CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Kaiyu Liu,Yanzhen Qiu,Wenqi Liu,Zhe Feng,Huimin Jiang,Jianjian Lin
Graphical We have synthesized Fe-doped CoNi 2 S 4 @CC with sulfur vacancies (Fe-CoNi 2 S 4-x @CC). The catalyst exhibited excellent OER and overall water splitting performance, which is attributed to the fact that vacancy engineering and iron doping synergistically promote charge transfer to enhance the catalyst performance. Transition metal sulfides have emerged as promising alternatives to precious metal catalysts for sustainable electrocatalytic hydrogen production. However, achieving simultaneous optimization of active site exposure and vacancy-electron interplay remains a critical challenge. Herein, we develop a dual-regulation strategy integrating Fe-doping and high-temperature annealing to synthesize sulfur-deficient Fe-doped CoNi 2 S 4 @CC nanocatalysts (Fe-CoNi 2 S 4-x @CC). The approach innovatively combines heteroatom doping and vacancy engineering, where iron doping leads to lattice dilation and sulfur vacancies create vacancy defects, thereby exposing a large number of active sites. The designed catalysts have iron-induced charge redistribution and vacancy tailored adsorption energies synergistically in the dual active center and expose more active sites to accelerate charge transfer. Intriguingly, the Fe-CoNi 2 S 4-x @CC achieves a low overpotential of 194.72 mV@10 mA cm −2 in alkaline media, surpassing most reported CoNi-based sulfides. More remarkably, it demonstrates exceptional kinetics with a Tafel slope of 43.2 mV dec −1 and enhanced active site utilization evidenced by its high electrochemical double layer capacitance value (31.3 mF cm −2 ). This work presents a significant advance for the rational design of high-performance OER catalysts by demonstrating a synergistic modulation strategy that integrates cation doping and vacancy engineering in Fe-doped CoNi 2 S 4 @CC, which not only optimizes the electronic structure but also increases the rate of charge transfer to enhance the catalytic activity.
研究领域:
材料科学
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电化学
·
催化
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纳米技术
·
能量转换
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yangyang Mao,Dong Chen,Yuchao Chen,Yupeng Xiao,Tianle Li,Xiaoqian Hao,Jiyuan You,Wenju Wang,Yuqian Li,Shaoliang Meng,Jun Wu,Jiucheng Zhao
Lithium-sulfur (Li-S) batteries are considered the most promising candidate for achieving a low-cost high-energy–density system. One of the biggest deterrents during the practical application of Li-S batteries is the shuttle effect which causes fast capacity degradation and poor rate performance. 3D CoNi 2 S 4 with 3D interconnected porous nitrogen doping carbon was prepared by sulfurizing the precursor Prussian blue analogues. The CoNi 2 S 4 nanoparticles are confined in the carbon framework, affording interconnected macro-mesoporous channels. The constructed 3D CoNi 2 S 4 modified separator effectively accommodates enough electrolytes and provides more exposed active sites that suppress the shuttle effect through trapping polysulfides and accelerating the lithiation of S 8 to Li 2 S. Thus, Li-S batteries with 3D CoNi 2 S 4 -PP separators exhibit high-rate capacity and remarkable cycle stability. Furthermore, based on the modified separators, a high sulfur loading cathode delivers an areal capacity of 5.62 mAh cm −2 . The separator size expands further to assemble the 1Ah Li-S pouch cell, confirming the practicality. This work provides an efficient strategy with a modified separator for high-performance Li-S batteries.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Peng Liu,Yanwei Sui,Fuxiang Wei,Jiqiu Qi,Qingkun Meng,Yaojian Ren,Yezeng He
In this study, a simple one-step hydrothermal method was developed to prepare a novel hierarchical CoNi 2 S 4 nanostructure similar to rambutan fruit. The surface microstructural study clearly visualized that the rambutan-like CoNi 2 S 4 consists of nanorods grown directly on the surface of spherical core structures. The close attachment of the nanorods to the spheres increased the active areas of the electrode, which facilitates efficient charge transport from the nanorods to the spherical core structure. CoNi 2 S 4 with a rambutan-like hierarchical structure showed an excellent specific capacitance of 944 F g − 1 at 1 A g − 1 , considerable rate capacitance (75.6% retention at 10 A g − 1 ) and excellent cycling life (91.1% retention after 5000 circulations) in the three-electrode system. Besides, the assembled hybrid supercapacitor based on CoNi 2 S 4 and reduced graphene oxide exhibited a high specific energy density of 23.58 Wh kg − 1 at the power density of 800 W kg − 1 .
研究领域:
材料科学
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能量存储
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纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Chunrong Yan,Yuxin Chen,Shuaijie Han,Yingdong Wang,Haixia Zhang,Ying Hou,Junjie Guo
Layered double hydroxides (LDHs) are promising cathode materials for supercapacitors but are limited by insufficient active sites and poor reaction kinetics. To address this, this work develops a CoNi 2 S 4 /NiCo-LDH/Cu 2 S composite with a multilevel heterostructure via localized in-situ sulfidation. The structure features 1D Cu 2 S nanorods as a framework, 2D NiCo-LDH nanosheets providing high surface area, and 0D CoNi 2 S 4 nanoparticles grown in situ as additional active sites. This design enhances conductivity, surface area, and redox-active sites, promoting ion adsorption and migration. The electrode achieves an areal capacitance of 12.4 F cm −2 at 3 mA cm −2 and retains 80.6% at 20 mA cm −2 . The assembled asymmetric supercapacitor delivers an energy density of 1.29 mWh cm −2 and power density of 2.39 mW cm −2 , with 90.7% capacitance retention and 99.6% coulombic efficiency after 10,000 cycles. It also powers an LED and fan, demonstrating practical potential. This study offers new insights into designing high-performance electrodes through multilevel heterostructures and localized in-situ sulfidation.
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Haonan Li,Wa Gao,Kangli Ma,Jian Lei,Olim Ruzimuradov,Akhtam Samiev,Ya Chen,Jingxiang Low,Yue Li
Cocatalyst loading has been extensively adopted in photocatalysis for enhancing photocatalytic performance. However, the sluggish interfacial charge dynamics between cocatalyst and photocatalyst has restricted the wide applications of such a strategy. Herein, we introduce the Ni–N interfacial bonds between lamellar nitrogen-vacancy-rich g-C 3 N 4 /CoNi 2 S 4 nanoparticles (CN-V N /CoNi 2 S 4 ) composite material to bridge the photogenerated charge carrier separation at their interface. Specifically, extended X-ray absorption fine structure analysis reveals that these Ni–N interfacial bonds are originated from the bonding of CoNi 2 S 4 with the nitrogen atoms adjacent to the nitrogen vacancies (V N ) in g-C 3 N 4 . Experimental evidence and theoretical calculations reveal that Ni–N interfacial bonds cannot only cause an intimate contact interface between CN-V N /CoNi 2 S 4 , but also modulate the charge distribution on the CN-V N and CoNi 2 S 4 , further boosting the photogenerated charge carrier separation. More interestingly, this tailored interfacial microenvironment significantly reduces the energy barrier for key intermediates formation while modulates the rate-determining step from *COOH generation to CO desorption, enabling efficient and controllable CO production. This work establishes a methodological framework for engineering advanced photocatalysts, enabling high-efficiency conversion of solar energy into clean fuels.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 21
·19077-19086
·
IF 2.195
Liu Peng,Sui Yanwei,Wei Fuxiang,Qi Jiqiu,Meng Qingkun,Ren Yaojian,He Yezeng
A facile one-step hydrothermal route has been developed to directly synthesize CoNi 2 S 4 nanoparticles on carbon fiber cloth (CC) to study the synergistic effect of bimetallic sulfides and carbon substrate on the electrochemical performance of supercapacitor electrode. The integrated binder-free CoNi 2 S 4 /CC electrode possesses an outstanding specific capacitance of 1165 F g −1 at 1 A g −1 , and excellent rate capacitance (75.3% retention at 10 A g −1 ) in a three-electrode system, which is 27.2% and 32.2% higher than that of pure CoNi 2 S 4 electrode. Detailed electrochemical tests and results showed that the surface capacitance effect ratio of the CoNi 2 S 4 /CC electrode is higher than that of pure CoNi 2 S 4 electrode because of the introduction of CC. The CC substrates can provide a channel for electrolyte electrons and ions to promote reaction kinetics and shorten the diffusion distance of the redox reaction, thereby improving the performance of the pseudocapacitor CoNi 2 S 4 . Besides, the assembled asymmetric supercapacitors based on CoNi 2 S 4 /CC electrode and reduced graphene oxide electrode displayed a high specific energy density of 33.2 Wh kg −1 at 800 W kg −1 , remarkable electrochemical stability (87.1% retention after 10,000 circulations) and high rate stability.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 12
·期 3
·1816-1825
·
IF 11.9
Qian Chen,Ziqiang Wu,Lili Zhu,Changdian Li,Xuebin Zhu,Yuping Sun
Ternary nickel–cobalt sulfides with excellent electrical conductivity and high electrochemical activity can serve as ideal cathode materials for flexible hybrid supercapacitors. The electrochemical performance of the nickel–cobalt sulfides can be well tuned by different Ni and Co contents. Herein, nickel–cobalt sulfides with different Ni/Co ratios have been successfully prepared on carbon cloth (CC) by applying a two-step method: first the electrodeposition of hydroxide precursors on CC and then the subsequent sulphuration using a hydrothermal method. By systematically investigating the ratio effects of Ni and Co ions on the growth and capacity contribution of materials, the CoNi2S4/CC electrode presented a high utilization of electrochemically active sites, showing excellent electrochemical performance. The effect of different mass loadings of up to 18.80 mg cm−2 of CoNi2S4/CC on electrochemical performance was further investigated, and it was observed that the areal capacity is positively correlated with the mass loading. A high areal capacity of 11.11 C cm−2 at 2 mA cm−2 was observed for the synthesized CoNi2S4/CC with excellent rate capability and long cycle life. Furthermore, flexible hybrid supercapacitors with CoNi2S4-1000/CC as the positive electrode and activated carbon as the negative electrode deliver a maximum power density of 2.99 mW cm−2 at a 0.252 mW h cm−2 energy density and an outstanding cyclic stability. The results provide a novel route for preparing high-mass loading nickel–cobalt sulfide electrodes with outstanding areal capacity.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Dewei Liang,Yan Wang,Zhubo Chu,Sihan Ji,Changhao Liang
Transition metal sulfides have garnered considerable interest as promising anode material candidates for sodium-ion batteries, owing to their superior theoretical capacity and cost efficiency. Nevertheless, the real-world applications of these materials are hindered by their slow reaction kinetics and considerable volumetric expansion during cycling, which results in a less-than-ideal electrochemical performance. Herein, a novel composite of CoNi2S4/C hollow nanospheres (CoNi2S4/C HSs) is successfully prepared through a one-step solvothermal approach. The unique hollow structure of the CoNi2S4/C HSs composite provides it with an increased specific surface area, accelerated Na+ diffusion kinetics, and reduced electrical resistance compared to CoNi2S4/C nanoparticles (CoNi2S4/C NPs). As a result, CoNi2S4/C HSs demonstrate an exceptional average capacity of 649.5 mAh g–1 at a current density of 0.1 A g–1 and maintain a capacity of 495.5 mAh g–1 after 1000 cycles at a high current density of 10.0 A g–1. These values exceed those of the CoNi2S4/C NPs, highlighting their superior electrochemical sodium storage performance. It is demonstrated through density functional theory calculations that the interfacial dipole enhances electronic coupling, thereby facilitating rapid interfacial electron transfer. Furthermore, due to the interfacial dipole effect, Na+ is found to preferentially adsorb at the interface of C and CoNi2S4, where they exhibit a relatively lower diffusion energy barrier. The proposed structural design offers a promising approach for the advancement of the electrochemical sodium storage performance of bimetallic sulfides.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Zhiyong Gao,Chen Chen,Jiuli Chang,Liming Chen,Panyue Wang,Dapeng Wu,Fang Xu,Yuming Guo,Kai Jiang
Poor cycleability is the main shortage of faradic supercapacitors , which can be generally improved by the compositing or coating with flexible and conductive auxiliary components. Herein, reduced graphene oxide (rGO) coated CoNi 2 S 4 grown onto Ni foam substrate was synthesized by a two-step hydrothermal strategy. The rGO coating apparently improved the cycleability of the CoNi 2 S 4 electrode without sacrificing total capacitance, therefore resulted in efficient and long lifetime energy storage device. The rGO coated CoNi 2 S 4 electrode, denoted as CoNi 2 S 4 -rGO electrode, demonstrated a specific capacitance ( C s ) of 1680 F g -1 at 1 A g −1 and considerable rate capability (62% capacitance retaining ratio within 1–20 A g −1 ). More importantly, the cycleability of the CoNi 2 S 4 -rGO electrode enhanced by 46% relative to the mere CoNi 2 S 4 electrode after 5000 charge-discharge cycles, which is mainly due to the inhibition of shedding of faradic CoNi 2 S 4 from electrode by rGO coating. When used as positive electrode of asymmetric supercapacitor (ASC), the CoNi 2 S 4 -rGO//porous carbon supercapacitor delivered an energy density of 51.7 Wh kg −1 at 762 W kg −1 , and 60.5% of its initial capacitance was maintained after 5000 charge-discharge cycles. The balanced energy, power densities and cycleability highlight the potential of the rGO coated faradic electrode in energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yating Fei,Haobo Wang,Yifan Xu,Lili Song,Yuehua Man,Yichen Du,Jianchun Bao,Xiaosi Zhou
Mg-ion batteries (MIBs), as a next-generation battery, are drawing considerable attention due to abundant and well-distributed magnesium sources available. The construction of structurally ideal bimetallic sulfides can effectively alleviate the poor cycling stability of MIBs. Herein, we report for the first time, the synthesis of bimetallic sulfide CoNi 2 S 4 hollow nanospheres (CoNi 2 S 4 HSs) via a one-step solvothermal method and their application as a cathode material for MIBs. Compared with common unary transition metal sulfides, CoNi 2 S 4 HSs have more electrochemically active sites and higher electronic conductivity. Meanwhile, the distinct morphology of CoNi 2 S 4 HSs exhibits higher surface area, smaller charge-transfer resistance, and higher magnesium diffusion coefficient. Further, CoNi 2 S 4 HSs deliver a considerable reversible capacity of 290.1 mAh g −1 at 50 mA g −1 , and a high capacity of 97.8 mAh g −1 can be achieved at 1000 mA g −1 , demonstrating excellent rate performance. The structural integrity, high specific capacity, good rate capability and cycling stability of CoNi 2 S 4 HSs render it a promising cathode material for advanced MIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 32
·1-15
·
IF 2.8
Zhang Yaqin,Deng Jinming,Luo Min,Pang Tian,Shi Pu,Li Fuzhi
Transitional bimetallic sulfides are highly attractive electrode materials for supercapacitors because of their remarkable electrochemical activity. However, designing and preparing efficient transitional bimetallic sulfides with super specific capacitance, high energy density, and good cycling stability by simple methods are still facing great challenges. Herein, a cauliflower-like spinel-type CoNi 2 S 4 microsphere structure is synthesized by a facile solvothermal method using layered cobalt nickel hydroxides (CoNi-LDH) precursor as raw material and thioacetamide as sulfurizing reagent. The as-prepared CoNi 2 S 4 electrode exhibits an exceptional specific capacitance high up to 2384 F g −1 at 1 A g −1 , significantly higher than that of cobalt nickel hydroxide precursor (1358 F g −1 ), which can be due to the higher electrical conductivity of CoNi 2 S 4 than the precursor, the sulfur element which has lower electronegativity than the oxygen element, leading to rapider reversible redox processes, and the unique cauliflower-like micromorphology with rough surface. The constructed CoNi 2 S 4 //PC asymmetric supercapacitor exhibits excellent electrochemical performance with an extremely high energy density of 71.97 Wh kg −1 at the power density of 375 W kg −1 , a remarkable capacity retention rate of 88.43% after 5000 cycles at 5 A g −1 , and an impressive coulombic efficiency of 99.8%. The outstanding electrochemical properties suggest that CoNi 2 S 4 would be a promising candidate for supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2026
·Vol. 17
·期 4
·408
·
IF 3.5
Yaqiang Ji,Junfeng Huang,Weibin Yin,Junrui Xiang,Yongquan Liu,Yongjun Huang,Jingsheng Hong,Long Li
Bifunctional materials present a promising route to develop advanced devices, yet the dual performance of CoNi2S4nanosheets anchored on a porous scaffold is seldom reported. Herein, we propose a rational fabrication strategy to construct a three-dimensional hierarchical electrode via the in-situ growth of densely aligned CoNi2S4nanosheets on a conductive fabric scaffold. This integrated porous architecture concurrently offers an ultrahigh specific surface area, efficient mass transport, and rapid electron conduction. As a supercapacitor, the electrode achieves a high areal capacitance of 3198 mF cm−2at 4 mA cm−2and retains 98.1% of its initial capacitance after 1000 cycles at 20 mA cm−2. As a non-enzymatic glucose sensor, it exhibits outstanding selectivity (<4.1% interference), high sensitivity (1049 μA mM−1cm−2), a wide linear range (1–8 mM), and a low detection limit (1 μM). These results highlight the significant potential of this binder-free, scaffold-supported nanosheet design for advancing integrated energy storage and biosensing systems.
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DOI
高影响因子
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