ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaoqin Liu,Yu Xiang,Qingping Li,Qiaoji Zheng,Na Jiang,Yu Huo,Dunmin Lin
Bimetallic sulfides are considered as one of the most promising anode materials for sodium ion batteries (SIBs) due to their high conductivity and electrochemical activity. However, they still suffer from challenges such as large volume changes, low initial coulombic efficiency and poor cycling performance. Herein, we synthesize SnS 2 -CoS 2 @C (SCS@C) core-shell nanocubes with abundant mesopores through simple carbon coating and sulfidation strategies using polymeric resorcinol-formaldehyde as carbon source. The porous nanostructure of SCS@C is conducive to shortening the transport path of sodium ions and facilitating the infiltration of electrolyte, while the carbon shell can buffer volume expansion stress during charging and discharging processes. As a result, the SCS@C electrode exhibits an excellent sodium storage: an outstanding initial coulomb efficiency of 92.8%, remarkable cycling performance of 662 mAh g −1 at 100 mA g −1 after 70 cycles with extremely low capacity decay of 0.00013% per cycle, and long cycle durability of 402.5 mAh g −1 at 5 A g −1 over 500 cycles. Our study provides a viable strategy for the rational design of bimetallic sulfides anode materials with high efficiency and long term stability for sodium storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Miaomiao Ye,Wen Jin,Xingyuan Wang,Yueqian Yan,Xiaohong Zhou,Ziyi Luo,Tuqiao Zhang,Xiaowei Liu
Activation of peroxymonosulfate by heterogeneous catalyst is an efficient process for organic pollutants removal. However, it is difficult for solid-liquid separation of the heterogeneous catalysts in slurry-like batch reaction. In this work, CoS 2 particles were deposited onto an air-laid cloth (denoted as CoS 2 -ALC) and were used as a catalyst for activation of peroxymonosulfate (PMS). Unlike traditional slurry-like batch reaction forms, a shallow continuous flow reactor was designed for the installation of a CoS 2 -ALC, thereby improving the activation efficiency of persulfate and rapid solid-liquid separation. The degradation kinetics constant for carbamazepine (CBZ) by the CoS 2 -ALC/PMS process was 0.0748 min −1 , which is 374, 150, 150 times higher than that the CoS 2 -ALC adsorption process, PMS/ALC oxidation process and PMS alone process, respectively. The significantly enhanced degradation efficiency was due to the S in CoS 2 promoting the cycling of Co 2+ /Co 3+ , thereby enhancing the generation of free radical. Parameters such as CoS 2 deposition amount, PMS concentration, water flow rate, water flow height, water flow direction, solution pH, humic acid and anions that affecting the degradation efficiencies were studied. In addition, the degradation by-products of CBZ as well as their toxicity were detected, and a possible degradation pathway were proposed. Finally, expanded outdoor experiments and cycling experiment demonstrated that the CoS 2 -ALC/PMS process is potentially useful in practical settings of wastewater treatment .
研究领域:
环境科学
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废水处理
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2021
·Vol. 8
·期 16
·2101019
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IF 16.806
Jun Xu,Likun Yang,Shoufu Cao,Jingwen Wang,Yuanming Ma,Junjun Zhang,Xiaoqing Lu
Structural design of advanced cathodes is a promising strategy to suppress the shuttle effect for lithium-sulfur batteries (LSBs). In this work, the carbon cloth covered with CoS 2 nanoparticles (CC-CoS 2 ) is prepared to function as both three-dimensional (3D) current collector and physicochemical barrier to retard migration of soluble lithium polysulfides. On the one hand, the CC-CoS 2 film works as a robust 3D current collector and host with high conductivity, high sulfur loading, and high capability of capturing polysulfides. On the other hand, the 3D porous CC-CoS 2 film serves as a multifunctional interlayer that exhibits efficient physical blocking, strong chemisorption, and fast catalytic redox reaction kinetics toward soluble polysulfides. Consequently, the Al@S/AB@CC-CoS 2 cell with a sulfur loading of 1.2 mg cm −2 exhibits a high rate capability (≈823 mAh g −1 at 4 C) and delivers excellent capacity retention (a decay of ≈0.021% per cycle for 1000 cycles at 4 C). Moreover, the sandwiched cathode of CC-CoS 2 @S/AB@CC-CoS 2 is designed for high sulfur loading LSBs. The CC-CoS 2 @S/AB@CC-CoS 2 cells with sulfur loadings of 4.2 and 6.1 mg cm −2 deliver high reversible capacities of 1106 and 885 mAh g −1 , respectively, after 100 cycles at 0.2 C. The outstanding electrochemical performance is attributed to the sandwiched structure with active catalytic component.
研究领域:
材料科学
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储能技术
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电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemCatChem
·
2017
·Vol. 10
·期 4
·796-803
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IF 4.803
Shi Feng,Xingyue Li,Jia Huo,Qiling Li,Chao Xie,Tingting Liu,Zhigang Liu,Zhenjun Wu,Shuangyin Wang
Graphical Porous carbon electrode : CoS 2 @N/S-codoped porous carbon is prepared through an electrodeposition–ZIF conversion–sulfuration strategy. The loading of active sites can be controlled easily by varying the electrodeposition time. The resulting material can be employed directly as a working electrode for the hydrogen evolution reaction and shows an excellent catalytic activity and stability. A convenient, controllable method to fabricate an electrode is necessary to achieve the practical application of a hydrogen evolution reaction (HER) catalyst. In this work, an electrodeposition–ZIF conversion–sulfuration strategy is developed to produce a CoS 2 @N/S-codoped porous carbon (CoS 2 @NSC/CFP) to drive the HER efficiently. CoS 2 @NSC/CFP was prepared by the electrodeposition of Co(OH) 2 on a carbon fiber paper followed by conversion into ZIF-67 and subsequent sulfuration with sulfur. The loading of electroactive components can be controlled easily in the range of 0.7–10.0 mg cm −2 by varying electrodeposition time from 5 min to 2 h. The resulting material can be employed directly as a working electrode for the HER and it shows an excellent catalytic activity and stability with an overpotential of 95 mV at 10 mA cm −2 and 158 mV to reach 100 mA cm −2 in an acidic medium. The high efficiency is related intimately to the high dispersion of ultra-small CoS 2 nanoparticles, heteroatom-codoping, and the 3 D porous network configuration of the carbon fiber paper.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
·
IF 3.133
Kongyan Xie,Li Li,Xiang Deng,Wei Zhou,Zongping Shao
Sodium-ion batteries (SIBs) are highly attractive electrochemical devices for massive energy storage because of their low cost and abundance of sodium , but insufficient anode performance remains a key challenge for the commercialization of this attractive technology. In this study, a hierarchically porous CoS 2 /graphene composite with an architecture of CoS 2 nanoparticles embedded in reduced graphene oxide (rGO) is synthesized through a one-step hydrothermal route allowing the growth of the CoS 2 phase and the reduction of the graphene oxide simultaneously. This composite is applied as an anode material for SIBs, delivering favorable performance. The CoS 2 phase consists of nanoparticles of ∼10 nm that are uniformly anchored on the rGO, forming a CoS 2 /rGO hybrid with strong phase interaction. As a conversion-type anode for SIBs, the electrochemical testing results show significantly enhanced sodium-storage properties for the CoS 2 /rGO composite compared with that of bare CoS 2 . Impressively, the CoS 2 /rGO nanostructure exhibits a high discharge capacity of approximately 400 mAh g −1 after 100 cycles at specific current of 100 mA g −1 , corresponding to approximately 80% of the discharge capacity in the second cycle. Such improvement may be due to the two-dimensional conductive network, homogeneous dispersion and immobilization of the CoS 2 nanoparticles, as well as the enhanced wettability of the active material in the electrolyte by introducing rGO. The results suggest that this well-designed conversion-type CoS 2 is a promising anode material for high-performance SIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 36
·15652-15663
·
IF 2.5
Wei Dong,Zhaomeng Wu,Xiaochen Xu,Su Li,Yang Ji
Lithium–sulfur (Li–S) batteries are regarded as one of the best choices for next-generation batteries due to their high energy density and low cost. However, there are three major challenges, namely the low electrical conductivity of sulfur and its products, the volume change during the electrochemical process, and the “shuttle effect” of lithium polysulfide. Carbon materials can alleviate the problems of electrical conductivity and volume change of sulfur. The shuttle of polysulfides can be further inhibited by doping heteroatoms or loading polar compounds. In this work, CoS2/porous boron–nitrogen co-doped carbon (CoS2/BNC) was prepared using a boron–nitrogen co-doped porous carbon precursor. The hollow structure can better adapt to the volume expansion during the sulfur reaction, and the chemisorption and redox kinetics of LiPSs are strengthened from multiple angles to inhibit the shuttle of LiPSs. The CoS2/BNC/S lithium–sulfur battery has a high initial discharge capacity of 1639.1 mAh g−1 under the condition of 0.1C. After 500 cycles at a current density of 2C, the capacity still remains at 752.7 mAh g−1, with a capacity decay of only 0.048% per cycle, and the coulombic efficiency can still be maintained at 97.8%, showing satisfactory electrochemical performance.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 4
·2988-3001
·
IF 11.806
Zhao Xiaoyu,Zhang Yingbing,Hou Yongdan,Zhao Zijian,Gong Yaxin,Wang Yanfei,Wei Huige,Pol Vilas G.
A beneficial strategy for enhancing the electronic conductivity of transition metal chalcogenides (TMCs) as lithium-ion battery anode material is through shortening the charge transfer path between the sulfide particles. However, the combination between the carbon-based matrix and electroactive materials is sometimes weak, which hinders the cycling stability. In this paper, the Ti-based MXene, T 3 C 2 T x , was used as a conductive frame, combined with the ZIF-67-based CoS 2 /C grains yielding Ti 3 C 2 T x /CoS 2 /C composite electrode through one-step and two-step synthesis methods, which displayed significantly enhanced capacity, rate performancem, and cycling stability. The compsoite reached a capacity retention of 82.6% after 100 cycles with a significantly higher capacity of 1020.5 mAh/g at 0.2 A/g current density. After 100 discharge–charge cycles, the Ti 3 C 2 T x /CoS 2 /C composite revealed a low volume expansion of 9.5%, suggesting superior structural integrity and stability with the synergistic effect of both MXene 2D and CoS 2 /C 3D nanostructures. Graphical abstract
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Yashan Huo,Lei Zhang,Yujia Tan,Yang Liu,Mingjuan Wang,Minshan Zhao,Siyuan Huo,Peng Gao,Qi Jin,Zhihui He
Designing lightweight microwave absorbers that simultaneously achieve strong attenuation and broad bandwidth remains a major challenge. Here, we report a multidimensional CoS 2 /C/MXene heterostructure constructed through electrospinning and in-situ sulfidation, which integrates 0D CoS 2 nanoparticles, 2D MXene nanosheets, and a 1D conductive carbon-fiber network. This architecture generates abundant heterogeneous interfaces and continuous electron pathways, enabling synergistic magnetic-dielectric coupling and optimized impedance matching. The resulting composite achieves a minimum reflection loss of ‒70.86 dB at 10.6 GHz and an effective absorption bandwidth of 4.64 GHz at a low filler loading of 3 wt%. DFT calculations reveal significant interfacial charge transfer and built-in electric field formation, corroborating the enhanced polarization and conduction losses. Moreover, the composite exhibits excellent thermal stability, corrosion resistance, and mechanical flexibility. This work demonstrates an efficient strategy for constructing high-performance, low-density microwave absorbers through multidimensional heterostructure engineering.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wen Ren,Hao Wang,Yalong Jiang,Jun Dong,Daping He,Qinyou An
Flexible electrodes based on conversion-type materials have potential applications in low-cost and high-performance flexible sodium-ion batteries (FSIBs), owing to their high theoretical capacity and appropriate sodiation potential. However, they suffer from flexible electrodes with poor mechanical properties and sluggish reaction kinetics. In this study, freestanding CoS 2 nanoparticles coupled with graphene oxides and carbon nanotubes (CoS 2 /GO/CNTs) flexible films with robust and interconnected architectures were successfully synthesized. CoS 2 /GO/CNTs flexible film displays high electronic conductivity and superior mechanical properties (average tensile strength of 21.27 MPa and average toughness of 393.18 KJ m −3 ) owing to the defect bridge for electron transfer and the formation of the π–π interactions between CNTs and GO. In addition, the close contact between the CoS 2 nanoparticles and carbon networks enabled by the Co-N chemical bond prevents the self-aggregation of the CoS 2 nanoparticles . As a result, the CoS 2 /GO/CNTs flexible film delivered superior rate capability (213.5 mAh g −1 at 6 A g −1 , better than most reported flexible anode) and long-term cycling stability. Moreover, the conversion reaction that occurred in the CoS 2 /GO/CNTs flexible film exhibited pseudocapacitive behavior. This study provides meaningful insights into the development of flexible electrodes with superior mechanical properties and electrochemical performance for energy storage.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Peng Yang,Xicheng Zhang,Chenguang Zhang,Shiping Ma,Xiaowei Yang,Yanli Xiong,Yong Xie,Yong Cao,Yanhua Cui,Xiaojiang Liu,Xinlu Li
As the most investigated cathode of thermal batteries , the electrochemical performance of CoS 2 is limited by a big polarization at high current density and low working temperature, which is ascribed to the poor wettability of molten salt on CoS 2 surface and low exchange current density . In this contribution, Al 2 O 3 is selected as a modifier to improve the wettability of molten salt on CoS 2 surface and exchange current density at the same time, by adjusting the dielectric polarization field of CoS 2 surface. The discharge capacity (V ≥ 1.7 V) of CoS 2 increases by ~11% at 500 °C with a discharge current of 300 mA cm −2 , and 55% at 450 °C with a discharge current of 100 mA cm −2 , by the decoration of Al 2 O 3 nanoparticles . Moreover, the influence of decorated Al 2 O 3 nanoparticles on the electrochemical performance of CoS 2 are discussed.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Tianli Zhang,Mengrong Wu,Hui Gu,Haiwei Yu,Ming Zhou,Xingmei Guo,Yuanjun Liu,Xiangjun Zheng,Qinghong Kong,Junhao Zhang
To address the challenges associated with significant volume expansion and limited electronic conductivity of transition metal sulfides (TMSs) as anode materials in lithium-ion batteries. Nitrogen doped carbon (NC) and carbon nanotubes (CNTs) modified CoS 2 /NiS 2 (Co-Ni-S/NC/CNTs) composites were prepared by a simple chemical precipitation method and sulfurization reaction. Co-Ni-S/NC/CNTs composites have special structure, utilizing NC as carrier and CNTs as cladding layer . When evaluated as anode materials for lithium-ion batteries, the initial discharge specific capacity of Co-Ni-S/NC/CNTs anode delivers 1518.8 mAh g −1 at 0.1 A g −1 , and a high reversible capacity of 1137 mAh g −1 is kept after 100 cycles, which is higher than the discharge specific capacity (1117.1 mAh g −1 ) of the second cycle. At a current density of 0.5 A g −1 , a capacity of 468 mAh g −1 is maintained after 300 cycles. The excellent cycling stability of the CoS 2 /NiS 2 anode can be primarily attributed to that CNTs layer can enhance the conductivity of CoS 2 /NiS 2 , and the incorporation of NC can effectively improve the infiltration of electrolytes. Meanwhile, the synergistic action of CNTs and NC can mitigate the volume expansion during charging and discharging processes.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lixiang Zhang,Luping Feng,Xiao Zhuang,Peisong Tang,Guofu Chen,Hua Wang
A visible-light-responsive photoelectrochemical (PEC) sensor was proposed for the sensitive and selective analysis of chlorpyrifos (CPF) by synergistically using CoS 2 quantum dots (QDs) and CdS nanowires (NWs). The CdS NWs were first prepared by the solvothermal method and subsequently combined with CoS 2 QDs to produce CoS 2 /CdS product with 0D/1D heterostructure. It turned out that the so-obtained nanocomposites with 0D/1D heterostructure could greatly suppress the recombination of photoinduced electrons and holes, and the electrode modified with this composite could exhibit preferable PEC performance and photocurrent signal compared to the one with CdS or CoS 2 . After the addition of CPF, the photocurrent signal of the proposed PEC sensor was found to be selectively decreased because of the specific chelation between the cobalt sites of CoS 2 /CdS and the sulfur, nitrogen-atoms of CPF, which might block the electrons transferring process. The proposed PEC sensor could detect CPF in concentrations that linearly span from 0.030 to 100 ppb with an ideal detection limit of 0.010 ppb, which performances are much better than those of currently used analytical methods. Furthermore, this work may establish a framework for the development of various PEC sensing platforms with 0D/1D heterostructure for the quantitative assay of environmental pollutants like CPF.
研究领域:
环境科学
·
分析化学
✓ 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）