Surfaces and Interfaces
·
2021
·
IF 4.837
Chenya Ruan,Dongdong Zhu,Jiqiu Qi,Qingkun Meng,Fuxiang Wei,Yaojian Ren,Yanwei Sui,Hao Zhang
Bimetallic transition metal sulfides (TMSs) and MXene are the two kinds of promising candidates as electrode materials for supercapacitors based on different storage mechanisms. However, little work has been performed on their composites. In this paper, Ti 3 C 2 MXene-wrapped CoNi 2 S 4 nanotrees were synthesized controllably using flake ZIF-67 as precursor grown on nickel foam, which was transformed into dendrite CoNi 2 S 4 dendrite in MXene suspension (weak acidic environment). The formation mechanism of CoNi 2 S 4 dendrite was discussed. Ti 3 C 2 MXene-wrapped CoNi 2 S 4 nanotrees delivered very high specific capacity of 933 C g −1 at 1 A g −1 and good rate performance. This is due to that the unique dendrite morphology can provide many exposed electro-active sites and wrapped conductive MXene can facilitate the charge transfer. An asymmetric supercapacitor was assembled using CoNi 2 S 4 /MXene/NF and RGO as positive and negative electrodes, which delivered a high energy density of 30.5 Wh kg −1 without deteriorating its high power density (1587 W kg −1 ). This device can power the clock for 55 minutes, demonstrating its broad practical application potential.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 24
·8456-8465
·
IF 4
Qingfei Li,Nan Li,Mianmian Wu,Guifang Sun,Wenjing Shen,Minghao Shi,Jiangquan Ma
Stable and efficient bifunctional electrocatalysts are of great significance for sustainable energy conversion and human society sustainability. However, conventional electrocatalytic materials tend to exhibit high overpotentials and unsatisfactory chemical activities. Herein, we construct novel CoNi2S4/C3N4 nanowires on a nickel foam (NF) electrode as a bifunctional electrocatalyst for alkaline water splitting by a two-step hydrothermal and thermal annealing process. The prepared CoNi2S4/C3N4 electrocatalyst exhibits superior HER (e.g. 40 mV (ηH210)) and OER (e.g. 110 mV (ηO210)) activities in a 1 M KOH electrolyte, which are much smaller than those of bare NF, Co@NF, NiCoO@NF and most reported materials. Furthermore, the stability test at 10 mA cm−2 for 20 h for the CoNi2S4/C3N4 electrocatalyst shows no obvious decay and proves the excellent stability of CoNi2S4/C3N4. In this work, the unique tentacle-like CoNi2S4/C3N4 nanowire nanostructure leads to minimized interfacial resistance and abundant channels during electrocatalysis. Moreover, comprehensive analysis results show that Ni(Co)OOH active sites, which are beneficial for excellent OER activity, partially form on the surface of CoNi2S4/C3N4 during electrocatalysis. Finally, the CoNi2S4/C3N4∥CoNi2S4/C3N4 two-electrode system is constructed and it exhibits a low-voltage water splitting capability of 1.40 V.
研究领域:
材料科学
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电化学
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能源转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2018
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IF 3.525
Jingwei Li,Qiuna Zhuang,Peiman Xu,Dawei Zhang,Licheng Wei,Dingsheng Yuan
Designing low-cost, highly efficient, and stable bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of vital significance for water splitting. Herein, three-dimensional lily-like CoNi 2 S 4 supported on nickel foam (CoNi 2 S 4 /Ni) has been fabricated by sulfuration of the Co–Ni precursor. As expected, CoNi 2 S 4 /Ni possesses such outstanding electrocatalytic properties that it requires an overpotential of only 54 mV at 10 mA cm −2 and 328 mV at 100 mA cm −2 for HER and OER, respectively. Furthermore, by utilizing the CoNi 2 S 4 /Ni electrodes as bifunctional electrocatalysts for overall water splitting, a current density of 10 mA cm −2 can be obtained at a voltage of only 1.56 V.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Yingbo Song,Dedong Sun,Xinyu Jiang,Huanran Ma,Chun Ma,Jun Hao,Xinxin Zhang
The activation of peroxymonosulfate (PMS) with bimetallic spinel sulfides to degrade refractory organic pollutants is a promising method. In this work, a one-step hydrothermal method was used to synthesize high catalytic activity CoNi 2 S 4 . Catalyst CoNi 2 S 4 was characterized by X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT-IR) and field-emission scanning electron microscopy (SEM). Subsequently, CoNi 2 S 4 was applied to activate PMS for Rhodamine B (RhB) degradation. After 50 mins of catalytic reaction , the removal rate of RhB (20 mg/L) reached 99.1% and the removal rate of COD reached 60.0% in the CoNi 2 S 4 (150 mg/L) + PMS (150 mg/L) system at room temperature of 20 ℃. The experiment results showed that the CoNi 2 S 4 had preeminent catalytic activity. The singlet oxygen ( 1 O 2 ) and sulfate radical (SO 4 •− ) were proved to perform critical roles in the catalytic degradation process by electron paramagnetic resonance (EPR) analysis and quenching experiment. Meantime, the potential catalytic mechanism of PMS activation by CoNi 2 S 4 was proposed mainly in two aspects: one is that S 2 2- and S 2- species promote the Co 3+ /Co 2+ and Ni 3+ /Ni 2+ cycles on CoNi 2 S 4 surface, and the other is that there is the synergistic effect of Co-Ni cycles for PMS activation by CoNi 2 S 4 . Recycling tests showed that the degradation efficiency of RhB was stable, indicating that CoNi 2 S 4 had good recyclability . Because of its outstanding catalytic activity, easy preparation, and reusability, the CoNi 2 S 4 catalyst has broad application prospects in the field of controlling water pollution .
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
·
2025
·Vol. 11
·期 3
·83
·
IF 4.8
Yongli Tong,Baoqian Chi,Yu Jiang,Xiang Wu
It is crucial for energy storage devices to construct electrode materials with excellent performance. However, enhancing energy density and cycling stability for supercapacitors is a significant challenge. We successfully synthesized CoNi2S4@Ni(OH)2nanosheets on the surface of Ni foam substrate by a two-step hydrothermal approach. The obtained products exhibit a remarkable areal capacitance of 1534 F g−1at a current density of 1 A g−1. Moreover, even after 10,000 cycles, the specific capacitance remains 90% of its initial value, highlighting the exceptional long-term stability and durability. Furthermore, an asymmetric supercapacitor (ASC) device incorporating the CoNi2S4@Ni(OH)2material shows remarkable electrochemical performance. It delivers an energy density of 58.5 mW h g−1at a power density of 2700 W kg−1. The outstanding performance mainly arises from the selection of materials, the design of the structure, and the synergistic interaction between the materials. The result suggests that this material holds great potential as an energy storage material.
研究领域:
材料科学
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能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Qianglong Chen,Ruibin Guo,Yangyang Jiang,Li li,Wenjing Qin,Yanchun Tan,Nijuan Liu,Zunli Mo
Three-dimensional amorphous silver lug-like CoNi 2 S 4 electrode materials have been designed and synthesised by the sacrificial template method. Through a clever combination of Ni 2+ induced template deficiency and sulphidation reactions, the rearrangement of the electronic structure can be promoted, generating more defects. The Ni element-doped electrode significantly improves the capacitance due to the bimetallic synergy and has a high mass specific capacitance of 1351 F g −1 at a current density of 4 A g −1 . The specific capacitance was 1111 F g −1 at a current density of 20 A g −1 , showing an excellent multiplicative performance (82.2%).
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Lidong Jiao,Mingshu Zhao,Zhou Su,Mangmang Shi,Min Li,Feng Li
Supercapacitors have received widespread attention from scientific researchers due to the advantages of high power density, fast charging/discharging rate and long cycle life. Among them, the development of high performance and high safety electrode materials are important research topics in the field of supercapacitors. Herein, zeolitic imidazolate framework (ZIF) derivatives is a good candidate material for supercapacitors electrode because of its controllable pore rate, constant cavity and larger specific area. However, the reunion phenomenon and the damaged structure during the reaction seriously affected its electrochemical properties, especially its stability. To solve this problem, the few-layer MXene was added into ZIF-67 to inhibit the reunion of single materials and the carbonization process was operated to improve its conductivity and structure stability. In addition, the CoNi 2 S 4 /carbon/MXene (CNS/C/MXene) obtained by the solvent thermal method successfully inherited the hollow cages structure and rough surface from the precursor, expressing a better electrochemical performance. In three-electrode system, the CNS/C/MXene electrode can exhibit the specific capacitance of 1221.6 F g −1 (169.7 mAh g −1 ) at 1 A g −1 and still maintain a high capacitance of 966.4 F g −1 (134.2 mAh g −1 ) at 20 A g −1 (79.1 % of the former). After assembling it with activated carbon into asymmetric supercapacitor, the device can provide a high energy density of 19.82 Wh kg −1 at a power density of 469.31 W kg −1 and maintain about 71.17 % of the initial capacitance after 30,000 cycles under a current density of 20 A g −1 , representing excellent cycle stability and rate capability.
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
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Weiji Dai,Kai Ren,Yin-an Zhu,Ye Pan,Jin Yu,Tao Lu
Efficient electrocatalysts based on earth-abundant elements are urgently required for promoting the efficiency of electrochemical water splitting. In this work, heterostructures of CoNi 2 S 4 /Ni 3 S 2 on nickel foam (CoNi 2 S 4 /Ni 3 S 2 @NF) are synthesized by a facile one-step hydrothermal method as promising bifunctional electrocatalysts. To achieve an electrocatalytic current density of 10 mA cm −2 in 1 M KOH solution, the CoNi 2 S 4 /Ni 3 S 2 @NF electrode requires overpotential as low as 171 mV and 243 mV for HER and OER , respectively. Furthermore, the overall water splitting device with CoNi 2 S 4 /Ni 3 S 2 @NF electrode as both cathode and anode requires 1.65 V to offer current density of 10 mA cm −2 . Density functional theory calculations reveal that the strong coupling interactions between CoNi 2 S 4 and Ni 3 S 2 synergistically optimized the electronic structure, thus enhancing the electrochemical water splitting performances. Surfaces oxidation of CoNi 2 S 4 /Ni 3 S 2 @NF electrode is considered to hinder the electrochemical activities for OER. The present work not only provides a promising bifunctional electrocatalyst for water splitting but also expands the applications of CoNi 2 S 4 based materials.
研究领域:
材料科学
·
电化学
·
能源化学
·
纳米催化
·
可持续能源
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Qinghua Wang,Feng Gao,Biyan Xu,Fuxian Cai,Fengping Zhan,Fei Gao,Qingxiang Wang
In this paper, unique amorphous bimetallic sulfides of CoNi 2 S 4 with nanocage structure were synthesized. The ZIF-67 with typical rhombic dodecahedron structure was first synthesized, and then the bimetallic product was achieved by the ingenious combination of Ni 2+ -induced template scarification of the synthesized ZIF-67 and the sulfuration reaction. The characterization assays showed that the CoNi 2 S 4 nanocages perfectly inherited the rhombic dodecahedral morphology of the ZIF-67, but with many vertical aligned nanosheets on the shell. The CoNi 2 S 4 nanocages were utilized as an electrode material for capacitance test. The results revealed that the synthesized CoNi 2 S 4 nanocages have low charge-transfer resistance, and high specific capacitance of 1890 F g −1 at a current density of 4 A g −1 . The specific capacitance remains 89.9% and 71.6%, respectively after 1000 and 5000 cycling charge-discharge measurements. This excellent performance can be ascribed to the amorphous nature, unique hollow nanocage structure and bimetallic composition of the product. Furthermore, an asymmetric supercapacitor was assembled using CoNi 2 S 4 nanocages as positive electrode materials and Yolk-Shell carbon spheres (YS-CS) as negative electrode materials, and the resulting CoNi 2 S 4 //YS-CS device exhibits a high energy density of 35 Wh kg −1 at a power density of 640 W kg −1 .
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 Energy Storage
·
2024
·
IF 8.9
Xinbiao Mao,Hongtao Guan,Jufeng Zhou,Wenwen Zhou,Xiaobei Shi,Xin Xu,Yunfang Gao
For supercapacitors (SCs), there is an urgent need to develop positive materials with excellent electrochemical performance. In this work, in-situ growth of series-connected CoNi 2 S 4 hollow nanocages derived from zeolitic imidazolate framework-67 (ZIF-67) and strung by carboxylated carbon nanotubes (C-CNTs) were successfully synthesized through a two-step ordered ion etching/exchange procedure. The special connection structure and synergistic effect between CoNi 2 S 4 nanocages and C-CNTs greatly improve the electrochemical performance of the hybrid (CoNi 2 S 4 /C-CNTs), in which porous CoNi 2 S 4 hollow nanocages offer electrochemical active sites and fast ion diffusion channels, while C-CNTs provide electron transport paths. The optimized hybrid, CoNi 2 S 4 /C-CNTs20, exhibits excellent electrochemical performance with a high specific capacity (1314.6C g −1 at 1 A g −1 ) and an impressive rate capability (72.1 % retention at 20 A g −1 ). Furthermore, the hybrid supercapacitor (HSC) using CoNi 2 S 4 /C-CNTs20 and active rice husk carbon (ARHC) as the positive and negative electrodes, respectively, demonstrates an outstanding energy density of 47.9 Wh kg −1 at a power density of 800 W kg −1 and remarkable cycling stability of 90 % at 5 A g −1 after 8500 cycles. Our work will open up a brand-new strategy to oriented design electrode materials for various energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 48
·485404
·
IF 3.953
Shang Wu,Xin Xu,Xiangtao Yan,Huanlei Zhao,Chaoyang Liu,Yanbin Wang,Qiong Su,Fenping Yin,Quanlu Yang
In this work, a mild chemical precipitation method and simple hydrothermal treatment of the nickel hexamyanocobaltate precursor strategy are developed to prepare a sea urchin-like CoNi2S4 compound with remarkable specific capacity and excellent cycling stability. The prepared CoNi2S4 has an outstanding specific capacity of 149.1 mA h g−1 at 1 A g−1 and an initial capacity of 83.1% after 3000 cycles at 10 A g−1. Moreover, the porous carbon nanospheres (PCNs) with exhibit cycling stability (94.7% of initial specific capacity after 10 000 cycles at 10 A g−1) are selected as negative electrode to match CoNi2S4 positive electrode for assembly of CoNi2S4//PCNs asymmetric supercapacitor (ASC). Satisfactorily, the as-assembled CoNi2S4//PCNs ASC exhibits an impressive energy density of 41.6 Wh kg−1 at 797 W kg−1, as well as the suitable capacity retention of 82.8% after 10 000 cycles. The superior properties of the device demonstrated that the as-prepared material is potential energy storage material.
研究领域:
材料科学
·
电化学能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Ziqing Yang,Xiaosi Qi,Chen Li,Qiqing Liang,Lei Wang,Junfei Ding,Yunpeng Qu,Xiu Gong,Wei Zhong
Interfacial polarization had a great impact on the attenuation of electromagnetic wave . To aggrandize interfacial polarization, a strategy of constructing the abundant interfaces was proposed and investigated. Herein, CoNi nanospheres , CoNi@SiO 2 nanospheres and core@shell CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like multicomponent nanocomposites (MCNCs) were elaborately designed and successfully fabricated through a simple continuous hydrothermal process, classical Stöber method and hydrothermal treatment . The obtained results demonstrated that the elaborately constructed abundant interfaces greatly boosted the polarization loss ability, which resulted in the enhanced interfacial polarization. Therefore, the as-prepared CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like MCNCs presented the superior electromagnetic wave absorption properties (EMWAPs) compared to the CoNi and CoNi@SiO 2 precursors. Furthermore, the EMWAPs of CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like MCNCs could also be further improved by optimizing the hydrothermal temperature and filler loading. The obtained CoNi 2 S 4 /Co 9 S 8 @SiO 2 @MoS 2 flower-like MCNCs presented the excellent comprehensive EMWAPs including strong absorption capability, broad absorption bandwidth and thin matching thickness, which could be attributed to the unique structure, excellent interfacial polarization and synergistic effect. Therefore, this finding not only demonstrated that introducing the abundant interfaces was an effective strategy to strengthen interfacial polarization for the promotion of EMWAPs, but also provided an alternative approach to exploit the novel high-efficiency microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）