APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dongqing Xu,Luting Shi,Xianqiang Li,Yapeng Tian,Zhuosen Wang,Xinwei Cui
Due to the accumulation of soluble polysulfides during the process reaction process, the shuttle effect emerges and significantly impacts the electrochemical performance. The development of novel efficient catalysts and adsorbents is a very popular way to fabricate the sulfur host materials. MXene as one of the most novel and popular materials have been wildly used in electrochemical energy storage. While the limited catalytic activity and adsorption capacity hindering its application in lithium sulfur batteries. Here, we introduced boron atoms as dopants in a creative modification of MXene (B-MXene). The introduced B atoms can effectively mitigate the “shuttle effect” through chemical adsorption, owing to their electron-deficient nature. Furthermore, the introduction of boron atoms and vacancy can modify the electronic structure, enhancing the catalytic activity of MXene by providing empty perpendicular-orientation orbitals. As a result, B-MXene exhibited excellent electrochemical performance, maintaining at 943 mA h g −1 at a current density of 1.0C, after 500cycles, with a corresponding decay rate as low as 0.046 %. This work proposes an efficient strategy to fabricate highly efficient electrocatalysts for advanced lithium-sulfur batteries (Li-S batteries).
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
催化化学
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DOI
高影响因子
Batteries & Supercaps
·
2024
·Vol. 7
·期 8
·e202400089
·
IF 5.1
Min Qing,Zhi Hui Hao,Xiangwei Zhao,Qin Dong,Zhimin He,Wei Hong,Rong Li
Lithium-sulfur batteries (LSBs) are seriously impeded by poor reaction kinetics and the polysulfides shuttling, leading to low utilization of sulfur and poor cycling performance. Herein, amorphous MoS 2 /MoO 3 nanosheets are prepared by a one-step formamide (FA)-assisted strategy. Due to the merits of high adsorption capability and good catalytic activity of MoS 2 , relatively high electronic conductivity and strong polarity of MoO 3 , and abundant active sites of amorphous nanosheet structure, the LSBs based on amorphous MoS 2 /MoO 3 -2 nanosheets coated separator exhibit an outstanding specific capacity (1420.2 mA h g −1 at 0.1 C), excellent rate capacity (505.4 mA h g −1 at 5 C), and long cycle life (a negligible decay rate of 0.063 % per cycle at 0.5 C). This work provides an idea for designing efficient amorphous catalytic materials in LSBs. Graphical Amorphous MoS 2 /MoO 3 nanosheets with high adsorption capability, good catalytic activity, and abundant active sites are employed as high-efficient polysulfide barrier in Li−S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
催化化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Chunmin Li,Jie Zhang,Ruidan Shi,Jichun Xiang,Tao Wang,Guangri Xu,Kelei Zhuo
In this study, the polysulfide-intercalated Mg/Al hydrotalcite (Mg/Al-S 2 -LDH) with nanometer scale was prepared by a facile intercalation reaction to remove uranyl (VI) from aqueous solution. The as-synthesized adsorbents were characterized by a variety of techniques such as XRD, SEM, EDS, FTIR, laser particle size analyzer and XPS. Results indicated that the alkali content (governed by the HMT/Al molar ratio parameter f) significantly influenced the particle size, rather than the morphology, of the Mg/Al hydrotalcite. The particle size decreased from 9.37 μm to 0.91 μm with increasing f value. Batch experiment results indicated that Mg/Al-S 2 -LDH adsorbent prepared at f = 3 exhibited the excellent removal performance for uranyl (VI) with the removal rate approaching 100% and a maximum adsorption capacity of 343.64 mg·g −1 . The adsorption process followed the pseudo-second-order model, and the adsorption thermodynamics conformed to Langmuir isotherm adsorption model, indicating that the adsorption process was primarily chemical adsorption and monolayer adsorption. The adsorption mechanism revealed that uranyl (VI) ions were removed by the UO 2 2+ forms inner-sphere complexes with interlayer S 2 2− groups and the formation of an amorphous UO 2 S 2 -like phase on the surface. In addition, results from competitive adsorption suggested that Mg/Al-S 2 -LDH adsorbent processed excellent affinity to uranyl (VI) in the co-exist ions of Na + , K + , Ca 2+ , Mg 2+ , which revealed a potential application prospect in the treatment of U(VI)-contaminated wastewater.
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 10
·1-10
·
IF 2.8
Jiang Bihe,Zhang Zhihui,Shi Jianze,Liu Siyuan,Li Dazhen,Cao Zengwen
In this study, a mercaptan-disulfide exchange mechanism was used to modify liquid polysulfide rubber through the reaction between JLY155 and 1,6-hexanedithiol to reduce the viscosity of the liquid polysulfide. The results indicated a decrease in the viscosity and molecular weight of JLY155 and a notable improvement in the peeling strength of the prepared polysulfide sealant, demonstrating an approach to facilitating sealant preparation without sacrificing mechanical performance. Compared to JLY155, the modified liquid polysulfide rubber exhibited a reduction in viscosity, and the reduction extent could be modulated by adjusting the ratio of JLY155 and 1,6-hexanedithiol. The mechanical properties of the prepared polysulfide sealant demonstrated optimal results at a molar ratio of 4:1 between the reactants and Tris(dimethylaminomethyl)phenol (DMP30) catalyst at a loading of 0.05 wt%. The tensile strength of the prepared polysulfide sealant reached 2.38 MPa with an elongation at break of 119.68%, and the sealant exhibited excellent peel performance, undergoing substrate failure rather than adhesion failure. This was associated with a slightly lowered storage modulus (E’) in dynamic mechanical analysis. However, increasing the amount of DMP30 catalyst increased the efficiency of the thiol-disulfide bond exchange reaction and accelerated the sealant’s curing process in later stages, consequently reducing the elongation at break.
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DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Chenglin Wei,Mengdi Sun,Baoguo Zhang,Zhangyong Yan,Zihao Dang,Yongkang Xu,Lin Wu,Ya Hu
Benefiting from the low cost and natural abundance of sulfur, as well as its excellent theoretical performance metrics - including a capacity of 1675 mAh g −1 and an energy density of 2600 Wh kg −1 - lithium-sulfur (Li-S) batteries have attracted considerable attention for next-generation energy storage. However, their practical deployment is severely hindered by the intrinsic shuttle effect of lithium polysulfides (LiPSs), which leads to the loss of active materials and poor cycling stability. In this work, we report a facile hydrothermal-calcination strategy to synthesize porous nanosheet-structured Fe-doped nickel oxide (Fe-NiO) as a functional separator modifier for Li-S batteries. The polar nature of NiO enables strong chemical interactions with LiPSs, effectively anchoring polysulfides on the cathode side and suppressing the shuttle effect. Furthermore, Fe doping significantly increases the density of surface active sites, thereby enhancing the adsorption and catalytic conversion of LiPSs into insoluble Li 2 S 2 /Li 2 S species, which promotes redox kinetics and mitigates capacity fading. When applied to Li-S cells, the Fe-NiO-modified separator markedly improves the electrochemical performance, delivering a high reversible capacity of 1150 mAh g −1 at 0.2C, an excellent rate capability of 505 mAh g −1 at 5C, and outstanding long-term stability with a minimal capacity decay of 0.091 % per cycle over 500 cycles at 1C. This study presents a simple and scalable strategy for separator engineering, providing a promising pathway toward high-performance Li-S batteries.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 45
·2511172
·
IF 19
Xiangyang Zhao,Jiayu Wang,Wenqi Zhao,Zihao Song,Qingli Zou
Electrolyte engineering plays a crucial role in the design of high energy-density lithium-sulfurized polyacrylonitrile (Li-SPAN) batteries, a promising energy storage technology. However, current predominant electrolyte systems face challenges of anode dendrite growth and cathode polysulfide loss, which limit the cycling stability of Li-SPAN batteries. Here, a weakly solvating electrolyte (WSE) primarily composed of diethoxy methane (DEM) is proposed to simultaneously address challenges at both electrodes. At the anode, DEM's weakly solvating capability accelerates both Li + diffusion and desolvation, preventing out-of-plane Li deposition and dendrite formation caused by high concentration gradients at the anode surface. More significantly at the cathode, weakly solvated Li + exhibits stronger Lewis acidity, preferentially stabilizing S 3 2− intermediates via hard Lewis acid-base interaction. These higher-reduction-state intermediates promote faster subsequent lithiation and deposition reactions, reducing polysulfide loss while improving both rate and cycling performance of the batteries. These performance enhancements and the corresponding mechanisms are supported by electrochemical and spectroscopic characterizations. With this WSE, Li-SPAN batteries achieve exceptional cycling stability (0.087% capacity fade per cycle over 500 cycles at 1 C), and pouch cell cycle life increases from 9 to 35 cycles with 90.6% capacity retention. This strategy provides valuable insights for developing high-performance Li-SPAN batteries.
研究领域:
电化学
·
储能
·
电池技术
·
材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Runling Xu,Keng Xuan,Shikun Chen,Shuai Yan,Jun Wan,Kaixuan Zhao,Yaoping Guo,Mingxin Zheng,Ruowei Liang,Meiyu Jia,Yadan Guo
Efficient capture of uranium (VI) from wastewater holds great importance for environmental remediation and sustainable development of nuclear energy. Herein, polysulfide PS-HEA-X with grafted hydrophilic groups was fabricated as an efficient adsorbent for the capture of uranium (VI) in water by using 2-hydroxyethyl acrylate (HEA) as a hydrophilic regulator. The practical maximum uranium (VI) adsorption capacity of hydrophilic PS-HEA-20 reached 638.29 mg/g, which was about 24 times that of hydrophobic PS-HEA-0 synthesized without HEA modifier. The uranium (VI) adsorption capacity of PS-HEA-20 per unit surface area reached 124.42 mg/m 2 , which outperformed most reported absorbents. Structure-performance relations indicated that the grafted –OH, –COO- groups improved the hydrophilicity of PS-PEA-20, hereby facilitating the diffusion of uranium (VI) in solution to the surface of PS-PEA-20. Adsorption mechanism investigation results showed that UO 2 2+ were captured by the surface S atoms of PS-HEA-20 through soft acids-soft base interaction. PS-HEA-20 exhibited excellent reusability and the adsorption capacity remains higher than 90 % after five cycles using Na 2 CO 3 solution as eluent. This work not only expands the application of S-based polymer for efficient capture of uranium (VI) from water, but also offers a facile strategy for the fabrication of polysulfide for the capture of uranium (VI) and other heavy metal ions.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Green Energy & Environment
·
2021
·
IF 8.207
Fantao Meng,Yuang Zhang,Shufen Zhang,Benzhi Ju,Bingtao Tang
Along with the environmental pollution, the scarcity of clean water seriously threatens the sustainable development of human society. Recently, the rapid development of solar evaporators has injected new vitality into the field of water purification. However, the industry faces a considerable challenge of achieving comprehensive purification of ions, especially the efficient removal of mercury ions. In this work, we introduce an ideal mercury-removal platform based on facilely and cost-effectively synthesized polysulfide nanoparticles (PSNs). Further development of PSN-functionalized reduced graphene oxide (PSN-rGO) aerogel evaporator results in achieving a high evaporation rate of 1.55 kg m −2 h −1 with energy efficiency of 90.8% under 1 sun. With the merits of interconnected porous structure and adsorption ability, the photothermal aerogel presents overall purification of heavy metal ions from wastewater. During solar desalination, salt ions can be rejected with long-term stability. Compared with traditional water purification technologies, this highly efficient solar evaporator provides a new practical method to utilize clean energy for clean water production.
研究领域:
环境科学
·
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 3
·035507
·
IF 1.929
Weimin Guo,Qinglin Zhu,Qinghua Lu
Li–S battery has high theoretical specific capacity and specific energy, but the shuttle effect challenges its commercial application. So many composite materials had been prepared to conquer it. In this research, MCNT/MoS2/S composite and MCNT/MoS2/S composite cathode were prepared respectively by a facile hydrothermal method and by melt diffusion method. MoS2 and MCNT showed uniformly combined together by SEM and TEM. The electrochemical properties of the MCNT/MoS2/S cathode were carried out on a Gamry electrochemical workstation. The initial capacity arrive 820 mAh·g−1 at 0.1 C, and specific capacities up to ∼460 mAh·g−1 over more than 300 cycles at 0.5 C. The improvement of electrochemical performance due to MoS2 strongly adsorbing polysulfide and the conductivity network of MCNT.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2018
·
IF 1.1
Ruyuan Jiang,Niantao Liu,Yuhong Su,Sanshuang Gao,Xamxikamar Mamat,Thomas Wågberg,Yongtao Li,Xun Hu,Guangzhi Hu
An integrative electroanalytical method was developed for detecting Cd 2 + and Pb 2 + ions in aqueous solutions. Polysulfide/graphene (RGO-S) nanocomposites were prepared and their performance as electrochemical sensors for Cd 2 + and Pb 2 + was evaluated. The RGO-S nanocomposite was carefully characterized by scanning electron microscopy with energy-dispersive X-ray spectrometry, transmission electron microscopy, and X-ray photoelectron spectroscopy. The as-prepared RGO-S was incorporated into a pyrolytic graphite electrode (RGO-S/PGE) and used for detecting trace amount of Cd 2 + and Pb 2 + by differential pulse anodic stripping voltammetry. Under optimal conditions, the stripping peak current of RGO-S/PGE varies linearly with heavy metal ion concentration in the ranges 2.0–300 μ g L − 1 for Cd 2 + and 1.0–300 μ g L − 1 for Pb 2 + . The limits of detection for Cd 2 + and Pb 2 + were estimated to be about 0.67 μ g L − 1 and 0.17 μ g L − 1 , respectively. The prepared electrochemical heavy-metal-detecting electrode provides good repeatability and reproducibility with high sensitivity, making it a suitable candidate for monitoring Cd 2 + and Pb 2 + concentrations in aqueous environmental samples.
研究领域:
环境科学
·
材料科学
·
分析化学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 46
·465401
·
IF 3.404
Chengxing Li,Kun Gao,Zhipan Zhang
The poor conductivity of sulfur and the shuttle effect of soluble polysulfides have considerably hindered the practical application of lithium–sulfur (Li–S) batteries. Here, we have fabricated a three-dimensional graphitic carbon nitride/reduced graphene oxide (GCN@rGO) network as the sulfur host in Li–S batteries, where the bifunctional GCN strongly binds polysulfides through a chemical interaction and catalyzes the redox reactions of polysulfides. Additionally, GCN coating is also applied to different membranes and when these GCN-coated-membranes (GCMs) are used as separators, they are found to effectively act as the polysulfide barrier to suppress the diffusion of polysulfide intermediates to the Li anode and thus ameliorate the shuttle effect. As a result, the Li–S battery assembled from the GCN@rGO/S cathode and GCM separator exhibited a high initial specific capacity of 1000.6 mAh g−1 at 0.1 C and 87% capacity retention with 0.066% decay per cycle over 200 charge−discharge cycles at 0.5 C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Genlin Liu,Cheng Yuan,Pan Zeng,Chen Cheng,Tianran Yan,Kehua Dai,Jing Mao,Liang Zhang
Utilizing catalysts to accelerate the redox kinetics of lithium polysulfides (LiPSs) is a promising strategy to alleviate the shuttle effect of lithium–sulfur (Li–S) batteries. Nevertheless, most of the reported catalysts are only effective for LiPSs reduction, resulting in the devitalization of catalysts over extended cycles as a consequence of the continuous accumulation of Li 2 S passivation layer. The situation gets even worse when employing mono-directional catalyst with poor electron conductivity because the charge transfer for the decomposition of solid Li 2 S is severely hampered. Herein, a high-conductive and dual-directional catalyst Co 3 C decorated on porous nitrogen-doped graphene-like structure and carbon nanotube (Co 3 C@PNGr-CNT) is fabricated as sulfur host, which not only promotes the precipitation of Li 2 S from LiPSs during discharge but also facilitates the decomposition of Li 2 S during subsequent charge, as evidenced by the reduced activation energies for both reduction and oxidation processes. Furthermore, the long-term catalytic stability of Co 3 C is corroborated by the reversible evolution of Co–C bond length over extended cycles as observed from X-ray absorption fine structure results. As a consequence, the fabricated Co 3 C@PNGr-CNT/S cathode delivers a low capacity decay of 0.043% per cycle over 1000 cycles at 2C. Even at high sulfur loading (15.6 mg cm −2 ) and low electrolyte/sulfur (E/S) ratio (∼8 μL mg −1 ) conditions, the battery still delivers an outstanding areal capacity of 11.05 mAh cm −2 after 40 cycles. This work provides a rational strategy for designing high-efficient bidirectional catalyst with single component for high-performance Li-S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）