Small
·
2025
·
IF 12.1
Ming Li,Xiongwei Gong,Yilong Hu,Yi Shuai,Yunong Zhou,Mingliang Wu,Xiaoyi Huangyang,Jinqi Huang,Yingpeng Wu
Due to the abundant availability of Na resources, Na batteries garner significant attention. Anode-free Na batteries, devoid of active negative materials, are deemed promising candidates for the next generation of high-energy-density Na batteries. The cyclic stability of anode-free Na batteries primarily hinges on the stability of the limited Na supplied by the cathode, and the design of the anode substrate plays a pivotal role. In this study, a cost-effective aluminum–tin eutectic alloy substrate is developed using a straightforward melting process. In eutectic alloy, tin element is present in its metallic form, which facilitates the disruption of the compactness of the Passivation film (Al 2 O 3 ). Besides, tin metal and tin dioxide on the surface of the eutectic alloy show a strong Na affinity (strong binding energy with Na atom and lower Na nucleation barrier), thereby promoting the uniform nucleation of sodium. This eutectic alloy substrate enables highly reversible Na plating/stripping with an average coulombic efficiency of 99.97%, and the cycle life exceeds 4000 cycles. Coupling with Na 3 V 2 (PO 4 ) 3 , the AlSn-2%-NVP full cell exhibits a capacity retention of up to 81% after 100 cycles, significantly outperforming coated carbon aluminum foils and aluminum foils. This study introduces an efficient approach to the anode-free Na battery.
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
ACS Photonics
·
2025
·
IF 6.7
Yanshu Shi,Jianhua Zhu,Xuekun Wang,Yiqian Wang,Qinghao Song,Lei Chen,Yumin Song,Wei Wu,Tingting Guo
Topological Photonics, exploring the topologically nontrivial states in photonics, is a fast-progressing research topic. Topological flat bands, fascinating features in topological photonics, have attracted much attention recently. Metal-phthalocyanine (MPc) molecular semiconductors are formed by molecular chains, offering a great platform to study topological states in low dimension. Previous work shows that the MPc molecular chain could be used to realize one-dimensional topological excitons based on the two-level systems. Therein, the topological flat band is a key feature in this type of topological excitons. Here, we have synthesized tin-phthalocyanine (SnPc) nanosheets. The ultraviolet–visible (UV–vis) and photoelectric experiments on these SnPc nanosheets are performed to characterize the one-dimensional topological flat bands. We demonstrate the strong evidence that the two photocurrent peaks at the wavelengths of 455 and 850 nm could originate from the topological flat bands within the B- and Q-spectral regions, respectively, according to our excitonic model. In addition, the photocurrent is improved by up to two orders using the nanosheets compared to the raw materials. Moreover, the previous excitonic model consisting of two-level systems is further generalized to incorporate both the B- and Q-bands by using three-level systems, interpreting the UV–vis spectra and the photocurrent peaks properly. The combination of our experimental and theoretical research shows that the stable and high broadband photoelectric performance of the SnPc nanosheets not only provides a new material platform for the organic photodetectors but also opens up a new research avenue for the observation of the topological flat band using molecular materials.
研究领域:
拓扑光子学
·
凝聚态物理
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材料科学
·
光电子学
·
分子半导体
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Junjie Feng,Nana Chen,Hao Min,Mian Dai,Yangdi Huang,Chengcheng Wang,Ruishan Wang,Jingya Lai,Xinrui Wang,Shi Hu,Jinfeng Yu,Yue Liu,Jin Chang,Wei Huang,Jianpu Wang
Controlling the crystallization dynamics of solution-processed tin perovskites remains pivotal yet challenging for achieving high-performance lead-free optoelectronic devices. Herein, it is demonstrated that substrate-regulated interfacial nucleation governs crystal growth orientation and film quality of tin perovskites. The results show that pristine PEDOT:PSS substrates induce bottom-interface-dominated nucleation via strong PEDOT + -[SnI 3 ] n n− interactions, driving rapid upward crystallization of tin perovskites and yielding rough films with low photoluminescence quantum efficiency (PLQE: ≈26%). Strategic substrate modification with potassium citrate (PC) weakens the PEDOT + -[SnI 3 ] n n− interactions, thereby redirecting nucleation initiation to the top interface during solvent evaporation. This results in controlled downward crystallization of tin perovskites, forming smooth films with improved crystallinity and superior optoelectronic properties (PLQE: ≈41%). The optimized tin perovskite light-emitting diodes (LEDs) achieve record-breaking performance with an external quantum efficiency of 12.8% and a maximum radiance of 190 W sr −1 m −2 , which is the highest performance reported for tin perovskite near-infrared LEDs to date. This work demonstrates interface-directed crystallization control as an effective strategy for achieving high-performance tin perovskite optoelectronic devices.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2011
·Vol. 13
·期 6
·2071-2076
·
IF 4.006
Weimin Du,Dehua Deng,Zhitao Han,Wei Xiao,Cheng Bian,Xuefeng Qian
Single-crystalline, hexagonal tin disulfide (SnS2) nanoplatelets were successfully synthesized through an improved solvothermal process with SnCl4·5H2O and carbon disulfide (CS2) as precursors. The crystal phase, morphology, and crystal lattice of the prepared products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM), respectively. Results reveal that the synthesized SnS2 nanoplatelets are in the hexagonal structure with 20–60 nm in diameter and 7–10 nm in thickness. The structural and HRTEM analysis indicates that the formation of SnS2 nanoplatelets with hexagonal morphology result from the accelerating growth of six energetically equivalent high-index crystalline planes {110} and the retarded growth of {001} crystalline planes. The photocatalytic degradation properties of hexagonal SnS2 nanoplatelets driven by solar light were further investigated with Rhodamine B (RhB) as simulating pollutant. Results show that these SnS2 nanoplatelets have a good performance of photocatalytic degradation on RhB, and the decolorizing rate can reach 97.7% after being irradiated for 70 min by solar light. Better photocatalytic properties indicate that hexagonal SnS2 nanoplatelets are a type of promising photocatalyst driven by solar light and have potentially applied prospects in wastewater treatment and environmental protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiao-Yan Ma,Xing Yang,Jing Feng,Zhen-Hua Ge
Wide-band-gap semiconductor photocatalytic materials are limited in their application because they can only absorb ultraviolet light, while tin selenide (SnSe) with a narrow band gap is a promising photocatalyst that responds to visible and near-infrared light. Herein, pure SnSe nanopowders with a narrow band gap were synthesized by regulating the reaction temperature in the process of hydrothermal reaction. The powder samples showed self-assembled micrometer flowers of nanosheets and nanorods, which facilitated the degradation of contaminant dyes by increasing the length of the light path. The properties of the photocatalytic degradation of rhodamine B (RhB) by the SnSe powders synthesized at a temperature gradient of 20 °C from 80 to 120 °C were investigated. The results show that the degradation rate of RhB reached 98.2% in 60 min by pure SnSe powder prepared at 100 °C (SnSe-100), which was attributed to the “light trapping effect” created by its unique and intact micron-flower structure. In addition, degradation experiments were also carried out on common organic dyes, in which the decomposition rate of methylene blue reached 92.86%. This can be applied to the treatment of water pollution and provides a quick solution.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境污染治理
·
半导体物理
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2018
·
IF 9.89
Wang Zhao,Ping Li,Zhiwei Liu,Donglin He,Kun Han,Hailei Zhao,Xuanhui Qu
The liquid metal battery (LMB) is an attractive chemistry for grid-scale energy-storage applications. The full-liquid feature significantly reduces the interface resistance between electrode and electrolyte, endowing LMB with attractive kinetics and transport properties. Achieving a high energy density still remains a big challenge. Herein, we report a low-melting-point antimony–bismuth-tin positive electrode for LMB with high energy density and excellent rate performance for the first time. The electromotive force of Li||Sb–Bi–Sn system is determined by Li||Sb and Li||Bi chemistries. The Sn component plays a bifunctional role in the chemistry, decreasing the melting point of Sb–Bi–Sn alloy and providing rapid lithium diffusion paths for the electrode reaction. The ternary feature of the positive electrode ensures a low Sn concentration for the eutectic requirement of the positive electrode working at moderate temperature (500 °C). The stepwise reaction characteristics of Sb and Bi provides a dynamic microstructure change of intermediate compounds during the charge/discharge process, allowing the electrolyte to penetrate and make contact with the positive electrode to enable a fast electrode reaction. A synergetic combination of these advantages enables the reported Sb–Bi–Sn electrode to demonstrate a high energy density of about 260 Wh kg–1 and excellent rate capability with almost no capacity degradation at different current densities from 200 to 1200 mA cm–2. All these excellent properties demonstrate that the Sb–Bi–Sn alloy is an ideal positive electrode of LMB for large-scale applications.
研究领域:
储能技术
·
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2021
·
IF 3.382
Wei-Long Xu,Hongchun Yuan,Xiao-Yu Yang,Yannan Zhang,Min Zheng
Tin-based perovskites are the promising alternative applications in environment-friendly optoelectronic devices when compared with Pb-based perovskites . All-inorganic tin-based perovskite (CsSnBr 3 ) films were prepared by chemical vapor deposition (CVD) method. The film deposited at 500 °C shows high crystalline quality with the grain size close to 1 μm and uniform surface coverage. The optical properties of CsSnBr 3 film were investigated by steady-state and time-resolved photoluminescence spectra in detail. The short photoluminescence lifetime may be attributed to the defects at the molecular level rather than the grain boundaries. Consequently, the photodetector based on CsSnBr 3 film exhibits good stability and high on/off ratio about 320.
研究领域:
材料科学
·
光电子学
·
光子学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 26
·4694-4699
·
IF 3.545
Xiancheng Meng,Chao Fan,Xia An,Shuo Yuan,Yongkai Jing,Zhe Liu,Chun Sun,Yonghui Zhang,Zihui Zhang,Mengjun Wang,Hongxing Zheng,Erping Li
Tin disulfide has attracted enormous interest due to its excellent optical and electronic properties for future optoelectronic applications, especially high-performance photodetectors. Nevertheless, SnS2-based photodetectors still face great challenges for practical applications, such as low responsivity and slow response speed. Herein, the enhanced photoresponse characteristics of aluminum (Al)-doped SnS2 nanosheets were investigated. Al-doped SnS2 nanosheets were synthesized by using a convenient and high-yield hydrothermal technique, and high purity and high crystallinity were confirmed by SEM, XRD, Raman spectroscopy, XPS, and TEM. Al atoms were homogeneously introduced into SnS2 nanosheets, leading to a slight increase in lateral size from 185.4 nm to 196.9 nm and thickness from 13.5 nm to 17.9 nm. Then, photodetectors based on Al-doped SnS2 nanosheets were built and characterized. Compared to pristine SnS2, the photoresponse performance of the Al-doped SnS2 nanosheets was significantly improved. In particular, the response time was reduced by nearly two orders of magnitude from 1040 ms to 51 ms. The responsivity was increased one hundredfold, from 0.79 mA W−1 to 15.16 mA W−1. The photoresponse characteristics are prominently enhanced due to Al-doping induced band gap narrowing. Our findings provide an effective approach to improve the photoresponse performance of SnS2 and pave the way for further optoelectronic applications of SnS2.
研究领域:
材料科学
·
纳米科技
·
光电子学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 15
·4517
·
IF 4.412
Ye Tian,Qi Wang,Zhijian Peng,Shundong Guan,Xiuli Fu
A novel product consisting of a homogeneous tin oxide nanowall array with abundant oxygen deficiencies and partial Ni-Sn alloying onto a Ni foam substrate was successfully prepared using a facile solvothermal synthesis process with subsequent thermal treatment in a reductive atmosphere. Such a product could be directly used as integrated anodes for supercapacitors, which showed outstanding electrochemical properties with a maximum specific capacitance of 31.50 mAh·g−1at 0.1 A·g−1, as well as good cycling performance, with a 1.35-fold increase in capacitance after 10,000 cycles. An asymmetric supercapacitor composed of the obtained product as the anode and activated carbon as the cathode was shown to achieve a high potential window of 1.4 V. The excellent electrochemical performance of the obtained product is mainly ascribed to the hierarchical structure provided by the integrated, vertically grown nanowall array on 3D Ni foam, the existence of oxygen deficiency and the formation of Ni-Sn alloys in the nanostructures. This work provides a general strategy for preparing other high-performance metal oxide electrodes for electrochemical applications.Keywords:integrated anode;supercapacitor;nanowall array;oxygen-deficient tin oxide;Ni-Sn alloys
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2019
·Vol. 73
·期 8
·1863-1869
·
IF 1.246
Zhuang Huajian,Wang Chan,He Fufeng,Song Qijun
Brass is a metallic alloy that is made of copper and zinc and has a gold-like appearance. Tin coating could endorse the brass with yellowish up to silver-white color and improve its surface durability. In the present work, electroless plating of tin on the brass surface was investigated aiming to obtain a stable and controllable colored surface. In the presence of thiourea, the open circuit potential of brass (− 0.652 V) is more negative than that of tin (− 0.532 V), which makes the deposition of tin on brass feasible. The surface morphology and composition of the coatings were characterized by scanning electron microscope and energy dispersive spectrometer and the results indicated that a large number of tin clusters were formed on the brass surface. The amount of tin clusters determined the color of the coated surface, which can be facilely tuned by the plating time. The UV/Vis diffuse reflectance spectra were used for monitoring the changes of color at different plating time. The results show that there is a good linear correlation ( R 2 = 0.9948) between the absorbance and the plating time, which can be used to control the extent of tin plating on brass. Finally, the cross-cut test showed that the Sn particles were firmly coated on the brass substrate.
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 THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Lei Han,Longhao Dong,Faliang Li,Hongjuan Duan,Haijun Zhang,Guangqiang Li,Quanli Jia,Shaowei Zhang
Recently, high-performance ceramic aerogels (CAs) have become a research hotspot because of their multi-functional properties. Compared to their oxide counterparts, non-oxide CAs show better thermal shock resistance and other high-temperature properties, making them suitable for applications in harsh environments. In this work, Si 3 N 4 -BC x N-TiN ceramic aerogels (SBCNT CAs) with molar ratios of B/C/Si/Ti = 2:1:5:5 were synthesized at 1623 K for 3 h via foam-gelcasting, from Si, Ti, melamine and boron acid raw materials. The prepared SBCNT CAs containing 91.0% porosity exhibited the highest compressive strength up to 1.0 MPa, and thermal conductivity of 0.144 W/(m·K) at 298 K. They also exhibited excellent service performance at 1473 K in Ar, demonstrating their great potential for high-temperature applications.
研究领域:
材料科学
·
无机非金属材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Rongcheng Peng,Yang Gao,Hussein A. Younus,Yan Zhang,Wenpeng Ni,Shiguo Zhang
Upgrading CO2 to formate systems is a promising avenue for fuel production, and SnOx is a unique low-cost candidate for this conversion. However, the high oxygen affinity of Sn sites leads to a strong adsorption of O-bound intermediates, resulting in a low efficiency of CO2 reduction. Herein, density functional theory (DFT) calculations confirmed that a H-doping strategy of SnO2 produces partially depleted positive charge Sn sites, weakening the adsorption of HCOO* and boosting the electron transfer kinetics. Experimentally, H-doped commercial SnO2 nanoparticles (H-SnO2) indeed had enhanced intrinsic activity for CO2-to-formate conversion with suppressed hydrogen evolution performance. Remarkably, H-SnO2 achieves over 90.0% formate selectivity within −0.6 to −1.0 V (vs RHE) at the industrial current density of 220 mA cm–2. Electrochemical measurements and in situ Raman spectra analysis together disclosed that H-doping speeds up the kinetic rate for the first electron transfer of CO2 reduction and also promotes formate desorption, resulting in the impressively high current density and selectivity of H-SnO2.
研究领域:
材料科学
·
电化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）