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
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Wenming Zhang,Pin Cao,Ling Li,Kun Yang,Kun Wang,Shuo Liu,Ze Yu
The combination of high-capacity and long cycle stability has always been regarded as a prerequisite for efficient anode materials in sodium-ion batteries (SIBs). In this work, we design and synthesize carbon-encapsulated 1D SnO 2 /NiO heterojunction hollow nanotubes (SnO 2 /NiO@C) and successfully apply them as an anode material for SIBs . SnO 2 /NiO@C is synthesized by a facile electrospinning technique and subsequent chemical bath deposition, followed by polydopamine (PDA) carbonization. The 1D hollow structure can effectively reduce the diffusion length of sodium ions and the large volume variation of SnO 2 during cycling. In addition, carbonized PDA is uniformly dispersed on the SnO 2 /NiO hollow nanotubes, not only contributing to structural stability, but also acting as a conductive matrix to enhance the battery performance. SIBs based on SnO 2 /NiO@C anodes exhibit a highly reversible capacity of 320 mAh g −1 after 200 cycles at 100 mA g −1 and a considerably stable long cycling performance. The present work highlights the potential of SnO 2 /NiO@C based anode materials for the development of high-performance SIBs with combined high capacity and long cycle stability.
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 14
·2100368
·
IF 6.147
Yuanyuan Li,Jianwei Li,Jun Cheng,Xiaoyan Xu,Lina Chen,Lijie Ci
Sulfide solid electrolytes are excessively investigated on account of the high ionic conductivity. However, their applications are hindered by the air-sensitivity and poor interfacial compatibility against lithium metal. Herein, Sn and O co-doping strategy is designed to enhance the stability of the sulfide-based solid state electrolyte towards air moisture and lithium metal. The ionic conductivity of Li 7 Sn 0.1 P 2.8 S 10.5 O 0.2 is twice of that of the pristine Li 7 P 3 S 11 due to the synergistic effect of Sn and O prepared by the solvent-assisted ball milling method. Impressively, with partial substitution of S by O and P by Sn in Li 7 P 3 S 11 , the newly-designed electrolyte largely suppresses the hydrolysis in the air. Furthermore, galvanostatic cycling of symmetric cells demonstrate that Li 7 Sn 0.1 P 2.8 S 10.5 O 0.2 enables improved interfacial compatibility towards lithium metal. Hence, the all-solid-state batteries with Li 7 Sn 0.5 x P 3− x S 11−2.5 x O x significantly elevate the cyclability and the reversible capacity. The co-doping strategy provides a promising approach to achieve excellent chemical and electrochemical stability for the large-scale application of sulfide-based solid state electrolytes.
研究领域:
材料科学
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电化学
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储能
·
固体离子学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2019
·
IF 3.42
Minjia Wang,Yang Xu,Yuan Liu,Wentao Wu,Shuaihua Xu
ATO hollow microspheres were synthesized with carbon ball template by the hydrothermal method . In order to study the likely formation mechanism of ATO hollow microspheres, the morphology, crystalline structure and microstructure were examined with XRD, SEM, EDS and HRTEM. The optical and thermal characteristics of the microspheres including absorption and reflectance, and thermal conductivity , infrared emissivity (8˜14 μm), and specific heat capacity were also measured. Silicone acrylic emulsion coating containing different dosages of ATO microspheres were then prepared, and their Vis-NIR transmittance and photo-thermal shielding performance were studied. Compared to solid microspheres, ATO hollow microspheres showed higher absorption, lower reflectance, lower thermal conductivity , higher specific heat capacity and higher infrared emissivity. Results also showed that ATO hollow microspheres introduction reduced the Vis-NIR transmittance of the silicone acrylic emulsion coating, and also enhanced the photo-thermal shielding performance of coating by higher absorption, slower thermal conduction and radiative cooling. This study indicates that coating containing ATO hollow microspheres is a promising material that can be applied for energy conservation.
研究领域:
材料科学
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纳米技术
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热功能涂层
·
节能材料
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光学材料
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2020
·Vol. 32
·期 43
·2003990
·
IF 27.398
Shuai You,Haipeng Zeng,Zhiliang Ku,Xiaoze Wang,Zhen Wang,Yaoguang Rong,Yang Zhao,Xin Zheng,Long Luo,Lin Li,Shujing Zhang,Min Li,Xingyu Gao,Xiong Li
Perovskite solar cells (PSCs) have rapidly developed and achieved power conversion efficiencies of over 20% with diverse technical routes. Particularly, planar-structured PSCs can be fabricated with low-temperature (≤150 °C) solution-based processes, which is energy efficient and compatible with flexible substrates. Here, the efficiency and stability of planar PSCs are enhanced by improving the interface contact between the SnO 2 electron-transport layer (ETL) and the perovskite layer. A biological polymer (heparin potassium, HP) is introduced to regulate the arrangement of SnO 2 nanocrystals, and induce vertically aligned crystal growth of perovskites on top. Correspondingly, SnO 2 –HP-based devices can demonstrate an average efficiency of 23.03% on rigid substrates with enhanced open-circuit voltage ( V OC ) of 1.162 V and high reproducibility. Attributed to the strengthened interface binding, the devices obtain high operational stability, retaining 97% of their initial performance (power conversion efficiency, PCE > 22%) after 1000 h operation at their maximum power point under 1 sun illumination. Besides, the HP-modified SnO 2 ETL exhibits promising potential for application in flexible and large-area devices.
研究领域:
材料科学
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能源技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 13
·2769-2779
·
IF 8.928
Yuning Zhang,Hai Xu,Dongfang Niu,Xinsheng Zhang,Yayun Zhang
Graphical Composite catalyst : Axially grafted pyridine is successfully coupled with SnO 2 nanoparticles to construct the organic-inorganic composite catalyst SnO 2 /Py-CNTO for highly efficient electroreduction of CO 2 . SnO 2 /Py-CNTO delivers an excellent faradaic efficiency (FE) of 96 % for CO 2 ER at −1.29 V RHE where the HCOOH production with 85 % FE dominates, and good stability for 32 h electrolysis. Sn-based electrocatalysts have shown great potential in the future industrial application of CO 2 electroreduction (CO 2 ER) to C 1 products due to their non-toxicity and low price. However, it is a great challenge to fabricate a Sn-based electrocatalytic system with high performance and stability. Herein, grafted pyridine was innovatively coupled with SnO 2 to construct an organic-inorganic composite (SnO 2 /Py-CNTO) for highly efficient CO 2 ER. The detailed studies showed that pyridine and protonated pyridine coexist on the surface of SnO 2 /Py-CNTO, and both play distinctive roles in promoting the selectivity of CO 2 ER. Benefiting from the merits, SnO 2 /Py-CNTO delivered an excellent faradaic efficiency (FE) of 96 % for CO 2 ER at −1.29 V RHE where the HCOOH production with 85 % FE dominated, and good stability for 32 h electrolysis. The theoretical calculations showed that protonated pyridine not only facilitates the CO 2 adsorption and HCOOH desorption, but also significantly reduces the limiting potential for the conversion of CO 2 to HCOOH.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2020
·Vol. 26
·期 42
·9365-9370
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IF 4.857
Dongpo Xu,Kangjie Ge,Yan Chen,Shuyan Qi,Jingxuan Qiu,Qing Liu
Graphical A new sensor : Cable-like core–shell mesoporous SnO 2 nanofibers have been successfully prepared by single-nozzle electrospinning by using polystyrene (PS) and poly(vinylpyrrolidone) (PVP) as templates. The SnO 2 nanofibers show potential as a good sensing material toward gaseous HCHO, being able to detect low concentrations of HCHO. The cable-like core–shell mesoporous SnO 2 nanofibers also exhibited excellent cycling stability and selectivity. In this study, we have developed a simple and efficient single-nozzle electrospinning strategy involving the phase separation of polystyrene and poly(vinylpyrrolidone) to construct cable-like core–shell mesoporous SnO 2 nanofibers. Compared with traditional multi-axial electrospinning approaches to the synthesis of core–shell nanofibers, the single-nozzle electrospinning process requires no complex multi-axial electrospinning setups or post-treatments, just drying and annealing after electrospinning. The obtained SnO 2 nanofibers show promise as a sensing material for formaldehyde at low concentrations, the detection limit being about 1 ppm. Furthermore, the nanofibers exhibited good cycling stability and selectivity, with response and recovery times toward 10 ppm formaldehyde being approximately 18 and 196 s, respectively, at an operating temperature of 195 °C.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AIP Advances
·
2018
·Vol. 8
·期 12
·
IF 1.653
Lian Yadong,Huang Xiaokun,Yu Ji,Tang Tong B.,Zhang Weiyi,Gu Min
Scrutinyite SnO 2 was synthesized by annealing SnO nanoparticles fabricated from micron-size SnO via ball milling. The isotropic as well as anisotropic chemical shifts of 119 Sn obtained by solid-state nuclear magnetic resonance method, were verified computationally using a pseudopotential method in density-functional theory. The results fit with 6-fold coordinated Sn. A linear relationship holds empirically between isotropic shift and coordination number divided by Sn-O average bond length in all polymorphs of tin oxides. When the annealing proceeded in an oxygen-free atmosphere, metallic tin, the rutile phase of SnO 2 and oxygen vacancies associated with permanent electric dipoles were also detected by thermal analysis and dielectric spectroscopy.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Ying Wang,Zhenting Zhao,Yongjiao Sun,Pengwei Li,Jianlong Ji,Yong Chen,Wendong Zhang,Jie Hu
Pristine tin dioxide (SnO 2 ) and Au-loaded SnO 2 composite nanoparticles were synthesized by a simple hydrothermal method. The phase structure, composition, and morphology of synthesized Au-loaded SnO 2 composite nanoparticles were comprehensively investigated. Furthermore, the gas sensing performance of the as-prepared pristine and Au-loaded SnO 2 gas sensors toward low concentration of hydrogen (H 2 ) were systematically evaluated. The results indicated that compared to the pristine SnO 2 gas sensor, the Au-loaded SnO 2 composite nanoparticles could not only significantly improve the gas sensing response, but also decrease the optimum working temperature. Moreover, the experimental results showed that the 4.0 at.% Au-loaded SnO 2 gas sensor exhibited the highest response (25) to 100 ppm H 2 at 250 °C, which was about five times higher than that of the pristine one. In addition, it also provided a rapid response/recovery time (1 s/3 s) and a low detection limit (1 ppb). Therefore, Au-loaded SnO 2 composite nanoparticles are more suited for hydrogen detection compared to pristine SnO 2 gas sensor.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Materials Research
·
2018
·Vol. 109
·期 8
·743-750
·
IF 0.748
Manna Liu,Shishuai Sun,Liying Yang,Shougen Yin
Composites of ultrathin SnO 2 nanorods, ∼20 nm in diameter and ∼100 nm in length, intercalated with reduced graphene oxide nanosheets were synthesized by a simple one-step hydrothermal process. The electrochemical performance of the composites as electrode materials for supercapacitors was studied in 1 M Na 2 SO 4 electrolyte. The experimental results indicated that a maximum specific capacitance of 184.6 F g −1 could be obtained from composites at a current density of 100 mA g −1 , which was much higher than that of pure SnO 2 (62.4 F g −1 ). Furthermore, the composite exhibited excellent cycling stability (the specific capacitance still retained 98% after 6000 cycles when the scan rate was 50 mV s −1 ). The excellent electrochemical performance of the composites was attributed to the synergistic effect of SnO 2 nanorods and reduced graphene oxide, which makes up for the shortcomings of the individual components. These results indicated that the prepared composites are excellent candidates as electrode materials for high performance energy storage devices.
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 NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 8
·1-13
·
IF 2.009
Shu Miao,Li Xing
The specific capacity (781 mAh g −1 ) of SnO 2 as anode materials for lithium-ion batteries (LIBs) is much higher than that of commercial graphite materials (372 mAh g −1 ), which attracts great attention from researchers. In this paper, a series of Mn x Co 0.5− x Sn 0.5 O 2 ( x = 0.00, 0.15, 0.25, 0.35, 0.50) and SnO 2 porous nanofibers and nanoparticles are prepared through a single-spinneret electrospinning technique followed by a calcination process. The electrochemical properties of porous nanofibers and nanoparticles have been measured and discussed, and the results show that porous nanofibers have better performance when doped with manganese and cobalt components. With the increase of manganese contents, the electrochemical capability of the batteries is improved. As a demonstration, the Mn 0.50 Co 0.00 Sn 0.5 O 2 ( x = 0.50) porous nanofibers present the first discharge capacity of 1347.3 mAh g −1 , and after 100 cycles, Mn 0.50 Co 0.00 Sn 0.5 O 2 possesses the higher discharge capacity of 131.6 mAh g −1 when compared with the other materials.
Mn x Co 0.5− x Sn 0.5 O 2 ( x = 0.5) porous nanofibers were prepared through an electrospinning technique with a calcination process, which present the first discharge capacity of 1347.3 mAh g −1 at a current density of 100 mAh g −1 .
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2015
·
IF 2.947
Chuande Huang,Xiaodong Wang,Xin Liu,Ming Tian,Tao Zhang
In this paper, the phase evolution, microstructure changes, and element diffusion for the formation of BaSnO 3 from BaCO 3 and SnO 2 were extensively investigated. It was found that BaCO 3 rapidly diffused on surface of SnO 2 at the initial stage of the reaction (approximately 700 °C), forming a uniform BaSnO 3 shell. Subsequently, BaSnO 3 grew via two different routes depending on the calcination temperature. When the reaction was carried out below 820 °C, BaSnO 3 phase further grew by diffusion of barium ions across BaSnO 3 layer to SnO 2 phase, since the BaSnO 3 interlayer prevented the direct reaction between surface BaCO 3 and SnO 2 core. Once a higher temperature above 820 °C was provided, Ba 2 SnO 4 were generated by reaction between BaCO 3 and BaSnO 3 shell. Under such circumstances, pure BaSnO 3 was obtained by diffusion of barium ions from Ba 2 SnO 4 across BaSnO 3 to SnO 2 . The rate-determining step in both cases was assigned to the diffusion of barium ions.
研究领域:
材料科学
·
化学工程
✓ 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）