JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Mao-Jin Ran,Meng Wang,Zhi-Yi Hu,Yi-Fu Huang,Lin-Dong Wang,Lu Wu,Man-Man Yuan,Jian Zhang,Bei Li,Gustaaf Van Tendeloo,Yu Li,Bao-Lian Su
Constructing heterojunctions have received significant attention in photocatalysis because of their efficient separation of photogenerated carriers and improving light utilization efficiency. Bimetallic sulfides (e.g. NiCo 2 S 4 ) are applied in electrocatalysis and supercapacitors that can be coupled with TiO 2 to form a heterojunction . Owing to the staggered energy band arrangement between TiO 2 and NiCo 2 S 4 , the establishing of a Z-scheme heterojunction between them is expected to enhance the carrier separation efficiency and reduce the sulfide photo-corrosion. However, the application of NiCo 2 S 4 in photocatalysis and studies on the mechanism of the TiO 2 /NiCo 2 S 4 Z-scheme heterojunction have seldom been reported. In this work, we obtained a hollow core-shell TiO 2 /NiCo 2 S 4 Z-scheme photocatalyst through a solvothermal method for photocatalytic hydrogen evolution (PHE). The PHE rate of the optimized TiO 2 /NiCo 2 S 4 -0.3 is 8.55 mmol g − 1 h − 1 , approximately 34 times higher than pure TiO 2 , 94 times higher than pure NiCo 2 S 4 . The remarkable photocatalytic activity can be ascribed to the hollow structure and the in-situ constructed Z-scheme heterojunction. The photogenerated charge transfer mechanism is revealed by hydroxyl radical trapping experiments and electron paramagnetic resonance (EPR) characterization. The in-situ construction of the Z-scheme heterojunction not only enhances the efficiency of separating the photogenerated carriers but also reduces the photo-corrosion of NiCo 2 S 4 . This study proposes an effective strategy for the design of TiO 2 -based Z-scheme heterojunctions and the application of NiCo 2 S 4 in photocatalysis .
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Shang Wu,Xin Xu,Xin Sun,Sheng Zhou,Chaoyang Liu,Penghui Zhang,Shuaishuai Fu,Hong Zhang,Shaofeng Pang,Xia Wang,Quanlu Yang
Metal organic framework (MOF) as an electrode material is still a great challenge due to inherent instability and poor electrical conductivity . Herein, we design a material rGO/NiCo 2 S 4 , which by using GO and metal organic framework (ZIF-67) as the template and precursor. Additionally, the presence of GO and ZIF-67 can increase specific surface area and provide active sites for redox reactions and shortens ion transport pathways. The synthesized of rGO-10/NiCo 2 S 4 has excellent electrochemical properties as electrode material, which has a high specific capacity of 171 mAh g −1 and 121.9 mAh g −1 (1 A g −1 and 10 A g −1 ). The as-obtained rGO-10/NiCo 2 S 4 //AC asymmetric supercapacitor (ASC) of power density is 870 W kg −1 when the specific energy 41 Wh kg −1 , and with 88.2 % capacitance retention after 5000 cycles at 5 A g −1 . Therefore, the rGO-10/NiCo 2 S 4 derived from ZIF-67 as electrode materials for high-performance asymmetric supercapacitors has a good prospect.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yue Liu,Dong Su,Zhiyuan Sang,Xiaohan Su,Han Chen,Xiao Yan
The rapid development of portable and wearable electronic devices requires novel energy storage devices. Flexible, high-performance electrode materials are critical for meeting the demands yet remain challenging. Here, a rationally designed flexible NiCo 2 S 4 @rGO/rGO film constructed with NiCo 2 S 4 @rGO frameworks is successfully prepared through a step-wise process (hydrothermal, freeze-drying, vacuum filtration, and then sulfurization/reduction). The NiCo 2 S 4 @rGO/rGO film as flexible electrode shows typical battery-type faradaic redox features and exhibits a high specific capacitance of 1100.0 F g −1 at 1 A g −1 , a good rate performance of 89.1% capacity retention at 10 A g −1 coupled with long cycling stability of 90.2% after 5000 cycles. The good electrochemical performance is mainly attributed to the loose layered structure and strong interaction between NiCo 2 S 4 and rGO nanosheets , which enhance the diffusion of electrolyte ions/electrons and decreases intrinsic resistance and contact resistance. A flexible hybrid supercapacitor assembled using the NiCo 2 S 4 @rGO/rGO film as cathode and the rGO film as anode shows a high energy density of 30.0 Wh kg −1 at a power density of 857.6 W kg −1 at an extended operating voltage of 1.8 V. The method can also be readily adapted for loading other bimetallic sulfides on rGO films, indicative of its feasibility and flexibility to prepare rGO-based hybrid film for high-performance flexible electrochemical energy storage .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Songyuan Wu,Jiaheng Wang,Linheng Zhao,Yulong Cao,Haoxiang Yang,Xiao Jing,Jiarui Li,Yang Zhao,Jiaxu Gong,Yatang Dai
The quest to achieve high energy density and superior stability in supercapacitors is both attractive and challenging. This work reports a simple method to grow CoTe/NiCo 2 S 4 composite electrode materials with core-shell structure. When used as a cathode material, the unique core-shell structure exhibits outstanding electrochemical characteristics, including a superior specific capacitance (1470.45 F g −1 at 1 A g −1 ), outstanding cycling stability (86.69 % after 5000 cycles), and impressive rate performance (77.17 % at 10 A g −1 ). Notably, the asymmetric hybrid supercapacitor constructed using CoTe/NiCo 2 S 4 as the cathode and AC/NF as the anode can provide an operating voltage of 1.8 V, achieving a peak energy density of 39.8 Wh kg −1 and a highest power density of 832 W kg −1 . Moreover, the supercapacitor demonstrates satisfactory rate performance (81.25 % at 10 A g −1 ) and excellent cycling stability (86.61 % after 8000 cycles). Furthermore, when assembled into a quasi-solid-state flexible supercapacitor, the device can support a small toy fan to run for 66 seconds, thereby highlighting its viability for practical energy storage applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 10
·期 4
·1056-1065
·
IF 5.726
Xiaoliang Guo,Zhiming Liu,Fang Liu,Jun Zhang,Lekai Zheng,Yongchuan Hu,Jing Mao,Hui Liu,Yanming Xue,Chengchun Tang
The development of efficient, stable and inexpensive electrochemical water-splitting catalysts for the hydrogen evolution reaction (HER) over a wide range of pH is of great importance for the production of hydrogen resource. Defect engineering with electronic structure modulation has been expected to be an effective strategy to enhance the electrocatalytic activity. Herein, Ni–Co bimetallic sulfide (NiCo2S4) nanosheet arrays with controlled sulfur vacancies have been developed by multiple vulcanization treatment of the Ni–Co hydroxide precursor for HER catalysis at all pH values. The presence of S vacancies has been identified by various characterization means, and their effects on the HER performance are well investigated. The obtained NiCo2S4 nanosheet arrays with optimal sulfur vacancy content exhibit the best HER performance in alkaline medium, only requiring an overpotential of 150 mA at −10 mA cm−2 with a Tafel slope of 82.5 mV dec−1, as well as excellent durability. Experimental results confirm that the high HER activity could be ascribed to the accelerated electron transfer and good intrinsic activity for the electrocatalyst with optimal S vacancies. These findings should provide a new vacancy modulation for traditional transition metal chalcogenides for the purpose of boosting the HER performance at all pH values.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2020
·Vol. 3
·期 3
·421-428
·
IF 0
Lei Zhang,Haitao Zhang,Xiang Chu,Fangyan Liu,Chunsheng Guo,Weiqing Yang
Although the synthesis of novel nanostructured metal sulfides has been well established, further size-controllable optimization is still valuable to enhance their performance for various applications. Herein, a self-template method to size-controllably synthesize the hollow NiCo 2 S 4 nanospheres is reported. Uniformly monodisperse NiCo precursors with diameter widely ranging from 97 to 550 nm are controllably synthesized and subsequently transformed into hollow NiCo 2 S 4 nanospheres through in situ sulfidation. Smaller nanoparticles' diameter results in the hollow NiCo 2 S 4 nanospheres larger surface area and thinner shell thickness and hence provides much more electrochemical active sites as well as facilitate the ion and electron transfer. Consequently, the hollow NiCo 2 S 4 nanospheres—used as the electrode materials in supercapacitors—achieve 19% enhancement of specific capacity from 484.8 to 575.1 C g −1 through lowering the 42.5% diameter of hollow NiCo 2 S 4 nanospheres from 407 to 234 nm. Moreover, the hollow NiCo 2 S 4 nanospheres with 234 nm diameter exhibit superior rate capacity indicated by 49% capacity retention from 1 to 50 A g −1 and excellent cycling stability (77% after 2000 cycles). Furthermore, this method is a potentially general strategy in the size-controllable synthesis of the metal sulfides hollow nanostructures and results in the remarkable electrochemical applications.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Ganwen Zhang,Junjie You,Qi Chen,Zhijin Xiong,Yourong Wang,Siqing Cheng
It is of unprecedented significance to surmount the daunting challenges of lithium-sulfur battery due to its low cost and exceptionally high energy density. Herein, the mesoporous NiCo 2 S 4 @rGO nanocomposites were fabricated solvothermally with mesoporous NiCo 2 S 4 nanoparticles dispersed on rGO and investigated as highly-efficient carriers for sulfur cathode in lithium-sulfur battery. The as-obtained NiCo 2 S 4 @rGO nanocomposites are featured with abundant mesopore, good electronic and ionic conductivity, excellent catalytic effect on the redox of lithium polysulfides conversion and strong adsorption, thus observably accelerating the redox kinetics of lithium polysulfides and suppressing the shuttle effect. Therefore, the NiCo 2 S 4 @rGO@S electrode delivers a high reversible specific discharge density of 785 mAh g −1 at 0.1 C after 100 cycles and exhibits good rate capability and cycling stability, verifying its great promising for the commercial application of lithium-sulfur battery.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Hao Wang,Qian Liu,Tingting Ji,Ruiyang Zhao,Lu Li,Jishu Han,Lei Wang
The construction of heterojunction is an effective and controllable method to improve the photocatalytic decomposition of water to produce hydrogen by semiconductor photocatalyst . In this paper, NiCo 2 S 4 yolk-shell nanospheres and Mn 0.8 Cd 0.2 S nanoparticles were synthesised by solvothermal and hydrothermal methods , and then Mn 0.8 Cd 0.2 S nanoparticles were loaded onto the surface of NiCo 2 S 4 to form a dense Z-scheme heterojunction . Without precious metals as cocatalysts, the maximum hydrogen production of the optimized Mn 0.8 Cd 0.2 S/NiCo 2 S 4 reached 21.41 mmol·g −1 ·h −1 . The morphology, structure and optical properties of the prepared samples were characterized, and the experimental results and theoretical calculations showed that Mn 0.8 Cd 0.2 S/NiCo 2 S 4 with Z-scheme heterojunction could improve the efficiency of photocatalytic hydrogen production by effectively transferring and separating the photogenerated electrons and holes.
研究领域:
材料科学
·
光催化
·
纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 42
·15162-15169
·
IF 4.39
Dandan Chu,Li Yan,Qiwen Chen,Xue-Qiang Chu,Danhua Ge,Xiaojun Chen
Hollow prism-like NiCo2S4 materials (NiCo2S4 HNPs) were successfully fabricated by a two-step method. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and powder X-ray diffraction (XRD) confirmed the morphology and structure of the as-prepared NiCo2S4 nanoprisms. A non-enzymatic sensor based on NiCo2S4 HNPs was constructed with outstanding electrochemical activity towards glucose oxidation in alkaline medium. The sensor showed a rapid response time (∼0.1 s), a high sensitivity of 82.9 μA mM−1 cm−2, a wide linear range (0.005–20.2 mM) and a detection limit of 0.8 μM (S/N = 3) with a good selectivity and reproducibility. Additionally, the proposed electrode also confirmed the feasibility in practical blood serum. These results indicate that NiCo2S4/ITO has great potential in the development of non-enzymatic glucose sensor applications.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xin Yu,Siran Xu,Xian Liu,Xiaohong Cheng,Yeshuang Du,Qi Wu
The development of self-supported nanosheet materials with porous multiple active sites has enormous potential for the application of oxygen evolution reaction (OER). Herein, we reported a three-dimensional (3D) porous nanosphere Mn-NiCo 2 S 4 /NF catalyst for OER. As a result, the simple Mn doping strategy results in good electrocatalytic performance and outstanding stability. During the OER, the Mn-NiCo 2 S 4 /NF only needs a small overpotential of 220 mV (40 mV lower than pure NiCo 2 S 4 /NF) to achieve the current density of 10 mA cm −2 , which is mainly due to a large number of exposed active sites and adequate pathways for mass diffusion and oxygen gas release. Moreover, Mn doping optimizes the electronic structure and thus facilitates electron transport , leading to superior electrocatalytic performance. The catalyst exhibits incredible corrosion resistance in 1 M KOH solution for 60 h or more. This work provides a valuable method to synthesize a low cost, high-efficiency, and corrosion resistant transition metal electrocatalyst for oxygen evolution using heteroatom doping strategy.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2021
·
IF 1.556
Qian Zhang,Renxia Zhu,Chenyu Zhao,Runze Fan,Yong Zhang,Yurong Cai
Application of lithium-sulfur battery has been limited due to polysulfide dissolution, the insulating nature of sulfur and the volumetric strain produced during charge and discharge process. To improve the performance of Li-S batteries, two kinds of bimetallic sulfides of NiCo 2 S 4 with flaky (F-NiCo 2 S 4 ) and sea urchin-like (S-NiCo 2 S 4 ) structures were synthesized by using simple hydrothermal method, which were used as sulfur carriers in lithium-sulfur batteries and showed excellent electrochemical properties. At 0.2 C, both electrodes of F-NiCo 2 S 4 /S and S-NiCo 2 S 4 /S have high pristine discharge specific capacities of 986 mAh g − 1 and 959 mAh g − 1 . At high current density of 4 C, the F-NiCo 2 S 4 /S electrode still has a high pristine discharge specific capacity of 673 mAh g − 1 and a coulombic efficiency of 97.00%. The specific capacity can remain at 526 mAh g − 1 with a low average attenuation of 0.17% even after 130 cycles. The excellent electrochemical performances of the cathode material can be ascribed to the synergistic effect of tubular morphology, good electrical conductivity and strong adsorption ability of NiCo 2 S 4 matrix for polysulfide. The job provides a new scheme and material for application of lithium-sulfur batteries with high performance.
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 ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qihang Chen,Zihao Huang,Wenna Zhao,Kai Tao,Guochang Li,Lei Han
Transition metal sulfides are gaining attention as a new highly capacitive active material for high-performance supercapacitors, however, it is still a challenge that synthesizes a distinctive structure to enhance the electrochemical characteristics and practical applications. In this work, hierarchical structural hybrid metal sulfides (NiCo 2 S 4 /Co 4 S 3 ) based on nanosheets and nanocages are synthesized by sulfurating the NiCo-LDH/ZIF-67 precursors. The NiCo 2 S 4 /Co 4 S 3 electrode with remarkable layered and porous structure effectively increase the electrochemical active surface area and accelerate the charge transfer, achieving a high specific capacitance of 8.43 F cm −2 at a current density of 2 mA cm −2 and good cyclic stability. An assembled asymmetric supercapacitor with activated carbon delivers a high energy density of 0.50 mWh cm −2 at a power density of 1.69 mW cm −2 . These results demonstrate that NiCo 2 S 4 /Co 4 S 3 is an ideal electrode material for high-performance electrochemical energy storage devices.
研究领域:
材料科学
·
电化学
✓ 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）