ADVANCED MATERIALS
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2019
·Vol. 31
·期 25
·1900901
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IF 25.809
Huifang Ma,Zhong Wan,Jia Li,Ruixia Wu,Zhengwei Zhang,Bo Li,Bei Zhao,Qi Qian,Yuan Liu,Qinglin Xia,Guanghua Guo,Xidong Duan,Xiangfeng Duan
Multiple structural phases in transition metal dichalcogenides have attracted considerable recent interest for their tunable chemical and electronic properties. Herein, a chemical vapor deposition route to ultrathin CoSe nanoplates with tunable structure phases is reported. By precisely tailoring the growth temperature, ultrathin 2D layered tetragonal CoSe nanoplates and nonlayered hexagonal CoSe nanoplates can be selectively prepared as square or hexagonal geometries, with thickness as thin as 2.3 and 3.7 nm, respectively. X-ray diffraction, transmission electron microscopy, and selected area electron diffraction studies show that both types of nanoplates are high-quality single crystals. Electrical transport studies reveal that both the tetragonal and hexagonal CoSe nanoplates show strong thickness-tunable electrical properties and excellent breakdown current density. The 2D hexagonal CoSe nanoplates display metallic behavior with an excellent conductivity up to 6.6 × 10 5 S m −1 and an extraordinary breakdown current density up to 3.9 × 10 7 A cm −2 , while the square tetragonal nanoplates show considerably lower conductivity up to 8.2 × 10 4 S m −1 with angle-dependent magnetoresistance and weak antilocalization effect at lower field. This study offers a tunable material system for exploring multiphase 2D materials and their potential applications for electronic and magnetoelectronic devices.
研究领域:
材料科学
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纳米技术
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凝聚态物理
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电子器件
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磁电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoke Luo,Di Wang,Shiyi Liu,Hailong Yan,Jinbing Cheng,Yang Lu,Deyang Zhang,Huan Pang
The redox reactions occurring at positive electrode of the lithium-sulfur (Li-S) batteries involve several key electrocatalytic processes that significantly impact the overall performance of the electrochemical energy storage system. This study presents a heterogeneous catalytic composite material composed of CoSe quantum dots (QDs) integrated with Sn 3 O 4 nanosheets, which enhances the overall ionic conductivity and accessibility of active sites within the cathode. This controlled migration effectively traps polysulfides within the cathode, reducing their dissolution into the electrolyte and mitigating the shuttle effect. Li-S batteries incorporating CoSe QDs/Sn 3 O 4 porous carbon nanofibers (PCNFs) demonstrate a high discharge capacity of 1596.9 mAh g −1 at 0.1 C, along with remarkable cycling stability, achieving 1500 cycles at 2 C with a minimal capacity decay of 0.024 % per cycle. Even under a high sulfur loading conditions of 8.61 mg cm −2 and a low electrolyte to sulfur ratio of approximately 4.6 μL mg −1 , the CoSe QDs/Sn 3 O 4 PCNFs cathode delivers an initial discharge-specific capacity of 732.0 mAh g −1 at 0.2 C. Through this method, we accomplished the size control and uniform distribution of CoSe QDs, and this method can be extended to the synthesis of other metal oxide and metal sulfide QDs, offering a novel idea for the application of QDs in polysulfide catalysis.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Di Wang,Ya Yang,Shiyi Liu,Hailong Yan,Jinbing Cheng,Yang Lu,Yongsong Luo,Hui Ying Yang
Lithium-sulfur (Li–S) batteries face significant challenges, including capacity fading and restricted rate performance, primarily caused by the passivation of active materials, the polysulfide shuttle phenomenon, and sluggish redox reactions. To address these issues, a composite material comprising CoSe quantum dots (QDs)/NiO PCNFs (porous carbon nanofibers) has been designed and synthesized. This innovative design enhances the accessibility of active sites, which play a vital role in effectively anchoring and converting lithium polysulfides (LiPSs). The CoSe quantum dots (QDs) embedded in NiO porous carbon nanofibers (PCNFs) leveraged the synergistic interactions between their components to achieve exceptional cyclic stability, maintaining an ultra-low capacity decay rate of 0.034 % per cycle over 500 cycles at a current density of 2 C. The heterostructure and the built-in electric field (BIEF) work in concert to mitigate the polysulfide shuttle effect and promote faster electron and lithium-ion transport. This advanced architecture presents a promising strategy for enhancing the energy density and cycle lifespan of Li–S batteries, advancing their potential for practical implementation.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Muhammad Sana Ullah Shah,Xiaoqing Zuo,A. Shah,Sameerah I. Al-Saeedi,Muhammad Zia Ullah Shah,Eman A. Alabbad,Hongying Hou,Syed Awais Ahmad,Muhammad Arif,Muhammad Sajjad,Tauseef Ul Haq
This work proposed a facile synthesis of NiSe 2 -CoSe nanocomposite via an economical wet-chemical assisted method for the electrochemical energy storage domain, specifically for supercapacitor applications. The morphological, structural, and surface chemistry characterization guarantee the appropriate formation of the micro flower and nanoparticles-like morphology with high purity, crystallinity , and the existence of Ni, Co, and Se elements on the surface of the samples was verified by EDX examination. The comparative electrochemical properties reveal that the NiSe 2 -CoSe nanocomposite electrode yields an optimized performance than NiSe 2 and CoSe electrodes in an aqueous solution with improved capacitance and charge transport kinetics. The synergistic effect between metal selenide nanomaterials could effectively realize the excellent charge storage properties of the NiSe 2 -CoSe nanocomposite. Strikingly, a voltage runs to 1.7 V by assembling a hybrid supercapacitor of NiSe 2 -CoSe||AC||KOH in the two-electrode mode for utilization towards the practical aspect. More specifically, high stability of 89.6 % was sustained at 20 A/g for 20,000 cyclings with durable performance. Additionally, a high power of 8460 W/kg was achieved when the energy density progressively reached 54.9 Wh/kg. The use of chalcogenide is now the top priority for electrochemical energy conversion and storage , thanks to these encouraging results.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 8
·3702-3712
·
IF 9.6
Mu Zi-Jie,Gao Yan-Jun,Dong Wen-Shuai,Li Zong-You,Song Qing-Yi,Huang Han-Jiao,Xing Li-Dong,Zhang Jian-Guo,Wang Wei,Yu Qi-Yao
The highly reversible insertion/extraction of large-radius K + into electrode materials remains a tough goal, especially for conversion-type materials. Herein, we design a current collector-integrated electrode (N–CoSe/CoSe 2 –C@Cu) as an advanced anode for potassium-ion battery (PIBs). The conductive CoSe/CoSe 2 heterojunction with rich Se vacancy defects, conductive sp 2 N-doped carbon layer, and the elastic copper foil matrix can greatly accelerate the electron transfer and enhance the structural stability. Consequently, the well-designed N–CoSe/CoSe 2 –C@Cu current collector-integrated electrode displays enhanced potassium storage performance with regard to a high capacity (325.1 mAh·g −1 at 0.1 A·g −1 after 200 cycles), an exceptional rate capability (223.5 mAh·g −1 at 2000 mA·g −1 ), and an extraordinary long-term cycle stability (a capacity fading of only 0.019% per cycle over 1200 cycles at 2000 mA·g −1 ). Impressively, ex situ scanning electron microscopy (SEM) characterizations prove that the elastic structure of copper foil is merged into the cleverly designed N–CoSe/CoSe 2 –C@Cu heterostructure, which buffers the deformation of structure and volume and greatly promotes the cycle life during the potassium/depotassium process. Graphical abstract
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
Nanoscale
·
2021
·Vol. 13
·期 24
·10849-10861
·
IF 7.79
Shunyou Hu,Yuanyuan Hu,Xiangli Liu,Jiaheng Zhang
Lithium–sulfur (Li–S) batteries generally suffer from a serious “shuttle effect” during the charging/discharging process, resulting in the loss of active components and sluggish redox reaction kinetics that hinder the cycle life and rate performance of the battery. To address this, CoSe/C hollow structures (CoSe/C HSs) were prepared via a simple hydrothermal strategy and used as a sulfur host for Li–S batteries. The battery with CoSe/C HSs exhibited a high initial specific discharge capacity of 1405 mA h g−1 with a coulombic efficiency of 99.8% at 0.1C. Additionally, S@CoSe/C HS cathodes with a high sulfur loading of 5.1 mg cm−2 delivered a considerable specific discharge capacity of 1256.1 mA h g−1 and maintained a high capacity of 1120 mA h g−1 after 100 cycles with a capacity decay rate of 0.11% per cycle at 0.1C. The unique raspberry-like structure of CoSe/C HSs prevents polysulfides from escaping the cathode host via both physical containment and the formation of Co–S and Se–Li chemical bonds, and it also enhances the polysulfide redox kinetics. Furthermore, the peculiar raspberry-like structure can withstand volume changes during charging/discharging to better protect the cathode.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shenghua Hou,Fei Xie,Xuejie Wang,Liuyang Zhang,Xinming Nie,Jiaguo Yu,Tao Liu
Graphene-based metal selenides, are increasingly recognized for their potential in sodium-ion battery applications due to their superior electrochemical properties. The unique structure of graphene facilitates rapid in-plane transport of sodium ions, but the interlayer diffusion remains a significant challenge. The Ni 0.85 Se@CoSe heterojunctions, strategically grown adjacent to the graphene pores, offer a novel solution by creating in-plane holes that serve as direct channels for vertical ion transport, thereby enhancing cross-layer sodium ion permeation. The incorporation of Ni 0.85 Se@CoSe heterojunctions with holey graphene (NCS/HG) significantly enhances the reaction dynamics between sodium ions and anode material. These heterojunctions not only promote easier sodium ion insertion/extraction process by reducing the Na + adsorption energy, but also improve the electrical conductivity by adjusting the band gap. The configuration supports high current density applications (573.5 mAh/g at 5.0 A/g), and ensures robust cycle stability with a capacity retention rate of 97 % after 1000 cycles at 2.0 A/g. Therefore, the development and etching techniques employed in engineering the Ni 0.85 Se@CoSe/HG graphene-based anodes exemplify a significant advancement in anode material design, highlighting the importance of material architecture in the development of high-performance energy storage devices.
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
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jianhong Zhang,Junjie Yan,Zhikang Ao,Wei Li,Wei Wang,Yinong Lyu,Huifang Ma
The heterostructure moiré superlattice plays a crucial role in modulating electronic and optical properties through the formation of periodic potential patterns. However, the synthesis of ultrathin 2D heterostructures remains a significant challenge. In this work, ultrathin 2D CoSe/WSe 2 heterostructures were grown via a two-step vapor deposition route. The thickness of nonlayered hexagonal CoSe nanosheets was reduced to 1.7 nm through growth on a 0.79 nm thick WSe 2 nanosheet. Raman spectroscopy analyses indicate the formation of high-quality 2D CoSe/WSe 2 heterostructures. Selected area electron diffraction studies conclusively validate the high-quality single-crystal nature of CoSe and WSe 2 nanosheets within the resultant heterostructures. Scanning transmission electron microscopy studies show that the formed heterostructure exhibits a well-defined moiré superlattice with a periodicity of ∼ 3.96 nm. Additionally, the device based on CoSe/WSe 2 heterostructures with CoSe contacts demonstrates relatively higher on-state current and field-effect mobility compared to the WSe 2 device with Cr/Au contacts. The developed synthesis method for ultrathin CoSe/WSe 2 heterostructures provides a material platform for investigating their diverse properties.
研究领域:
材料科学
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纳米技术
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固体物理
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半导体器件
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Feng Zhang,Yu Lei,Jiali Liu,Guang Li,Yangcheng Xie,Lingguang Yi,Tianjing Wu,Xianyou Wang
The construction of suitable heterostructures in materials can tune the Fermi energy levels and electron transport rates of materials to achieve attractive oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) properties. In this study, a catalyst anchored in nitrogen-doped carbon nanowires (NCNW) with a heterogeneous interface of Co and CoSe is constructed to realize high-performance ORR and OER bifunctional catalysis. These Co and CoSe heterostructure interfaces can optimize the adsorption of intermediates. The Co/CoSe@NCNW catalyst performs excellent ORR catalytic activity (E 1/2 = 0.89 V), and good OER activity (potential at 10 mA/cm 2 , E j = 10 = 1.55 V). More importantly, the material shows excellent performance in rechargeable zinc-air batteries (ZABs). The open-circuit voltages of 1.47 and 1.50 V and the peak power densities of 122.56 and 74.49 mW/cm 2 in liquid and solid electrolytes, respectively, are superior to those of the ZABs prepared from noble metals. Consequently, the construction of heterogeneous structures can convincingly boost the commercialization of rechargeable ZABs, and be extended to other fields involving ORR and OER.
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
LANGMUIR
·
2025
·
IF 3.9
Lanlan Yang,Taoyi Shen,Xiang Chen,Zhongce Hu,Dan Ge,Rui Zhang,Kaifu Zhang,Houyong Yu
Developing a self-supported structure with an enriched active site is crucial for enhancing the water splitting performance of transition metal selenide electrocatalysts. Herein, we present a cobalt selenide/waste silk-derived carbon (CoSe/SC) hybrid catalyst synthesized through a synergistic alcohol-mediated solvothermal and controlled pyrolysis strategy. Notably, the incorporation of ethanol transforms silk from a random coil to a highly crystalline β-sheet conformation, which effectively preserves the hierarchical architecture during carbonization. The resulting self-supporting SC matrix demonstrates exceptional electrical conductivity, enabling optimal dispersion and electronic coupling of the CoSe nanoparticles. Electrochemical evaluations reveal the optimized CoSe/SC-2 catalyst achieves overpotentials of 254.4 mV and 278.7 mV to drive 10 mA cm–2 for the HER and the OER, respectively. Importantly, the formation of Se–C bonds endows a strong coupling between cobalt selenide and waste silk-derived carbon, leading to enhanced stability (130 h) of CoSe/SC-2 in overall water splitting. This work offers valuable insights for designing transition metal selenides supported on regenerated biomass to achieve efficient electrocatalytic water splitting.
研究领域:
材料科学
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电化学
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纳米技术
·
环境科学
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能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Hongbo Zhou,Dongxu Zhang,Weixuan Dong,Chunxing Zhou,Tianyao Jiang,Yashu Liu,Chungui Tian,Yanhong Liu,Yu Liu,Baodong Mao
The construction of high-efficiency bifunctional electrocatalysts is still a main challenge for hydrogen production from water splitting, in which comprehensive structure regulation plays a key role for synergistically boosting the intrinsic activity and charge collection. Here, we used a two-step hydrothermal method for construction of an interjaculated CoSe/Ni 3 Se 4 heterostructure from NiCo LDH nanosheets grown on stainless steel (SS) meshes as bifunctional electrocatalysts for overall water splitting. The SS meshes containing Fe and Ni act as an excellent 3D scaffold for catalyst growth and charge collection. The SS@CoSe/Ni 3 Se 4 composite exhibits outstanding electrocatalytic performances with low overpotentials of 97 mV for hydrogen evolution and 230 mV for oxygen evolution to reach a current density of 10 mA cm −2 , respectively. Moreover, by using SS@CoSe/Ni 3 Se 4 as both the cathode and anode , the assembled electrolyze only required 1.55 V to reach 10 mA cm −2 for overall water splitting. The outstanding performance of SS@CoSe/Ni 3 Se 4 benefits from the synergy between excellent charge collection capability of SS meshes and the abundant active sites at the CoSe/Ni 3 Se 4 heterointerface formed with the in-situ conversion of NiCo LDH nanosheets. Electrochemical active surface area and impedance spectrum indicate that the CoSe/Ni 3 Se 4 loaded on SS has the most abundant electrochemically active sites and the smallest electrochemical resistance, thereby exposing more active sites and enhancing the charge transfer to promote the catalytic activity . By integrating the delicate nanoscale heterostructure engineering with the microscale SS mesh scaffold, our work provides a new perspective for the preparation of high-performance and cheap electrocatalysts that are easy to be integrated with industrial applications.
研究领域:
材料科学
·
电化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yang Song,Caiyun Li,Jin Wang,Hongrui Yang,Hanwen He,Yukun Liu,Sen Zhang,Chao Deng
The explorations of efficient electrocatalysts to accelerate oxygen reactions in a wide temperature range is a crucial issue to the development of zinc-air batteries (ZAB) for all-climate applications. Herein, the Co-CoSe heterogeneous furry fibers (Co-CoSe@NHF) are developed as a bifunctional oxygen electrocatalyst for ZAB towards wide-temperature range applications. The Co-CoSe heterostructure with large work function difference (ΔW F ) endows interfacial electron redistribution, which builds strong interfacial built-in electric field (BIEF) and improves the oxygen reactions. Meanwhile, the Co-CoSe heterostructure is encapsulated by in-situ grown carbon nanotubes, and forms the hollow fiber (NHF) with furry surface and beads-on-string configuration. The highly porous and conductive NHF configuration facilitates the fast kinetics and favors to accommodates volume change during cycling. As a result, the Co-CoSe@NHF achieves the superior bifunctional properties and good reliability for oxygen reactions. Integrated with the Co-CoSe@NHF fiber, the ZAB cell delivers the superior power density (301 mW cm −2 ) and long-term cycling stability over 280 h at 25 °C, and maintains the power densities of 126 mW cm −2 even the temperature decreases to −25 °C. Moreover, the solid-state ZAB exhibits significant flexibility and superior properties in a wide temperature range. Therefore, this work not only proposes a new strategy to design the high-performance bifunctional electrocatalysts, but also propels the development of flexible power sources for all-climate applications.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）