JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wutao Wei,Xi Jia,Xuyan Qin,Zhikai Wang,Yide Zhang,Fang He,Liwei Mi
Magnesium/lithium-sulfur hybrid batteries (ML-SHBs) are considered to be the strongest candidate to replace lithium-ion batteries (LIBs) due to their high volumetric energy density and dendrite-free. In this study, S@FeS 2 /CoS 2 was prepared on the basis of a hollow, eggshell-shaped construction by using the less-liquid method. In this method, the reactants carry water of crystallization during the reaction to provide a liquid environment, and the metal ions on the surface of the droplets promote the formation of S@FeS 2 /CoS 2 . The configuration of the eggshell facilitates the generation of additional reaction interfaces, thereby expediting the interaction with the electrolyte and facilitating transport processes. This structure promotes efficient charge transfer and accelerates the transport rate. By implementing strategies such as heterostructure building and bimetallic doping, the controllable construction of the morphological structure can be realized. The induced effect of heterostructured interfaces can be excited within the nanocrystals to form an electric field, which effectively reduces the ion diffusion barrier and synchronously enhances the interfacial electron transfer efficiency by modulating the electronic behavior. The discharge specific capacity of the cell was found to be 1096.73 mAh g −1 at a current density of 200 mA g −1 , exhibiting a high rate capacity. The Coulombic efficiency remained at 99.8 % after 100 cycles at a current density of 500 mA g −1 .
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zihan Huang,Zhixuan Zhang,Yifeng Han,Liya Rong,Hongling Yao,Changwen Li,Xianbao Wang,Tao Mei
The practical application of high-performance lithium‑sulfur batteries (LSB) was primarily hindered by polysulfides shuttling and sluggish sulfur redox kinetics. To overcome these limitations, this study introduces a multifunctional three-phase heterostructured TiO 2 /ZnS@MXene catalyst engineered to synergistically combine high adsorption capacity and strong catalytic activity. The TiO 2 component, known for its' strong chemical affinity and ZnS, serving as an efficient electrocatalyst, were homogeneously anchored onto the highly conductive MXene substrate via in situ growth. Additionally, the MXene hollow microsphere structure effectively inhibited the self-stacking of lamellar host to ensure the maximum exposure of the active sites, providing a favorable buffer space for the volume expansion throughout the reaction process. The elaborately integrated TiO 2 /ZnS@MXene heterostructure provides a synergistic effect to realize the function of sequential capture-diffusion-transformation of sulfur species throughout the reaction process. As a result, the LSB containing TiO 2 /ZnS@MXene heterostructures could retain 821.7 mAh g −1 after 1000 cycles at 1C with only 0.010 % capacity decay per cycle. Even with a sulfur content of 5.8 mg cm −2 and lean electrolyte conditions (5.1 μL mg −1 ), it still delivers an area capacity of 4.1 mAh cm −2 at 0.2C.
研究领域:
材料科学
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电化学
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能源存储
·
纳米材料
·
催化化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 18
·15234-15239
·
IF 3.289
Weikun Zhang,Chong Lin,Shan Cong,Junyu Hou,Bin Liu,Fengxia Geng,Jian Jin,Minghong Wu,Zhigang Zhao
Li–S batteries are regarded as one of the most promising energy-storage devices due to their high theoretical energy density, five times higher than that of lithium-ion batteries (2600 vs. ∼500 W h kg−1). However, the polysulfide shuttle effect is the primary challenge for future applications of Li–S batteries. Herein, a novel barrier layer material, nonstoichiometric W18O49 nanowires, is reported to alleviate the undesirable shuttle effect, thereby largely boosting the specific capacity and cyclability of Li–S batteries. Without particular cathode design, the introduction of W18O49 nanowires enables the commercially available micro-sized sulfur cathode with 70% sulfur loading to deliver a respectable initial discharge capacity of 1142 mA h g−1 and retain a specific capacity of about 809 mA h g−1 after 50 cycles, even at a current density of 0.5 A g−1. To the best of our knowledge, such a capacity fading for Li–S batteries based on high loading of commercial micro-sized sulfur has been rarely reported.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 1
·1-12
·
IF 2.8
Lu Xi,Meng Yanshuang,Wang Xin,Xiao Mingjun,Xu Yishan,Zhu Fuliang
Uniformly distributed NiCo 2 S 4 nanoparticles on hollow carbon spheres were prepared by carbonisation and in-situ vulcanisation methods as a positive electrode host for lithium–sulphur batteries. Among them, carbon hollow spheres can provide a huge internal cavity, which prevents volume expansion during the charge and discharge process. At the same time, the physically limit the dissolution of polysulfides in the electrolyte and can also provide high conductivity. The NiCo 2 S 4 nanoparticles on the surface can establish a specific polar environment for charge and discharge and can interact with polysulfides to mitigate the loss of active materials through chemical adsorption. Under the synergistic effect of NiCo 2 S 4 and carbon hollow spheres, the electrode with a special structure of NiCo 2 S 4 /carbon hollow spheres as sulfur host exhibits excellent long cycle performance. At a current density of 335 mA g −1 , it still has a high discharge specific capacity of 526 mAh g −1 after 500 cycles.
研究领域:
材料科学
·
电化学
·
储能
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DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2019
·
IF 0
Jianhui Li,Wei Wei,Lingjie Meng
Lithium-sulfur (Li–S) batteries with high energy density are promising candidates to satisfy emerging energystorage demands. Nevertheless, the poor conductivity of sulfur and fast capacity decay of the sulfur-based electrodes restrict its practical applications. Here, we report a facile and simple titration method to synthesize nano-sulfur@liquid-phase exfoliated graphene (Nano-S@LEGr) composites by in situ growth of nanostructural sulfur on the LEGr surface. The as-prepared Nano-S@LEGr with tunable sulfur morphologies exhibited excellent electrochemical performance as the cathode material for Li–S batteries. In particular, the spherical Nano-S@LEGr composites with 68 wt% sulfur displayed a reversible capacity of 552.8 mAh g −1 after 100 cycles at a current density of 0.5C. Even at a high current density of 1C, a discharge capacity of 532.8 mAh g −1 could be delivered. Compared to rod-like Nano-S@LEGr and the graphene oxide derived cathode, the as-prepared spherical Nano-S@LEGr showed higher specific capacity, superior cycling stability and rate capability.
研究领域:
材料科学
·
能源存储技术
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DOI
Advanced Energy Materials
·
2018
·Vol. 8
·期 12
·1702373
·
IF 21.875
Wenlu Wu,Jun Pu,Jian Wang,Zihan Shen,Haiyan Tang,Zhentao Deng,Xinyong Tao,Feng Pan,Huigang Zhang
Lithium–sulfur (Li–S) batteries suffer from some serious issues, such as volume expansion, polysulfide migration, and so on, which lead to inferior rate properties, low Coulombic efficiency, and poor cycling stability. To a great extent, the significantly changing polarities, conductivities, and solubilities of sulfur species complicate these issues and make them hard to deal with. In this study, a biomimetic bipolar microcapsule is developed via bacteria fermentation and chemical modification. The biomimetic hierarchical microcapsule has a nonpolar core to load active materials and a polar shell to “selectively” control mass transport in and out. Each capsule acts as a microreactor, which adsorbs sulfur with the porous carbon core, retards polysulfide migration with the polar TiO 2 shell, and only facilitates lithium ion diffusion through the shell. The advantages of bipolar microcapsules are able to concurrently address S hosting, electron conducting, and polysulfide migration issues in particle scales instead of electrode scales. Because the resulting sulfur cathodes effectively interact with all sulfur species and confine them inside microcapsules, those intractable issues that lead to poor cycling properties are significantly managed. Thus, a high specific capacity and excellent cycling stability are achieved by using this novel structure design.
研究领域:
材料科学
·
电化学
·
仿生学
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DOI
高影响因子
Matter
·
2024
·
IF 17.3
Tao Wang,Qin Dong,Fangzheng Wang,Rui Xu,Cheng Tong,Die Su,Minhua Shao,Cunpu Li,Zidong Wei
SUMMARY
Sulfur cathodes can be paired with lithium metal anodes to construct
lithium-sulfur (Li-S) batteries. However, the dissolution of high-order
lithium polysulfides (Li2Sn, 4%n%8) and the poor conductivity of sulfur
cathodes must be addressed before they can be successfully commercialized. In this paper, we report a metal-organic framework (MOF)-
derived composite, Co4N&CoNx@Ti3C2, as a catalytic sulfur carrier to
moderate the interconversion of S species to achieve a high-performance Li-S battery. Heavy and functionless metallic Co particles derived
from MOF pyrolysis were converted to functional Co4N to construct
porous catalytic sites. Electrons can be rapidly transported through
the electronic conductor Ti3C2 substrate. The mechanism of the
Co4N&CoNx to catalyze the interconversion reaction of polysulfides
was both quantitatively and qualitatively revealed from a molecular
orbital vision. The prepared Co4N&CoNx@Ti3C2 cathode battery can
generate a high reversible capacity of 978.2 mAh g1 at 2C and demonstrates excellent stability. The assembled Co4N&CoNx@Ti3C2/S electrode Li-S pouch battery can deliver up to 396 Wh kg1 actual energy
density and can stably function for more than 250 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Geochemistry
·
2024
·
IF 2.6
Zhicheng Liu,Fen Jiao,Yanfang Cui,Xiang Lin,Wenqing Qin,Qian Wei
The high content of pyrite in high‑sulfur lead–zinc sulfide resources affects the electrochemical properties and floatability of galena and sphalerite, which results in difficult flotation separation. In this study, the negative effects of a high-alkaline process were weakened by introducing an efficient mixed depressant CaO + Na 2 SO 3 in selective flotation separation of galena from pyrite. Flotation separation tests of real ore samples showed that the mixed depressant was more efficient than single CaO (5000 g/t), and the best process conditions of Pb grade 64.01 % and Pb recovery 88.45 % were obtained. The effects of Na 2 SO 3 on the electrochemical interaction between the two minerals were studied by micro-flotation tests, electrochemical, ion dissolution, UV–Vis measurements, zeta potential measurements, and X-ray photoelectron spectroscopy (XPS) detections. Results indicated that Na 2 SO 3 could weaken the galvanic interaction between galena–pyrite and reduce the Pb 2+ dissolution from the galena surface. Na 2 SO 3 could desorb the collector ethyl xanthate pre-adsorbed on the pyrite surface.
研究领域:
矿物加工工程
·
电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Bo Yuan,Jianxun Zhao,Wanqiang Liu,Heng Liu,Peng Chen,Lianshan Sun,Xin Guo,Xinwei Wang,Weixuan Zhang,Rui Zhang,Fang Wang
The introduction of heterostructure in the cathode material of Li-S battery is an effective method to improve the redox reaction kinetics and suppress the shuttle effect of polysulfide . A metal sulfide/metal selenide (NiS 2 /NiSe 2 ) heterostructure with hollow tetrahedral structure is prepared as a sulfur host of lithium-sulfur batteries. The prepared NiS 2 /NiSe 2 heterostructure exhibits efficient charge transfer at the heterojunction interface, thereby enhancing catalytic activity for redox reactions of polysulfides and facilitating their rapid conversion. Moreover, the unique hollow tetrahedral structure, along with abundant surface pores, enables high sulfur loading capacity, providing abundant electrochemical reaction sites to enhance sulfur utilization efficiency. The results demonstrate that the NiS 2 /NiSe 2 heterostructure material exhibits a remarkable initial capacity of 1338.9 mAh/g at 0.2 C, along with exceptional cycling stability (maintaining a capacity of 517.6 mAh/g after 200 cycles at 0.2 C, with only a negligible decay rate of 0.3% per cycle, retaining a capacity of 462.6 mAh/g after 500 cycles at 1 C, with an insignificant decay rate of merely 0.12% per cycle). The facile preparation of this NiS 2 /NiSe 2 heterostructure not only enables the realization of lithium-sulfur batteries with exceptional capacity, but also opens up broader avenues for exploring high-performance heterogeneous materials .
研究领域:
材料科学
·
能源存储与转换
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Fujie Liu,Tianqi Huang,Mengyue Chen,Jing He,Hongping Li,Chao Wang,Huaming Li,Ming Zhang
Due to the increased concern on the environmental issues, the desulfurization process in fuel is of great importance in the recent decades. Herein, a series of decavanadate-based poly (ionic liquids) with varied substituents were successfully prepared by a facile ion exchange method, which were employed in aerobic oxidative desulfurization of aromatic sulfides. The prepared samples can achieve deep desulfurization on different aromatic sulfides under optimal reaction conditions. Additionally, the experimental results indicated that the long carbon chains in the imidazole ring could hinder the ion exchange process between decavanadate and PILs due to steric hindrance effect, resulting in the poor desulfurization activity. Finally, a possible reaction mechanism was proposed according to the results of XPS, ESR and GC–MS analysis.
研究领域:
化学工程
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Xin-Yang Yue,Xun-Lu Li,Jing-Ke Meng,Xiao-Jing Wu,Yong-Ning Zhou
The development of “beyond lithium-ion” battery systems with high energy density are urgently required due to the increasing demand for electric vehicles and compact energy storage applications . Lithium Sulfur batteries are considered as the most promising candidate owing to their high energy and low cost. However, shuttle effect of lithium polysulfide between the cathode and anode is one of the vital obstacles limiting their commercial application. Here, we design and fabricate a multi-functional interlayer by padding the molybdenum net with graphite or graphite/molybdenum trioxide composite that is able to adsorb polysulfide effectively thus alleviate the diffusion of polysulfide. The weak molybdenum-oxygen bonds on the surface of molybdenum trioxide nanoparticles provide efficient adsorption site to capture polysulfide. In addition, part of molybdenum trioxide can have lithium-ion intercalated to form lithium molybdenum trioxide, which contributes extra reversible capacity for the lithium-sulfur battery. molybdenum net ensures high electron conductivity and mechanical flexibility to facilitate charge transfer and endure inner stress. Coupling these advantages together, the lithium-sulfur cells with the multi-functional interlayer achieve a reversible capacity of 816 mAh g −1 after 500 cycles with the capacity retention of 95%.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Sheng Yan,Jun Wu,Yang Dai,Zhijie Pan,Weiqin Sheng,Junming Xu,Kaixin Song
In order to avoid more release of polysulfides into electrolyte, a biomass porous carbon (PC) derived from nodus nelumbinis rhizomatis (NNR) and a network of nickel nitrate hydroxide (Ni 3 (NO 3 ) 2 (OH) 4 , NNH) were firstly utilized as a composite cathode for lithium-sulfur (Li-S) batteries. The NNH/PC/S composite prepared by a mesh-like NNH layer coating in situ on the surface of porous carbon/sulfur composite exhibits an excellent electrochemical performance. The discharge specific capacity is up to 1203.5 mA h g −1 for the initial cycle at 0. 5 C and maintains 521.3 mA h g −1 after 700 cycles. As the current rate is as high as 5 C, the battery with NNH/PC/S cathode still guarantees a sufficient output in specific capacity of 583.9 mA h g −1 . Besides the better conductivity and the accommodation for sulfur from the NNR-derived porous carbon, the coating of the mesh-like NNH layer also plays a critical role in improving the cycling properties by providing a strong adsorption by Ni-S bond and more active sites for redox reactions, and thus suppressing the dissolution of polysulfides .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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