DIAMOND AND RELATED MATERIALS
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2023
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IF 4.1
Shuanghui Zeng,Xue Wang,Yunqian Zhang,Jiaojing Shao,Zhao Ding,Jie Zhao
A free-standing 3D core/shell composite material CNTs@Co 9 S 8 on nickel mesh has been prepared by a simple two-step method. Carbon nanotubes (CNTs) grown vertically on the surface of nickel mesh by chemical vapor deposition (CVD) method act as conductive skeleton. Then Co 9 S 8 nanosheets uniformly aligned on the surface of the CNTs by solvothermal method are interconnected to form a honeycomb structure . Owing to the close contact of the CNTs@Co 9 S 8 hybrid with the nickel mesh and the hierarchical 3D porous structure , the prepared Ni@CNTs@Co 9 S 8 electrodes exhibit low resistance and excellent charge storage capability with a specific capacitance of 1305.4 F g −1 at 1 A g −1 . The composite delivers an excellent rate capability with 84.3 % capacitance retention at 10 A g −1 . An asymmetric supercapacitor composed of Ni@CNTs@Co 9 S 8 and nitrogen-doped carbon nanotubes (NCNTs) shows an energy density of 23.8 Wh kg −1 and a high power density of 8007.4 W kg −1 . The specific capacitance of the ASC device remained 87.31 % after 10,000 charge-discharge cycles and two tandem ASCs can power two red LED diodes for at least 7 min, suggesting the potential application of the obtained free-standing electrode for supercapacitors .
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DOI
高影响因子
Energy Material Advances
·
2025
·
IF 15.9
Yue Peng,Pengfei Bi,Xu Zhu,Peitao Liu,Meijing Ren,Yanqing Zu,Xiaodong Li,Ailing Feng
The slow kinetics of oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) pose important challenges to energy storage. Defect engineering offers an effective strategy to enhance the performance of electrocatalytic materials. In this study, we synthesized trifunctional catalysts (CoO X /Co 9 S 8 @NC) derived from cobalt-based metal–organic frameworks modified with oxygen-sulfur double vacancies. These vacancies improve catalytic activity by increasing active sites and enhancing charge-transfer capacity. The CoO X /Co 9 S 8 @NC catalyst demonstrates outstanding ORR and OER bifunctional activity (Δ E = 0.63 V) and HER performance comparable to noble metal catalysts. Liquid zinc-air batteries exhibited superior cycling stability (2,520 cycles at 2 mA/cm 2 ). This defect engineering strategy presents a novel pathway for developing high-performance electrocatalysts and holds important potential for energy-conversion technologies.
研究领域:
材料科学
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电化学
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能量存储与转换
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纳米复合材料
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催化
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高影响因子
Nanoscale
·
2017
·Vol. 10
·期 5
·2649-2657
·
IF 7.367
Yang Li,Wei Zhou,Juncai Dong,Yun Luo,Pengfei An,Juan Liu,Xin Wu,Guilan Xu,Huabin Zhang,Jian Zhang
Interface modification is an effective and promising route for developing functional electrocatalysts. However, researchers have not created a reliable method to optimize the interfaces of components existing in electrocatalysts, although it is very crucial for the technological development of high-performance electrodes. Here, we develop a strategy aiming at the in situ anchorage of Co9S8 nanoparticles into a nitrogen (N), sulfur (S) co-implanted three-dimensional carbon matrix (Co9S8@NSCM) as a highly active and durable nonprecious metal electrocatalyst for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline medium. This strategy offers an opportunity to optimize the interface interaction and affords high activity for the ORR and OER in terms of low overpotentials and high current intensities. In addition, by confining Co9S8 nanoparticles into a N,S-doped carbon matrix, corrosion and aggregation can be effectively prevented, and thus the catalyst exhibits nearly unfading ORR catalytic performance after 100 000 s testing, a low discharge–charge voltage gap (0.81 V) and a long cycle life (up to 840 cycles) in Zn–air batteries. The present work highlights potentially powerful interface engineering for designing multi-component heterostructures with advanced performances in oxygen electrochemistry and related energy conversion.
研究领域:
材料科学
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电化学
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能量存储与转换
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纳米技术
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催化
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Shunchao Wang,Xin Pang,Dequan Huang,Man Zhang,Sijiang Hu,Youguo Huang,Fenghua Zheng,Hongqiang Wang,Qingyu Li,Qichang Pan
Cobalt sulfide (Co 9 S 8 ) is a promising anode material for sodium-ion batteries (SIBs) due to its high theoretical capacity, cost-effectiveness, and environmental friendliness. Unfortunately, the inevitable structural deterioration induced by the huge volume changes during the discharge/charge cycles leads to poor cycle performance and rate capability when evaluated as the anode material for SIB. Herein, we designed a Co 9 S 8 @C-MoS 2 heterostructure with abundant heterointerface and hollow structure. In the designed hybrid architecture, the self-supporting hollow carbon scaffold can provide sufficient space for volume expansion caused by Na + insertion, and the abundant heterointerface can accelerate ion-diffusion and electron transfer kinetics and dissipate the internal stress induced by volume expansion during the sodiation/desodiation process. As expected, the Co 9 S 8 @C-MoS 2 composite shows excellent sodium storage performance. Specifically, the Co 9 S 8 @C-MoS 2 composite displays excellent long-term cycling life (a high capacity of 429.4 mAh g −1 is maintained after 1500 cycles at 5.0 A/g), and superior rate performance (412.6 mAh g −1 is achieved even at 10.0 A/g).
研究领域:
材料科学
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能源存储
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Qihao Wu,Heju Gao,Jiahui Jiang,Ting Zhao,Shuai Liu,Chunyan Wu,Guancheng Xu,Li Zhang
A flexible air electrode with excellent activity and stability is essential for flexible zinc-air batteries. In this study, we report the rational design of nitrogen-doped carbon nanotube-encapsulated Co 9 S 8 nanoparticles on carbon cloth (Co 9 S 8 /NCNTs/CC), serving as self-supporting air electrodes for both liquid-state and flexible zinc-air batteries. The Co 9 S 8 /NCNTs/CC-1 exhibited a half-wave potential of 0.86 V for oxygen reduction reaction (ORR) and achieved a current density of 10 mA cm −2 for oxygen evolution reaction (OER) at a voltage of only 1.52 V. The well-constructed nanotube on carbon cloth facilitates mass diffusion and electron transfer, while enhancing the mechanical flexibility of the material. Density functional theory (DFT) calculations suggested that the synergistic interaction between Co 9 S 8 and NCNTs effectively enhanced the bifunctional electrocatalytic performance of the material. Liquid-state and flexible zinc-air batteries assembled with Co 9 S 8 /NCNTs/CC-1 demonstrated outstanding charge-discharge capabilities and long-term stability.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2020
·
IF 5.289
Chengli Yao,Jianglin Xu,Anjian Xie,Yuhua Shen
Nowadays, developing new anode material for lithium-ion batteries (LIBs) with distinguished electrochemical properties is still very significant and a huge challenge. Herein, a nanocomposite containing Co 9 S 8 /carbon (C)/nickel foam (NF) was synthesized. In the preparation process, ZIF-67 as the source of both Co 2+ and carbon was designedly grown in situ on the surface of NF with loose porous skeleton through the hydrothermal reaction. After sulfurization and pyrolysis of ZIF-67/NF, the porous flower-like Co 9 S 8 /C/NF composites formed. As a binder-free anode, Co 9 S 8 /C/NF exhibited excellent lithium storage performance, which showed a superior initial discharge capacity of 1926 mA h g −1 and reversible capacity of 1114 mA h g −1 after 200 cycles at 0.2 A g −1 . Even at 2 A g −1 current density, it could maintain a capacity of 578 mA h g −1 . The above outstanding electrochemical performances may be due to the following reasons. The loose flower-like structure assembled by lots of nanosheets, can provide a larger surface area for the transport and storage of Li + ions. With the cooperation of carbon matrix, the volume expansion of anodes can be effectively alleviated during charge and discharge process. At the same time, metal nickel foam as the current collector of the negative electrode also can increase the conductivity; promote the transport and diffusion of electrons. The loose skeleton enables the full contact of the active material with the electrolyte, which is beneficial to the transportation of Li + ions and electronics. This work provides an inspiration for designing and fabricating anode materials with distinguished-performance for LIBs.
研究领域:
材料科学
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能源存储与转换
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2020
·
IF 4.794
Xuan Wei,Hongyue Wu,Linlin Li
Obtaining high-capacity electrode materials is a key problem to be solved for high performance supercapacitors. Metal-organic frameworks derivatives have been considered to be ideal electrodes due to their large specific surface area and pore connectivity. Herein, we design a novel controllable structure, in which MnCo 2 S 4 nanorods with one-dimensional structure are inserted into three-dimensional ZIF-67 derived Co 9 S 8 hollow polyhedrons, the ratio between the two substances can be effectively regulated by controlling the reaction time. Among them, MC-3 sample shows the best performance and its capacity can reach up to 1058.0 F g −1 (146.9 mA h g −1 ) at 1 A g −1 . A supercapacitor constructed by MC-3 as the positive electrode, using activated carbon as the negative electrode, the assembled device shows a high energy density of 35.8 W h kg −1 at 750 W kg −1 . Besides, the supercapacitor also shows a steady cycling capacity of 82.1% retention after 6000 cycles. The excellent performance of the hybrid supercapacitor could envision promising applications in future high-performance energy storage devices.
研究领域:
材料科学
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能源存储与转换
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DOI
高影响因子
Batteries-Basel
·
2023
·Vol. 9
·期 1
·46
·
IF 4
Yingping Bu,Yawen Zhang,Yingying Liu,Simin Li,Yanlin Zhou,Xuefen Lin,Zicong Dong,Renchun Zhang,Jingchao Zhang,Daojun Zhang
Effective and inexpensive electrocatalysts are significant to improve the performance of oxygen evolution reaction. Facing the bottleneck of slow kinetics of oxygen evolution reaction, it is highly desirable to design the electrocatalyst with high activity, good conductivity, and satisfactory stability. In this work, nickel foam supported hierarchical Co9S8–Ni3S2composite hollow microspheres were derived from in situ-generative MOF precursors and the subsequent sulfurization process by a simple two-step solvothermal method. The composite microspheres were directly grown on nickel foam without any binder, and nickel foam was used as the nickel source and support material. The morphology and constitution of the series self-supported electrodes were characterized by SEM, TEM, XRD, XPS, and Raman, respectively. The unique porous architecture enriched the electrode with sufficient active surface and helped to reactants and bubble evolved during electrochemical water oxidation. Through tuning the concentration of cobalt source and ligand, the content ratio of Co9S8and Ni3S2can be modulated. The heterostructures not only afford active interfaces between the phases but also allow electronic transfer between Co9S8and Ni3S2. The optimized Co9S8-Ni3S2/NF-0.6 electrode with the highest electrochemical surface area and conductivity shows the best OER performance among the series electrodes in 1 M KOH solution. The overpotential of Co9S8-Ni3S2/NF-0.6 is only 233 mV when the current density is 10 mA cm−2, and corresponding Tafel slope is 116.75 mV dec−1. In addition, the current density of Co9S8-Ni3S2/NF-0.6 electrocatalyst hardly decreased during the 12 h stability measurement. Our approach in this work may provide the future rational design and synthesis of satisfactory OER electrocatalysts.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Tao Yu,Yiting Che,Hao Fu,Dingfeng Ma,Wenjia Zhao,Shitan Yan,Ting Bian,Liuting Zhang
The innovative design of highly active and noble-metal-free electrocatalysts for the oxygen reduction reaction (ORR) is urgently required for the widespread application of Zinc-air batteries (ZABs). This study presents a porous composite, Co 9 S 8 @NSC, which integrates N and S co-doped carbon aerogels with Co 9 S 8 nanoparticles to create ideal ORR electrocatalysts. The porous carbon aerogels posesess a high specific surface area, which offers abundant catalytic sites and efficient channels for the reactants and electrolytes, while maintaining a uniform distribution of nanoparticles during long-term operation. The collaboration of ORR-active Co 9 S 8 nanoparticles and N and S co-doped carbon aerogels significantly improves ORR performance. Co 9 S 8 @NSC demonstrates a competitive ORR activity, including a high half-wave potential (E 1/2 , 0.85 V), fast electron transfer kinetics (Tafel slop, 53.3 mV dec −1 ), and prominent long-term stability. When utilized as an air cathode catalyst in primary Zn-air batteries, the Co 9 S 8 @NSC electrode displays a power density of 150.9 mW cm −2 and a specific capacity of 735 mAh g zn −1 . Overall, this work presents a promising electrocatalyst design for ORR, which could greatly benefit the development of ZABs.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 5
·3227-3236
·
IF 7.79
Yinqing Sun,Yi Guan,Xiaochao Wu,Wanqing Li,Yongliang Li,Lingna Sun,Hongwei Mi,Qianling Zhang,Chuanxin He,Xiangzhong Ren
The rational design and construction of the efficient and robust non-noble metal bifunctional oxygen electrocatalysts is of critical significance due to the attention given to reversible metal–air batteries. In this paper, we report novel two-dimensional “senbei”-like Co9S8/CeO2/Co-NC nitrogen-doped carbon nanosheets (Co9S8/CeO2/Co-NC) derived from a unique 2D Co/Ce bimetallic ZIF. The phase transition from 3D spherical Co-ZIF to 2D Co/Ce-ZIF was achieved through the introduction of Ce ions. Profiting from the successful construction of the unique Co9S8/CeO2 heterostructure and the synergetic effect of two components, the as-prepared Co9S8/CeO2/Co-NC exhibited excellent electro-performance in both the oxygen evolution reaction (Ej=10 = 1.60 V) and oxygen reduction reaction (E1/2 = 0.875 V). Furthermore, when used as a bifunctional air electrode for Zn-air batteries, Co9S8/CeO2/Co-NC reached a high peak power density of ≈164.24 mW cm−2 at a high current density of ≈351 mA cm−2 and displayed an outstanding cycling stability of more than 668 h at 5 mA cm−2. This research provides new guidelines for preparing hybrid materials from cobalt-based sulfide species and CeO2 for electrocatalysis and energy storage or other fields.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 8
·4150-4159
·
IF 2.302
Zheng Linjie,Sun Xiaohua,Chen Linlin,Bao Chao,Luo Weilong,Huang Niu,Sun Panpan,Sun Yihua,Fang Liang,Wang Lei
Cobalt sulfide counter electrodes for the dye-sensitized solar cell (DSSC) were successfully prepared on fluorine-doped tin oxide (FTO) glass substrates by a facial one-step in situ solvothermal method. The influences of prepared temperature on the synthesized phase, surface morphology, electrocatalytic, and photovoltaic performances of the cobalt sulfide counter electrodes were investigated with X-ray diffraction (XRD), field-emission scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Tafel, and photocurrent density–voltage ( J – V ) measurements. The results indicated that very thin Co 9 S 8 nanoparticle thin films grew on the FTO substrates and the Co 9 S 8 counter electrode prepared at 180 °C showed superior electrocatalytic activity, chemical stability, and photovoltaic performance. The DSSC based on the Co 9 S 8 counter electrode prepared at 180 °C exhibited an efficiency of 6.59 % which was comparable to the solar cell based on the sputtering Pt counter electrode (6.82 %). It indicated that Co 9 S 8 in situ growing on FTO glass substrate at 180 °C is a potential candidate to replace Pt as a low-cost and efficient counter electrode of DSSC.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xiaoli Peng,Pengfei Wan,Long Yuan,Shilan Li,Shengdong Jing,Fuyu Xiao,Lingxing Zeng,Yaozhu Tian,Zhu Luo,Haosen Fan
The slow redox kinetics and shuttle effect of polysulfides are primary challenges that hinder the further application of lithium-sulfur batteries (LSBs) due to the poor conductivity of sulfur and low sulfur utilization. Separator modification through synergistic capture-catalysis-conversion of polysulfides proves to be an effective approach to address these challenges. In this paper, we successfully design and prepare double shell core-shell Co@Co 9 S 8 @NSC nanocrystals encapsulated in sulfur- and nitrogen-co-doped carbon nanotubes (Co@Co 9 S 8 @NSC) as a separator modifier for LSBs. The modified layer (Co@Co 9 S 8 @NSC//PP) exhibits excellent adsorption-catalytic properties, effectively immobilizing soluble lithium polysulfides (LiPSs) and promoting their electrochemical conversion, thereby enhancing lithium ion (Li + ) transport and facilitating a homogeneous lithium deposition process. When we utilize the Co@Co 9 S 8 core-shell structure to coat the polypropylene (PP) separator, the results demonstrate that the modified separator achieves a high reversible capacity of 591 mAh g −1 after 500 cycles at 1 C and reaches a reversible capacity of 442 mAh g −1 after 1000 cycles at 2 C, accompanied by a low capacity decay rate of only 0.05 % per cycle. The Li/Li symmetric batteries, which have Co@Co 9 S 8 @NSC-coated separators, exhibit long lifetimes exceeding 800 h at current densities of 2 mA cm −2 and 2 mAh cm −2 , along with a low voltage hysteresis of approximately 55 mV. This provides enhanced lithium stripping/plating stability compared to Li/Li symmetric batteries with pure PP separators. This study presents a novel approach to interlayer construction to achieve high sulfur utilization in long-life LSBs by accelerating the redox kinetics of LiPS and mitigating the shuttle effect.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）