JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Wenhao Tang,Shiyan Deng,Youlan Zou,Huiyao Li,Shuang Deng,Zengsheng Ma
All-solid-state lithium sulfur batteries (ASSLSBs) hold significant promise in the application of high energy density batteries, yet they suffer from poor ionic conductivity, low Li + transference number and unsatisfactory lithium polysulfides (LiPSs) conversion. In this paper, porous-dual-shell structure and heterojunction Co 3 O 4 @NiCo 2 O 4 is prepared and composited with polyethylene oxide (PEO)-based solid polymer electrolytes (SPEs) to address these problems. The superimposed electric field for Co 3 O 4 @NiCo 2 O 4 composed of the heterointerfaces -build-in electric field and the surface oxygen-rich vacancies-build-in electric field facilitates the dissociation of Li salts, thus improving the ionic conductivity. It exhibits high ionic conductivity of 1.04 × 10 −3 S/cm and Li + transference number of 0.48 at 60 °C. Besides, the incorporation of Co 3 O 4 @NiCo 2 O 4 heterojunction enables fast LiPSs conversion and improves the electrochemical kinetics. The Li//Li cell can work stably for 1100 h at 0.1 mA/cm 2 . The Li//S cell provides an initial capacity of 1170 mA h/g, a reversible capacity of 620.1mA h/g after 100 cycles and 308.3 mA h/g after 450 cycles at 0.2 C.
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高影响因子
Chemistry-An Asian Journal
·
2026
·Vol. 21
·期 2
·e70568
·
IF 3.3
Yankai Zhang,Xiaolei Yu,Fan Liu,Yongping Ma,Jitong Wang
Lithium-sulfur batteries have garnered significant attention from the scientific community due to their intrinsic advantages, including low cost, abundant resources, and high specific energy. However, the shuttle effect of soluble polysulfides and the sluggish redox kinetics of sulfur species have greatly hindered their commercialization and practical application. Herein, we propose a straightforward strategy to construct NiCo 2 O 4 -NC heterostructure nanocages, which serve as multifunctional separator modifiers to improve the electrochemical performance of lithium-sulfur batteries. Specifically, nitrogen doping enhances the polarity of the carbon matrix, enabling both physical confinement and chemical anchoring of polysulfide species. Meanwhile, the embedded NiCo 2 O 4 provides abundant catalytic sites that accelerate the redox kinetics of lithium polysulfides. Consequently, the battery assembled with the optimal NiCo 2 O 4 -NC-1 modified separator demonstrates an excellent initial capacity of 1017.8 mAh g −1 at 0.5 C and a remarkable cycling stability with only 0.04% capacity decay per cycle at 2 C. Moreover, NiCo 2 O 4 -NC-1 exhibits stable electrochemical behavior under high sulfur loading, highlighting its multifunctional structural advantages. This work provides a viable strategy for designing advanced separators in high-performance lithium–sulfur batteries.
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MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Lei Sun,Hao Guo,Zhilan Pan,Bingqing Liu,Ning Wu,Yinsheng Liu,Zongyan Lu,Xiaoqin Wei,Wu Yang
Owing to the high toxicity of acetaminophen (ACOP) and 4-aminophenol (4-AP) when they are overused, the simultaneous determination of ACOP and 4-AP is crucial. In this present paper, an electrochemical sensor based on the nanocomposite of sulfurbridged covalent triazine frameworks (S-CTFs) and in situ formed nickel cobaltite (NiCo 2 O 4 ) nanoflowers on S-CTFs, denoted as S-CTFs@NiCo 2 O 4 , was fabricated for the first time for sensitive detection of ACOP and 4-AP. S-CTFs@NiCo 2 O 4 modified electrode exhibited the outstanding synergetic effects of S-CTFs (prominent enrichment ability and large surface area) and NiCo 2 O 4 (excellent electrocatalytic activity). The developed electrode had the advantages of high reproducibility, repeatability, anti-interference and stability, and it exhibited a wide linear concentration range (2 ∼ 360 μM) and a low limit of detection (0.18 μM and 0.35 μM) for ACOP and 4-AP, respectively. In addition, the designed electrochemical sensor was evaluated towards the detecting ACOP and 4-AP in real samples with satisfactory recovery, illustrating that electrode has a broad prospect in the clinical application.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Yongqiang Ren,Xiuyan Li,Yinan Wang,Qinghua Gong,Shaonan Gu,Tingting Gao,Xuefeng Sun,Guowei Zhou
Hollow ternary metal oxides have shown enormous potential in lithium-ion batteries (LIBs), which is ascribed to their complex chemical composition, abundant active defect sites, and the synergy effect between metals. In this work, we synthesized Mo-doped NiCo 2 O 4 porous spheres with yolk-shell structure by using a simple self-templating method. Surprisingly, other than the yolk-shell structure we had obtained, the inner core of the yolk-shell was also porous, which could fully enhance the electrolyte infiltration and promote the transmission of lithium ions (Li + ) and electrons (e − ). The diameter of the porous core in the yolk-shell sphere was about 530 nm, and the outer shell's thickness was up to 110 nm. In addition, the unique pores in the core appeared in the diameter of about 85 nm. With this structure, the volume expansion of the anode could be well inhibited during charge/discharge. It exhibited prominent electrochemical performance with high reversible capacity (1338 mA h g −1 at 100 mA g −1 ), satisfactory cycle life (1360 mA h g −1 after 200 cycles at 100 mA g −1 ), and exceptional rate capability (820 mA h g −1 at 2000 mA g −1 ) as anode material in LIBs.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liang Chai,Yiqun Wang,Zirui Jia,Zhixin Liu,Shiyi Zhou,Qinchuan He,Haiying Du,Guanglei Wu
Micromorphology of absorbent materials has always been one of the important parameters of microwave absorption performance. The adjustment of morphologic and structure can effectively enhance absorbing performance. In this work, hierarchical dandelion-like NiCo 2 O 4 (HDNCO) is prepared by solvothermal method and calcination. The effects of Ostwald ripening process on structure, morphology and absorbing performance are studied. The results indicate that structure and morphology of HDNCO have a significant effect on the absorption performance. Due to the special morphology and structure of HDNCO, the impedance matching can be improved. When Ostwald ripening process is 2 h, the reflection loss (RL) value reaches −45.08 dB at 2.1 mm, and the effective absorption bandwidth (EAB) is 3.06 GHz. Moreover, the EAB of HDNCO with Ostwald ripening time of 6 h reaches 3.68 GHz at only 1.0 mm and the EAB of HDNCO with Ostwald ripening time of 9 h is 5.78 GHz at 2.2 mm. The Ostwald ripening process changes the structure and morphology of HDNCO, which leads to improve the absorbing properties. Thus, this work has important guiding significance for the structural design of high-performance microwave absorber.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Weiting Yu,He Jiang,Jinhui Fang,Shuang Song
Reducing the Pd loading on electrodes is critical in the electrocatalytic hydrodechlorination (EHDC) of chlorinated organic compounds (COCs). The EHDC reaction of COCs on Pd involves three steps: H* formation, H* adsorption, and dechlorination. It has been established that the initial hydrogen evolution reaction (HER) occurs on Pd0 and the dechlorination steps occur on Pd2+. A strategy is proposed to design new electrodes by adding a reducible HER-active interlayer to replace Pd0, fulfilling the responsibility of producing hydrogen, and to facilitate the formation of more Pd2+ for following C–Cl bond cleavage. Keeping the atomic hydrogen adsorption energy on the Pd/interlayer similar to that on pure Pd is also necessary for H* adsorption as well as to maintain a high EHDC activity. For the first time, the NiCo2O4-interlayer-modified Pd/Ni-foam electrode was applied in the EHDC of COCs, which enhanced the EHDC efficiency to 100% within 90 min and reduced 88.6% of Pd consumption. The Pd/NiCo2O4/Ni-foam electrode with enhanced EHDC activity was also observed with almost 100% product selectivity and good stability. A synergistic mechanism is proposed for the enhanced EHDC activity on the Pd/NiCo2O4/Ni-foam. This work offers a simple and useful strategy to design robust electrocatalysts for the EHDC of COCs.
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Journal of Cleaner Production
·
2021
·
IF 9.297
Wenning Yang,Jia Li,Yangsai Lyu,Xiaohui Yan,Ping Yang,Min Zuo
Artificial self-propelled micro/nano-motors have emerged as a promising hot spot in the fields of water-body remediation and environmental protection. Herein, we report a novel multifunctional micromotors with dual enzyme-like activities for simultaneous colorimetric determination and removal of environmental contaminants. Thanks to the tubular morphology inherited from kapok fibers, these bovine serum albumin-functionalized NiCo 2 O 4 @MnO 2 /C (BSA-NiCo 2 O 4 @MnO 2 /C) micromotors with dual oxidase/peroxidase-like activity can move forward quickly in aqueous solutions via a bubble recoil mechanism, which can not only enhance the colorimetric sensing performance, but also improve the removal efficiency toward Cu 2+ ion by enhancing the mass transfer both in the detection and catalytic degradation systems. Moreover, the unique 3D hierarchical architecture assembled by core-shell NiCo 2 O 4 @MnO 2 nanosheets and C microtubes can provide more accessible reactive sites and thus dramatically facilitate such detection process. In combination with the autonomous motility, intrinsic oxidase/peroxidase-like activities and precisely tuned hierarchical architecture, these automatic micromachines not only are able to detect Cu 2+ selectively and sensitively with the limit of detection of 2.0 nM, but also quickly remove Cu 2+ from wastewater with maximal adsorption capacity of 161.8 mg g −1 . Furthermore, these micromotors exhibit excellent catalytic activity for the degradation of tetracycline hydrochloride. This multifunctional mobile platform will provide a new and promising strategy for the simultaneous detection and decontamination of poisonous metal ions and other pollutants in aqueous samples.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 14
·5982-5993
·
IF 3.553
Zhang Kai,Wang Qiguan,Thota Apparao,Zhang Wenzhi,Chen Jian,Wang Yan,Wu Xinming,Wang Sumin
Atomic doping is considered as an effective method to prepare high-active conductivity-improved electrochemical materials. We report the utilization of a three-dimensional hierarchical porous nitrogen-doped carbon–NiCo 2 O 4 /CC as the flexible supercapacitor electrodes and recycled biosensor. In a hydrothermal process, three-dimensional hierarchical needle-like NiCo 2 O 4 /CC arrays were prepared by one-step, which changed to the mulberry-like morphology after in situ deposition of polyaniline nanoparticles on NiCo 2 O 4 /CC. Upon polyaniline carbonization at high temperature, the resulting porous nitrogen-doped carbon–NiCo 2 O 4 showed uniform nanorod networks and dramatic improvements in the electrolyte affinity, penetration and ionic motion. The obtained electrodes display good flexibility and large areal specific capacitance of 3.0 F cm −2 (2520 F g −1 ) at the current density of 1.0 mA cm −2 , with energy density of 171.5 Wh kg −1 and power density of 1118.4 W kg −1 . After 10000 cycles, the capacitance retention rate reaches 90.79%. The prepared NiCo 2 O 4 -based composites display design novelty and promising applications in the flexible supercapacitors with large capacitance and high stability.
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RSC Advances
·
2020
·Vol. 10
·期 41
·24705-24711
·
IF 3.119
Bo-Cai Liu,Shao-Li Chen,Xiao-Yu Ling,Qiao-Xian Li,Chang-Wei Xu,Zi-Li Liu
Spinel oxide NiCo2O4 supported on a three-dimensional hierarchically porous graphene-like carbon (3D HPG) material has been firstly used to enhance the activity of Pt for glycerol electrooxidation. The addition of NiCo2O4 into the Pt/HPG catalyst can significantly improve the catalytic performance for glycerol oxidation. When NiCo2O4 is added to the Pt/HPG catalyst, the onset potential is 25 mV more negative than that on the Pt/HPG catalyst without NiCo2O4. The current density at −0.3 V on the Pt–NiCo2O4 (wt 10 : 1)/HPG electrode is 1.3 times higher than that on the Pt (30 wt%)/HPG electrode. The Pt–NiCo2O4 electrode presented in this work shows great potential as an electrocatalyst for glycerol electrooxidation in an alkaline medium.
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Food Analytical Methods
·
2023
·
IF 2.9
Shen Jinhui,Liu Juan,Yang Siyi,Yao Xin,Fa Huanbao,Hou Changjun,Yang Mei
This work established a novel nucleic acid aptamer sensor for the sensitive and selective detection of AFB1 (Aflatoxin B1), which has important implication for food safety. In a word, we synthesized MXene/MWCNTs/NiCo 2 O 4 composite nanomaterials to improve the sensitivity of the aptamer sensor. The surface of the composite nanomaterials was modified with PDA (poly dopamine) in order to immobilize the NH 2 -cDNA-aptamer complex on the electrode surface by the Schiff base reaction. Characterization of MXene/MWCNTs/NiCo 2 O 4 nanocomposites was carried by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Meanwhile, 4-carboxy-2,2,6,6-tetramethylpiperidine 1-oxyl free radical (TEMPO-COOH) was used as an electrochemical signal to detect AFB1. Under optimal conditions, the electrochemical DPV signal decreased with increasing AFB1 concentration, ranging from 2.5 to 200 ng/mL, and the lowest limit of detection (LOD) at 1.890 ng/mL (S/N = 3). In addition, the ensemble sensor showed great reproducibility, stability, and selectivity, which has been successfully applied to the determination of AFB1 in maize flour and maize residue samples with recoveries in the 92.2 ~ 109.8% range. Compared to other detection methods for AFB1, this approach afforded comparable detection limits and detection ranges, in reduced analysis time (within 5 min). Thus, a time-saving, sensitive, and selective approach was achieved for the rapid determination of AFB1 in food.
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Small
·
2019
·Vol. 15
·期 42
·1903297
·
IF 10.856
Xiaofeng Zhang,Xiaocui Li,Ruchun Li,Yang Lu,Shuqin Song,Yi Wang
Developing highly efficient electrocatalysts with earth abundant elements for oxygen evolution reaction (OER) is a promising way to store light or electrical energy in the form of chemical energy. Here, a new type of electrocatalyst with core–shell carbon/NiCo 2 O 4 double microtubes architecture is successfully synthesized through a hydrothermal method combined with the calcination process with wet tissues as the template and carbon resource. The outer NiCo 2 O 4 nanosheet arrays contain abundant defects, which come from reduction of the carbon in wet tissues. This indicates that carbon is a very excellent defect inducer. The inner carbon microtubes can act as the robust structure skeleton and these core–shell double microtubes provide abundant diffusion channels for oxygen and electrolyte, both of which contribute to improving the stability by avoiding damage to the electrode from produced O 2 bubbles and the collapse of the outer NiCo 2 O 4 microtubes. Electrochemical results show that the electrode, core–shell carbon/NiCo 2 O 4 double microtubes loaded on carbon cloth, exhibits prominent electrocatalytic activity with an overpotential of only 168 mV at 10 mA cm −2 and a Tafel slope as low as 57.6 mV dec −1 in 1.0 mol L −1 KOH. This new type of electrocatalyst possesses great potential in water electrolyzers and rechargeable metal–air batteries.
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VACUUM
·
2024
·
IF 3.8
Fengjuan Miao,Honggang Wang,Xiaoqin Li,Bairui Tao,Hui Li
To develop materials that can meet the sensing and capacitive performance of glucose. Hydrothermal and electroplating procedures were used to prepare linear NiCo 2 O 4 and nano-CuO particles, respectively. The sensor's sensitivity was 1174.57 μA mM −1 cm −1 , with a low detection limit of 0.024 μM (S/N = 3), and its detection range was 0.3–12.6 mM, with good stability as verified using an electrochemical workstation. In addition, at a current density of 2 A g −1 , this material exhibits a specific capacitance of up to 2140.0F g −1 in supercapacitors. After 5000 cycles, its stability remained at 93.89 %. Similarly, asymmetric supercapacitor devices based on nickel foam exhibit A high specific capacitance of 605.5 F g −1 at a current density of 2 A g −1 . It is demonstrated that linear NiCo 2 O 4 modified with CuO nanoparticles can be employed not only as a sensitive material for glucose sensors but also for the production of supercapacitors.
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