International Journal of Electrochemical Science
·
2023
·Vol. 14
·期 3
·2815-2821
·
IF 1.5
Xiang Ding,Xiaobing Huang,Shibiao Zhou,Anguo Xiao,Yuandao Chen,Chenggang Zuo,Junling Jin
Na 3 V 2 (PO 4 ) 3 (NVP) is a potential cathode material for sodium ion batteries (SIBs) due to its stable three-dimensional NASICON structure and high theoretical energy density. In this paper, the carbon-coated Na 3 V 2 (PO 4 ) 3 (NVP/C) cathode materials using pitch as carbon source were synthesized by a simple solid-state reaction method combined with microwave calcinations. The electrode performance of as-prepared NVP/C materials were investigated and the results demonstrated that the NVP/C composite with 13.1 wt.% carbon shows the best electrochemical properties. It possesses a high initial discharge capacity of 108.2 mAh g -1 , 90.5 mAh g -1 at 0.2 C and 10 C. After 1000 cycles at the rate of 10 C, the discharge capacity remained almost unchanged, with no capacity fading.
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高影响因子
IONICS
·
2022
·Vol. 28
·期 6
·2693-2700
·
IF 2.961
Ma Dongjuan,Chen Long,Li Yuan,Liu Yan,Zhang Hao,Wang Biyan
Solid polymer electrolyte (SPE) is an ideal substitute for routine liquid electrolyte for next-generation safety lithium (Li) batteries. Nevertheless, SPE cannot effectively impede Li dendrite growth due to the poor mechanical strength, which prevents its practical applications. Herein, an asymmetric sandwich solid electrolyte constructed by dopamine-modified Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 (PDA@LATP) on one side was prepared by solution casting method. The asymmetric electrolyte exhibits admirable ionic conductivity (1.2 × 10 –4 S cm −1 at 25 °C), high ionic transference number (0.47), wide voltage window (4.6 V vs . Li/Li + ) and good thermal stabilities. The PDA@LATP can not only impede Li dendrite growth, but also avoid the LATP reaction with Li anode. The assembled solid-state LiFePO 4 |Li battery assembled with asymmetric solid electrolyte delivers a satisfactory capacity retention up to 88.2% after 300 cycles at 0.5 C and under 25 °C (88.1% after 100 cycles at 0.5 C and under 70 °C). The asymmetric design of solid electrolyte provides a promising options for realizing safe energy storage systems. Graphical abstract We propose an asymmetric sandwich solid electrolyte, which can enable LiFePO 4 |Li battery stably and safely cycled at 25 °C and 70 °C, respectively, with excellent ionic conductivity, electrochemical and thermal stability. This asymmetric electrolyte ensures the inhibition of Li dendrites and stable electrolyte/anode interface.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Long Chen,Jiyou Zhong
Broadband near-infrared (NIR) phosphors are crucial components of NIR phosphor-converted light-emitting diode (pc-LED) sources for various smart spectroscopy applications. However, developing an efficient, tunable, and inexpensive broadband NIR phosphor with sufficient spectral coverage remains a great challenge. In this work, a cubic phosphate K2AlTi(PO4)3 with highly structural rigidity was chosen as host material for Cr3+ substitution to create an efficient NIR emission. Synthesizing this compound, the obtained material exhibits a broadband NIR emission covering 700–1200 nm with a peak wavelength ranging from 820 to 860 nm depending on the Cr3+ substituting concentration. The Cr3+ concentration optimized sample possesses a photoluminescence quantum yield (PLQY) of 76.4% with an emission peak centered at 857 nm and a full width at half-maximum (fwhm) of 184 nm under 464 nm exaction, demonstrating an efficient and relatively long-wavelength NIR emission with wide spectral coverage. This broadband NIR emission is mainly derived from a single kind of emission center deduced from spectral analysis, luminescence dynamics, and first-principle calculations. Using this material, the fabricated NIR pc-LED device presents an excellent NIR output power and NIR photoelectric conversion efficiency, making this material attractive in practical applications of night-vision and bioimaging. Therefore, this work not only provides a broadband NIR material with superiorities of low cost, high efficiency, wide-range tunability, wide spectral coverage, and relatively long-wavelength NIR emission for spectroscopy applications but also highlights some clues to discover this kind of materials.
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ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Peng Wei,Yanxiang Liu,Yarui Su,Ling Miao,Yangyang Huang,Yi Liu,Yuegang Qiu,Yuyu Li,Xiaoyu Zhang,Yue Xu,Xueping Sun,Chun Fang,Qing Li,Jiantao Han,Yunhui Huang
We are presenting a sol–gel method for building novel nanostructures made of nanosized F-doped Na1–2xTi2(PO4)3–xFx (NTP-Fx, x = 0, 0.02, 0.05, and 0.10) particles embedded in three-dimensional (3D) carbon matrices (NTP-Fx/C). This technique combines advantages of both zero-dimensional materials and 3D-carbon networks. Proper fluorine doping stabilizes the NTP structure and greatly enhances ion/electron transportation, leading to superhigh-rate electrochemical performance and ultralong cycle life. The composite electrode delivers high specific capacities of 121, 115, 112.2, 110.1, 107.7, 103.1, 85.8, and 62.5 mA h g–1 at 0.2, 0.5, 1, 2, 5, 10, 20, and 30 C, respectively. It retains an unbelievable ∼70% capacity after a thousand cycles at a rate as high as 10 C. Electroanalytical results reveal that fluorine doping significantly enhances Na+ diffusion kinetics. Meanwhile, density functional theory calculations demonstrate F-doped NTPs’ own outstanding electrochemical properties, which is due to the enhanced intrinsic ionic/electronic conductivity. The results show that anion doping is an efficient way to make high-performance NTP anodes for sodium-ion batteries.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaoya Gao,Zhimin Li,Honglin Yan,Dongyan Zhang,Yuan Wang,Yuan Ha
Ni-rich layered LiNi 0.80 Co 0.15 Al 0.05 O 2 (NCA) cathode materials have attracted extensive attention in power lithium ion batteries on account of their high specific capacities and low voltage delay. However, they still suffer from inferior cycling stability, especially operating at a high cutoff voltage. In this paper, a surface modification strategy was proposed by utilizing Al(PO 3 ) 3 as a coating material to enhance the cycling performance of NCA in 2.7–4.6 V (vs. Li/Li + ). The surface modification effects of Al 3+ lattice doping and Al(PO 3 ) 3 coating were verified to be well achieved. In particular, besides the functions in stabilizing surface crystal structure of the NCA and isolating the erosion from electrolyte, the Al(PO 3 ) 3 coating could eliminate the residual lithium on the NCA surface to in-situ generate the Li 3 PO 3 which was conductive to the rate performance. Accordingly, the Al(PO 3 ) 3 -modified NCA cathode delivered excellent cycling performance, of which the initial discharge capacity was 235.9 mAh . g −1 at high cutoff voltage of 4.6 V, with a capacity retention of 71.6% after 100 cycles at 1 C. This work demonstrates the feasibility of surface modification on NCA via the phosphate coating with multiple functions, and provides an efficient approach to improve the cycling stability of Ni-rich layered cathode materials at higher cutoff voltage.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Binggong Yan,Yongchao Wang,Hongliang Ren,Xizhao Lu,Masashi Kotobuki,Bin Liu,Kaiyong Jiang
NASICON-structured solid-state electrolyte, namely Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) possesses high ionic conductivity and good compatibility with lithium metal that make it an ideal electrolyte for next-generation lithium battery. However, high interfacial impedance and possible dendrite limit its practical applications. To reduce interfacial impedance, herein, surface texturing on the LAGP is conducted using a femtosecond laser, and further wetted by ionic liquids. The femtosecond laser-modified surface can effectively increase wettability and improve the interfacial contacts. Low area specific impedance of 81.4Ω cm -2 is obtained and the full battery demonstrates good electrochemical performances.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 36
·1802684
·
IF 13.325
Zhongyu Zhang,Malin Li,Yu Gao,Zhixuan Wei,Meina Zhang,Chunzhong Wang,Yi Zeng,Bo Zou,Gang Chen,Fei Du
Hybrid potassium-ion capacitors (KICs) show great promise for large-scale storage on the power grid because of cost advantages, the weaker Lewis acidity of K + and low redox potential of K + /K. However, a huge challenge remains for designing high-performance K + storage materials since K + ions are heavier and larger than Li + and Na + . Herein, the synthesis of hierarchical Ca 0.5 Ti 2 (PO 4 ) 3 @C microspheres by use of the electrospraying method is reported. Benefiting from the rich vacancies in the crystal structure and rational nanostructural design, the hybrid Ca 0.5 Ti 2 (PO 4 ) 3 @C electrode delivers a high reversible capacity (239 mA h g −1 ) and superior rate performance (63 mA h g −1 at 5 A g −1 ). Moreover, the KIC employing a Ca 0.5 Ti 2 (PO 4 ) 3 @C anode and activated carbon cathode, affords a high energy/power density (80 W h kg −1 and 5144 W kg −1 ) in a potential window of 1.0–4.0 V, as well as a long lifespan of over 4000 cycles. In addition, in situ X-ray diffraction is used to unravel the structural transition in Ca 0.5 Ti 2 (PO 4 ) 3 , suggesting a two-phase transition above 0.5 V during the initial discharge and solid solution processes during the subsequent K + insertion/extraction. The present study demonstrates a low-cost potassium-based energy storage device with high energy/power densities and a long lifespan.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Rui Du,Chenghao Qian,Changcheng Liu,Que Huang,Yanjun Chen
Currently, the low ionic and electronic conductivities of Na 3 V 2 (PO 4 ) 3 (NVP) have been hindered its further application. In this paper, a simultaneous optimized method of Er 3+ substitution and carbon nanotubes (CNTs) enwrapping is proposed for the first time. Due to the large ionic radius of Er 3+ (89 pm vs 64 pm of V 3+ ), Er 3+ occupying the position of V 3+ makes the crystal structure more stable and alleviates the deformation of the crystal cell. Meanwhile, the interplanar spacing of NVP is broadened after introducing Er 3+ , so the de-intercalation rate of Na + can be accelerated and the kinetic properties are improved. In addition, the enwrapped CNTs connecting with amorphous carbon layers construct a conductive substrate for the fast electronic transportation, which significantly modifies the electronic conductivity. Moreover, the CNTs benefits to inhibit the agglomeration of NVP active materials and make the distribution more uniform and grain size more smaller. The decreasing size indicates a shorter pathway for Na + migration, which improves its apparent ionic diffusivity . Through the above analysis, the dual modification strategy can efficiently improve the kinetic properties of NVP system. Notably, Na 3 V 1.93 Er 0.07 (PO 4 ) 3 / C@CNTs (NVEP-0.07) submits a high capacity of 84.2 mAh g −1 at 50 C and maintains 70.6 mAh g −1 after 8000 cycles, corresponding to a high retention ratio of 83.9 %. The assembled NVEP-0.07 // CHC full cell reveals 146.2 mAh g −1 at 0.1 C, which successfully lightens the LED bulbs, indicating the excellent application potential of NVEP-0.07. Impressively, the recycled XRD/SEM/XPS results demonstrate the significantly improved crystal stability and chemical state of NVEP-0.07.
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高影响因子
MUSCLE & NERVE
·
2025
·Vol. 71
·期 3
·474-486
·
IF 3.1
Zhuajin Bi,Qing Zhang,Huajie Gao,Huizhen Ge,Jiayang Zhan,Mengge Yang,Bitao Bu
Introduction/Aims Tofacitinib, a first-generation Janus kinase (JAK) 1/3 inhibitor, is commonly used for treating ulcerative colitis and rheumatoid arthritis. However, its role in myasthenia gravis (MG) remains unclear. This study aimed to evaluate the immunomodulatory effects of tofacitinib on experimental autoimmune myasthenia gravis (EAMG) and peripheral blood mononuclear cells (PBMCs) from patients with MG. Methods Flow cytometry, enzyme-linked immunosorbent assay (ELISA), quantitative reverse transcription polymerase chain reaction (qRT-PCR), and Western blot were used to evaluate the effects of tofacitinib on T helper (Th) cell profiles, humoral immune responses, and the JAK-signal transducer and activator of transcription (STAT) pathway proteins. Results In vivo, tofacitinib significantly ameliorated EAMG severity in rats, reducing the proportions of Th1, Th17 and memory B cells, and anti-acetylcholine receptor (AChR) antibodies levels, while increasing the proportions of regulatory T (Treg) cells. In vitro, tofacitinib administration resulted in a significant decrease in the proportions of Th1 and IgG-secreting B cell, and a significant upregulation of Treg cells in mononuclear cells (MNCs) from EAMG rats, which was consistent with findings in PBMCs from MG patients. Further analysis revealed that tofacitinib inhibited CD4 + T cell differentiation into Th1 by decreasing phosphorylated STAT1 levels, while promoting Treg differentiation via increased phosphorylated STAT5 levels in MNCs from EAMG rats. Discussion Tofacitinib modulates Th cell profiles and humoral immune responses by targeting the JAK–STAT pathway, suggesting its potential as a therapeutic candidate for MG. Further clinical studies are warranted to evaluate the efficacy and safety of tofacitinib in MG patients.
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Jiayang Huang,Yao Su,Zhangjie Qian,Miaoer Wu,Yunchang Xie,Chao Zeng
The photocatalytic conversion of CO2 and H2O into useful chemicals or fuels over semiconductor photocatalysts is regarded as a promise technology to settle the problems of global warming and energy exhaustion. Whereas, the inefficient photo-absorption and slow charge dynamics limit the CO2 photoreduction efficiency. Here, a ternary heterojunction photocatalyst Cu2Cl(OH)3/In/In2O3 (Cu H IO) with intimate interface is obtained via hydrogen chemical reduction approach followed by hydrolysis reaction, where In species can be produced on the surface of In2O3 from the hydrogen chemical reaction with the calcining temperature over 500℃. The Cu H IO exhibits enhanced photocatalytic activity of CO2 conversion to the pristine In2O3, In2O3 with In species (H IO), and Cu2Cl(OH)3/In2O3 (Cu IO). On the absence of sacrificial agent or cocatalyst, the yield rate of CO and CH¬4 over Cu H IO are 4.36 and 1.09 μmol·g-1·h-1, which is 8.38-fold and 18-fold that of pristine In2O3 (0.52 and 0.06 μmol·g-1·h-1), respectively. The photocatalytic performance enhancement of Cu H IO results from the construction of the ternary heterojunction, which synchronous improve the photo-response and charge separation of In2O3. Moreover, the possible CO2 reduction pathway over Cu H IO has also been investigated and proposed. This work provides an important strategy for developing high-efficiency heterojunction photocatalyst system for solar fuel generation.
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PubMed
高影响因子
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
·
2025
·
IF 1.9
Shuhan Yang,Shouqi Zhao,Yingying Ning,Dan Zhao
Previous studies have shown that co-culture methods can enhance exopolysaccharide production, no studies have reported this enhancement in co-cultures between Weissella confusa and Candida shehatae. This study developed an efficient co-culture system combining W. confusa XG-3 and C. shehatae (1:1 ratio), and employed response surface methodology to optimize both exopolysaccharide yield and properties. The initial co-culture produced 56.82 ± 0.12 g/L exopolysaccharide, a 1.63-fold increase over single culture. Optimization (sucrose: 105.97 g/L; yeast extract: 5.81 g/L; peptone: 6.24 g/L) further increased the yield to 115.66 g/L, a 2.04-fold improvement. The co-cultured exopolysaccharide had high water solubility (60.45 ± 0.70%) and water holding capacity (614.74 ± 9.26%). The co-cultured EPS showed significant antioxidant activity. At 5 mg/mL, the scavenging rates of ABTS, DPPH, hydroxyl, superoxide, H2O2 and total reducing power reached the highest 52.22 ± 0.47%, 50.79 ± 2.86%, 55.80 ± 2.56%, 36.05 ± 2.07%, 66.85 ± 0.30%, and 0.39 ± 0.01. It also had a superior effect on the proliferation of several probiotics compared with commercial prebiotics and exhibited high thermostability with a degradation threshold at 292.5 °C. These results demonstrate a novel, scalable strategy for producing multifunctional EPS with broad applications in the food industry.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Bangqian Wang,Jianjun He,Congcong Zhu,Bangcai Huang,Haijun Chen,Shan Guo,Fuzhong Wu,Guanghui Liu,Yong Deng,Xinyi Dai
The monoclinic Li 3 V 2 (PO 4 ) 3 cathode demonstrates significant promise for high-performance lithium-ion batteries (LIBs) technologies, primarily due to its outstanding energy density and enhanced safety performance. However, its practical application was hindered by inherent limitations, particularly, intrinsically restricted electron mobility and pronounced capacity fading during cycling at voltages exceeding 4.6 V. To overcome these challenges, this study employs a facile sol-gel method to synthesize carbon-coated Li 3 V 2 (PO 4 ) 3 materials while introducing In 3+ substitution for partial V 3+ sites. Electrochemical evaluations substantiate that the optimal In 3+ doping level of Li 3 V 2 (PO 4 ) 3 (LVP/C-In0.09) exhibits significantly enhanced performance. Specifically, the LVP/C-In0.09 sample delivers remarkable capability, sustaining 131.4 mAh g −1 at 10 C while maintaining 88.4 % of initial capacity after 500 cycles, surpassing the undoped LVP/C sample (initial capacity: 106.5 mAh g −1 ; retention: 75.7 %). XRD analysis indicates that incorporating In 3+ effectively broadens Li + diffusion channels. XAFS characterization reveals that the unit cell expansion is attributed to an increased V-V interatomic distance. Additionally, the controlled In 3+ doping effectively decreases the electrochemical resistance while substantially improving Li + diffusion kinetics. This study proposes a potential strategy to boost the practical application of Li 3 V 2 (PO 4 ) 3 in LIBs.
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高影响因子
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