Materials
·
2023
·Vol. 16
·期 11
·4027
·
IF 3.4
Jisheng Xu,Haixia Wu,Xinye Lu,Yaqian Huang,Jianni Chen,Wendi Zhou,Zewen Lin,Jie Song,Hongliang Li,Rui Huang
We report a rapid synthesis method for producing CsSnCl3:Mn2+perovskites, derived from SnF2, and investigate the effects of rapid thermal treatment on their photoluminescence properties. Our study shows that the initial CsSnCl3:Mn2+samples exhibit a double luminescence peak structure with PL peaks at approximately 450 nm and 640 nm, respectively. These peaks originate from defect-related luminescent centers and the 4T1→6A1transition of Mn2+. However, as a result of rapid thermal treatment, the blue emission is significantly reduced and the red emission intensity is increased nearly twofold compared to the pristine sample. Furthermore, the Mn2+-doped samples demonstrate excellent thermal stability after the rapid thermal treatment. We suggest that this improvement in photoluminescence results from enhanced excited-state density, energy transfer between defects and the Mn2+state, as well as the reduction of nonradiative recombination centers. Our findings provide valuable insights into the luminescence dynamics of Mn2+-doped CsSnCl3and open up new possibilities for controlling and optimizing the emission of rare-earth-doped CsSnCl3.
研究领域:
材料科学
·
光电
·
固体化学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Fengxuan Chen,Xin Hu,Longhao Jisi,Liping Su,Huiyao Zhao,Yanbei Wei,Rui Zhou,Yangdi Chen,Jun Qu,Yonglian Xiong,Mao Liang,Wenfeng Zhang
Metal halide perovskite solar cells have received a lot of attention from researchers because of their excellent performance, and their efficiency has increased rapidly over the past decade and is now comparable to that of conventional crystalline silicon solar cells. Perovskite solar cells (PSCs) are currently most commonly constructed with SnO 2 as an electron transport layer (ETL). Nevertheless, its existence of bulk phase defects and surface defects pose an impediment to developing a higher level as the most favorable electron transport layer. This paper suggests an efficient technique to decrease the defects of SnO 2 through incorporating a metal halide SnF 2 in planar (n-i-p type) perovskite solar cells. Divalent Sn in SnF 2 is easily oxidized to tetravalent Sn, leading to more conversion of divalent Sn to tetravalent Sn, which inhibits the formation of oxygen vacancies from the source. F replaces defective sites, passivates oxygen vacancy defects, and reduces the content of hydroxyl oxygen on the surface. Doping SnF 2 enhances the conduction band value and conductivity of SnO 2 , making the energy levels of the ETL and perovskite interfaces more compatible. This eliminates energy barriers in charge transport. Consequently, the fill factor of planar PSCs that were prepared through SnO 2 :SnF 2 ETL exhibited an increase from 80.01% to 82.12%. Furthermore, the efficiency of PCE underwent an improvement from 21.43% to 22.65%.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Jinbo Zhang,Yanxia Su,Zeran Ding,Yuqian Qiu,Chong Li,Yue Ma,Ningyu Zhang,Fei Xu,Hongqiang Wang
The unstable Na/electrolyte interface, plagued by Na dendrites and interface degradation, critically hinders solid-state Na batteries. We propose the design of thin poly(ethylene oxide) (PEO)-based composite polymer electrolytes with a stabilized solid electrolyte interphase (SEI). Incorporating SnF 2 into PEO and infusing the composite into an ultrathin polyethylene (PE) scaffold (PEO-xSnF 2 @PE) promotes a stable Na 15 Sn 4 /NaF-rich SEI that facilitates uniform Na⁺ deposition, while the PE layer ensures a thin yet mechanically robust structure. Consequently, the optimized composite polymer electrolyte, featuring an ultrathin 20 µm thickness, low areal density of 1.9 mg cm −2 , and ultrahigh tensile strength of 35 MPa, demonstrates exceptional dendrite-suppressing capability. Such synergistic effects enable Na symmetric cells employing PEO-4SnF 2 @PE to achieve ultralong cycling exceeding 10800 h (>1 year), alongside a critical current density of 1.0 mA cm −2 . Full cells paired with a Na 3 V 2 (PO 4 ) 3 cathode exhibit exceptional cycling stability, achieving 97.6% capacity retention over 500 cycles. This work demonstrates that combining SnF 2 functional additives with a flexible, high-strength supporting layer effectively mitigates interfacial instability and dendrite propagation in solid polymer electrolytes, offering new design principles for long-life solid-state sodium metal batteries.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态电池
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
Mineral Processing and Extractive Metallurgy Review
·
2017
·
IF 1.219
Zijian Su,Yuanbo Zhang,Bingbing Liu,Yingming Chen,Guanghui Li,Tao Jiang
A selective reduction volatilization (SRV) process developed by the authors was effective to remove tin from the complex tin-bearing iron concentrates. It is reported that many gangue minerals of quartz, calcite, and fluorite are existent in the concentrates. Our previous studies investigated the effect of quartz and calcite on the removal of tin. In this study, the effect of fluorite (calcium fluoride) was conducted, and pure CaF2 was added into the tin-bearing iron concentrates to investigate how CaF2 affected the tin volatilization behavior under different roasting conditions. The effect of CaF2 on the phase transformation of SnO2 was also determined using SEM-EDS and XRD. The results indicated that SnF2 was much easier to volatilize than SnO under CO-CO2 atmosphere in the presence of CaF2, so the calcium fluoride in the concentrates was beneficial to promote the tin removal during the SRV process.
研究领域:
冶金学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Material Advances
·
2026
·
IF 17.4
Chaochao Wei,Tianyu Lei,Yuanhang Wang,Yang Shao,Xi Chen,Jia Xie,Liangliang Li
All-solid-state fluoride-ion batteries (ASSFIBs) offer compelling advantages in energydensity and safety, but their practical application is hindered by poor interfacial stability andsluggish fluoride-ion kinetics, particularly at the anode. Herein, we report an interfaceengineering strategy, specifically incorporating SnF2 into a Sn-based composite anode, thatsignificantly enhances the performance and durability of ASSFIBs with a β-PbSnF4 solidelectrolyte and a BiF3 cathode. The introduction of SnF2 pre-constructs internal Sn/SnF2interfaces, which facilitate ion diffusion, mitigate volume changes, and promote morereversible fluorination/defluorination reactions. As a result, the SnSnF2 composite anodeendows ASSFIBs with higher capacity, improved rate performance, and superior cyclingstability compared to a pristine Sn composite anode. The ASSFIB with a SnSnF2composite anode operates stably for 60 cycles at room temperature with a capacity retentionof nearly 100%. Furthermore, the temperature-dependent performance of ASSFIBs with aSnSnF2 anode (–20 °C to 60 °C) is investigated. Combined analyses using distribution ofrelaxation times, stack pressure measurements, and morphological characterization revealthat while elevated temperatures boost initial capacity via enhanced kinetics, they alsotrigger interfacial porosity and mechanical degradation, leading to accelerated capacityfading. In contrast, operation at low temperatures preserves solid–solid contact andinterfacial integrity, enabling stable cycling. This work demonstrates a highly effectiveinterface engineering approach to enhance the electrochemical performance of ASSFIBsand provides deep insight into their thermomechanical failure mechanisms.
✓ 已验证
DOI
高影响因子
PROGRESS IN PHOTOVOLTAICS
·
2024
·
IF 8
Debesh Devadutta Mishra,Pranati Kumari Rath,Natarajan Thirugnanam,Tao Shen,Zihe Chen,Zexian Zhang,Xinghang Liu,Jinhua Li,Xianbao Wang,Cher Ming Tan
The suitable band gap with outstanding optoelectronic characteristics makes Sn-based perovskites one of the promising candidates for the preparation of efficient lead-free perovskite solar cells (PSCs). However, preparing Sn 2+ -based PSCs is very difficult due to the ready oxidation of Sn 2+ to Sn 4+ when exposed to air. In this work, by incorporating the trimethylamine borane complex (TMAB) as an antioxidant additive into the perovskite precursor solution along with excess SnF 2 , we report the fabrication of air-stable FASnI 3 -based solar cells. The complex formed by TMAB-SNF 2 (additive layer) enables in-situ encapsulation of perovskite grains. This layer considerably improves the oxidation stability of the perovskite layer by eliminating oxygen vacancies from the NiO hole transport. The resulting PSCs can maintain more than 70% of the efficiency over 45 and 75 hours respectively in air and N 2 exposure without encapsulation. This can be regarded as a genuinely enhanced attribute, particularly considering the use of carbon in one of the electrodes in FASnI 3 perovskites. The findings suggest an alternative approach to provide effective and sustainable Sn-based PSCs in the future.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 9
·4921-4927
·
IF 2.936
Yajie Wang,Yue Yu,Ya Zou,Liyan Zhang,Lili Hu,Danping Chen
The structure of tin fluorophosphate glasses and their low melting point properties have attracted a great deal of attention recently, but their own luminescent features have not been well studied. Photoluminescence properties of ultra-low glass transition temperature (<200 °C) tin fluorophosphate glasses with varying SnO/SnF2 molar ratios at room temperature have been investigated in the present study. Broad photoluminescence in the range from 400 nm to 700 nm, originating from the S1–S0 and T1–S0 transitions of Sn2+ with the ultra-high concentration (70 mol%), was obtained. And the SnF2–SnO–P2O5 glasses exhibited a fast decay lifetime of 2 ns. Both wavelengths of the excitation peak and emission peak depend on the local structure of Sn2+, which is influenced by different SnO/SnF2 molar ratios. White light can be generated by appropriately altering the SnO/SnF2 molar ratios in the SnF2–SnO–P2O5 glasses. The ultra-low glass transition temperature SnF2–SnO–P2O5 glasses without rare earth elements are a possible candidate for future high white light emission.
研究领域:
材料科学
·
光学
·
光子学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·Vol. 54
·期 7
·5189-5195
·
IF 2.5
Wang Cong,Li Yue,Li Yahao,Zheng Xiaoxi,Yang Xuelin
Lithium metal is recognized as a promising alternative anode material for next-generation Li batteries. However, the growth of lithium dendrites due to uneven deposition of lithium and the side reactions caused by unstable solid–electrolyte interphase (SEI) films have seriously hindered the development of lithium metal batteries. Therefore, we cast a bifunctional dual-layer protective film of graphene oxide (GO) and SnF 2 onto a Li plate to address the above problems. As a result of the synergistic effect between the SnF 2 -derived LiSn alloy and GO layer, the symmetric cell with modified Li electrodes exhibited extraordinary cyclic stability close to 2900 h when cycled at 0.5 mA cm −2 and 0.5 m Ah cm −2 . Ultralow interfacial impedance of only 3.6 Ω was also obtained at the 50th cycle. This work presents a simple but effective modification strategy to improve the stability of lithium metal battery anodes.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-18
·
IF 15.7
Li Taiguang,Chen Butian,Wang Tenghui,Liu Chong,Yin Wen,Mao Qianjiang,Zhou Dongxu,Hao Yongmei,Liu Xiangfeng
Solid-state sodium metal batteries have attracted great interest because of their improved safety and abundant Na resources. However, the interfacial resistances and instabilities induced by parasitic reactions, together with Na dendrite issues, result in reduced rate capability and poor cycling stability. Here, we address these challenges by intrinsically inhibiting parasitic interfacial redox reactions through enhanced P-O covalency in Na 3 Zr 2 Si 2 PO 12 (NZSP) with Na 2 SiF 6 incorporation, wherein the high electronegativity of F strengthens P-O covalency. Additionally, SnF 2 coating provides a sodiophilic surface and stabilizes the NZSP interface, which is essential for effective electrochemical cycling. This integrated approach significantly reduces interfacial impedance to 2.0 Ω cm 2 , enabling stable Na plating/stripping for 3600 hours at 0.5 mA cm -2 /0.25 mAh cm -2 . The full cell with Na 3 V 2 (PO 4 ) 3 positive electrode demonstrates stable cycling with high-rate capability (87.5% capacity retention after 2500 cycles at 1 C and 96.1% capacity retention after 1200 cycles at 5 C). This study sheds light on the development of high-performance quasi-solid-state sodium batteries.
研究领域:
储能技术
·
材料科学
·
电化学
·
固态电池
·
界面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）