ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Zhanghao Cheng,Siyao Li,Xingying Wu,Yichi Zhang,Chenyu Wang,Yuezhen Mao,Chunwen Sun
As one of the most widely used composite electrolyte matrices, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) offers many advantages, such as excellent mechanical flexibility and a high dielectric constant. However, its inadequate mechanical strength leads to a limited ability to inhibit the growth of lithium dendrites, thus restricting its performance in solid-state lithium metal batteries. The key to overcoming this bottleneck lies in incorporating fillers to simultaneously improve the ionic conductivity and mechanical robustness of the electrolyte. In this work, lithium niobate (LiNbO3) and Ce-doped lithium niobate (LiNb0.9Ce0.1O3) nanofibers were employed as fillers in the PVDF-HFP-based electrolyte to promote the dissociation of lithium salts, thereby establishing a microenvironment conducive to efficient lithium-ion transport. The results demonstrate that when LiNb0.9Ce0.1O3 nanofibers are incorporated as electrolyte fillers, the dissociation of lithium salt is enhanced, thereby improving the ionic conductivity and Li+ transference number of the composite electrolyte. Furthermore, the composite solid electrolyte incorporated with LiNb0.9Ce0.1O3 nanofibers (LNCO CSE) exhibited an exceptional dendrite suppression capability, enabling lithium symmetric cells to operate stably at 0.1 mA cm–2 for over 1100 h. The Li||LNCO CSE||LiFePO4 full cells demonstrated outstanding rate performance and long-term cycling stability, delivering a reversible specific capacity of 136.9 mAh g–1 after 600 cycles at 1C. Furthermore, the Li||LNCO CSE||LiNi0.8Co0.1Mn0.1O2 full cell also exhibited excellent rate capability, and its capacity retention rate reaches as high as 74.1% after 500 cycles at 0.5 C.
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DOI
PubMed
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Zhouyang Xia,Jiawen Wang,Ange Zhu,Wasfa Zulfiqar,Yujie Cheng,Shenlei Shi,Karol Bartosiewicz,Yan Li,Gongxun Bai
Inspired by the natural responsive phenomena, a single-host, dual-stimuli-responsive luminescent system based on LiNbO 3 :Pr 3+ /Dy 3+ was developed via a conventional high-temperature solid-state method. The co-doped phosphors showed yellow, orange, and red-light emissions under excitation at 290, 365, and 461 nm, respectively. After cessation of UV excitation, the co-doped phosphor exhibited a red afterglow with a duration of six times longer than that of the Pr 3+ -only sample. Meanwhile, the temperature-dependent luminescence behavior allows high-sensitivity ratiometric optical thermometry, with a maximum relative sensitivity of 2.30% K −1 under 461 nm excitation. By integrating excitation-dependent color tunability, afterglow, and near-infrared emission within a single material platform, this results demonstrates a multimodal luminescent system capable of simultaneous information storage, anti-counterfeiting authentication, and optical sensing, highlighting its potential for high-security and multifunctional applications.
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Haiqing Wang,Wei Shi,Lei Hou,Chunhui Li,Zhiquan Wang,Lei Yang,Juncheng Cao
The rapid and accurate identification of the types and contents of early pathological markers by THz technology are of particular importance for the prevention and treatment of major diseases. Nevertheless, these markers usually contain interference from water and other non-target molecules, resulting in low signal-to-noise ratio (SNR) and making identification and quantitative analysis difficult. Here, based on THz spectroscopy from a high-power THz source radiated by LiNbO 3 , we perform quantitative and real-time THz detection of mixtures (α-lactose monohydrate and 4-aminobenzoic acid) in liquids. The results demonstrate that the absorption spectra of the aqueous biomolecular mixtures exhibit an accumulation of THz features of each pure product, i.e., the amplitude of the absorption peaks is proportional to the mixing ratio, while the corresponding absorption baseline increases with decreasing concentration. Furthermore, the content of the target substance can be calculated from the linear relationship between the absorption spectra of pure and mixed samples. This technology will support the future application of THz-TDS in early disease diagnosis under complex states and environments.
研究领域:
生物医学工程
·
光谱学
·
医学检测
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yifan Zhang,Laifu Yang,Wenqiang Wang,Gengchao Wang
LiNbO 3 is an intercalation material with high theoretical specific capacity, which is promising for lithium-ion capacitor (LIC) anode. However, the poor charge transfer dynamics makes LiNbO 3 unable to match the capacitive cathode in rate performance and cycle stability, resulting in poor electrochemical performance of the device. Herein, through the integrated process of in-situ nitrogen-doping with polypyrrole as the nitrogen source and hydrothermal deposition, the coaxial heterostructure of ultrafine LiNbO 3 nanoparticles and nitrogen-doped carbon nanotubes (NCNT) was realized. The large lithium-ion accessible surface and the bonding with the conductive channel significantly enhance the pseudocapacitive behavior of LiNbO 3 (capacitance contribution of 78.5% at 1 mV s −1 ). After 1000 cycles at a current density of 2 A g −1 , NCNT@LiNbO 3 still has a specific capacity of 154.9 mAh g −1 (89.8%). Thus, the assembled NCNT@LiNbO 3 //AC devices can charge and discharge up to 10000 cycles at a current density of 2 A g −1 , and the capacity retention rate can still reach 90.3%, and can provide an energy density of 142 Wh kg −1 . This work provides ideas for the interface and structure design of nanocomposite electrode materials.
研究领域:
材料科学
·
电化学
·
纳米复合材料
·
能源存储
·
界面工程
·
电极设计
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhengren Tao,Fangrui Cheng,Yinghan Wang,Sijie Su,Enhai Song,Jiulin Gan,Shi Ye
The arrangement of lithium and niobium in the LiNbO 3 lattice is crucial to its notable ferroelectric, piezoelectric, ion conductive, and nonlinear optical properties. However, the synthesis of Li concentration-gradient nanocrystals remains a significant challenge. In this paper, we report a reliable method for synthesizing LiNbO 3 : Yb/Er nanocrystals with a Li-gradient through topochemical molten salt synthesis. We elucidate the Li-gradient characteristics using various analytical techniques, including depth-dependent elemental analysis. Variable-temperature upconversion luminescence spectroscopy provided insights into thermally induced surface and interior Li + diffusion. Our findings demonstrate that Li-gradient nanocrystals exhibit enhanced ferroelectric behavior and increased sensitivity to mechanical force in upconversion emission response. This study proposes a feasible universal strategy for synthesizing alkali metal niobate materials with controlled polarization, offering promising candidates for flexible, low-power optoelectronic devices.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Yan Sunjing,Lu Chaocao,Zhu Huali,Huang Ziyi,Ying Jialong,Wang Yiying,Zhong Yi,Cao Penghui,Chen Zhaoyong
High-nickel layered material LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) is one of the most promising cathode materials for lithium-ion batteries because of its high specific capacity, low cost, and high working voltage. However, issues such as internal structure collapse and interface side reactions during long-term cycle hinder its practical application. In this study, Al, B, La, Nb, and Zr are selected for high-entropy doping of single-crystal NCM811 (SNCM811). Individual doping elements offer distinct advantages in optimizing the morphology, crystal structure, and lithiation/delithiation performance. A portion of the introduced Nb is uniformly coated on the material surface as LiNbO 3 . The resulting material, modified by high-entropy doping coupled with a LiNbO 3 coating (HE-SNCM811) exhibits a capacity retention of 91.5% after 100 cycles at 1 C in the voltage range of 2.7–4.3 V, which is significantly higher than the 73.6% retention of the pristine sample. At 10 C, HE-SNCM811 delivers a reversible specific capacity of 152.82 mAh‧g −1 which is 17.26 mAh‧g −1 higher than that of the pristine sample. The first-principles calculations are performed on the crystal structures of the pristine sample and the heterojunction structure formed between the high-entropy doped bulk phase and the LiNbO 3 coating. Compared to SNCM811, HE-SNCM811, exhibits a 0.18 eV reduction in the Li + migration energy barrier, along with an enlarged Li layer spacing and a reduced transition metal (TM) layer spacing. This enhanced Li + diffusion kinetics and stabilizes the microstructure of the material. The high-entropy modification widens the Li + transmission channel, strengthens the TM–O bonds, and effectively suppresses the irreversible H2–H3 phase transition. Additionally, the LiNbO 3 coating, as a fast ionic conductor, physically isolates the electrolyte, reduces HF attack, and prevents degradation of the cathode surface. This study offers a research approach for developing high-capacity and long-cycle cathode materials for lithium-ion batteries. Graphical abstract In this work, Al, B, La, Nb and Zr are introduced as high-entropy dopants, while Nb partially forms a LiNbO 3 coating on the surface, yielding the HE-SNCM811 cathode material. The modified sample exhibits high rate capability and stable cycling performance. First-principles calculations reveal a lower Li + migration barrier and a higher Li + diffusion rate in the high-entropy modified sample.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jianwei Lian,Jiajia Tao,Xiaojie Chai,Yan Zhang,Anquan Jiang
Effects of atmosphere, temperatures and duration time on the surface topography and the electrical conductivity of LiNbO 3 single crystals deposited with a 300-nm-thick layer of different metal films (Al, Mg and Zn) had been systematically investigated. LiNbO 3 samples covered with Al film annealed at 500 °C for 6 h in different atmosphere were firstly studied. There were a lot of small holes generated after the residual film cleaning. In addition, the surface roughness was enhanced with increasing pressure. Compared with areas that without metal Al coated, a sharp step was formed, especially the deep step of about 125 nm in 3%H 2 +Ar atmosphere. The I V curves reveal that the electrical conductivity of sample surface annealed at normal pressure was better than that in low vacuum. The current value was up to about 20 mA at 10 V in 3%H 2 +Ar, resulting in the conductivity significantly improved. Subsequently, samples deposited with different metal (Zn, Mg and Al, respectively) films annealed at 400 °C for 6 h in 3%H 2 +Ar were discussed. After wet etching, interestingly, a large number of nano-sized protrusions were formed on the surface. Both of samples coated with Mg and Zn films presented no obvious step depth, while a clear step about 13 nm was formed for Al-coated samples. The I V curves show that the surface conductivity of Zn-coated samples achieved the maximum of about 2.5 mA at 5 V among the three metals. Furthermore, Zn-coated samples annealed at different temperatures and holding time in 3%H 2 +Ar were also analyzed. After pickling, also, there were a lot of nanobulges appeared across the surface. With the temperatures keeping growth and the time extending, the nanobulges became much more compact and well-distributed. At the same time, the surface conductivity of samples would be gradually and effectively enhanced. The PL and XPS spectrums have indicated that more oxygen vacancies formed with increasing temperatures and holding time, resulting in the significant improvement in surface conductivity. The conduction mechanisms of sample surface can behave differently owing to the various annealing conditions.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 11
·110528
·
IF 4.316
Liangjun Zhang,Li Xiao,Jiangfeng Zheng,Hua Wang,Han Chen,Yirong Zhu
Layered LiNixMn1−xO2 structures with high discharge specific capacity and low cost are anticipated as the next-generation of high-energy density cathode active materials. However, the mixed arrangement of Li+ and Ni2+ in the cathode materials affects structural stability. Here, Nb5+ was doped into the structure of LiNi0.8Mn0.2O2 (NM82) to broaden the lithium-ion migration channels and alleviate the degree of ion mixing. LiNbO3 particle was coated on the surface of LiNi0.8Mn0.2O2 to form a spherical compound and reduce the erosion of HF and the dissolution of transition metals, which helped ameliorate the cyclic and structural stabilities of cathode materials. NM82 modified 1% Nb2O5 (LN/NM82-1.0) exhibited maximum discharge specific capacitance (177.7 mAh g−1 at 1.0C following 200 cycles) and excellent thermal stability (189.0 mAh g−1 at 1.0C following 200 cycles at 60 °C). The corresponding capacity retentions of this material were 87.54% and 85.37%, as LiNbO3 particle coating on the surface of NM82 decreased polarization and charge transfer resistor. Nb5+ in the host structure suppressed structural degradation and enhanced discharge capacity. This study determined the influence of Nb5+ substitution and LiNbO3 cladding on the structure and surface of LiNi0.8Mn0.2O2 and provides insights into commercial application of high-energy density layered structures of LiNixMn1−xO2 cathode materials.
研究领域:
材料科学
·
电化学
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高影响因子
危险品化学品经营许可证（带存储）