JOM
·
2020
·Vol. 72
·期 8
·3003-3010
·
IF 2.054
Zou Jingyi,Sun Xiaogang,Li Rui,He Qiang
The electrochemical performance of fluorinated multiwalled carbon nanotubes (F-MWCNTs) as a new type of conductive agent for Li–SnO 2 batteries has been studied. Multiwalled carbon nanotubes (MWCNTs) were fluorinated to obtain F-MWCNTs with core–shell structure (fluorocarbon atomic ratio C/F = 1:1). The unique tubular structure of the F-MWCNTs allows more Li + ions and electrons to enter the channel around the active material CF 1 , which increases the electrochemical reaction effect and reduces the polarization effect of the batteries, thereby improving the utilization of the active material, and the capacity as well as the stability of the discharge plateau of the resulting batteries. The F-MWCNTs are an excellent alternative to the traditional conductive graphite. The SnO 2 @F-MWCNTs battery showed high specific capacity (1588.71 mAh g −1 at 100 mA g −1 ), excellent cycle performance (962.92 mAh g −1 after 100 cycles), excellent coulombic efficiency (99.89%), and low internal resistance in repeated electrochemical tests.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2021
·
IF 2.917
Shu-zhen YANG,Yan-fang HUANG,Xue-chun HAN,Gui-hong HAN
Humic acid (HA) was studied as a modifier in the SnO 2 anode preparation for the electrochemical performance improvement. Scanning electron microscopy, 180° peel test, and nanoindentation experiment were used to examine the influence of the HA on electrode. The results showed that the addition of HA could improve the dispersion uniformity of all particles. The components were tightened, increasing the difficulty of peeling off the film from the current collector. The deformation resistance of the electrode was greatly enhanced by the HA modification. The electrochemical test results showed that the anode from the normal micron-sized SnO 2 particles with the HA modifier exhibited significant progress in electrochemical performance compared with those without HA. The reversible specific capacity of the SnO 2 anode can be maintained as high as 733.4 mA·h/g at a current density of 100 mA/g after 50 cycles. Therefore, HA is a promising modifier for anode preparation of lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
POLYMER SCIENCE SERIES B
·
2019
·Vol. 61
·期 3
·361-368
·
IF 0.907
Yanmin Wang,Liu Aiping,Li Tingxi
Abstract Composites comprised by polyaniline doped with itaconic acid and tin oxide (SnO 2 ) were prepared by in situ polymerization method. Aniline was polymerized in the presence of SnO 2 to form inorganic–organic nanocomposite materials, in which SnO 2 nanoparticles were embedded within polyaniline. The chemical structure, crystallinity, morphology, thermal stability, conductivity, and microwave absorbing properties were characterized. The morphology of the composites is nanorod and polyaniline enwraps SnO 2 to form a kind of core-shell nanostructure. Moreover, the composites have better thermal stability and microwave absorbing properties.
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
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2020
·Vol. 67
·期 8
·1431-1436
·
IF 1.554
Hsiang-Ning Luk,Tsai-Hsuan Dai,Ren-Jang Wu,Murthy Chavali
This proposed Pt@SnO 2 core-shell nanocomposite material based electrochemical sensor towards epinephrine detection showed high sensitivity, repeatability and high stability. It can play a significant role for precision determination of epinephrine in the drug sample and can also used for either simultaneous determination or others like acetaminophen (AC) and dopamine (DA) in samples.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Jin-Lin Yang,Da-Qian Cai,Xiao-Ge Hao,Ling Huang,Qiaowei Lin,Xiang-Tian Zeng,Shi-Xi Zhao,Wei Lv
The practical uses of lithium–sulfur batteries are greatly restricted by the sluggish reaction kinetics of lithium polysulfides (LiPSs), leading to low sulfur utilization and poor cyclic stability. Using the heterostructure catalysts is an effective way to solve the above problems, but how to further enhance the conversion efficiency and avoid the surface passivation by the insulative Li2S has not been well investigated. Herein, a heterostructure catalyst with rich heterointerfaces was prepared by modifying Mo2N microbelt with SnO2 nanodots. The formed rich interfaces with high accessibility act as the profitable nucleation sites guiding the Li2S 3D growth, which avoids the catalyst surface passivation and facilitates the LiPS conversion. The introduction of SnO2 nanodots also enhances the LiPS adsorption. Thus, the assembled battery with the above catalyst as the cathode additive shows a high capacity of 738.3 mAh g–1 after 550 cycles at 0.5 C with an ultralow capacity decay of 0.025% per cycle. Even with high sulfur loading of 9.0 mg cm–2, good cyclic stability is also achieved at 0.5 C with a low E/S ratio of 5 μL mgs–1. This work shows an effective way to enhance the LiPS conversion kinetics and guide Li2S deposition in Li–S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Energy & Environmental Science
·
2025
·
IF 30.8
Shengwen Zou,Jingjing Zhang,Yi Xin,Jinlong Jin,Guangxin Liu,Xiaojun Yan,Jianmei Huang
SnO2 is one of the best electron-transport materials for perovskite solar cells (PSCs). However, the limited interfacial contact and the reaction occurring at the buried interface between the perovskite and SnO2 reduce their performance. Herein, we revealed a strong deprotonation reaction of formamidinium cation that occurred at the buried interface during perovskite growth under a nitrogen atmosphere. In contrast, this reaction was considerably inhibited by moisture when the perovskite was grown under an ambient atmosphere (Amb-perovskite). Thus, defects at the buried interface of the Amb-perovskite were reduced, considerably suppressing the non-radiative recombination. Amb-PSC resulted in an efficiency of 25.69%, with an ultra-high fill factor of 86.21% and enhanced operational stability without decay after more than 1000 h under continuous 1-sun illumination. This work provides an efficient strategy for perovskite film annealing under an ambient atmosphere to minimise the buried interface loss. Its scaling-up potential and easy-processibility make it a promising strategy for low-cost large-scale manufacturing of PSCs.
研究领域:
材料科学
·
光伏技术
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhicai Yu,Lele Huang,Mi Zhou,Jie Xu,Jianchao Ma,Yuhang Wan,Qing Jiang,Xueru Qu,Hualing He
Early fire warning represents an effective mean in the face of fire that can remind people in timely manner to adopt effective countermeasures before the occurrence of fire. Despite the encouraging progress of current early fire-warning sensors, a more sensitive monitoring of early fires in multiple aspects remains challenge. Herein, a dual-mode core-sheath structured SnO 2 /MoS 2 @MXene@ANFs (SMA) early fire warning sensor fiber was prepared by coaxial wet spinning technology. The core-layer of SMA fiber comprised the thermoelectric material Ti 3 C 2 T X MXene, whereas the shell-layer comprised the gas-sensitive SnO 2 /MoS 2 and silver nanowires (Ag NWs) along with aramid nanofibers (ANFs). The robust and flame-retardant ANFs served as protective shell, safeguarding the stability and flexibility of the temperature and gas sensing functions within the fiber. Based on the thermoelectric performance of MXene, there is a linear relationship between the output voltage and temperature difference of SMA fiber, which can achieve wide range of temperature sensing from 50 to 300 ℃ and accurately identify abnormal temperature increases in the environment. Simultaneously, The bridging effect between one-dimensional Ag NWs and SnO 2 /MoS 2 enhances the sensing capability of fiber for CO (R 0 /R = 1.43@100 ppm). In addition, an early fire warning system based on SMA fiber has been established, which can sensitively detect the flames (≤4 s). This system can also be used for monitoring CO gas in fire environments, guiding firefighters’ rescue actions, expanding the application scope of early fire warning sensors in the past, and opening up new directions for the development of intelligent early fire sensors in the future.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2024
·
IF 10.8
Pengyu Dong,Yue Jiang,Zhengchi Yang,Licheng Liu,Gu Li,Xinyang Wen,Zhen Wang,Xinbo Shi,Guofu Zhou,Jun-Ming Liu,Jinwei Gao
Organic-inorganic metal halide perovskite solar cells (PSCs) are favorable candidates for next-generation solar cells, due to their excellent photovoltaic performance and promising low-cost fabrication process. Particularly, tin oxide (SnO 2 ), with excellent charge mobility and extraction efficiency, is widely used as electron transport layers (ETLs), and the efficiency of the corresponding n-i-p-type perovskites has been certified as high as 26.21% in single-junction devices. The SnO 2 layer serves as the substrate for the growth of perovskite films, determining the crystalline quality and the buried interface of perovskite films. However, due to the different thermal expansion coefficient of SnO 2 and perovskite, the subsequent perovskite annealing process leads to the residual stress at the buried interfaces and lattice distortion in the perovskite films, which seriously affects their optoelectronic performance and stability. To release this interfacial stress, researchers have made some progress by applying different polymers and small molecules to the SnO 2 /perovskite interface as a buffer layer. Among these, two-dimensional (2D) nanosheets with high carrier mobility, a wide bandgap range, and excellent optical absorption properties are promising, especially 2D NbSe 2 nanosheets showing the advantages of solution-processability, high intrinsic conductivity and clean smooth surface, namely without dangling bonded atoms. Herein, 2D NbSe 2 nanosheets have been introduced at the SnO 2 /perovskite interface to release the undesired residual tensile strain in perovskite films and to form a more matched interfacial energy level alignment. As a result, we have obtained a high-quality perovskite film and further an improved photovoltaic performance. The PCE has been increased from 21.81% to 24.05%. The unencapsulated cell maintained 91% of the initial efficiency after aging over 1000 h under atmospheric condition.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 2
·272-279
·
IF 0.64
Li Zhi,Shen Wenjian,Zhao Juan,Ying Hangkai,Wu Zhengli,Liu Yifan,Li Wangnan,Ku Zhiliang,Peng Yong,Huang Fuzhi,Cheng Yibing,Zhong Jie,Fu Zhengyi
A novel aqueous Sn-S complex solution was applied as precursor to fabricate SnO 2 electron selective layers (ESLs) for the hybrid perovskite solar cells (PSCs). The tin and sulfur powder were directly dissolved in a (NH 4 ) 2 S water solution to form Sn-S precursor. After depositon and annealing, the SnO 2 film was formed, presenting as a low cost and enviromental friendly method for preparation of ESL. The films showed excellent transmittance at visible wavelength range. Moreover, the method exhibited high compatibility for doping using Cu, Cd, Li, and Zn elements. Zn doping (0.05 M) in the as-prepared SnO 2 ESL significantly improved perovskite solar cells (PSCs) performance. The highest PCE of 13.17% was achived with 15% enhancement compared to that of undoped SnO 2 ESL samples. TiCl 4 modifications on SnO 2 film improved photovoltaic performance to 14.45%, but resulted in the poor long-term stability, around 80% more degredation than that of PSCs based on Zn-doped SnO 2 films.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Jiayi Guan,Jian Ni,Xiaojun Zhou,Yue Liu,Junyang Yin,Jinlin Wang,Dan Wang,Yaofang Zhang,Juan Li,Hongkun Cai,Jianjun Zhang
Among deposition methods, ultrasonic spray-coating has particularly strong potential for large-scale production due to its low cost and capability to produce thin films with large-scale areas for industrial applications. In this work, SnO2 electron transport layers (ETLs) were successfully prepared via ultrasonic spray-coating at a low temperature. A series of spraying parameters were optimized to adjust the drying process. Finally, compact pinhole-free ETLs with high transmittance and preeminent electron migration efficiency were obtained. The small-area perovskite solar cells (PSCs) (0.29 cm2) were fabricated based on the aforesaid SnO2 ETLs exhibiting a distinguished power conversion efficiency (PCE) of 18.72%. More than 85% of the original PCE was retained after the cells were stored in a drying tower (room temperature (RT), 30% relative humidity (RH)) for 1000 h without encapsulation, which reflects the remarkable stability of the devices. Moreover, minimodules (4 cm × 4 cm) were also fabricated successfully with a PCE of 10.57%.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Qiang Zhang,Qian Chen,Jiacheng Cao,Peiyuan Liu,Jian Wang,Zhiwei Yang,Jinhao Zhang,Jian Zhang,Lin Wang,Xiao Huang
Antimony (Sb) based compounds such as Sb 2 O 3 and Sb 2 S 3 have shown promises in electronics, catalysis and sensing devices. Their functional performances can be further improved by integration with other materials to from composites or heterostructures, which however, usually require tedious procedures with poor morphology control. Herein, we realized direct hydrothermal synthesis of Sb 2 O 3 /SnO 2 heterostructures and Sb 2 S 3 /SnS 2 heterostructures by using liquid-phase exfoliated two-dimensional (2D) Sb nanoflakes as precursors. Compared to directly using SbCl 3 salt as the reactant, using the Sb nanoflakes enabled the slow release of Sb 3+ ions which benefited the better controlled nucleation and growth of Sb 2 O 3 (or Sb 2 S 3 ) acting as growth templates for the further deposition of SnO 2 (or SnS 2 ). As a demonstration, the as-prepared Sb 2 S 3 /SnS 2 heterostructures were employed for photocatalytic methylene blue (MB) degradation, which exhibited a faster degradation rate compared to Sb 2 S 3 or SnS 2 alone. Our work offers an alternative strategy with elemental 2D materials as precursors for the preparation of heterostructured functional materials.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Rujia Hu,Wenjing Hou,Gaoyi Han,Ting Ou,Yunzhen Chang,Yaoming Xiao
The layered structure of perovskite solar cells determines the importance of interfaces. However, the differences in compositions and energy level always cause the undesired interface contact and defects fatally, especially for the SnO 2 /perovskite interface. These poor contacts and defects can influence the interface electron transfer and recombination dynamics. Therefore, modifying the SnO 2 /perovskite interface is necessary. Herein, we incorporate the L -cysteine as the interfacial chemical bridge between SnO 2 and perovskite. The higher electron concentration at -COOH of L -cysteine depends it can link to -OH on SnO 2 preferentially, and then the outward facing -NH 2 and -SH can coordinate with Pb, realizing the tight connection between SnO 2 and perovskite and accelerating the interface charge extraction. Besides, the coordination between L -cysteine and Pb depends that L -cysteine modification can regulate the crystallization and growth dynamics of perovskite and reduce the interface Pb defects. The performance parameters suggest that L -cysteine modification can promote the device performances.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）