DIAMOND AND RELATED MATERIALS
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2025
·
IF 5.1
Huayan Zhang,Tao Liao,Lingli Zheng,Chenning Liu,Junjie Sa,Yingying Han,Miao Yu
Carbon-based nanocomposites, characterized by distinctive structural properties, significantly enhance the kinetics of electron and ion transfer for energy storage, thereby achieving remarkable capacitive performance. In this work, Zanthoxylum bungeanum branches derived porous carbon (PC) was fabricated by an effective microwave heating approach. The resulting PC shows a highly developed porous structure and exhibits excellent capacitive behavior, attaining a capacitance of 557.1 F g −1 (at 0.5 A g −1 ). Furthermore, porous carbon@NiCo 2 S 4 (PC@NCS) composites were prepared through a two-step hydrothermal coating approach, in which the NiCo 2 S 4 with an urchin-like morphology was uniformly anchored onto the carbon matrix. This configuration effectively integrates the good conductivity of carbonaceous materials and the high capacity of NiCo 2 S 4 , demonstrating superior specific capacitance of 1176.7 F g −1 (at 0.5 A g −1 ) compared with that of a pure PC. An asymmetric supercapacitor device was assembled utilizing PC and PC@NCS as positive and negative electrodes via a facile screen-printing method. The device achieves a remarkable energy density of 17.58 Wh kg −1 at a power density of 750 W kg −1 and maintains exceptional cycling performance (86.22 % capacitance retention after 100 bending/recovery cycles). Additionally, series-connected flexible supercapacitors were capable of powering small electronic devices after a short charging time, such as LED bulbs and mini fan. These findings demonstrated this study paves a novel way for developing outstanding performance of biomass-based supercapacitors.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Thao Pham Manh,Dinh Son Le,Ky Nguyen Van,Lan Ngo Thi,Tien Phat Doan,Dinh Thao Vu,Tuan Nguyen Van,Thu Hoa Nguyen Thi,Nguyen Vo Anh Duy,Minh Triet Dang,Nguyen To Van
s The present study demonstrates a successful synthesis of manganese-doped nickel cobalt sulfides (Mn-NiCo 2 S 4 ), which deliver marked improvements in electrochemical properties compared to pristine NiCo 2 S 4 . Comprehensive structural, morphological, compositional, surface, and electronic characterizations provide clear insights into the enhanced performance. Specifically, we identify three primary factors contributing to the superior electrochemical behaviors of Mn-NiCo 2 S 4 : ( i ) the appearance of hollow nanorods, which facilitates electrolyte access and improves ionic transport; ( ii ) the synergistic effects arising from the Faradaic reactions, which play a crucial role in boosting the electrochemical performance of Mn-NiCo 2 S 4 compared to the unmodified NiCo 2 S 4 ; and ( iii ) the enhances electronic conductivity from increased electron density and effective charge redistribution due to Mn doping confirmed by density functional theory simulations and experimental observations, leading to reduced internal resistance and improved electrochemical kinetics. Remarkably, Mn-NiCo 2 S 4 achieves an exceptional specific capacity of 470 C g -1 at a current density of 1 A g -1 . Additionally, the Mn-NiCo 2 S 4 //AC asymmetric supercapacitor delivers impressive energy densities ranging from 37.09 to 84.85 Wh kg -1 , corresponding to power densities decreasing from 7.09 to 0.79 kW kg -1 ; maintaining 50.52% capacity retention after 10,000 cycles at 2 mA cm -2 . These results underscore the potential of Mn-NiCo 2 S 4 and related doped materials as next-generation electrodes for advanced, high-performance supercapacitors, paving the way for significant advancements in energy storage technology.
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MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
S. Wei,Q. Zhu,C. Wang,X.B. Yang,B. Zhou,Z.Q. Duan,Z.X. Xie,Y.M. Hu
A facile and green approach to composites containing nitrogen doped lotus seedpods biocarbon (NALC) and NiCo 2 S 4 (NCS) is reported. The composites present excellent electrocatalytic activity for reduction from I 3 − to I − due to the synergistic effect between the nanocrystalline NCS and the NALC. Dye-sensitized solar cells (DSSCs) assembled with the as-prepared NALC@NCS counter electrodes (CEs) achieve impressive photovoltaic conversion efficiency (PCE) of 8.58%, which is higher than that by the same structured cell with Pt (7.85%) and NCS (7.53%) CEs. Compared with other NCS based CEs, the NALC@NCS CEs show good durability and stability, suggesting that combining nanocrystalline catalyst with biocarbon is beneficial to stimulate the synergistic effect, and is a feasible strategy to optimal CEs for high performance DSSCs. Low cost NALC@NCS composites developed in this work are environmentally friendly, stable and efficient, which are believed to be good candidates for Pt-free CE materials in DSSCs and electrocatalysis applications.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 38
·25919-25926
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IF 4.123
Junwen Peng,Junli Xu,Zhaoyu Wang,Zhengxin Ding,Sibo Wang
Developing efficient alternatives to the widely used Pt cocatalyst in photocatalytic H2O splitting is of great importance in view of large-scale production of clear H2 energy. Herein, we report the facile synthesis of NiCo2S4 and its first use as a highly active and cost-affordable cocatalyst to boost visible light H2 generation with the CdS semiconductor. The synthesized NiCo2S4/CdS composite materials are fully characterized by various techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-Vis diffusion reflectance spectroscopy (DRS), and N2 adsorption measurements. With the optimized NiCo2S4/CdS composite sample, a high H2 generation rate of 137 μmol h−1 is obtained under visible light irradiation, which is more than 17 times higher than that of bare CdS material. The results of photoluminescence (PL) spectroscopy, transient photocurrent response and electrochemical impedance spectroscopy demonstrate the remarkably promoted migration and separation of photogenerated charge carriers over the heterostructured NiCo2S4/CdS material, thus leading to obviously enhanced photocatalytic performance. Moreover, a possible mechanism for the photocatalytic H2 evolution reaction is also proposed based on the observed results of activity evaluation and photoelectrochemical measurements.
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NANOTECHNOLOGY
·
2021
·Vol. 32
·期 29
·295705
·
IF 3.874
Fangya Qi,Han Li,Fan Yang,Zhipeng Sun
An integrated electrode of core–shell coaxially structured NiCo2S4@TiO2 nanorod arrays/carbon cloth (NiCo2S4@TiO2@CC) have been fabricated, via a two-step hydrothermal method. Comprehensive structural and compositional analyzes are performed to understand the effects of the NiCo2S4 shell on the TiO2 core. Such core–shell arrays structure can significantly provide abundant electroactive sites for redox reactions, convenient ion transport paths, and favorable structure stability. The NiCo2S4@TiO2@CC electrode represents a splendid specific capacitance (650 F g−1 at 1 A g−1) and enhanced cycling stability (capacitance retention of 97% over 10 000 cycles at 5 A g−1). Additionally, the assembled NiCo2S4@TiO2@CC//CNT@CC solid-state asymmetric supercapacitors exhibit a maximal energy density of 0.6 mWh cm−3 at 32.4 W cm−3, and topping cycling stability (85% capacitance retention after 5000 cycles at 5 mA cm−2). The results demonstrate that the well-designed NiCo2S4@TiO2@CC presented in this work are applicable for the development of electrode materials in energy storage devices.
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Enxiang Zhou,Lijun Zhou,Yan Jin,Siyu Cai,Maxim Sychov,Yi Wang,Xihong Lu
Nickel/cobalt-based materials have attracted significant interest as cathode materials for aqueous alkaline Zn batteries (AAZBs) due to their high theoretical capacity and natural abundance. However, their practical application is hindered by unsatisfied discharge capacity and poor cycling stability, primarily caused by insufficient active sites and sluggish reaction kinetics. Herein, an effective approach is demonstrated to achieve high-efficiency and stable cathode for AAZBs by anchoring the NiCo 2 S 4 /Co 9 S 8 heterostructures on MXene nanosheets (NCS/CS@MXene), accompanied with morphological optimization. The introduced MXene significantly increases the effective active area and electrical conductivity of the composite. Consequently, the NCS/CS@MXene//Zn battery delivers a high areal capacity of 1.01 mAh cm −2 at 2 mA cm −2 , excellent cycling stability of 2500 cycles with only 0.00416% of capacity degradation per cycle, and nearly 100% coulombic efficiency.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
·
IF 4.6
Jialong Li,Shiye Cai,C. Srinivasakannan,Tong Han,Gang Xue,Li Wang,Yaping Wang,Xinhui Duan
A hollow octahedral NiCo 2 S 4 /carbon composite was rationally constructed through precursor regulation, sulfidation, and subsequent carbonization using a Cu-MOF-derived template. Benefiting from the well-preserved hollow architecture, uniformly distributed NiCo 2 S 4 active shell, and conductive carbon framework, the optimized 3-NiCo 2 S 4 @HC sample exhibits enhanced electrochemical performance as a supercapacitor electrode. In a three-electrode system, 3-NiCo 2 S 4 @HC delivers a high specific capacity of 858.5 C·g −1 at 1 A·g −1 and retains 84.2% of its initial capacity at 30 A·g −1 . In addition, it shows excellent cycling stability with 94.27% capacity retention after 10,000 cycles at 10 A·g −1 . Kinetic analysis reveals that the charge-storage process involves both diffusion-controlled Faradaic reactions and capacitive contributions, while the hierarchical hollow porous structure facilitates electrolyte infiltration and ion/electron transport. Furthermore, an assembled 3-NiCo 2 S 4 @HC//AC hybrid supercapacitor operates stably up to 1.6 V, delivering an energy density of 54.9 Wh·kg −1 at a power density of 799.9 W·kg −1 , and retaining 84% of its initial capacitance after 10,000 cycles. This work demonstrates that the synergistic integration of hollow structural engineering and carbonization is an effective strategy for developing high-performance Ni Co sulfide-based supercapacitor electrodes.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiong Chen,Weinan Tang,Lin Cai,Yuchen Zhu,Shaobo Peng,Xiaofei Li,Xiaoying Hu,Liang Qiao,Shujie Liu
Reasonable design and preparation of the earth abundant and efficient electrocatalysts for hydrogen production from the electrolysis of water is an effective solution to solve the growing global energy and environmental crisis. Herein, in order to increase the number of the active sites and fasten the charge transfer of NiCo 2 S 4 , a facile two-step solvothermal method is used to prepare superdispersed NiCo 2 S 4 nanoparticles anchored on reduced graphene oxide (NCS/rGO) as low-cost and high-efficient electrocatalyst for hydrogen evolution reaction (HER). By modulating the amount of rGO, the as-prepared NCS/rGO composite shows high specific surface area of 114.4 m 2 g −1 and small particle size of 50–60 nm, which exhibits excellent HER activity with a lower overpotential of 115 mV at 10 mA cm −2 and a smaller charge transfer resistance of 12 Ω in acidic solution. Additionally, in the case of alkaline solution, the as-prepared NCS/rGO composite also exhibits a low overpotential of 241 mV and a small Tafel slope of 110 mV dec −1 . The significantly improved HER performance of NCS/rGO composite can be ascribed to the constructed heterogeneous interface between NiCo 2 S 4 nanoparticles and rGO, which can inhibit the aggregation of NiCo 2 S 4 nanoparticles and enhance the intrinsic electrical conductivity . In light of the excellent HER electrocatalytic performance, the inexpensive NCS/rGO composite might be regarded as a promising alternative in HER and other energy conversion and storage applications.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jintang Zhou,Yijie Liu,Congyu Zhou,Weize Wang,Lvtong Duan,Yucheng Wang,Zhengjun Yao
The modern and complex environment requires microwave absorbing materials (MAMs) that can cope with environmental changes. In particular, the high humidity, high salt spray and high temperature of the marine environment conditions have been the toughest. Consequently, the development of integrated materials with both microwave absorption (MA) and corrosion resistance has emerged as a top priority. In this work, spherical NiCo 2 S 4 (NCS) particles with stable size were prepared by a simple solvothermal method. Furthermore, the self-polymerization of dopamine (PDA) on the surface of NCS was achieved by exploiting the film-forming ease of dopamine. A series of PDA-NCS particles with different interfaces were fabricated by tuning the ratio of NCS and dopamine. The integrated magneto-electric drive synergy enhances the impedance matching. Multiple heterogeneous interfaces enhance the depletion efficiency of electromagnetic waves (EMWs) within the material. The samples designed have achieved an effective absorption bandwidth (EAB) value of 6.26 GHz and a maximum reflection loss value of −22 dB at a low thickness of 1.7 mm. Meanwhile, due to the electrochemical protection reaction of anode of metal and the passivation effect of barrier by PDA. The prepared coatings maintained favorable corrosion resistance in 240 h of continuous salt spray environment. Moreover, after the 240 h salt spray experiment, the sample realized the EAB value of 4.77 GHz at a thickness of 1.7 mm. This work breaks new ground for the development of absorbing and anti-corrosion integrated materials.
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 7
·3228-3237
·
IF 10.733
Yu Ouyang,Haitao Ye,Xifeng Xia,Xinyan Jiao,Guangmin Li,Sadaf Mutahir,Liang Wang,Daniel Mandler,Wu Lei,Qingli Hao
Binder-free electrodes with core–shell structures have shown great potential in a variety of important energy storage systems. In order to endow the core–shell hierarchical structure with enhanced electrochemical properties, rationally designed and fabricated hierarchical structures with controllable morphology and great electrical conductivity are highly desired. In this work, a uniform dendritic S-Co3O4@NiCo2S4 hierarchical structure grown on Ni foam was successfully designed and synthesized via sulfur-doping of Co3O4 (S-Co3O4) as the inner core with enhanced conductivity. The hierarchical electrode exhibited high areal capacity (10.9 mA h cm−2 at a current density of 8 mA cm−2), a good rate performance (72.5% retention after increasing the current densities from 8 to 30 mA cm−2), and excellent cycling stability (97.3% retention after 5000 cycles). Moreover, a hybrid energy storage battery-supercapacitor device, constructed from a S-Co3O4@NiCo2S4 positive electrode and an active carbon (AC) negative electrode, showed high energy density and power density. Contributing to short ion diffusion, large electroactive sites and low contact resistance, our work not only demonstrates a promising electrode for energy storage battery-supercapacitor hybrid (BSH) devices, but also provides an attractive strategy for the design of electrode materials.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 14
·13462-13473
·
IF 2.195
Zhan Jiang,Shan Lina,Sui Yanwei,Qi Jiqiu,Wei Fuxiang,He Yezeng,Meng Qingkun,Sun Zhi,Liu Jinlong
Flexible electrodes for preparing core–shell structures are receiving increasing attention. A composite electrode material with NiCo 2 S 4 as the core and Ni 3 S 2 as the shell was successfully synthesized by hydrothermal synthesis and electrodeposition method. The prepared flexible NiCo 2 S 4 @Ni 3 S 2 core/shell nanorod array has higher electrochemical performance, with specific capacitance of 5.714 F cm −2 at 2 mA cm −2 and excellent cycle stability. In addition, the prepared flexible hybrid supercapacitor has been assembled with NiCo 2 S 4 @Ni 3 S 2 as the positive electrode and Fe 2 O 3 -rGO as the negative electrode, delivering an energy density of 5.9 mWh cm −3 at 171 mW cm −3 . These results make the NiCo 2 S 4 @Ni 3 S 2 a high-performance supercapacitor application candidate.
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CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zhongjuan Wang,Li-chao Nengzi,Xinyi Zhang,Zhuanjun Zhao,Xiuwen Cheng
In recent years, sulfate radicals-based advanced oxidation process becomes an effective and common technique for elimination of emerging organic contaminants. In this study, novel NiCo 2 S 4 /CS composite was synthesized through hydrothermal method, with the physicochemical properties being characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microcopy (TEM), Brunauer-Emmett-Teller (BET) and Fourier Transform infrared spectroscopy (FT-IR). Then, NiCo 2 S 4 /CS composite acted as catalyst to activate PS for nimesulide degradation. The results showed that NiCo 2 S 4 /CS composite owned the highest activity compared with pure NiCo 2 S 4 and carbon sphere (CS), achieving 92% nimesulide degradation in 10 min with 0.1 g/L catalyst and 0.4 g/L persulfate. Furthermore, the NiCo 2 S 4 /CS membrane was fabricated by vacuum filtration, and 94% and 80% above nimesulide degradation were realized for the first time and after six times repeated experiment, which demonstrated that the catalyst was convenient to achieve recovery and reusability. In addition, the radical quenching experiment, XPS and the electrochemical methods (LSV and EIS) were measured to investigate the possible mechanism pathway, the results of which showed that both the non-radical pathway and radical pathway might attribute to nimesulide degradation, while the SO4 − remained the dominant species. This research provided a novel sulfide NiCo 2 S 4 /CS membrane for the oxidative technique for emerging organic contaminants in water treatment.
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