IEEE JOURNAL OF QUANTUM ELECTRONICS
·
2020
·Vol. 56
·期 3
·1-9
·
IF 2.384
Zong-Tao Li,Jie-Xin Li,Jia-Sheng Li,Zi-Hao Deng,Yue-Hua Deng,Yong Tang
The scattering effect plays an important role in improving the optical performance of the quantum dot (QD) white light-emitting diodes (LEDs). A majority of the previous studies have focused on the planar packaging structure only with respect to total internal reflection (TIR). In this study, SiO2 nanoparticles are incorporated into QD-silicone encapsulation of LEDs with semi-spherical lens packaging (SSLP) to exploit their scattering effect. The results show that the radiant efficacy (31.35%@100 mA) and luminous efficacy (87.56 lm/W@100 mA) of QD white LEDs can be optimized using SiO2 nanoparticle concentration (0.1 wt%) and that they increase by 5.04% and 11.08%, respectively, as compared to the conventional structure. A comprehensive ray-tracing simulation validates that the nanoparticles in the SSLP structure lead to severe loss of chip light. On the contrary, the fluorescence light increases due to the enhancement of conversion by QDs. The transmission electron microscopy images and the finite-difference time-domain simulation have been introduced to investigate the surface adsorption of SiO2 nanoparticle. This study indicates that SiO2 incorporation is an effective method to improve the efficiency of QD white LEDs, and provides a better understanding on the scattering effect based on TIR, color conversion, and surface adsorption.
研究领域:
光学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jiawei Ge,Quntao Tang,Honglie Shen,Fei Zhou,Haobing Zhou,Wangyang Yang,Binbin Xu,Xiao Cong
Porous silicon monoxide (p-SiO) is one of the most promising anode materials for lithium-ion batteries because it possesses high theoretical capacity and small volume expansion. Traditionally, SiO is prepared at 1200 °C, which restrains the application of SiO materials due to its high consumption of energy. Herein, a low-temperature synthesis process of p-SiO at 650 °C is developed from a controllable magnesiothermic reduction of porous silica . Compared with normally reduced solid silica (SiO 2 @SiO), p-SiO is fabricated more easily from porous SiO 2 due to the improved contact between SiO 2 and Mg atom. Moreover, high porosity of p-SiO facilitates the growth of carbon shell, making p-SiO@C with remarkable electrochemical properties . The reversible capacity for p-SiO@C (839.6 mA h g −1 , at 500 mA g −1 ) is about two times that for SiO 2 @SiO@C (426.4 mA h g −1 , at 500 mA g −1 ) after 110 cycles, and the synergetic properties of p-SiO@C further presents good cycling stability (777.1 mA h g −1 , at 500 mA g −1 after 300 cycles) and excellent rate capability (977 mA h g −1 , at 1000 mA g −1 ). The low-temperature fabrication of p-SiO followed by carbonization is promoting for practical application in high-performance Si-based lithium-ion battery.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Chen Xu,Jiang YuHan,Yang Jun,Peng ChengYun,Duan RongTing,Ni ChunMing,Mao FuChun,Li Bin
Monodisperse SiO 2 nanospheres (∼50–200 nm) were synthesized via a modified Stöber method involving hydrolysis and condensation reactions to generate SiO 2 templates. The SiO 2 surface bears negative charges through silanol (Si OH) groups, while positively charged ammonium ions (NH 4 + ) from the carbon precursor electrostatically self-assemble onto the SiO 2 surface, forming organic-coated SiO 2 nanospheres. Subsequent high temperature sintering under an argon atmosphere yields SiO 2 @C composite nanospheres. TEM and XPS confirm the spherical morphology, narrow size distribution, and the presence of a graphitized carbon layer. When applied as fingerprint developing powders on typical forensic substrates knife blades, rusted iron pieces and unpolished silicon wafer, the powders rapidly adsorb fingerprint residues and emit weak fluorescence under multi-band illumination, markedly enhancing the contrast of ridge details. The inherent chemical inertness and low cost of SiO 2 , combined with the optical scattering and fluorescence properties of the carbon coating, endow these nanocomposite powders with superior latent fingerprint visualization performance across diverse substrates, offering a highly efficient and environmentally friendly material for forensic evidence collection.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Wenbo Wu,Tianyi Liu,Yaqun Han,Yue Wu,Suli Wu
Structural colors are generated by some different mechanisms. Here, we prepared a kind of large-area structural color films using Cu₂O@SiO₂ microsphere as the coloring units. The film is prepared by infusing PDMS into a disordered structural template assembled from Cu₂O@SiO₂ microsphere, followed by thermal curing and peeling. The disordered Cu₂O@SiO₂ thin layers embedded in the film are obtained by a spraying method, which can generate vivid noniridescent structural colors due to the strong Mie scattering of Cu₂O@SiO₂ microsphere. Meanwhile, Cu₂O@SiO₂-polydimethylsiloxane composite films show excellent chemical stability and mechanical properties. Dynamic tuning of the structural color is achieved by covering the film surface with a liquid layer, which modulates the interfacial medium environment and alters the relative refractive index contrast between the medium and the scattering units. Notably, when applied as structural color writing paper, the film demonstrates good reversible writing and erasing performance. The simple color-changing mechanism and ease of large-area fabrication make it a promising candidate for rewritable colored paper applications.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 30
·2423538
·
IF 19
Yuqing Ou,Zu Chang,Siyu Yang,Yuanyuan Shu,Juzheng Zhang,Ran Tan,Qian Zhang,Xinping Ai,Kaifu Huo,Jiangfeng Qian
Silicon monoxide (SiO x , x ≈ 1) has emerged as a promising anode material for next-generation lithium-ion batteries (LIBs) due to its high theoretical capacity. However, its commercial viability is hindered by low initial Coulombic efficiency (ICE) and insufficient cycling stability. Herein, a mild chemical lithiation strategy is proposed that synergistically integrates lithium-compensation and carbon-coating to address these challenges, significantly boosting the electrochemical performance of SiO anode. Biphenyl-lithium/2-methyltetrahydrofuran (Bp-Li/2-MeTHF) is elaborately selected as a dual-functional chemical lithiation reagent to ensure sufficient lithium incorporation into SiO at room temperature and simultaneously biphenyl (Bp *− ) radical in-situ polymerizes, then is converted into a carbon shell on a silicon/lithium silicates core upon subsequent thermal annealing (Li-SiO@C). This unique structure of Li-SiO@C effectively compensates for irreversible lithium loss and buffers volume expansion, leading to an exceptional ICE of 91.0% and remarkable capacity retention of 92.2% after 500 cycles, far surpassing the 72.9% ICE and 9.0% retention observed in the pristine SiO anode. Moreover, Li-SiO@C demonstrates excellent moisture resistance that is well suited for aqueous-based electrode coating processes. This work presents a simple yet effective strategy to enhance the electrochemical performance of SiO anodes, offering strong potential for large-scale applications in high-energy-density LIBs.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Hu Kaihan,Cai Jiahui,Shi Zixu,Tan Xiaojun,Wang Li,Chen Jingbo,He Xiangming
Silicon dioxide (SiO₂), an anode material for lithium-ion batteries (LIBs), faces critical challenges such as irreversible phase transitions, severe volume expansion, and interfacial side reactions, leading to low initial Coulombic efficiency and poor cycling stability. To address these issues, this study proposes a novel design of SnO₂-based SiO₂ nanotubes composites (SiO₂/SnO₂) synthesized using ammonium tartrate as a water-soluble template. The hollow tubular structure effectively accommodates volume changes of SiO 2 during lithiation/delithiation, while SnO₂ component can contribute lithium storage capacity and improve the electrochemical reaction kinetics. The optimized SiO₂/SnO₂ composite exhibits a high discharge capacity of 778.07 mAh g⁻ 1 with a Coulombic efficiency exceeding 98% after 200 cycles at 1 A g⁻ 1 . Additionally, it demonstrates excellent rate capability, achieving 715.6 mAh g⁻ 1 at 1 A g⁻ 1 and recovering to 927.9 mAh g⁻ 1 when the current density returns to 0.1 A g⁻ 1 . The synergistic combination of structural engineering and SnO₂ functionality not only mitigates mechanical degradation but also enhances reaction kinetics. This work provides a scalable strategy for developing high-performance anode materials with improved energy density and long-term cyclability for advanced LIBs.
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 14
·1223
·
IF 4.4
Jian Yu,Chaoran Zhang,Xiaolu Huang,Leifeng Cao,Aiwu Wang,Wanjun Dai,Dikai Li,Yanmeng Dai,Cangtao Zhou,Yaozhong Zhang,Yafei Zhang
The wide utilization of lithium-ion batteries (LIBs) prompts extensive research on the anode materials with large capacity and excellent stability. Despite the attractive electrochemical properties of pure Si anodes outperforming other Si-based materials, its unsafety caused by huge volumetric expansion is commonly admitted. Silicon monoxide (SiO) anode is advantageous in mild volume fluctuation, and would be a proper alternative if the low initial columbic efficiency and conductivity can be ameliorated. Herein, a hybrid structure composed of active material SiO particles and carbon nanofibers (SiO/CNFs) is proposed as a solution. CNFs, through electrospun processes, serve as a conductive skeleton for SiO nanoparticles and enable SiO nanoparticles to be uniformly embedded in. As a result, the SiO/CNF electrochemical performance reaches a peak at 20% the mass ratio of SiO, where the retention rate reaches 73.9% after 400 cycles at a current density of 100 mA g−1, and the discharge capacity after stabilization and 100 cycles are 1.47 and 1.84 times higher than that of pure SiO, respectively. A fast lithium-ion transport rate during cycling is also demonstrated as the corresponding diffusion coefficient of the SiO/CNF reaches ~8 × 10−15cm2s−1. This SiO/CNF hybrid structure provides a flexible and cost-effective solution for LIBs and sheds light on alternative anode choices for industrial battery assembly.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yiqing Lu,Zhimin Zou,Yu Bai,Chunhai Jiang
Although SiO/G (G denotes graphite) products are commercially available in nowadays, their scalable applications in Li-ion batteries are still limited by their poor stability and high cost. Herein, niobium oxide (Nb 2 O 5 ) with open tunnel structure is composited with SiO in combination with N-doped carbon (NC) coating, which have jointly enhanced the rate and cycle performance of the resulting SiO@Nb 2 O 5 @NC composite anodes. Under optimum conditions, a capacity retention of 74% is preserved after 200 cycles at 0.2 A g −1 , together with a high capacity of 666 mA h g −1 at 3 A g −1 . Ex situ XRD analysis reveals that Nb 2 O 5 is transformed to amorphous Li x Nb 2 O 5 and electrochemical-inert NbO in the first lithiation process. The former exhibits fast Li + migration rate and capacitive Li ion storage behavior, which may help to improve the electrochemical performance of SiO. Further mixing the SiO@Nb 2 O 5 @NC composite with spent graphite extracted from used LiFePO 4 battery yields a high capacity and stable anode material that shows a high capacity retention of 79% after 500 cycles at 0.4 A g −1 . This work may shed a light on the development of stable yet low cost SiO/G anode materials through pre-modification of SiO with Nb 2 O 5 and utilization of cheap graphite resource.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Nan Zhou,Yufan Wu,Qing Zhou,Yiran Li,Shihan Liu,Hongbo Zhang,Zhi Zhou,Mao Xia
Silicon monoxide (SiO) is regarded as a great potential anode material for high-energy lithium-ion batteries (LIBs) owing to the high theoretical specific capacity (2650 mAh g −1 ), low voltage platform, eco-friendly and rich reserves. However, the particle pulverization , induced by large volume change during (de)lithiation, can result in the capacity degrading significantly. As we all know, it is a good strategy that using TiO 2 to modify the SiO-based anode. TiO 2 can serve as rigid outer layer to keep the structural integrity. In addition, the electrochemical performances of monoclinic TiO 2 (B) are better than anatase and rutile TiO 2 . Therefore, compositing with TiO 2 (B) is an admissible method to enhance the electrochemical properties of SiO-based materials. And the pretreated-SiO/TiO 2 (B) composites (abbreviated as p-STB) are prepared by hydrothermal treatment at 180 °C for 12 h and then calcined at 325 °C for 2 h. In this paper, p-STB-1 and p-STB-2 are prepared that the weight ratios p-SiO and TiO 2 (B) are 4:1 and 3:1, respectively. The structure and components of composites are also performed on X-ray diffraction (XRD), Fourier transform infrared reflectance (FT-IR) spectroscopy, scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). For p-STB, TiO 2 (B) is mainly covered on the surface of pretreated SiO (p-SiO). The Li-ion diffusion coefficients of as-prepared materials are calculated by cyclic voltammetry and electrochemical impedance spectroscopy . The electrochemical test results suggest that the p-STB-1 has batter cycling performance (730 mAh g −1 after 100th cycle) and admirable rate capacity (450 mAh g −1 under 3.2 A g −1 ). The modified method, which was compositing with TiO 2 (B), is beneficial to the commercialization of SiO-based materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Polish Journal of Chemical Technology
·
2024
·Vol. 26
·期 2
·25-30
·
IF 0.7
Lili Wan,Jie Yang,Xiaoru Liu,Jiayi Zhu,Gang Xu,Chenchun Hao,Xuecheng Chen,Zhengwei Xiong
A facile sol-gel procedure was employed to create refractive-index gradient SiO2 antireflective (AR) films. A monolayer film, characterized by the porous crosslinking framework, was fabricated with a designed volume ratio mixture both with colloidal silica suspension and soluble organic polysiloxane. The upper layer for the bilayer film was a hexamethylisilazane (HMDS) modified colloidal silica suspension, leading to the film surface transfer to hydrophobic. The strategic design of nanostructures in the bottom and upper layers resulted in a refractive-index gradient SiO2 film with enhanced AR properties. The bilayer film demonstrated a transmittance of 99.5% at 1064 nm, accompanied by a notable reduction in reflectivity. Moreover, the laser-induced damage threshold of the bilayer film was increased by 30%, rising to as high as 24.7 J/cm2. The SiO2 nanostructured film both showed a refractive-index gradient structure with excellent AR properties and exhibited good laser damage resistance.
研究领域:
光学材料
·
薄膜技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Fenghui Li,Hao Wu,Tianfu Zhao,Hong Wen,Wei Lin,Tianhao Wu,Fang Wang,Jie Zhou,Lianbang Wang
Coupling high-capacity silicon-based anode materials with ternary cathode materials is currently the most effective strategy to improve the energy density of lithium-ion batteries. However, the unstable interfaces between both electrodes and electrolyte impede this process. To address this issue, multifunctional additives incorporating Si O bonds have been widely adopted to bolster the stability of the solid/cathode electrolyte interface (SEI/CEI). Nevertheless, there is scanty research regarding the impact of the quantity and variety of functional groups within these multifunctional additives, which poses challenges for the efficient selection of additives and the tailoring of SEI/CEI. In this study, a series of multifunctional additives with Si O bonds were scrutinized, evaluating their chemical characteristics alongside their effects on the structural durability, interface properties, and electrochemical performance of silicon anodes. The results revealed that differences in molecular structure significantly affect their capacity to suppress LiPF 6 hydrolysis by eliminating HF/H 2 O through Si O bonds, with this capability being inversely correlated with the number of Si O bonds present. Moreover, excessive Si O bonds resulted in elevated molecular weight, increased internal resistance, and diminished cell longevity. Notably, additives containing aromatic rings, -CF 3 and C N groups enhanced the SEI robustness and extended the cycle life of silicon anodes. Further investigations demonstrated that this type of additive significantly improves the CEI stability of the NCM622 cathode. Consequently, it enabled an nSi║NCM622 full cell to retain 89.4 % of its capacity after 100 cycles at 1.0C. This study provides valuable insights into the strategic selection and effective utilization of multifunctional additives containing Si O bonds in silicon-based lithium-ion batteries.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 10
·772
·
IF 3.2
Zhou Xiang,Wu Yonghong,Li Zhaorui,Shang Zhihang,Zhu Shihao,Nie Lifang,Liu Juncheng
To address the susceptibility of porous Silica (SiO₂) antireflection coatings to ultraviolet (UV) degradation, this study introduces a dual-functional strategy incorporating methoxy polyethylene glycol (mPEG) as a porogen and lanthanum nitrate (La(NO₃)₃) as a UV-blocking agent via a sol–gel approach. Systematic investigations revealed that La(NO₃)₃ incorporation synergistically optimizes film architecture and spectral performance. Notably, the average transmittance of optimized films (0.3 wt% La 3 ⁺) in the 400–1100 nm range reached 93.1%, exhibiting a 4.57 percentage point enhancement compared to blank glass substrates (T ave = 88.5%). Mechanical characterization confirmed robustness, with a pencil hardness of 9 H and adhesive strength exceeding industry standards (tape-tearing grade 0). Furthermore, accelerated aging tests (5000 equivalent solar hours, ESHs) demonstrated superior photostability: while pristine films suffered a 1.22 percentage point transmittance loss, La 3+ -doped films retained 92.25% transmittance with minimal degradation (0.85 percentage point). Notably, the pencil hardness only decreased by 1 H (from 9 to 8 H) while maintaining a tape-tearing adhesion grade of 0. The enhanced UV resistance arises from La 3 ⁺-induced surface passivation and UV photon scattering in the short-wavelength regime, effectively mitigating photooxidative damage. This work advances the development of durable, transparent UV-blocking coatings for optoelectronic and architectural applications.
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DOI
高影响因子
危险品化学品经营许可证（带存储）