ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Zhangxing He,Yingqiao Jiang,Jing Zhu,Haiyan Wang,Yuehua Li,Huizhu Zhou,Wei Meng,Lei Dai,Ling Wang
N-doped carbon coated LiTi 2 (PO 4 ) 3 composites were synthesized by polyaniline (PANi) as carbon and nitrogen bi-sources, and used as anode for aqueous lithium ion battery (ALIB). High-quality N-doped carbon layers were achieved to modify LiTi 2 (PO 4 ) 3 crystal. ALIB using as-synthesized LiTi 2 (PO 4 ) 3 @C-N as anode exhibited superior rate performance. It delivered discharge capacities of 122.4, 105.8, and 95.3 mAh g −1 at rates of 0.2, 10, and 20C, respectively, much higher than those (97.4, 61.1, and 43.9 mAh g −1 ) of LiTi 2 (PO 4 ) 3 /C using sucrose as carbon source. Furthermore, LiTi 2 (PO 4 ) 3 @C-N anode demonstrated outstanding cycling performance with a capacity retention of 82.1% after 1000 cycles at 2C, while only 56.3% of capacity retention was kept for that using sucrose as carbon source. The excellent electrochemical performances of LiTi 2 (PO 4 ) 3 @C-N are mainly attributed to good dispersion, proper carbon layer, and nitrogen doping, further accelerating the charge transfer and diffusion of Li ions/electrons.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 24
·28077-28087
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IF 2.478
Zhao Jiaqi,Hu Chen,Lu Jingyao,Sun Ruyi,Wang Zhen,Yin Yanzhen,Liu Wenlong,Gu Chengcheng,Li Zichao,Zhong Degao,Teng Bing
A series of single-phase white-emitting phosphors Ba 3 Bi(PO 4 ) 3 (BBP):8 at.% Dy, x at.% Eu were successfully synthesized through high temperature solid-phase method. The luminescence properties of BBP:8 at.% Dy, x at.% Eu were systematically investigated. Experimental results indicate the doping of Eu 3+ ions can effectively compensate the red light component in the emission spectrum and tune the correlated color temperature of BBP:8 at.% Dy, x at.% Eu from cool white light (5097 K) to warm white light (3661 K). Moreover, BBP:8 at.% Dy 3+ , 0.8 at.% Eu 3+ phosphor exhibits excellent thermal stability and the fluorescence intensity at 150 °C can still maintain 76% of that at 25 °C, while the activation energy is determined to be ~ 0.23 eV. In addition, the quantum efficiency of BBP:8 at.% Dy 3+ , 0.8 at.% Eu 3+ phosphor were measured to be 61%. These results suggest that BBP:8 at.% Dy 3+ , 0.8 at.% Eu 3+ can be a NUV-pumped single-phase white phosphors with excellent comprehensive performances.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Erqing Zhao,Jiaming Li,Yudi Guo
Nasicon-type Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) is a potential electrolyte for lithium-ion batteries due to its appropriate conductivity and good air stability. Herein, LATP was co-doped with Ga and Si to improve its ionic conductivity. The Li 1.325 Al 0.29 Ga 0.01 Ti 1.7 Si 0.025 P 2.975 O 12 (LAGTSP025) electrolyte exhibits an ionic conductivity of 8.92 × 10 −4 S/cm at 30 °C, which is mainly ascribed to its enlarged crystal lattice and high densification. This electrolyte material was incorporated into poly(ethylene oxide) (PEO) polymer to form a polymer-based PEO-LITFSI-LAGTSP025 solid composite electrolyte (SCE). The optimized SCE shows a high ionic conductivity of 5.33 × 10 −4 S/cm and excellent interfacial stability at 60 °C. Consequently, a Li/SCE/Li symmetric battery can stably cycle for 1600 cycles at a current density of 0.1 mA/cm 2 . Moreover, an LFP/SCE/Li all-solid-state lithium-ion battery (ASSLIB) maintains a discharge capacity of 143.56 mAh/g and exhibits 95.21% capacity retention after 300 cycles at 0.5C. This work demonstrates PEO-LITFSI-7.5LAGTSP025 SCE is a potential solid electrolyte for ASSLIBs.
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ACS Applied Materials & Interfaces
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2026
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IF 7.8
Xiaojuan Liu,Zhifeng Li,Yiming Wang,Jiayi Wu,Chengzhou Li,Chunxiang Wang,Youming Yang
Na3V2(PO4)3 (NVP) cathodes suffer from intrinsically low electronic conductivity and sluggish, nonuniform two-phase conversion, which together limit their rate capability, cycle life, and low-temperature performance. A pulsed-laser strategy is developed to simultaneously generate hollow NVP spheres and achieve in situ anchors 3–4 nm carbon quantum dots (CQDs) onto NVP, yielding a hollow/CQD architecture (NVP-L). The hollow morphology shortens Na+ diffusion paths and buffers transformation-induced strain, while uniformly distributed CQDs form an internal conductive network that enhances local electronic transport and homogenizes interfacial reaction environments. Temperature-dependent GITT and Arrhenius analyses reveal a pronounced reduction of the effective activation energy from 0.51 eV for pristine NVP to 0.07 eV for NVP-L, accompanied by a several-fold increase in the Na+ chemical diffusion coefficient. Consequently, NVP-L delivers a high specific discharge capacity of 105.1 mAh g–1 at 20 C and retains 87.1% of its capacity after 3000 cycles and maintains 89.7 mAh g–1 after 500 cycles at −20 °C and 1 C. A full cell paired with a Na3Ti2(PO4)3 anode achieves an energy density of 148.5 Wh kg–1 and retains 91.6% and 88.7% of its capacity after 200 cycles at 1 and 5 C, respectively. This low-energy, scalable pulsed-laser approach provides a practical route to concurrently tailor morphology and interfaces, lower phase-conversion barriers, and realize fast, durable NASICON-type sodium-ion cathodes.
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高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 48
·15162-15165
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IF 6.641
Zhi Fang,Bingping Yang,Chunli Hu,Jianggao Mao
A new nonlinear optical material, Ba11[Al(PO4)4](P2O7)(PO4)3, was rationally synthesized via the hybridization of three types of anionic groups, namely [AlO4]5−, [PO4]3− and [P2O7]4−, via a spontaneous nucleation method. Ba11[Al(PO4)4](P2O7)(PO4)3 was characterized with high thermal stability, deep ultraviolet transparency and moderate second-order optical nonlinearity, which were favourable for practical applications.
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高影响因子
CERAMICS INTERNATIONAL
·
2016
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IF 2.758
Youren Dong,Shangshu Qian,Lianyi Shao,Haoxiang Yu,Lei Yan,Peng Li,Xiaoting Lin,Nengbing Long,Miao Shui,Jie Shu
A series of Li 3− x Na x V 2 (PO 4 ) 3 /C (0≤ x ≤3) materials are successfully prepared by a simple solid-state reaction method and used for the first time as anode materials for Na-ion batteries. Powder X-ray diffraction (XRD) results show that the phase structures of Li 3− x Na x V 2 (PO 4 ) 3 /C evolve along with the change of Li/Na atomic ratio (0≤x≤3). With increasing x in Li 3− x Na x V 2 (PO 4 ) 3 /C from 0.0 to 3.0, the main phase in as-prepared sample transforms from monoclinic Li 3 V 2 (PO 4 ) 3 to rhombohedral Li 3 V 2 (PO 4 ) 3 , and finally to rhombohedral Na 3 V 2 (PO 4 ) 3 , which results in different sodium storage behavior and performance between Li 3− x Na x V 2 (PO 4 ) 3 /C (0≤ x ≤3) materials. Electrochemical results show that Li 3− x Na x V 2 (PO 4 ) 3 /C ( x =0.0, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0) can deliver the initial charge capacities of 21.1, 35.9, 33.8, 41.7, 43.3, 43.9 and 47.7 mAh g −1 at a current density of 10 mA g −1 , respectively. After 45 cycles, the reversible capacities can be kept at 16.9, 45.1, 32.6, 44.6, 43.7, 37.8 and 27.3 mAh g −1 for Li 3 V 2 (PO 4 ) 3 /C, Li 2.5 Na 0.5 V 2 (PO 4 ) 3 /C, Li 2 NaV 2 (PO 4 ) 3 /C, Li 1.5 Na 1.5 V 2 (PO 4 ) 3 /C, LiNa 2 V 2 (PO 4 ) 3 /C, Li 0.5 Na 2.5 V 2 (PO 4 ) 3 /C and Na 3 V 2 (PO 4 ) 3 /C, respectively. Furthermore, the structural reversibility of Li 3− x Na x V 2 (PO 4 ) 3 /C ( x =1.0, 2.0, and 3.0) is also observed by in-situ XRD observation during sodiation/de-sodiation process. All these observed evidences indicate that only some of Li 3− x Na x V 2 (PO 4 ) 3 /C (0≤ x ≤3) can be used as possible sodium storage materials.
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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
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Qin Liu,Peipei Dang,Guodong Zhang,Hongzhou Lian,Ziyong Cheng,Guogang Li,Jun Lin
Mn2+-doped luminescent materials play a significant role in a variety of fields, including modern lighting, displays, and imaging. Mn2+ exhibits a broad and adjustable emission, hinging on the local environment of the crystal field and the interaction of the 3d5 electrons. However, it is still a challenge to realize the precise control of the emission of Mn2+ ions due to site-prior occupation in a specific lattice. Here, the formation of Mn–Mn dimers is proposed to be an effective strategy to design a novel red emission. Multimode emitters in Mn2+-activated AZn4(PO4)3 (A = K, Rb, and Cs) with unique [Zn4PO12] chains and [ZnOn] groups are observed to achieve regular green and unusual red emissions. KZn4(PO4)3:Mn2+ shows broad dual emissions at 542 and 608 nm, attributed to [MnO4] and [Mn2O7] dimers, respectively. While K is replaced with Rb and Cs, the Zn ions form [ZnO4] tetrahedra and [ZnO5] octahedra. RbZn4(PO4)3:Mn2+ exhibits a broad red emission at 618 nm, ascribing to [Mn2O7] and [Mn2O8] dimers. CsZn4(PO4)3:Mn2+ also displays a broad orange-red emission at 608–620 nm with increasing doping levels, deriving from energy transfer from [MnO5] to [Mn2O7] and [Mn2O8] dimers. This work provides a framework for creating novel red emissions from Mn2+-doped luminescent materials.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Hongjie Chen,Yixuan Su,Yucong Chen,Minghan Bao,Mingjun Wu,Junyang Chen,Weitao Chen,Qiang Ru
The inherent low electronic conductivity of NASICON-type Na4MnV(PO4)3 (NMVP) impedes its use in advanced energy storage. Herein, we address this challenge by introducing a citric acid-derived carbon coating to elevate the material’s conductivity and electrochemical performance. By precisely tailoring the configuration of the carbon layer, we fabricated Na4MnV(PO4)3 encapsulated by a carbon coating (NMVP@C) and constructed a 3D hierarchical architecture with incorporated V(III) and Mn(II) states, which prompts the reversible redox reaction, augments Na+ storage capability, and mitigates volume expansion during cycling. The optimal cathode manifests superior rate capability and a long life span with 107.5 mA h g–1 at 1 C and 82.5% capacity retention over 5000 cycles at 20 C. The hard carbon//NMVP@C full cell confirms practical applicability with good electrochemical performance. This work underscores the pivotal interplay among the carbon layer, Na+ mobility, and structural integrity in NASICON cathodes, offering a pathway to develop high-performance and cost-effective cathode materials for sodium-ion batteries.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Haolong Tan,Tongwei Gao,Wensheng Yang,Yue Gao,Quan Xie,Yunjun Ruan,Qian Chen,Tinghong Gao
The rapid development of microelectronic devices has increased the demand for miniature energy storage systems that are highly safe and exhibit long cycling life and excellent energy density. However, the lack of low-cost and high-performance fabrication methods presents a significant challenge to thin-film electrode fabrication. This study reports a strategy combining controllable pre-curing treatment with rapid thermal annealing (RTA), which enables in situ fabrication of high-quality sodium vanadium phosphate [Na 3 V 2 (PO 4 ) 3 ] thin films. RTA facilitates the cleavage of weak metal–O bonds in the precursor film, whereas optimisation of the pre-curing duration (0–100 s) effectively eliminates organic residues and strengthens the carbon framework, suppressing particle agglomeration. This synergistic control substantially improves crystallization uniformity and film densification, resulting in a refined grain structure and highly oriented crystal facets. Under optimal conditions, the thin film demonstrates a high specific capacity of 85.6 mAh g −1 at a current density of 1 A g −1 , retains 72.5 mAh g −1 even at 20 A g −1 , and demonstrates 90.3 % capacity retention after 200 cycles. Moreover, the assembled full sodium-ion cell exhibits an average operating voltage of 1.3 V while maintaining 94.2 % capacity retention after 500 cycles. This study elucidates for the first time the synergistic regulation pathway of the pre-curing–RTA coupling mechanism in Na 3 V 2 (PO 4 ) 3 thin-film fabrication and proposes an advanced preparation strategy for cost-effective, highly integrated, high-power sodium-ion thin-film devices, providing critical theoretical foundations and robust technical support for next-generation all–solid state sodium microbattery design and development.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yun Yi,Kaixu Yang,Rongfeng Hu,Fei Liu,Chaochuang Yin,Jianxin Cao,Zheng Chen
Enhancing the surface and structural stability has been a research focus of nickel-rich layered cathode materials in lithium-ion batteries (LIBs). This work introduced a dual-functional modification strategy. LZMP is coated on the LiNi0.90Co0.05Mn0.05O2 (NCM90) particle surface to protect the cathode particles from erosion by air and acidic electrolyte, suppressing side reactions between the cathode and H2O, CO2, and HF, and hence enhances the stability of the cathode–electrolyte interphase film. Meanwhile, NCM90 is doped with Zr4+ and Mg2+, which substitute for Ni3+ in the lattice transition metal layer and Li+ in the lithium layer, respectively. Zr4+ forms a stronger Zr–O bond, while Mg2+ performs as a pillar ion, suppressing variations of the lattice parameters and maintaining the layered structure during cycling. The enhanced surface and bulk structural stabilities improve the cycling and rate performances of the cathode material. At 25 °C, 1C, and 2.7–4.3 V, the initial discharge specific capacity and the capacity retention after 200 cycles of 1%LZMP–NCM90 were 180.9 mAh g–1 and 86.0%, respectively, exceeding those of NCM90 (172.7 mAh g–1 and 76.4%). In summary, the LZMP modification synergistically alleviates the surface and bulk structure deterioration, thus preserving the electrochemical performance and improving the structural and cycling stability of NCM90.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Jun Cong,Shao-hua Luo,Pengyu Li,Kun Li,Pengwei Li,Shengxue Yan,Lixiong Qian,Xin Liu
Na3V2(PO4)3 has been attracting great interest from scholars owing to its high voltage platform and high energy storage capacity. However, its poor electronic conductivity and weak ion diffusion ability seriously restrict the application of its actual industrialization. In view of the above defects, Na3+xV2(PO4)3/C (x = 0, 0.2, 0.4, 0.6) cathode materials for sodium-ion batteries (SIBs) are prepared through a solid-phase method in this paper. The X-ray diffraction (XRD) results show that the Na-rich amount of x = 0.4 attains the upper limit of the solid solution of the Na-rich Na3V2(PO4)3, and the “ultracapacity” effect reaches the maximum at this x value; the capacity is as high as 132.4 mAh/g, with remarkable cycle stability (96% capacity retention after 300 cycles). The results of density functional theory (DFT) calculations clearly explain that the reason for the excess sodium occupying the electrochemically active Na2 site is the reason for the ultracapacity. It is found through the electron paramagnetic resonance (EPR) test that excessive sodium caused some high-valent V to be reduced to low-valent V, which maintained the electrical balance of the crystal and the stability of the Na-rich solid solution structure. Through the X-ray absorption near edge structure (XANES) of the V element, it is found that the change of V valence during the charge and discharge process of the Na-rich Na3V2(PO4)3 solid solution is consistent with that of Na3V2(PO4)3. Refined structural characterization by spherical aberration electron microscopy and ex situ XRD also prove that the Na-rich Na3V2(PO4)3 solid solution undergoes a phase transition during the charge–discharge process and can be reversibly recovered. These findings further prove that it is feasible to synthesize a new Na-rich Na3V2(PO4)3 solid solution with a stable structure, which makes Na3V2(PO4)3 a practical cathode material for SIBs having great potential in the future.
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