JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wei Lu,Hongpo Liu,Shiquan Li,Jianhua Zhu,Yunfeng Chao,Zhuosen Wang,Yapeng Tian,Xinwei Cui
Sodium selenium (Na-Se) batteries are considered promising candidates for next-generation energy storage devices due to their high volumetric energy density. However, the Se cathode still faces the problems of the shuttling effect and sluggish selenium reduction kinetics. Improving the surface adsorption and catalytic process of selenium cathode can greatly solve the above issues and achieve excellent performance to enhance the application of Na-Se batteries. Herein, experimental and theoretical simulation results indicate that the boron and defects co-doped MXene (BD-MXene) could initiate the redistribution of electrons and improve the surface polarity, promoting chemical adsorption, thus effectively suppressing the shuttle effect. More importantly, the BD-MXene can promote the conversion between polyselenide, accelerating the electrochemical reaction kinetics of Sodium polyselenide. As a result, the obtained Se@BD-MXene exhibits a high rate performance of 502 mAh g −1 at 50 A g −1 (calculated based on Se@BD-MXene) and excellent cycling stability with a decay per cycle of 0.001 % over 4500 at 10 A g −1 . This work provides a viable strategy to design Se cathodes for Na-Se batteries with high-rate capability and long-term cycling.
研究领域:
材料科学
·
能源存储与转换
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qing Zhou,Meinan Yan,Yuzhou Sun,Yujiao Ma,Zihan Zhang,Haoyu Xu,Xiaoyun Teng,Chao Gao,Wei Yu
In this paper, we reported a novel precursor solution for the preparation of Cu 2 ZnSn(S,Se) 4 (CZTSSe) film. Large-grain monolayer CZTSSe film can be obtained by using the precursor solution. The influence of selenization temperature on the properties of CZTSSe films and solar cells were investigated. We found the monolayer CZTSSe film can be prepared with the selenization temperature as low as 510 °C. While an increased selenization temperature was used, the size of the crystalline grains in CZTSSe film increased significantly, but the decomposition of CZTSSe material got more serious. As the increase of the selenization temperature, increased short-circuit current (J SC ) can be achieved for the fabricated solar cell, which could be caused by the improved crystallinity of CZTSSe layer and the enlarged depletion width of solar cell (as much as 391 nm). On the other hand, the open-circuit voltage (V OC) decreased as the increase of selenization temperature, which may relate with the decomposition of CZTSSe material. The best solar cell achieved the efficiency of 11.4% (active area), which was based on CZTSSe film with the selenization temperature of 510 °C.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Ting-Ting Mao,Zhen Wei,Jun Cai,Yan-Xia Chen,Juan M. Feliu,Enrique Herrero
Se-modified platinum single-crystal surfaces in the [ 01 1 ¯ ] zone have been used as model electrocatalysts for the oxygen reduction reaction (ORR). The results show that: (1) the Pt(hkl)-[n(111)×(100)] electrodes display enhanced ORR electrocatalytic activity with Se modification. (2) Se adatoms have a double effect on the ORR kinetics at model Pt electrodes: they enhance the activity on the neighboring sites and inhibit the reaction on the sites in direct contact with the Se adatoms. (3) The hydrophobicity and the altered electronic properties are probably the reasons for the enhanced electrocatalysis for ORR with Se modification. The positive shift of the potential of zero free charge of Pt(hkl)@Se electrodes compared to that of un-modified Pt(hkl) are in agreement with these interpretations. (4) At very low coverages, the promotion effect of Se modification on ORR activity at (100) sites is stronger than that at (111) sites, which is probably due to the more pronounced hydrophobicity of the former.
研究领域:
电化学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guoquan Jiang,Rui Xue,Linxin He,Junchao Zhu,Nan Qiu,Yuan Wang
Aqueous Zn-ion batteries (AZIBs) are being extensively studied for promising energy storage applications owing to their advantages of excellent safety, and high theoretical capacity. Nevertheless, the Zn anode in electrolytes obstinately suffers from irreversibility issues, e.g., the low coulombic efficiency and dendrite growth during cycling. Thus, it remains a severe challenge to obtain high cycling stability of Zn anodes. Tuning zincophilicity has been a high-interest topic as a class of Zn anode optimization. Herein, tailoring zincophilicity via amorphous Se-rich selenides coating for a stable Zn anode is reported. The Zn foils were surface-modified by coating with intrinsic zincophobic selenide (i.e., WSe 2 and MoSe 2 , resulting in WSe 2 -Zn and MoSe 2 -Zn, respectively). Interestingly, a Se-rich layer with a particular amorphous structure was manufactured on the Zn anode. The enrichment of Se was electrochemically induced to form ZnSe, which improves zincophilicity of the Zn anode and provides nucleation sites for Zn ions. Accordingly, homogeneous deposition and exfoliation of Zn ions were promoted, and the growth of Zn dendrites during cycles was inhibited. Along with suppressed side-product generation, the outputs of AZIBs with modified electrodes were vastly improved. The symmetric batteries with selenides exhibit a low polarization and prolonged life over 1700 h. Besides, it is shown that the specific capacity and stability of the full batteries using sodium vanadate as cathodes are remarkably enhanced by selenide modification. Further, when assembled with Mn-based cathodes, good capacity retention (77.5% for WSe 2 -Zn, 74.7% for MoSe 2 -Zn, and 49.5% for pristine Zn) at 2 A/g was achieved over 3500 cycles. A facile route to tune intrinsic zincophobicity into zincophilicity is demonstrated, which brings about massive opportunities for developing high-performance electrode materials for AZIBs.
研究领域:
储能
·
材料科学
·
电化学
·
电池技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Mingran Zhou,Wenda Dong,Ao Xu,Zhiwen Yin,Zhi-Yi Hu,Xinling Wang,Liang Wu,Lihua Chen,Yu Li,Bao-Lian Su
Lithium-selenium batteries (LSeBs) have attracted increasing attention due to their excellent electronic conductivity and high theoretical specific capacity. However, there are still difficult problems such as low utilization rate and fast capacity decay in the actual application process. Herein, a surface iodine modified three-dimensional (3D) nano hollow carbon fiber (I-NHCF) network is designed and synthesized as Se host (Se@I-NHCF) for highly stable LSeBs. The surface iodine species induce the formation of robust cathode electrolyte interface (CEI), thus preventing the transformation of amorphous selenium to low-activity crystalline selenium and enabling stable electrochemical performance. Moreover, the surface iodine species promote rapid charge transfer, enhancing the chemical reaction kinetics and improving the utilization of the active Se species. As a result, the Se@I-NHCF cathode exhibits superior specific capacity of 581.8 mAh g −1 with a high stability (0.0054% capacity decay per cycle) after 500 cycles at 1C, and an excellent rate performance of 567.6 mAh g −1 at 2C. This work addresses the problem of rapid capacity decay by the formation of uniform and robust CEI to conserve highly reactive amorphous Se species, improve Se utilization, and achieve ultra-stable Li-Se batteries with high energy and long cycle life.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Haiping Lei,Jiguo Tu,Suqin Li,Jiacheng Wang,Zheng Huang,Zhijing Yu,Shuqiang Jiao
Aluminum-selenium (Al-Se) batteries, which possess a high theoretical specific capacity of 1357 mA h g −1 , represent a promising energy storage technology. However, they suffer from significant attenuation of capacity and low cycle life due to the shuttle effect. To mitigate the shuttle effect induced by soluble selenium chloroaluminate compound that tends to migrate towards the negative electrode, a quasi-solid-state Al-Se battery was fabricated through the synthesis of a multi-aperture structure quasi-solid-state electrolyte (MOF@GPE) based on metal–organic framework (MOF) material and gel-polymer electrolyte (GPE). The high ionic conductivity (1.13 × 10 −3 S cm −1 ) of MOF@GPE at room temperature, coupled with its wide electrochemical stability window (2.45 V), can facilitate ion transport kinetics and enhance the electrochemical performance of Al-Se batteries. The MOF@GPE-based quasi-solid-state Al-Se batteries exhibit outstanding long-life cycling stability, delivering a high specific discharge capacity of 548 mA h g −1 with a maintained discharge specific capacity of 345 mA h g −1 after 500 cycles at a current density of 200 mA g −1 . The stable ion transmission and high ion transport kinetics in MOF@GPE can be attributed to the stable structure and permeable channel of MOF , which effectively captures the soluble selenium chloroaluminate compound and further restrains the shuttle effect, resulting in improved cycling performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Peicheng Huang,Weichun Yang,Varney Edwin Johnson,Mengying Si,Feiping Zhao,Qi Liao,Changqing Su,Zhihui Yang
The contamination of soils by mercury (Hg) seriously threatens the local ecological environment and public health. S-functionalized amendments are common remediation technology , yet, Hg re-activation often occurs in the commonly used immobilization remediation by S-functionalized amendments, resulting in an unsatisfactory remediation effect. In this study, a novel FeS–Se functionalized biochar composite (FeS-Se-BC) amendment was prepared and applied for the efficient remediation of Hg-polluted soil. An immobilization efficiency of 99.62% and 99.22% for H 2 O-extractable Hg and TCLP solution-extractable Hg was achieved with the application of FeS-Se-BC (0.05) after 180 d. The analyses of XPS, Hg-TPD, SEM-EDS demonstrated that excellent remediation performance by FeS-Se-BC resulted from the synergistic effect of FeS and Se to form HgS and HgSe concurrently. In comparison to the treatments of biochar and FeS-functionalized biochar (FeS-BC), FeS-Se-BC promoted the transformation of exchangeable, carbonate-bound, and Fe–Mn oxides-bound Hg fractions into organic material-bound, and residual fractions, effectively reducing the risk of Hg-contaminated soil from a highly dangerous level to a low risk. Furthermore, the introduction of Se clearly inhibited the re-activation of Hg and reduced the release of Hg by 81.12% compared to FeS-BC when the ratio of S 2− to Hg was 5: 1 due to the formation of extremely stable HgSe. These results suggest that FeS-Se-BC has good potential for remediation of Hg-polluted soils which provides a new inhibitory idea for Hg re-activation after immobilization.
研究领域:
环境科学
·
土壤修复
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Wenjuan Chen,Jinting Wu,Yunfei Zhang,Wan Liu,Zhen-Feng Huang,Ji-Jun Zou,Yong-Chao Zhang,Xiao-Dong Zhu
The high cost of catalysts remains a major bottleneck for water electrolysis hydrogen production, making the development of cost-effective and efficient non-precious-metal catalysts an urgent priority. In this study, we synthesized selenium vacancy-rich iron selenide (Fe₃Se₄) through electro-precipitation method. Combined theoretical calculations and experimental characterization confirm that these selenium vacancies serve as highly efficient active sites, effectively modulating the local electronic structure of Fe centers and optimizing their adsorption behavior toward reaction intermediates. In the oxygen evolution reaction (OER), this defective structure significantly enhances water molecule adsorption and dissociation while minimizing the activation energy barrier of the rate-determining step. Benefiting from these features, the Se-deficient Fe₃Se₄ catalyst exhibits high OER performance, requiring only 274.8 mV overpotential to achieve 50 mA·cm⁻² while demonstrating remarkable stability for 100 h at 100 mA·cm⁻², highlighting its rapid OER kinetics.
研究领域:
材料科学
·
电催化
·
能量转换
·
计算化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Linan Feng,Penglu Yu,Chan Liu,Jinle Lan,Yuan-Hua Lin,Xiaoping Yang
In this work, ultrahigh-performance single-walled carbon nanotube (SWCNT)/Se nanowire (NW)/poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) ternary thermoelectric (TE) nanocomposite films are successfully designed by rational design of CNT/Se/PEDOT:PSS ternary nanocomposites. The addition of CNTs apparently improves the electrical conductivity of composite films, resulting in a relatively huge growth of the power factor. The PEDOT:PSS interface layers uniformly attach on both sides of the Se NWs and CNTs effectively, forming a tightly interleaving and interconnected three-dimensional network. As a consequence, a maximum power factor of 863.83 μW/(m·K2) has been achieved for the sample containing 26 wt % CNTs at 434 K. Ultimately, a flexible TE generator prototype consisting of 5-unit freestanding composite film strips is fabricated using the optimized composite films, which can generate a maximum output power of 206.8 nW at a temperature gradient of 44.7 K. Therefore, the present work has a further potential to be used for the flexible polymer/carbon TE nanocomposite films and devices.
研究领域:
材料科学
·
纳米技术
·
热电学
·
复合材料
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Zili Ma,Ziying Wen,Cuiping Gu,Yanjun Yin
Achieving ideal photoelectrochemical (PEC) water splitting efficiency for renewable chemical fuel generation is a highly preferable but a challenging target. To do so, much effort needs to be taken to investigate photoelectrodes. In this study, we report the amelioration of hematite (α-Fe2O3), which is a well-known semiconducting oxide suitable for PEC water oxidation. The Se-doped α-Fe2O3 nanowire array thin film on the fluorine-doped tin oxide substrate was synthesized by a facile one-step hydrothermal process followed by in situ two-step annealing at 823 and 1073 K. A photocurrent of 0.85 mA cm–2 at 1.23 V versus RHE was achieved for the Se-doped α-Fe2O3 photoanode, which was more augmented than the undoped α-Fe2O3 photoanode (0.33 mA cm–2). The Mott–Schottky plot revealed that the carrier concentration of α-Fe2O3 was strongly increased through Se doping. Photovoltage and electrochemical impedance spectroscopy indicated that Se-doped α-Fe2O3 exhibited a stronger driving force and reduced charge transport resistance, which were crucial aspects for higher photocurrent. Our work highlights the importance of the nonmetal element dopant to improve the PEC performance of α-Fe2O3 via convenient preparation.
研究领域:
材料科学
·
能源科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 3.9
Hu T. T.,Xie Y. X.,Zhao K.,Yang X. S.
Trace oxygen-doped FeSe 0.4 Te 0.6 single crystals were synthesized using the self-flux method to investigate the effects of oxygen incorporation on their crystal structure, superconducting transition, and flux pinning properties. Experimental results indicate that trace O-doping effectively modulates the superconducting transition temperature ( T c ) and enhances the critical current density ( J c ), with a more pronounced improvement in current-carrying capacity observed under high magnetic fields. Based on the Dew–Hughes model analysis, the sample with 0.5% O-doping exhibits the most robust pinning effect. This study demonstrates that trace oxygen doping can effectively optimize the superconducting performance of FeSe 0.4 Te 0.6 and reveals the existence of an optimal doping regime, which provides valuable insights into the mechanism and practical application of iron-based superconductors.
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产品关联
DOI
高影响因子
Solar RRL
·
2019
·Vol. 4
·期 1
·1900410
·
IF 0
Qiong Yan,Shuying Cheng,Xue Yu,Hongjie Jia,Junjie Fu,Caixia Zhang,Qiao Zheng,Sixin Wu
Partial cation substitution is an effective way to inhibit defects and carrier recombination, which can improve the efficiency of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells. Herein, flexible Cu 2 Zn 1− x Cd x Sn(S,Se) 4 ( x = 0–15%) solar cells are fabricated on Mo foils with partial Cd substitution for Zn via a green solution-process. The best device performance can be achieved when Cd/(Zn + Cd) = 8%, with an efficiency up to 6.49% and a significantly improved device repeatability. The E U decreases from 24 to 15 meV, indicating that antisite defects and band tailings are effectively suppressed. C – V data reveal that W d and V bi are enhanced after doping Cd, resulting in a stronger built-in electric field which facilitates Fermi-level splitting and hence increases band bending of the absorber toward the junction interface. Furthermore, the mechanism of current shunting is studied using an equivalent circuit model with three parallel current pathways to fit J – V curves. The key parameters for the solar cell diode such as A , J 0 , and R sh are significantly improved by partially substituting Zn with Cd, demonstrating that current shunting loss is suppressed and the junction quality is improved, resulting in a significant improvement in device repeatability.
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DOI
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