ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wei Tian,Yong Li,Junjie Zhou,Tao Wang,Runhao Zhang,Jinchao Cao,Mingfu Luo,Ning Li,Na Zhang,Hongyu Gong,Jingjing Zhang,Lei Xie,Biao Kong
Transient supercapacitors (TSCs), a new type of advanced supercapacitor (SC) that can completely dissolve with environmentally and biologically benign byproducts in vivo after performing their specified function, have broad application prospects in the fields of green electronics, implantable devices, personalized medicine, military security, and other fields. However, research on TSCs is still in its infancy, and there are still many challenges to be solved, such as the complex preparation process and low energy density. Herein, we report a facile superassembly manufacturing method for an implantable and fully biodegradable three-dimensional network Zn@PPy hybrid electrode by screen printing and electrochemical deposition. The produced superassembled interdigital pseudocapacitor exhibits superior electrochemical performances due to the high capacitances and excellent rate performances of the pattern Zn@PPy electrode and NaCl/agarose electrolyte. An optimized biodegradable SC exhibits a maximum energy density of 0.394 mW h cm–2 and can be fully degraded in vivo in 30 days without any adverse effects in the host organism. This work provides a new platform for transient electronic technology for diverse implantable electronic applications.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Xiaorong Fang,Pu Cheng,Kai Sun,Yujun Fu,Dequan Liu,Deyan He
Lithium–sulfur (Li–S) batteries have aroused extensive attention owing to the high theoretical capacity and energy density; however, their practical applications are impeded by the insulation of sulfur and lithium sulfides and the shuttle effect of lithium polysulfides (LiPSs). Here, zinc–nitrogen codoped carbon (ZnNC) nanofibers with pea-shaped voids were fabricated as an interlayer of Li–S batteries. It was found that the ZnNC nanofibers can anchor LiPSs and catalyze their redox conversion effectively. The cross-linked ZnNC nanofiber interlayer acting as an upper current collector can enhance the electron transfer and accelerate the lithium ion diffusion. The combined effects of the addition of the ZnNC nanofiber interlayer endow the Li–S batteries with high capacity, high-rate performance, and long cycle stability. The initial capacity is 1198.5 mAh g–1 at 0.5 C for the cell with a sulfur loading of about 1.0 mg cm–2. After 500 cycles at 1 C, a capacity of 694.1 mAh g–1 is retained with a low capacity fading of 0.073% per cycle. When the sulfur loading is 6.19 mg cm–2, the capacity reaches 754.8 mAh g–1 after 100 cycles at 0.2 C.
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高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 17
·4683-4690
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IF 5.976
Bingyan Zhu,Wenyu Ji,Zongquan Duan,Yang Sheng,Ting Wang,Qilin Yuan,Han Zhang,Xiaosheng Tang,Hanzhuang Zhang
During the last three decades, there has been significant development of quantum dot light emitting diodes (QLEDs) due to their widespread applications. However, common QLEDs depend on cadmium, which is toxic and limits their all-inclusive applications. To address this challenge, herein, we report a highly efficient and low turn-on voltage Cd-free inverted QLEDs with eco-friendly Zn–Ag–In–S quantum dots as the emissive layers. The device performance is closely related to the properties of the hole transport layer (HTL), which are explored by employing different hole transport materials, namely, 4,4′,4′′-tris(carbazol-9-yl) triphenylamine (TCTA) and N,N′-bis(naphthalen-1-yl)-N,N′ bis(phenyl)-benzidine (NPB). Although the energy levels of the lowest unoccupied molecular orbitals (LUMO) of TCTA and NPB are similar, electron leakage from the QDs to NPB is observed, which deteriorates the device performance. An excellent QLED can be achieved if a thick TCTA layer is introduced next to the QDs. Additionally, the QLED with a stepwise HTL consisting of TCTA/NPB presents a slightly higher current efficiency than the TCTA-only device, revealing that the reduction in holes accumulated at the QDs/HTL interface is beneficial for enhancing the device efficiency. Compared to the previously reported Zn–Ag–In–S based QLEDs, our device exhibits a low turn-on voltage of 2.2 V and the highest luminance (over 2000 cd m−2) and efficiency (larger than 2.1 cd A−1).
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 11
·7470-7484
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IF 3.5
Burhan Ullah,Millicent Appiah,Yuting Xiao,Yixing Yang,Daniel Q. Tan
Ba 1 − x Sr x Mg 2 − y Zn y V 2 O 8 compounds, abbreviated as BSMZVO@ xy ( x = 0.0–0.2 and y = 0.02), were synthesized with tetragonal structures. The microstructure, molecular structure, and polarization mechanism were investigated using X-ray diffraction, electronic microscopy, Raman spectroscopy, and vector network analyzer. The sintering temperatures (<900°C) and microwave dielectric properties of BSMZVO are significantly impacted by (Sr/Zn) 2+ substitution and TiO 2 mixing. The BSMZVO@ xy ( x = 0.15 and y = 0.02) exhibited encouraging ε r (12.4–12.7), Q × f (40 054–40 973 GHz), and temperature coefficient of resonance frequency ( τ f ∼ −5.2 to 0.0 ppm/°C) after sintering at 860°C/4 h and 800°C/4 h. For the first time, TiO 2 was added to enhance the density and Q × f value without degrading τ f . The 0.25 wt.% TiO 2 resulted in optimum ε r of 13.4, Q × f of 43 636 GHz, and τ f of +1.8 ppm/°C after sintering at 760°C/4 h. The improved quality factor ( Q × f ) is linked to the Raman A 1g mode and relative density.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Haoran Li,Jiao Wang,Yanping Wang,Aimei Zhao,Bing Li,Wei Li
The band gap of CdS (E g = 2.4 eV) was narrow, which made it unable to transmit short-wave sunlight through the CIGS absorber layer. Zn(O,S) thin film , prepared by doping O into ZnS, had a wider band gap, and the raw material was green and non-toxic, making it suitable as a buffer layer for solar cells. However, CBD-Zn(O,S) usually takes longer than CdS deposition. In this work, By shortening the deposition time through the fast hydrolysis of TAA . Na 3 NTA was added in the solutions to improve the quality of Zn(O,S) thin films. The effect of Na 3 NTA concentration on the complex ion contents was investigated. When Na 3 NTA was added at a concentration of 0.04 M along with TAA (0.04 M), the film had a high T% of 88.6%, E g of 3.76 eV, and a dense grain distribution. ZnS and ZnO grew at (111) and (100) crystals, respectively. Raman and XPS analyses showed the existence of Zn–S and Zn–O bonds, indicating the high crystalline quality of the Zn(O,S) thin films prepared with CBD. Finally, when the optimal concentrations of ZnSO 4 , NH 4 OH, Na 3 NTA, and TAA were 0.04 M, 0.48 M, 0.04 M, and 0.04 M, respectively, the prepared Zn(O,S) thin films could be used as a cadmium-free buffer layer for solar cells.
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 21
·7644-7651
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IF 5.7
Zechao Xu,Weiyi Lu,Kelan Yan,Runhua Fan,Ningzhong Bao
Single-phase metamaterials are a group of attractive alternatives to ordered double negative metamaterials (DNMs) that exhibit negative permittivity (ε < 0) and negative permeability (μ < 0) with periodic unit cells. However, achieving double negative electromagnetic properties in a single-phase material in the radio-frequency range is challenging. This study presents the synthesis of the single-phase metamaterial, selenospinel CuxZn1−xCr2Se4, from metallic powders through a simple solid-state reaction process. The double negative values of ε and μ were observed in the frequency range of 484–1000 MHz for Cu0.8Zn0.2Cr2Se4 (x = 0.2) and 638–1000 MHz for Cu0.6Zn0.4Cr2Se4 (x = 0.4). The negative value of ε is attributed to the plasmonic state of delocalized carriers in the metallic ferromagnetic CuCr2Se4 and can be described using the Drude model. The suppression of magnetic resonance induced by the eddy current was alleviated through appropriate doping of the Zn element. Based on the skin effect, a theoretical model was constructed to elucidate the magnetic resonance-dependent negative permeability. In this study, metallic ferromagnetic chalcospinels are introduced into the field of single-phase DNMs, which significantly broadens the range of metamaterials. Furthermore, this study contributes to the theoretical understanding and tuning mechanism of double negative properties.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jianyue Yan,Peng Liu,Jiawen Li,Hao Huang,Shengfu Tong,Wenbo Song
The electrocatalytic nitrate reduction reaction to ammonia (NRA) offers a promising alternative to traditional ammonia synthesis methods. In nature, enzymes containing molybdenum and iron sites catalyze the reduction of nitrate and nitrite ions. Drawing inspiration from these enzymes, we synthesized a carbon-coated nano-octahedra of FeMo-based nitride (FeMoN@C NO) by pyrolyzing phosphomolybdic acid hydrate (POM) doped Fe-NH 2 -MIL-101 to catalyze NRA. Experimental results demonstrate that in an alkaline environment, FeMoN@C NO exhibits a suitable hydrogen evolution reaction (HER) capacity, and the protons or hydroxyls produced effectively facilitate the hydrogenation reaction in the ammonia synthesis process. Additionally, the introduction of Mo increases the number of active sites and effectively reduces the thermodynamic barrier in NRA, thereby enhancing the rate of ammonia synthesis. As a result, FeMoN@C NO displays outstanding NH 3 Faradaic efficiency (FE) of 98.2 % and an NH 3 yield of 434.16 µmol/h cm −2 . Building upon the excellent electrocatalytic properties of FeMoN@C NO, a new Zn-nitrate battery system is assembled in this work, which exhibits an outstanding peak power density of 3.23 mW cm −2 and an FE of 91.58 % for NH 3 production. This work provides a new perspective for designing enzyme-mimicking nitrate reduction catalysts and broadens the application of Zn-based batteries.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xia Wei,Yuhan Zhou,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is essential for direct hydrazine fuel cells and offers a promising alternative to the kinetically sluggish oxygen evolution reaction in water splitting. In this work, we present the design and synthesis of a novel Ni-Zn-Cu catalyst with a three-dimensional (3D) interconnected hollow network structure for HzOR. This unique 3D hollow architecture, comprising Ni-Zn-Cu nanosheets, significantly enhances HzOR catalytic performance by increasing the number of accessible active sites and improving both mass and charge transport. Additionally, the incorporation of multifold nanotwins within the catalyst induces lattice strain and reduces coordination numbers, optimizing the electronic structure and d -band center to strengthen hydrazine adsorption and catalyst reactivity. The Ni-Zn-Cu catalyst exhibits remarkable HzOR performance, achieving a current density of 200 mA·cm −2 , and a mass activity of 10,129 A·g −1 at −0.05 V vs. RHE, and a low onset potential of −0.15 V vs. RHE. Furthermore, it retains 96 % of its initial activity after 20 h of continuous electrolysis. This work marks a significant advancement in the development of highly efficient and durable HzOR catalyst.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Tingfei Yang,Na Chen,Anqi Li,Anrui Feng,Yihan Li,Yaru Qin,Xue Qin,Chenglong Shi
P2-Na 0.67 Ni 0.33 Mn 0.67 O 2 cathode material is considered as an ideal cathode material for sodium-ion batteries due to its high capacity. However, it has P2-O2 phase transition, which leads to fast capacity decay. This paper investigates the effect of Zn/Al co-substitution on their chemical-electrical properties. The experimental results show that this strategy successfully transforms the unfavorable P2-O2 phase transition that occurs in the material during cycling into a reversible P2-OP4 phase transition, and the reversible capacity and capacity retention of the P2-type cathode material are significantly improved. It maintains a high energy density of up to 444 Wh·Kg −1 in the first five charge/discharge cycles, facilitating the future practical implementation and commercialization of the material.
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高影响因子
CARBON
·
2025
·
IF 11.6
Fei Yang,Haixia Su,Yunqin Yang,Zhaodi Shen,Chun Zhang,Linwei Zhang
Exploring flexible, porous, efficient, and stable cathodic electrocatalysts is crucial for the development of ZABs. In this study, an effective porous and flexible carbon nanofiber catalyst (Fe-ZCNF) was successfully constructed via electrospinning. PAN was used as the spinning substrate material, and hemin was incorporated to create the main active sites, while a NaCl molten salt-assisted ZIF-8 templating strategy was employed to form a connected pore structure. The Fe-ZCNF possesses an interconnected hierarchical porous structure and a high specific surface area of 1035.5 m 2 g −1 . Compared with commercial Pt/C (20 wt%), the E 1/2 = 0.88 V vs . RHE for ORR of Fe-ZCNF shifted positively by 20 mV, and a significant improvement in stability was observed. The ZABs assembled using Fe-ZCNF as the cathode exhibits excellent performance, with an OCV of 1.59 V and a power density of 179.2 mW cm −2 , which are superior to those of Pt/C + RuO 2 , along with a cycling stability of up to 200 h. Additionally, Fe-ZCNF can be used as the air cathode for FZABs, demonstrating high specific capacity and good cycling stability under different bending conditions. This work provides valuable insights into the design of flexible catalysts, potentially advancing the development of flexible electronic devices.
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高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Hong Wang,Yutao Wang,Yao Pang,Yuxing Wang,Chenhuan Lai,Daihui Zhang,Yupeng Liu
Flexible solid-state supercapacitors show significant potential for wearable electronics; however, achieving simultaneous mechanical robustness and high ionic conductivity remains challenging. In this work, a polyacrylamide (PAM)/cellulose nanocrystal (CNC)-based hydrogel electrolyte loading with carboxymethyl cellulose (CMC) is engineered to address this limitation (PAM/CNC-CMC-Zn 2+ ). Incorporating CNC improved the mechanical properties of hydrogels, while subsequently adding CMC-Na enriched with hydrophilic groups (─OH and ─COO − ) into PAM/CNC hydrogels disrupted hydrogen-bond networks within the ZnSO 4 electrolyte, thereby optimizing Zn 2+ solvation sheath structure. This modification suppressed corrosion currents and minimized side reactions. The hydrogel demonstrated outstanding mechanical properties, including a tensile strength of 0.22 MPa, high stretchability (1452.1%), and remarkable fracture toughness (0.98 MJ m −3 ). The zinc-ion capacitors (Zn // PAM/CNC-CMC-Zn 2+ // AC) demonstrate exceptional electrochemical performance, achieving a significant specific capacitance of 151.4 F g⁻¹ at 0.5 A g⁻¹, coupled with a remarkable power density of 1150 W kg⁻¹ (at 10.9 Wh kg⁻¹). Notably, the device exhibits outstanding performance stability, maintaining its functionality under mechanical folding and retaining its efficiency after 10 000 long charge–discharge cycles. These multiscale cellulose-based design highlights the hydrogel electrolyte's dual functionality in balancing mechanical adaptability and electrochemical efficiency, offering a potential solution for next-generation wearable energy storage systems.
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DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2025
·
IF 9.2
Xueqi Liu,Jingmin Ge,Shiying Li,Huanhuan Yang,Huiwen Tian,Hongpo Liu,Yaxi Li,Xiaoli Zheng,Yapeng Tian,Xinwei Cui,Qun Xu
Identification of the active sites for zinc oxide-derived catalysts and further elucidation of the catalytic mechanism for electrochemical CO2 reduction reaction (CO2RR) are limited by the dynamic structural evolution at real reaction conditions. Herein, we focus on the structural evolution of ZnO-T at the initial stage of CO2RR. ZnO-T undergoes in situ reduction to Zn within dozens of minutes, which is followed by reoxidation of the out layer. As a result, core-shell-like Zn@ZnO-T with controllable Zn-ZnO interfaces and oxygen vacancies is obtained depending on the temperature-controlled annealing and electrochemical pre-treatment. Zn-ZnO interfaces alter the energy band structure of ZnO layer, while oxygen vacancies modify the electron density of Zn sites. Thus, the obtained Zn@ZnO-T improves charge transfer, facilitates CO2 activation, and lowers energy barrier for *COOH and *CO intermediates formation. Expectedly, Zn@ZnO-T demonstrates excellent CO2RR performance for CO production with FE up to 92.1% at −1.2 V (vs. RHE) and a current density of −12.7 mA∙cm−2. In particular, Zn@ZnO-650 delivers a high FECO above 85% over a wide potential range from −1.0 to −1.3V (vs. RHE). This study provides a new compass for mechanistic investigation on relationship between intrinsic structure and catalytic performances, guiding the rational design of high-performance heterogeneous catalysts.
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高影响因子
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