JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
He Wang,Hongling Guo,Zihao Huang,Weiliang Liu,Mei Li,Jinshui Yao,Jiaxi Cui,Yuanhao Wang,Manman Ren
The high activity barriers of Li 2 S nucleation and deposition limit the redox reaction kinetics of lithium polysulfides (LiPSs), meanwhile, the significant shuttle effect of LiPSs hampers the advancement of Li-S batteries (LSBs). In this work, a NiSe 2 /CoSe 2 -rGO (NiSe 2 /CoSe 2 -G) sulfur host with bifunctional catalytic activity was prepared through a hard template method. Electrochemical experiment results confirm that the combination of NiSe 2 and CoSe 2 not only facilitates the bidirectional catalytic function during charge and discharge processes, but also increases the active sites toward LiPSs adsorption. Simultaneously, the highly conductive rGO network enhances the electronic conductivity of NiSe 2 /CoSe 2 -G/S and provides convenience for loading NiSe 2 /CoSe 2 catalysts. Benefitting from the exceptional catalytic-adsorption capability of NiSe 2 /CoSe 2 and the presence of rGO, the NiSe 2 /CoSe 2 -G/S electrode exhibits excellent electrochemical properties . At 1C, it demonstrates a low capacity attenuation of 0.087 % per cycle during 500 cycles. The electrode can maintain a discharge capacity of 927 mAh/g at a sulfur loading of 3.3 mg cm −2 . The bidirectional catalytic activity of NiSe 2 /CoSe 2 -G offers a prospective approach to expedite the redox reactions of active S, meanwhile, this work also offers an ideal approach for designing efficient S hosts for LSBs.
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
Materials Today Communications
·
2022
·
IF 3.662
Qingqing Chen,Jinlong Hu,Qi Xia,Youpeng Li,Haoxiang Zhong,Lingzhi Zhang
Ultrafine CoSe 2 nanoparticle/porous silicon oxycarbonitride composite (CoSe 2 /P-SiOCN) is developed as modifying material of separator to improve the electrochemical performance of lithium-sulfur batteries by promoting polysulfides (LiPSs) trapping and the redox kinetics of sulfur species. CoSe 2 /P-SiOCN is prepared through pyrolyzing the Schiff-base-SiO 2 precursors with Co 2+ ions, subsequent selenylation and removal of silica domain. The conventional separator is modified by coating CoSe 2 /P-SiOCN on the side for facing sulfur cathode. In this structural design, the porous structure of silicon oxycarbonitride (P-SiOCN) functions as polysulfides trapping and support matrix of CoSe 2 nanoparticles, while the ultrafine CoSe 2 nanoparticles (~7.8 nm) can efficiently promote the redox kinetics of sulfur species. The cell with CoSe 2 /P-SiOCN modified separator exhibits better cycling and rate performance than that with P-SiOCN modified separator and the pristine separator. At 1 C, the cell delivers a high reversible discharge capacity of 568.1 mAh g −1 after 400 cycles with a low capacity decay of 0.042 % per cycle.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuya Yuan,Guowei Liu,Qingsheng Zhang,Taifeng Liu,Jianjun Yang,Zhongjie Guan
Element doping has been demonstrated as a useful strategy to regulate the band gap and electronic structure of photocatalyst for improving photocatalytic activity. Herein, ZnIn 2 S 4 (ZIS) nanosheets were doped with alkali metal ions (Li + , Na + or K + ) by a simple solution method. Experimental characterizations reveal that alkali metal ions doping reduce the band gap, raise the conduction band position, and improve surface hydrophilicity of ZIS. In addition, theoretical calculations show that Na doping increases the electron density at valence band maximum and surrounding S atom, which is conducive to produce more electrons and effective utilization of electrons, respectively. Benefited from above factors, Na-doped ZIS (Na-ZIS) shows the highest photocatalytic hydrogen evolution performance. Furthermore, CoSe 2 cocatalyst is loaded on the surface of Na-ZIS (CS/Na-ZIS), which further improve the charge separation and prolong the lifetime of charges. As a result, the optimized CS/Na-ZIS shows a H 2 evolution rate of 4525 μmol·g −1 ·h −1 with an apparent quantum efficiency of 27.5 % at 420 nm, which are much higher than that of pure ZIS. This study provides an in-depth understanding of the synergistic effect of Na doping and CoSe 2 cocatalyst in ameliorating photocatalytic activity.
研究领域:
材料科学
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催化
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能源材料
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光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2020
·Vol. 10
·期 25
·2000892
·
IF 25.245
Yongchao Tang,Xuejin Li,Haiming Lv,Dong Xie,Wenlong Wang,Chunyi Zhi,Hongfei Li
In aqueous alkaline Zn batteries (AZBs), the Co 3+ /Co 4+ redox pair offers a higher voltage plateau than its Co 2+ /Co 3+ counterpart. However, related studies are scarce, due to two challenges: the Co 3+ /Co 4+ redox pair is more difficult to activate than Co 2+ /Co 3+ ; once activated, the Co 3+ /Co 4+ redox pair is unstable, owing to the rapid reduction of surplus Co 3+ to Co 2+ . Herein, CoSe 2− x is employed as a cathode material in AZBs. Electrochemical analysis recognizes the principal contributions of the Co 3+ /Co 4+ redox pair to the capacity and voltage plateau. Mechanistic studies reveal that CoSe 2− x initially undergoes a phase transformation to derived Co x O y Se z , which has not been observed in other Zn//cobalt oxide batteries. The Se doping effect is conducive to sustaining abundant and stable Co 3+ species in Co x O y Se z . As a result, the battery achieves a 10 000-cycle ultralong lifespan with 0.02% cycle −1 capacity decay, a 1.9-V voltage plateau, and an immense areal specific capacity compared to its low-valence oxide counterparts. When used in a quasi-solid-state electrolyte, as-assembled AZB delivers 4200 cycles and excellent tailorability, a promising result for wearable applications. The presented effective strategy for obtaining long-cyclability cathodes via a phase transformation-induced heteroatom doping effect may promote high-valence metal species mediation toward highly stable electrodes.
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 COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yuanhua Xiao,Yang Kong,Xuezhao Wang,Haoran Luo,Gaozhan Yuan,Shiwei Zhang,Aiqing Zhang,Jun Zhou,Yuanyuan Fan,Ling Xin,Anle Wang,Shaoming Fang,Yujie Zheng
The intriguing characteristics of two-dimensional (2D) heterostructures stem from their unique interfaces, which can improve ion storage capability and rate performance. However, there are still challenges in increasing the proportion of heterogeneous interfaces in materials and understanding the complex interaction mechanisms at these interfaces. Here, we have successfully synthesized confined CoSe 2 within the interlayer space of Ti 3 C 2 T x through a simple solvothermal method, resulting in the formation of a superlattice-like heterostructures of CoSe 2 @Ti 3 C 2 T x . Both density functional theory (DFT) calculations and experimental results show that compared with CoSe 2 and Ti 3 C 2 T x , CoSe 2 @Ti 3 C 2 T x can significantly improve adsorption of Na + ions, while maintaining low volume expansion and high Na + ions migration rate. The heterostructure formed by MXene and CoSe 2 is a Schottky heterostructure, and its interfacial charge transfer induces a built-in electric field that promotes rapid ion transport. When CoSe 2 @Ti 3 C 2 T x was used as an anode material, it exhibits a high specific capacity of up to 600.1 mAh/g and an excellent rate performance of 206.3 mAh/g at 20 A/g. By utilizing CoSe 2 @Ti 3 C 2 T x as the anode and activated carbon (AC) as the cathode, the sodium-ion capacitor of CoSe 2 @Ti 3 C 2 T x //AC exhibits excellent energy and power density (125.0 Wh kg −1 and 22.5 kW kg −1 at 300.0 W kg −1 and 37.5 Wh kg −1 , respectively), as well as a long service life (86.3 % capacity retention over 15,300 cycles at 5 A/g), demonstrating its potential for practical applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yixing Luo,Qingsheng Wu,Yongqing Fu,Ming Wen
Built-in electric field (BIEF) in metallic chalcogenide heterostructures has recently attracted significant attention due to its special interfacial electronic structure and appropriate reaction microenvironment for improving electrocatalytic performance. However, constituent dissolution issues and inferior stability of transition metal selenide heterostructure severely inhibit the formed BIEF to support long-term high-activities for ORR and OER toward zinc-air battery (ZAB). Herein, BIEF was established in CoSe 2 -FeSe 2 hetero-nanostructures encapsulated by N-doped carbon shell on N-doped honeycomb carbon (CoSe 2 -FeSe 2 @NC/NHC) for achieving long-term efficient oxygen electrocatalysis. DFT calculation results confirm that the durable BIEF formed in CoSe 2 -FeSe 2 @NC on NHC not only optimizes interfacial electronic structures and surface adsorption energy, but also offers numerous hyperactive interfacial sites during electrocatalytic reactions. Consequently, the designed CoSe 2 -FeSe 2 @NC/NHC exhibits remarkable performance for both ORR ( E 1/2 = 0.87 V) and OER ( E j = 10 mA cm-2 = 1.54 V), enabling superior peak power density and long-term charging-discharging stability in both liquid-state ZAB (184.3 mW cm −2 and 1350 cycles) and flexible all-solid-state ZAB (61.4 mW cm −2 and 195 cycles). The high durability of BIEF in the core–shell hetero-nanostructured electrocatalyst is crucial for long-term highly-active oxygen electrocatalysis in ZAB.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Bo Zhao,Qianqian Liu,Guijuan Wei,Jianghao Wang,Xin-Yao Yu,Xiang Li,Hao Bin Wu
CoSe 2 is a potential anode material for sodium-ion batteries in terms of their high sodium storage capacity and tunable properties. However, structural degradation and unstable interphase during the reversible sodiation and de-sodiation lead to fast capacity decay. In this work, we develop a nanocomposite architecture based on CoSe 2 nanoparticles embedded in N-doped carbon matrix with conformal TiO 2 coating (CoSe 2 @NC@TiO 2 ) by using a metal-organic framework-assisted strategy. The small CoSe 2 nanoparticles and N-doped carbon matrix facilitate charge transport and suppress the structural degradation, while the redox-active TiO 2 shell further strengthens the structural and interfacial stability without decreasing the capacity. The as-prepared CoSe 2 @NC@TiO 2 nanocomposite particles deliver a reversible sodium storage capacity of 520 mAh g −1 at 0.1 A g −1 with a capacity retention of 78% after 200 cycles, in contrast to the rapid capacity fading after 50 cycles of the pristine CoSe 2 @NC particles without TiO 2 shell.
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
·
2022
·
IF 16.744
Li He,Di Yang,Hainan Zhao,Luyao Wei,Dashuai Wang,Yizhan Wang,Gang Chen,Yingjin Wei
The confinement and catalysis properties of orthorhombic CoSe 2 as a host material for Li-S battery are studied by theoretical and experimental methods. First-principles calculations show that the (111) surface of CoSe 2 possesses adjacent nucleophilic and electrophilic centers. This bi-polar surface can easily bond the polysulfide molecules and catalyze their conversion reactions. As a result, the decomposition energy barriers of polysulfides are greatly decreased from ∼3.0 eV to 0.2–0.4 eV. Following theoretical prediction, CoSe 2 nanocrystals with specific (111) surface are prepared and embedded in porous carbon nanocages using ZIF-67 metal organic framework as a template. Benefited from the advantages of porous C and CoSe 2 (111) surface, the shuttling of polysulfides is suppressed and their conversion kinetics is facilitated. The Li-S cell using this host material exhibits high capacity and remarkable cycle stability, showing a discharge capacity of 1199 mA·h·g −1 at 0.2C and 400 stable cycles at 1.0C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Manigandan Ramadoss,Yuanfu Chen,Yang Hu,Bin Wang,Ramkumar Jeyagopal,Karpuraranjith Marimuthu,Xinqiang Wang,Dongxu Yang
The sluggish kinetics and high cost of the noble-metal based electrocatalyst for oxygen evolution reaction (OER) still seriously limits the efficiencies of water splitting. Herein, for the first time, we rationally design a porous hierarchical nanoarchitecture, constructed by ultrathin CoSe 2 embedded Fe-CoO nanosheets (CoSe 2 @Fe-CoO), which is synthesized via self-assembly hydrolysis driven in-situ synergetic selenization of Fe/Co/O/Se precursor followed by Ostwald ripening. As an OER catalyst, the porous CoSe 2 @Fe-CoO hybrid with abundant CoOOH electroactive sites delivers a small Tafel of 56.2 mV/dec with very low onset overpotential of 280 mV@10 mA/cm 2 and excellent long-term physicochemical stability till 62 h without obvious decay, which outperforms well-established benchmark electrocatalysts (RuO 2 ). The boosted OER performance of CoSe 2 @Fe-CoO nanosheets is mainly attributed to its iron-doping effect, porous nanoarchitecture, and multicomponent synergetic/interfacial effect between ultrathin cobalt (II) oxide and conductive cobalt selenide (CoSe 2 ) nanoframework. This work presents a facile construction strategy to find a nonprecious hybrid OER electrocatalyst with excellent performance and long-term stability.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Jiajia Ye,Xuting Li,Guang Xia,Guanghao Gong,Zhiqiang Zheng,Chuanzhong Chen,Cheng Hu
We report for the first time a Na-ion battery anode material composed of P-doped CoSe 2 nanoparticles (P-CoSe 2 ) with the size of 5–20 nm that are uniformly embed in a 3D porous honeycomb-like carbon network. High rate capability and cycling stability are achieved simultaneously. The honeycomb-like carbon network is rationally designed to support high electrical conductivity, rapid Na-ion diffusion as well as the accommodation of the volume expansion from the active P-CoSe 2 nanoparticles. In particular, heteroatom P-doping within CoSe 2 introduces stronger P-Co bonds and additional P-Se bonds that significantly improve the structure stability of P-CoSe 2 for highly stable sodiation/desodiation over long-term cycling. P-doping also improves the electrical conductivity of the CoSe 2 nanoparticles, leading to highly elevated electrochemical kinetics to deliver high specific capacities at high current densities. Benefiting from the unique nanostructure and atomic-level P-doping, the P-CoSe 2 (2:1)/C anode delivers an excellent cycle stability with a specific capacity of 206.9 mA h g −1 achieved at 2000 mA g −1 after 1000 cycles. In addition, this material can be synthesized using a facile pyrolysis and selenization/phosphorization approach. This study provides new opportunities of heteroatom doping as an effective method to improve the cycling stability of Na-ion anode materials.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
无机功能材料
✓ 已验证
DOI
高影响因子
RARE METALS
·
2020
·Vol. 40
·期 5
·1099-1109
·
IF 2.161
He Bao-Shan,Li Jia-Wen
CoSe 2 nanosheet materials with a wrinkled sheet structure and large surface area were synthesized via a simple hydrothermal method. Then polyethyleneimine (PEI) was used to functionalize wrinkled CoSe 2 (w-CoSe 2 ) to make gold nanocubes (AuNCs) uniformly anchored onto the surface of PEI-w-CoSe 2 via Au–N bonds. And its application in electrochemical immunosensors for the detection of dipropyl phthalate (DPrP) was studied. The obtained material was characterized by the Fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Raman spectroscopy. The effective surface area and conductivity of the electrode were enhanced by the introduction of AuNCs/PEI-w-CoSe 2 nanocomposite. Cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) were used to characterize the performance of immunosensor. After DPrP binds to antibodies via the antigen–antibody interaction, [Fe(CN) 6 ] 3-/4- was used as a signal probe to monitor the change of oxidation current of different DPrP concentrations. Under optimal conditions, the electrochemical responses of the prepared immunosensor were linear when the DPrP concentrations ranged from 1 × 10 −11 to 1 × 10 −5 mol·L −1 , with a detection limit of 1.39 × 10 −12 mol·L −1 . The coefficient of determination ( R 2 ) is 0.995, indicating that the degree of fitting is good. Besides, the constructed immunosensor exhibited acceptable reproducibility, selectivity, and stability. Therefore, it may be found that the composite material has good application prospects in the electrochemical sensors field.
研究领域:
分析化学
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环境科学
·
纳米材料科学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 9
·4722-4732
·
IF 5.503
Jizhao Zou,Qi Luo,Hongliang Wu,Shiyu Liu,Tongbin Lan,Yuechao Yao,Muhammad Aurang Zeb Gul Sial,Fenglin Zhao,Qi Zhang,Xierong Zeng
Transition metal selenide-based materials have been demonstrated as promising electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), yet the actual design of a highly efficient and stable electro-catalyst based on these materials still remains a long and arduous challenge. Herein, a predesigned hybrid Zn/Co zeolitic imidazole framework was used to fabricate CoSe2/Co nanoheteroparticles embedded within hierarchically porous Co, N co-doped carbonnanopolyhedra/nanotubes (CoSe2/Co@NC-CNTs) through a facile approach involving controlled carbonization and selenization procedures. As expected, the optimized CoSe2/Co@NC-CNT-1 displayed outstanding electrocatalytic performance for the ORR and OER, with an onset potential of 0.95 V vs. RHE, a half-wave potential of 0.84 V vs. RHE for ORR, and a potential of 1.69 V vs. RHE for OER at 10 mA cm−2. It also exhibited excellent long-term stability and methanol resistance ability, which were superior to commercial IrO2 and the commercial 20 wt% Pt/C catalyst. Notably, the assembled Zn–air battery with CoSe2/Co@NC-CNT-1 showed a low charge–discharge voltage gap (0.696 V at 10 mA cm−2) and a high peak power density (100.28 mW cm−2) with long-term cycling stability. These superior performances can be ascribed to the synergistic effects of the highly active CoSe2/Co nanoheterostructure, hierarchically porous structure with a large surface area, high electrical conductivity and uniform doping of the Co and N.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）