ENERGY & FUELS
·
2022
·
IF 4.654
Long Qing,Rui Li,Wei Su,Wei Zhao,Yuming Li,Ge Chen,Naiqiang Liu,Jian Chen
Stannous sulfide (SnS) still faces the challenge of dramatic volume changes during discharge/charge, which results in the appearance of fractures and pulverization of the electrode and rapid capacity attenuation of the sodium-ion batteries (SIBs). To handle this issue, SnS nanoparticles are embedded in nitrogen-doped carbon nanofibers (N-CNFs) during the calcination of electrospun nanofibers to construct nanostructures of SnS/N-CNFs, which are directly used as anodes for SIBs. The carbon structure formed by electrospun nanofibers restricts the growth of SnS, promotes uniform dispersion of SnS, and prevents the volume effect of SnS during the charge and discharge in SIBs. Moreover, the SnS/N-CNFs are interconnected to form a three-dimensional (3D) network, thus revealing a high degree of flexibility and an ability to withstand repeated 180° bending and loads hundreds of times heavier than itself. In addition, SnS/N-CNFs also form an interconnected 3D conductive network. Benefiting from the confinement of N-CNFs, the SnS/N-CNFs provide a high capacity and excellent cycling performance of 422 mA h g–1 at a current density 100 mA g–1 after 150 cycles and maintain a reversible capacity of 292 mA h g–1 even at high current density of 500 mA g–1. The outstanding flexibility and enhanced electrochemical performance of free-standing SnS/N-CNFs would make them potential anodes for flexible SIBs.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Bin Xu,Chuanhe Ma,Xiaoshuang Lu,Yulin Liu,Qiao Zhang,Ye Chen,Pingxiong Yang,Junhao Chu,Lin Sun
Cu 2 ZnSn(S,Se) 4 (CZTSSe) has received considerable attention as the promising absorber for thin-film solar cells. For traditional selenization process, the issues of Sn-loss, lower S/(S + Se) ratio, and unsuitable back contact interface extensively exist in CZTSSe solar cells. In present work, SnSe and SnS powder is introduced during selenization process, respectively. The effects of SnSe and SnS powder on CZTSSe films and the Mo/CZTSSe interface have been comprehensively studied. We discover that SnS not only can provide the Sn-contained vapor in selenization process but also offer S-vapor. Due to the presence of Sn-contained vapor, the number of voids in the CZTSSe absorber and Mo/CZTSSe interface decreases remarkably and the Sn-loss is effectively suppressed. The thickness of Mo(S,Se) 2 layer is significantly reduced, and the S/(S + Se) ratio in CZTSSe bulk obviously increases owing to the presence of S-vapor. As a consequence, the open-circuit voltage and fill factor of the solar cell significantly increase and the CZTSSe solar cell with efficiency of 10.07% (total area) is successfully fabricated.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Heliyon
·
2023
·
IF 4
Yang Shuai
Phototherapy has attracted widespread attention for cancer treatment due to its noninvasiveness and high selectivity. However, severe hypoxia, overexpressed glutathione and high levels of hydrogen peroxide (H 2 O 2 ) of tumor microenvironment limit the antitumor efficiency of phototherapy. Herein, inspired by the specific response of nanozymes to the tumor microenvironment, a simple and versatile nanozyme-mediated synergistic dual phototherapy nanoplatform is constructed. In this study, tin ferrite (SnFe 2 O 4 , SFO) nanozyme as a photosensitizer was surface modified with polydopamine (denoted as P-SFO) and incorporated into poly( l -lactide) to fabricate an antitumor scaffold fabricated by selective laser sintering. On one hand, SFO nanozyme could act as a photoabsorber to convert light energy into heat for photothermal therapy (PTT). On the other hand, it played a role of photosensitizer in transferring the photon energy to generate reactive oxygen species (ROS) for photodynamic therapy (PDT). Importantly, its multivalent metal ions redox couples would decompose H 2 O 2 into O 2 for enhancing O 2 -dependent PDT and consume glutathione to relieve antioxidant capability of the tumors. Besides, polydopamine as a photothermal conversion agent further enhanced the photothermal performance of SFO. The results revealed the PLLA/P-SFO scaffold possessed a photothermal conversion efficiency of 43.52% for PTT and a high ROS generation capacity of highly toxic ·O 2 − and ·OH for PDT. Consequently, the scaffold displayed a prominent phototherapeutic effect with antitumor rate of 96.3%. In addition, the PLLA/P-SFO scaffolds possessed good biocompatibility for cell growth. These advantages endow PLLA/P-SFO scaffold with extensive applications in biomedical fields and opened up new avenue towards nanozyme-mediated synergistic phototherapy.
研究领域:
生物医学工程
·
癌症治疗
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Jian Yang,Junfeng Li,Ziyu Yang,Jiarun Liu,Yong Xiang,Fang Wu
Silicon materials as promising anodes for lithium-ion batteries own a high specific capacity and a low discharge potential, while their application is restricted by their huge volumetric expansion and poor conductivity. In this study, a self-healing GaInSn–MS/Si hybrid electrode using an additive of microencapsulated gallium- liquid metal (GaInSn) with high electrical conductivity and mobility (LM microcapsule) was fabricated via an aqueous casting process. With the added LM microcapsule in the GaInSn–MS/Si hybrid electrode, the dispersed GaInSn could not only avoid its oxidation into a solid-state gallium oxide with decreased conductivity but also make it easy for uniform dispersion and quick fluidity. Consequently, the constructed self-healing GaInSn–MS/Si anode does not require manual splicing when the anode forms cracks, realizing a spontaneous self-healing performance, and the GaInSn–MS/Si hybrid electrode displays superior cycle stability and structural integrity, which retains a capacity of 806.7 mAh g–1 after 100 cycles at 2.1 A g–1. The constructed self-healing Si electrode structure design via LM microcapsule additives would provide a simple synthesis strategy for manufacturing advanced Si electrodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2019
·Vol. 66
·期 8
·3371-3375
·
IF 2.704
Zhaogui Wang,Qian Wu,Minmin Li,Jin Wu,Lijuan Liang,Gongtan Li,Shan Li,Yafang Wang,Chuan Liu
We have studied indium-free, solution-processed thin-film transistors (TFTs) based on tin-based oxide (SnOx) semiconductors with various dopants. The dopants include aluminum (Al), zirconium (Zr), and yttrium (Y) for their electron-suppressing properties and elemental abundance. A series of doping ratio has been studied and the doped devices exhibit improved switching characteristics as compared with pure SnOx-based TFTs. A SnOx-based TFT having a Zr-to-Sn ratio of 6.67% shows high performance with saturation mobility of 3.1 cm2/Vs, a turn on voltage of -5.4 V, and an ON- OFF current ratio of 4.9 × 106. X-ray photoelectronic spectroscopy studies were used to confirm that Zr can suppress oxygen vacancies effectively and significantly reduce carrier concentration. Furthermore, low-voltage SnZrO TFTs based on a solution-processed ZrO2 dielectric layer were fabricated and performed at high saturation mobility of 10.9 cm2/Vs. This research may provide new valuable insights for improving SnOx-based TFT performance.
研究领域:
材料科学
·
半导体器件
·
薄膜电子学
·
无机非金属材料
·
电子材料
✓ 已验证
DOI
高影响因子
Science Advances
·
2022
·Vol. 8
·期 10
·
IF 14.957
Huan Yu,Yinxiang Zeng,Nian Wu Li,Deyan Luan,Le Yu,Xiong Wen (David) Lou
We developed a three-dimensional hybrid fiber host consisting of interconnected N-doped hollow carbon spheres embedded with Sn nanoparticles (denoted as Sn@NHCF) for Zn metal anodes in high-performance Zn metal batteries. Experimental observations and density functional theory calculation reveal that the zincophilic Sn nanoparticles and N-doped carbons enable the homogeneous Zn deposition on the interior and exterior surfaces of the hollow fibers. Moreover, the hierarchical hollow fiber network effectively reduces the structural stress during the plating/stripping process. As a result, the developed Sn@NHCF host exhibits remarkable electrochemical properties in terms of high Coulombic efficiency, low voltage hysteresis, and prolonged cycling stability without dendrite formation. Moreover, a full cell based on the designed Sn@NHCF-Zn composite anode and a V2O5 cathode demonstrates superior rate capability and stable cycle life. This work provides a new strategy for the design of dendrite-free Zn anodes for practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
TaoTao Fan,Chenling Huang,Rong Chen,Jianping Xu,Chunyan Wang,Yong Qian
In this study, we proposed an effective and rational method for in situ decoration of tin dioxide (SnO 2 ) nanoparticles on single-walled carbon nanohorns (SWNHs) by using poly (sodium 4-styrenesulfonate) (PSS) as dispersing agent and stabilizer. The morphology and nanostructure of SnO 2 /SWNH composites were tested by TEM, XRD and XPS in detail. The results indicated that uniform dispersion of SnO 2 nanoparticles with mean size about 5nm on the SWNHs. The nanocomposites as electrode materials for high-performance supercapacitors were tested by cyclicvoltammetry (CV) and galvanostatic charge-discharge (GCD). Experimental results exhibited a high specific capacitance of 180.69 F/g at 1 A/g in 1 M Na 2 SO 4 electrolyte. The SnO 2 /SWNH composites showed good cycling stability, which the retention rate of the specific capacitance was 80.72% after 1200 times of charge and discharge cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Cell Reports Physical Science
·
2020
·
IF 0
Nating Yang,Yonghui Zhao,Hao Zhang,Weikai Xiang,Yuhan Sun,Shuai Yang,Yu Sun,Gaofeng Zeng,Kenichi Kato,Xiaopeng Li,Miho Yamauchi,Zheng Jiang,Tong Li
Sintering-induced aggregation of active metals is a major cause of catalyst deactivation. Catalysts that can operate above 800°C are rare. Here, we report an unusual noble metal catalyst with sintering-induced activation at temperatures up to 1,000°C. The catalyst consists of atomically dispersed palladium embedded in a reducible SnO 2 support designated for lean methane combustion. High temperature reaction simultaneously causes favorable changes of palladium ensemble state combining synergistically with lattice oxygen activation. Such changes lead to at least one order of magnitude improvement of the intrinsic reactivity, which compensates the surface area loss. Extensive characterizations such as atom probe tomography, X-ray absorption spectroscopy, and isotope tracking together with theoretical calculations illustrate the structure and surface chemistry changes and their impacts on the reaction mechanism. The catalyst also shows notable long-term stability and facile regeneration after poisoning. Our work may provide new insights into designing active and thermally stable catalysts.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
ACS Omega
·
2021
·
IF 3.512
Xianyu Liu,Tayyaba Najam,Ghulam Yasin,Mohan Kumar,Miao Wang
Tin chalcogenides are considered as promising anode materials for lithium-ion batteries (LIBs) due to their high theoretical lithium-storage capacity. Herein, we have successfully synthesized the composites of tin chalcogenides and graphite, that is, SnS/C, SnSe/C, and SnS0.5Se0.5/C, via a simple one-pot solid-state method. During the electrochemical test, they exhibit excellent lithium-storage ability and cyclic performance as the anode electrodes of LIBs due to the introduction of carbon. In particular, (i) SnS/C displayed a high specific capacity of 875 mAh g–1 at 0.2 A g–1 over 200 cycles; (ii) SnSe/C presents 734 mAh g–1 at 0.2 A g–1 after 100 cycles, and it delivers 690 mAh g–1 at 1.0 A g–1 over 300 cycles; and (iii) the SnS0.5Se0.5/C composite electrode delivers a specific capacity of 643 mAh g–1 at 0.5 A g–1 over 150 cycles. Furthermore, another series of tin-based composites have also been successfully fabricated (i.e., Sn/C, SnS2/C, SnSe2/C, and SnTe/C), showing the general applicability of the synthetic route applied here. Our synthetic approach demonstrates a promising route for the large-scale production of high-performance tin chalcogenides/C anode materials for LIBs and other battery systems (e.g., Na-ion and K-ion batteries).
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Research
·
2019
·
IF 0
Qiyao Guo,Jihuai Wu,Yuqian Yang,Xuping Liu,Zhang Lan,Jianming Lin,Miaoliang Huang,Yuelin Wei,Jia Dong,Jinbiao Jia,Yunfang Huang
Tin oxide (SnO2), as electron transport material to substitute titanium oxide (TiO2) in perovskite solar cells (PSCs), has aroused wide interests. However, the performance of the PSCs based on SnO2 is still hard to compete with the TiO2-based devices. Herein, a novel strategy is designed to enhance the photovoltaic performance and long-term stability of PSCs by integrating rare-earth ions Ln3+ (Sc3+, Y3+, La3+) with SnO2 nanospheres as mesoporous scaffold. The doping of Ln promotes the formation of dense and large-sized perovskite crystals, which facilitate interfacial contact of electron transport layer/perovskite layer and improve charge transport dynamics. Ln dopant optimizes the energy level of perovskite layer, reduces the charge transport resistance, and mitigates the trap state density. As a result, the optimized mesoporous PSC achieves a champion power conversion efficiency (PCE) of 20.63% without hysteresis, while the undoped PSC obtains an efficiency of 19.01%. The investigation demonstrates that the rare-earth doping is low-cost and effective method to improve the photovoltaic performance of SnO2-based PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
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
Energy Technology
·
2022
·Vol. 10
·期 4
·2101024
·
IF 4.149
Zihao Xu,Jinrui Ye,Youya Pan,Kai Liu,Xiaofang Liu,Jianglan Shui
Sodium-ion battery (SIB) is regarded as the next generation of large-scale energy storage systems, but it still faces problems such as low energy density, severe expansion/contraction of electrode volume, and poor cycle performance. Herein, necklace-like Sn-MOF@PAN fibers are prepared by the electrospinning method and then carbonized into Sn-C necklace paper as the binder-free cathode in an SIB. In each bead, Sn nanoparticles are wrapped by a porous carbon shell. The morphology and composition of the necklace-shaped Sn@C nanofibers are optimized by adjusting the ratio of Sn-MOF/PAN in the precursor. Sn@C with the optimal composition has a high specific capacity of 207 mAh g −1 even at a high current density of 2 A g −1 and maintains a specific capacity of 327 mAh g −1 after 100 cycles at a current density of 100 mA g −1 . This research provides a high-performance flexible electrode for SIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）