FOOD CHEMISTRY
·
2023
·
IF 8.8
Xin Tang,Shan Zhao,Jiaying Wu,Zhiyuan He,Yu Zhang,Ke Huang,Zhirong Zou,Xiaoli Xiong
It is necessary to efficient detection hydrazine in food . Exploring highly sensitive, low-cost and fast response electrochemical hydrazine sensing methods has been a challenge in this field. In this paper, a conformal transformation method is used to prepare rose flower-like NiCo-LDH derivating from the bimetallic NiCo-MOFs, and the N 2 H 4 sensing platform with a large electrocatalytic area, high conductivity and good stability was constructed. Based on the synergy between Ni and Co and the remarkable catalytic activity of the rough 3D flower-like structure, the N 2 H 4 sensor has a linear response in the concentration range of 0.001–1 mmol/L and 1–7 mmol/L, with a sensitivity of 5342 μA L mmol −1 cm −2 and 2965 μA L mmol −1 cm −2 (S/N = 3), respectively, and low limit of detection of 0.043 μmol/L. This study opens a new door for the successful application of electrochemical sensors to detect N 2 H 4 in real food samples.
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DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yu-Gang Fu,Yi-Han Li,Qiu-Feng Lü
Nickel‑cobalt layered double hydroxide (NiCo-LDH) has received much attention in the field of supercapacitor electrodes due to its multiple oxidation states and good electrochemical activity. However, NiCo-LDH often suffers from structural instability and low conductivity in practical applications. In this study, sea urchin-like structural NiCo-LDH coated cobalt‑nitrogen co-doped carbon (NiCo-LDH@Co-NC-x) electrode materials were prepared by in situ growth of NiCo-LDH on the surface of cobalt‑nitrogen co-doped carbon nanosheets (Co-NC) using a one-step hydrothermal method. The results show that the NiCo-LDH@Co-NC-2 electrode material exhibits excellent electrochemical performance, its specific capacitance is up to 1909 F g −1 at a current density of 1 A g −1 , and capacitance retention of 69.5 % (only 26.2 % for NiCo-LDH) can be achieved after 10,000 cycles at a current density of 10 A g −1 . This is because the abundant and uniformly distributed Co nanoparticles on Co-NC provide nucleation sites for the in-situ growth of NiCo-LDH, effectively improving the interface binding between Co-NC and NiCo-LDH, enhancing the structural stability of NiCo-LDH, and ensuring highly efficient electron transport throughout the NiCo-LDH@Co-NC-2 electrode. An asymmetric supercapacitor (NiCo-LDH@Co-NC-2//AC) was further assembled with NiCo-LDH@Co-NC-2 and activated carbon (AC) as positive and negative electrodes, respectively, achieving an energy density as high as 36.8 Wh kg −1 at a power density of 750 W kg −1 . These findings suggest that the NiCo-LDH@Co-NC-2 composite can be a promising candidate for high-performance supercapacitor electrode.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hong Jia,Mengyang Wang,Mengyao Feng,Guangzhi Li,Longhua Li,Yu Liu
Constructing heterostructures with nanotube arrays not only provides rich ion electron pathways to promote rapid Faraday reactions, but also enhances interfacial electron transfer, supplying larger capacitance and rapid energy storage. Herein, NiCo-layered double hydroxide (LDH)/NiCo 2 S 4 nanotube arrays decorated with black phosphorus quantum dots (BPQD) is prepared through solvothermal method and electrostatic adsorption. In the unique structure, tubular structure of NiCo-LDH/NiCo 2 S 4 /BPQD nanoarrays on carbon cloth can expose sufficient redox reaction active sites and multiple ion diffusion channels to promote rapid faradic reactions. Density functional theory (DFT) theoretical calculations further confirm the enhancement of conductivity and OH – adsorption in ternary composite materials. The as-obtained NiCo-LDH/NiCo 2 S 4 /BPQD achieves an ultra-high capacitance of 2938.2F g −1 at 1.0 A g −1 . Finally, an asymmetric supercapacitor consists of activated carbon and NiCo-LDH/NiCo 2 S 4 /BPQD exhibits a satisfactory energy density of 133.7 Wh kg −1 at 800 W kg −1 . In addition, after 10,000 repetitions of charging/discharging, the capacitance still remains 76.5 %. Above results suggest that NiCo-LDH/NiCo 2 S 4 /BPQD electrode may facilitate the further development of hierarchical array structure electrodes in the energy storage field.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Liuxu Wei,Yupeng Wang,Ruihan Gao,Jiapei Liu,Qi Zhang,Jun Xing,Xiaodan Xia,Zhenyu Xiao,Lei Wang
Although layered double hydroxides (LDHs) provide structural advantages for alkaline zinc-ion battery (AZIB) cathodes via their inherent layered architecture, their intrinsic low electrical conductivity and anisotropic ion transport limits charge transfer kinetics. A Ksp -regulated electrochemical etching strategy is first proposed to solve this challenge by exploiting the dramatic solubility difference between BaSO 4 and Co/NiSO 4 . The thermodynamic selectivity enables the precise construction of BaSO 4 nanodot-anchored NiCo-LDH heterostructures (BS@CN-LDH) within a rapid minute-scale process, achieving atomic-level control over heterointerface architecture. Density functional theory (DFT) calculations coupled with UPS analysis reveal a strong built-in electric field (BEF) at the heterointerface (ΔΦ = 0.70 eV), driving interfacial charge redistribution of 0.013 e from NiCo-LDH to BaSO 4 . The optimized BS@CN-LDH electrode material exhibits a high specific capacity of 450.5 mAh g −1 at a current density of 2 mA cm −2 , maintaining 83.3% excellent cycling stability after 10 000 cycles. Moreover, the as-fabricated BS@CN-LDH//rGO-Zn AAZB cell achieves a record energy density of 747.9 Wh kg −1 at a power density of 0.27 kW kg −1 , surpassing most reported zinc-based energy storage devices. This Ksp -regulated etching strategy provides critical insights into electric field engineering of heterostructured materials to resolve the persistent electron/ions transfer kinetics for dramatically increased energy storage performance.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhichao Jiao,Yuanqing Chen,Miao Du,Muslum Demir,Fuxue Yan,Weimin Xia,Ying Zhang,Cheng Wang,Mengmeng Gu,Xiaoxuan Zhang,Juntao Zou
The research on the structure of advanced electrode materials is significant in the field of supercapacitors . Herein, for the first time, we propose a novel 3D/3D composite structure by a multi-step process, in which 3D hollow NiCo LDH nanocages are immobilized on 3D sea urchin-like CoO microspheres . Results show that the 3D CoO acts as an efficient and stable channel for ion diffusion, while the hollow NiCo LDH provides abundant redox-active sites. The calculated results based on density function theory (DFT) show that the CoO@NiCo LDH heterostructure has an enhanced density of states (DOS) near the Fermi level and strong adsorption capacity for OH − , indicating its excellent electrical conductivity and electrochemical reaction kinetics. As a result, the CoO@NiCo LDH electrode has an areal specific capacity of 4.71C cm −2 at a current density of 3 mA cm −2 (440.19C g −1 at 0.28 A g −1 ) and can still maintain 88.76 % of the initial capacitance after 5000 cycles. In addition, the assembled hybrid supercapacitor has an energy density of 5.59 mWh cm −3 at 39.54 mW cm −3 .
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DOI
高影响因子
Carbon Neutralization
·
2025
·Vol. 4
·期 6
·e70069
·
IF 12
Lisha Liu,Mingyuan Gao,Mengwei Guo,Rongrong Deng,Cunying Xu,Yan Li,Juanjian Ru,Yixin Hua,Qibo Zhang
The development of layered double hydroxides (LDHs) has been hindered by the mismatch between their rate capability and areal capacity at ultrahigh mass loadings. Herein, we address this issue by designing NiCo-LDH/NiCoOOH composite films with an open-pore nanosheet structure. These films are fabricated using a ChCl-urea based deep eutectic solvent (DES) additive-assisted electrodeposition method followed by electrochemical activation, and confined on each graphene nanolayer of a 2D hierarchical expanded graphene paper (EGP) substrate. This design facilitates rapid charge transport and ion diffusion, enhancing active material utilization. The DES additive induces lower crystallinity and more disordered lattices with vacancies in the composite films, strengthening the synergistic effect with the EGP interface. Consequently, the films achieve high areal capacities of 3.4 mAh cm −2 at 23 mg cm −2 mass loading (84.1% rate capability) and a record 16.6 mAh cm −2 at ultrahigh 100 mg cm −2 mass loading (58.4% rate capability, GP thickness 0.15 mm). We also elucidate the relationship between GP substrate thickness and electrochemical performance. The resulting asymmetric supercapacitor delivers an ultrahigh energy density of 6.4 mWh cm −2 and power density of 64 mW cm −2 . This study provides new insights into constructing high-mass-loading energy storage materials through microstructure regulation and interface engineering for practical applications.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chi Zhang,Zhixiao Zhu,Yanke Zhang,Weixuan Shao,Di Wu,Guannan Peng,Zhengchun Liu
In-plane micro-supercapacitors (IMSCs) have greater promise for use in flexible wearable electronics than traditional stacked configurations due to their ease of integration and conformability. Nickel-cobalt layered double hydroxide (NiCo-LDH) has garnered significant interest as a stellar material for supercapacitors because of its affordable price, regular morphology, and high theoretical capacity. Unfortunately, the intrinsic poor conductivity of LDH materials prevents supercapacitors from achieving long-term stable cycling and the desired energy density. This research successfully applies the self-templated approach to prepare carbon nanotubes (CNTs) with heterogeneous architectures and numerous phase interfaces, thereby mitigating this disadvantage. Carbon nanosheets adorned with WO 2 and MoO 2 nanoparticles assemble the CNT with a typical three-dimensional structure. When combined with LDH in a suitable ratio, the composite electrode’s conductivity significantly improves, providing increased capacity and cycling stability. Compared to commercial CNTs , the larger size of the prepared WO 2 /MoO 2 @P, N-CNTs serves a superior supporting and connecting role, thereby preventing the NiCo-LDH from aggregating. Under the best conditions, the composite electrode demonstrates a capacity of 1237 C/g at 1 A g −1 and an optimal capacity retention of more than 92%. For the IMSC devices, the composite materials as the positive electrode achieve an energy density of 0.0590 mWh cm −2 , and no capacity degradation is observed after 10,000 cycles. In addition, bending tests have demonstrated the mechanical stability of the IMSCs. Therefore, this strategy of mixing highly conductive WO 2 /MoO 2 @P, N-CNTs can effectively improve the conductivity of the composite material and the mechanical properties of the overall device. Furthermore, this concept can be further extended to the preparation and application of other wearable devices.
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DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xin Xu,Shang Wu,Xin Sun,Shuo Tian,Chaoyang Liu,Penghui Zhang,Shuaishuai Fu,Yanbin Wang,Qiong Su,Xia Wang,Quanlu Yang
The rectangular nanorods microstructure with abundant pores can reduce structural damage caused by the volume contraction during charging-discharging processes and enhance the specific capacitance. In this work, to enhance the energy density and accelerate the marketable applications of supercapacitors , Bi 2 O 3 /BiFeO 3 rectangular nanorods with rich mesoporous structure derived from the iron‑bismuth based Prussian blue analogue are rationally designed to achieve a large specific capacitance through precipitation and annealing measures. There are a huge specific capacity of 741 F g −1 and long cycle life. The NiCo-LDH/rGO (954 F g −1 ) demonstrated an impressive stability of 86 % after 10,000 cycles and is utilized to establish asymmetric supercapacitor device. Amazingly, the NiCo-LDH/rGO//Bi 2 O 3 /BiFeO 3 device achieves an enormous energy density of 59.7 Wh kg −1 at 800 W kg −1 . In addition, the capacity retention ratio is 79.3 % after 7000 cycles. The work has suggested that Bi 2 O 3 /BiFeO 3 has great potential as a negative electrode of supercapacitors.
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xin Tang,Yu Zhang,Jiaying Wu,Zhiyuan He,Yun Xing,Jie Yang,Zhirong Zou,Ke Huang,Huimin Yu,Xiaoli Xiong
In this work, a 3D ultra-thin NiCo-LDH nanosheet array coated Cu nanoparticles on carbon cloth (NiCo-LDH@Cu NSA/CC) was ultrafast synthesized by plasma magnetron sputtering for the first time. This method has low toxicity and is easy to operate. As a durable and efficient 3D heteronanoarray electrocatalyst for glucose detection, NiCo-LDH@Cu NSA/CC has higher stable conductivity and faster electron transport rate than NiCo-LDH NSA/CC and Cu nanoparticles, which work through synergistic effect to form a high-performance sensing platform. The NiCo-LDH@Cu NSA/CC heteronanosheet structure has good electrocatalytic performance for glucose oxidation, with the sensitivity of the two linear ranges (0.001–1 mmol L −1 and 1–6 mmol L −1 ) being 9710 μA L mmol −1 cm −2 and 4870 μA L mmol −1 cm −2 , respectively, and the detection limit (LOD) is 157 nmol L −1 (S/N = 3). The sensor has been successfully applied to detect glucose in beverages and serum.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xinyu Shan,Zuoxing Guo,Chao Zhang,Wenquan Wang,Lijun Zhao
It is a great challenge to develop freestanding ultralight cathodes for lithium–sulfur battery exhibiting good electrochemical performances. Herein, ultrathin porous nickel–cobalt layered double hydroxide (NiCo-LDH) nanosheets were grown on the surface of ultra-light nickel microwire aerogels (NMWAs), and there is capillary action in the gaps formed by the ordered arrangement due to the presence of magnetic filed in the preparation process, which has the advantages of synergistic adsorption and accelerated conversion kinetics of lithium polysulfide . Because of the abundant hydrophilic hydroxyl groups on the surface of NiCo-LDH and the capillary action of NMWAs, the integrated freestanding film cathode sulfur host (NMWAs@NiCo-LDH/S) provides excellent rate performance as well as cycling stability. The film cathode has an ultra-high initial specific capacity of 1238.4 mAh g −1 at 0.1C and an excellent reversible capacity of 805.8 mAh/g at 5.0C. Even after 700 cycles at a high current density of 5.0C, it still provides a reversible capacity of 647.1 mAh g −1 with a capacity decay rate of only 0.018 % per cycle. This work provides a simple and new way for the design of high rate lithium–sulfur battery film cathodes with good cycle stability.
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高影响因子
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