na 3 V 2 (PO 4 ) 3 (rGO/NVP/C) with rhombohedral structure have been explored. Compared to common saturated solutions, remarkable improvements on overall the electrochemical performances have been achieved in novel deep eutectic solvents (DES) based on methylsulfonylmethane, perchloride salts and water. A high-voltage aqueous lithium-ion battery consisted of rGO/NVP/C nanomaterials as cathode materials and carbon-coated NbOPO 4 as anode materials (rGO/NVP/C||DES-Li||NbOPO 4 ) exhibits a specific energy of 74 Wh kg −1 with a voltage output up to 1.8 V and excellent capacity retention that is above 80.1% after 600 cycles at 2 C current density. Kinetic studies have clearly shown that Li + (de)intercalation in rGO/NVP/C in DES is dominated by a diffusion-controlled process. During the repetitive Li + (de)intercalation, a phase transformation from Na 3 V 2 (PO 4 ) 3 phase into Li 2 NaV 2 (PO 4 ) 3 is identified. The negligible changes of lattice volume within Na 3 V 2 (PO 4 ) 3 during Li + (de)intercalation, and the wide electrochemical window of DES together with the low activity of water in DES enable the long cycle life of rGO/NVP/C||DES-Li||NbOPO 4 . Graphical abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jinhong Song,Chen Zhang,Zejian Zheng,Shizhe Huo,Yihan Lin,Fei Yang,Lei Liu
SnO 2 layer between Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) and lithium anode was prepared through simple scratch-coating process to improve interface properties. The physical phase, morphology, and electrochemical properties of Li/SnO 2 /LAGP structure were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical analytical methods. It was found that SnO 2 layer effectively improved the interface stability of LAGP and lithium anode. The prepared Li/SnO 2 /LAGP/SnO 2 /Li symmetric cell exhibited a large critical current density of 1.8 mA cm −2 and demonstrated excellent cycling characteristics. The polarization voltages of symmetric cell were 0.1 V and 0.8 V after 1000 h of cycling at current densities of 0.04 mA cm −2 and 0.5 mA cm −2 , respectively. Li/SnO 2 @LAGP/LiFePO 4 solid-state full cells were also assembled, exhibiting a discharge specific capacity of 150 mAh g −1 after 200 cycles at 0.1C with capacity retention rate of 96 %. The good interface properties of Li/SnO 2 /LAGP structure are attributed to the transformation of SnO 2 layer into a buffer layer containing Li 2 O, Sn 0 , and Li x Sn y alloy during cycling process, which effectively inhibits the reduction reaction between LAGP and lithium anode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）