APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shundong Guan,Tianshi Wang,Xiuli Fu,Li-Zhen Fan,Zhijian Peng
Layered SnS 2 has attracted extensive attention as promising anode material for sodium-ion storage owing to its high theoretical specific capacity. However, the practical performance is always hindered by its inferior rate capability and severe capacity fading. Herein, a novel coherent SnS 2 /NiS 2 hetero-nanosheet arrays on carbon cloth (SnS 2 /NiS 2 @CC) is fabricated through a facile one-step solvothermal method by controlling the synchronous growth of SnS 2 and NiS 2 . Benefiting from the strong coupling effect between SnS 2 and NiS 2 , and thus the markedly elevated electrical conductivity and charge transfer rate for sodiation/desodiation reaction, such composite exhibits significantly enhanced performance than its pure SnS 2 counterpart as the anode for sodium-ion battery, presenting a high reversible capacity (909.2 mA h g −1 of the fifth cycle at 200 mA g −1 ), excellent rate capability (360 mA h g −1 at 5 A g −1 ) and satisfying cycling stability (588.9 and 343.2 mA h g −1 at 0.5 and 2 A g −1 after 100 cycles, respectively). Moreover, the measured Na + diffusion coefficient for such SnS 2 /NiS 2 @CC electrode is almost two orders of magnitude higher than that of pure SnS 2 @CC. Such heterogeneous structuring for enhancing the rate performance could offer an effectively alternative way for the development of advanced electrode materials for energy storage devices.
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
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xuyan Qin,Wutao Wei,Ximin Ling,Changwei Shan,Zhao Liu,Mingjie Song,Zhikai Wang,Xi Jia,Liwei Mi
The design of a simple and safe method for constructing heterojunction structures in nanocomposites is a promising strategy for the manufacture of high-performance electrochemical energy storage devices. In this paper, based on the “less-liquid” reaction system and the assistance of the generated NaCl, a heterojunction-containing zero-dimensional (0 D) CoS2/NiS2 nanocomposite with particle sizes ranging from 50 to 200 nm were prepared. During this reaction, the reactant carries crystalline water to provide a liquid environment. Similarly, the lattice occupation of the generated NaCl promotes the construction of a large number of heterogeneous structures inside the nanostructured materials. The prepared material was subsequently employed as a cathode material for the Mg2+/Li+ hybrid battery (MLHB). The interface effect of the heterostructures induces an electric field within the nanocrystals, resulting in a lower ion diffusion resistance, and facilitating interfacial electron transport. Therefore, the heterojunctions accelerated the diffusion dynamics at the interface, and increased the charge-transfer rate. Mg2+ and Li+ exhibit reversible synergistic effects. More specifically, at a current density of 0.2 A g–1, the initial discharge specific capacity was 785.5 mAh g–1, while at a current density of 0.5 A g–1, a discharge specific capacity of 317.54 mAh g–1 was maintained over 200 cycles. And the Coulombic efficiency was maintained at ∼99.8%. This simple and safe design method for nanoscale heterogeneous materials provides a method for developing high-performance MLHB cathode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Shumin Wang,Yi Zhang,Xiaoyang Deng,Zizai Ma,Hefeng Yuan,Jinping Li,Xiaoguang Wang
The development of non-precious and high-efficient electrocatalysts to enhance the activity and stability in alkaline media is impending for massive hydrogen and oxygen production. In this study, NiS 2 nanoparticles array with ellipse-like topography was fabricated via simple hydrothermal and sulfurization treatment. The NiS 2 -400 featured with the unique loose stacking topographic architecture contributes to more exposed active sites, the smaller contact resistance between electrode/electrolyte, faster ion diffusion and electron transfer . As a result, NiS 2 -400 electrode requires only overpotentials of 116 and 178 mV to drive current densities of 10 and 50 mA cm −2 in 1.0 M KOH towards the hydrogen evolution reaction (HER), coupled with a Tafel slope of 93.0 mV dec −1 . Moreover, the resultant NiS 2 -400 nanoparticles exhibit excellent electrochemical stability for more than 50 h. In addition, the density functional theory (DFT) calculation further confirms that the (200) facet acts as the predominant active site, contributing to the enhanced HER performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Changdi Wang,Tingting Ji,Wenqian Luan,Dong Yao,Ruiyang Zhao,Jishu Han,Lei Wang
The high efficient utilization of light absorption and the effective separation of photogenerated carriers are critical factors in enhancing the performance of photocatalysts. In this study, CoNi-layered double hydroxide was synthesized using zeolitic imidazolate frameworks-67 as a template, followed by calcination to form CoS 2 /NiS 2 . Subsequently, ReS 2 was deposited onto the surface of CoS 2 /NiS 2 , resulting in the ReS 2 /CoS 2 /NiS 2 photocatalyst demonstrated notable hydrogen evolution activity under visible light, achieving a maximum hydrogen production rate of 40111.8 μmol/g. The construction of the Z-scheme heterojunction was found to facilitate the transfer and separation of photogenerated carriers while extending the lifetime of photogenerated electrons, thereby contributing to the enhancement of photocatalytic activity. This study provides a new approach for the development of sulfide heterojunctions aimed at improving photocatalytic hydrogen production efficiency.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Xiaohuan Meng,Haiping Liu,Liuyan Ji,Wenxiu Gao,Sifu Bi,Shanshan Fan,Chen Yang,Lixin Cao
As one of the main components of the cathode and electrolyte for Li thermal batteries (LTBs), conventional binders typically employ high thermal stability MgO to maintain LTBs structure stability, but MgO has the disadvantage of high resistance, which can result in a high resistance at the cathode-electrolyte interface. Thus, it is crucial to optimize the cathode-electrolyte interface for NiS 2 to achieve high performance LTBs. Herein, Li 7 La 3 Zr 2 O 12 (LLZO) with high thermal stability and excellent ionic conductivity was adopted in the cathode and electrolyte to replace the conventional binders, aiming to build a low resistance interface between the cathode and electrolyte, promoting the Li + transport kinetics. More importantly, LLZO also plays a vital role in reducing molten salt leakage and enhancing the stability of the cathode-electrolyte interface in LTBs, which contributed to increasing the discharge capacity of the NiS 2 cathode material. Consequently, LTB containing LLZO delivers a high discharge specific capacity of 635.1 mAh g −1 with a cut off voltage of 1.4 V at 100 mA cm −2 at 500 °C, retaining 72.8 % of the theoretical capacity of NiS 2 , which is 25.5 % higher than LTB with MgO. These findings indicate that optimizing the NiS 2 electrode and LLZO electrolyte interface would be an effective way to enhance the performance of LTBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
Yutong Li,Tianyi Dai,Quanxuan Wu,Xingyou Lang,Lijun Zhao,Qing Jiang
NiFe layered double hydroxide (LDH)-based materials arouse great attention because of their outstanding catalytic activity for oxygen evolution reaction (OER) under alkaline conditions. However, its catalytic activity for hydrogen evolution reaction (HER) under alkaline conditions is relatively poor. Herein, to improve the HER catalytic activity of NiFe LDH under alkaline conditions, we design a heterostructure of NiS and NiS 2 on NiFe LDH and successfully achieve Mo element doping . The catalyst named NiFe-LDH@Mo–NiS–NiS 2 /NF possesses a three-dimensional nano-flower-like structure and shows an outstanding catalytic performance for both HER and OER. Specifically, in 1 M KOH solution, it requires the low overpotentials of 261 and 120 mV to achieve the current density of 50 and 10 mA cm −2 for OER and HER, respectively. Simultaneously, when NiFe-LDH@Mo–NiS 2 –NiS/NF is used as the bifunctional catalysts, it only needs a low voltage of 1.63 V to achieve a current density of 10 mA cm −2 . The outstanding catalytic performance is attributed to its special heterostructure and the synergy between Mo and NiS x , resulting in comparability with most reported non-noble metal-based catalysts. The doping of metal elements and the construction of heterostructures provide new ideas for the structure regulation and performance improvement of bifunctional electrocatalysts .
研究领域:
材料科学
·
电催化
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 6
·期 14
·3764-3773
·
IF 3.975
Hui Liu,Hao Guo,Liguo Yue,Ning Wu,Qi Li,Wenqin Yao,Rui Xue,Mingyue Wang,Wu Yang
Graphical Turn the red light on : A series of NiS 2 /CoS 2 /NC- T composited is developed by carbonizing and sulfuring a binary precursor of Ni/Co-metal-organic framework. The composite NiS 2 /CoS 2 /NC-500 maintains the rod-like structure of the precursor and exhibits a high specific capacitance. An assembled asymmetric supercapacitor (ASC) NiS 2 /CoS 2 /NC-500//AC displays a high energy density and good cycle stability with high capacitance retention. A red LED can be illuminated by the assembled ASC. Transition metal sulfides derived from metal-organic frameworks (MOFs) have received increasing attention as a potential energy storage electrode material. Here, a series of NiS 2 /CoS 2 /NC- T ( T =temperature) have been successfully constructed by carbonizing and sulfuring the precursor of Ni/Co-MOF. It is worth emphasizing that N-doped carbon materials improve the conductivity of the electrode material. Moreover, NiS 2 /CoS 2 /NC-500 maintains the rod-like structure of the precursor and exhibits a high specific capacitance of 1325 F g −1 at a current density of 1 A g −1 . Apart from high capacitance, the NiS 2 /CoS 2 /NC-500 also demonstrated excellent cycling stability with retention rate of 75 % after 5000 cycles at a current density of 5 A g −1 . The good performance could be attributed to the unique rod-like structure and pore-size distribution of NiS 2 /CoS 2 /NC-500. Moreover, an assembled asymmetric supercapacitor NiS 2 /CoS 2 /NC-500//AC displays a high energy density of 53.93 Wh kg −1 at a power density of 800 W kg −1 and good cycle stability with capacitance retention of 85.71 % after 20,000 cycles at 5 A g −1 . In particular, a red LED can be illuminated by the assembled ASC, indicating that as-synthesized NiS 2 /CoS 2 /NC-500 hold great potential for practical applications.
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
RSC Advances
·
2023
·Vol. 13
·期 9
·5900-5907
·
IF 3.9
Suxing Luo,Meizhi Yang,Jiang Li,Yuanhui Wu
Conventional nanomaterials are available in electrochemical glucose nonenzymatic sensing, but their broad applications are limited due to their high cost and complicated preparation procedures. In this study, NiS–NiS2/sludge-based biochar/GCE was fabricated by one-step potentiostatic electrodeposition on biochar and used as an interface material for non-enzymatic sensing of glucose in 0.1 M NaOH. With an electrodeposition time of 300 s, the as-prepared sensors delivered the best electrochemical performance toward glucose due to the synergistic effects of NiS–NiS2 and sludge-based biochar. The as prepared NiS–NiS2/sludge-based biochar surface morphology, surface composition, and electrochemical properties were characterized by SEM elemental mapping, XPS and cyclic voltammetry. Under optimized conditions, the linearity between the current response and the glucose concentration has been obtained in the range of 5–1500 μM with a detection limit of 1.5 μM. More importantly, the fabricated sensor was successfully utilized to measure glucose in serum of sweetened beverages and human blood. Accordingly, NiS–NiS2/sludge-based biochar/GCE can hopefully be applied as a normal enzyme-free glucose sensor with excellent properties of sensitivity, reproducibility, stability, as well as sustainability.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Liangyu Tong,Chenyu Song,Yunpeng Liu,Ruimin Xing,Karthi Sekar,Shanhu Liu
Hierarchical hybrid heterostructures are regarded to be promising materials for highly efficient bifunctional electrocatalysts and high-performance supercapacitors due to their intriguing morphological features and remarkable electrochemical properties . Herein, we demonstrate the rational construct of cost-effective MoO x @NiS 2 hybrid nanostructures as bifunctional electrocatalysts and the electrode material of supercapacitor . Microstructural analysis shows that the hybrid is a kind of hierarchical heterostructure composed of open and porous NiS 2 nanowrinkles in situ grown on non-stoichiometric MoO x nanorods , which greatly improves the conductivity, and effectively maximized the electrochemical surface area. As expected, the MoO x @NiS 2 hybrid show remarkable electrocatalytic performance in alkaline media , such as overpotentials of 101 mV at 10 mA cm −2 for hydrogen evolution reaction (HER) and 278 mV at 20 mA cm −2 for oxygen evolution reaction (OER), and a low cell voltage of 1.62 V to deliver a current density of 10 mA cm −2 . Moreover, the hybrid nanostructures present a high specific capacitance 1050 A/g at 1 A/g with ultra-long stability in 6 M KOH. The strategy proposed here introduces a new perspective about the development of efficient earth-abundant bifunctional elecrocatalysts and electrode materials for superior energy conversion and 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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yajun Lu,Feng Ma,Jiayao Mao,Haoran Zhang,Jiaxin Wang,Xingtao Liu,Xiaohui Ren,Rongsheng Chen
Nickel iron layered double hydroxide (LDH) with low cost and high catalytic activity in oxygen evolution reaction (OER) has attracted tremendous research interests. In this work, we report a NiS 2 /FeS 2 -decorated Ni-Fe-LDH catalyst (Ni-Fe-LDH/Li 2 S 8 -140) synthesized through a sulfidation treatment of Ni-Fe-LDH. The lithium polysulfide (Li 2 S x , x = 4, 6, 8) was employed as the sulfur source to treat the Ni-Fe-LDH for the first time. The NiS 2 and FeS 2 in the obtained Ni-Fe-LDH/Li 2 S 8 -140 can adjust the valence state of the Ni and Fe, increase the amount of oxygen vacancies (Vo) and improve the OER kinetics. The Ni-Fe-LDH/Li 2 S 8 -140 shows an overpotential of 246 mV at 10 mA cm −2 in alkaline electrolytes with a low Tafel slope of 39.89 mV dec −1 . The Ni-Fe-LDH/Li 2 S 8 -140 can deliver a constant potential without large variation for over 165 h at 20 mA cm −2 . It is interesting that the Ni-Fe-LDH/Li 2 S 8 -140 transformed from aggregated nanosheets to long nanowires after duration test. However, the Ni-Fe-LDH still remains the particle morphology after duration test. This structure evolution possibly induced by the NiS 2 and FeS 2 which may facilitate the charge transfer and benefit the electrolyte penetration can explain the higher stability of Ni-Fe-LDH/Li 2 S 8 -140 than that of Ni-Fe-LDH. Besides, the Ni-Fe-LDH/Li 2 S 8 -140 was also employed as the anode catalyst for a two-electrode electrolyzer which maintains an output voltage of ca. 1.8 V for over 40 h under the continuous current density of 50 mA cm −2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Y. Chen,M. Yang,Y. Jia,P. Yan,F. Chen,J. Qian,L. Xu,H. Li
Photoelectrochemical (PEC) aptasensor based on photoactive species with remarkable and stable PEC response is a rising analytical method to implement highly efficient and sensitive detection of residual antibiotics in the field of food. Herein, NiS 2 /NiFe-layered double/graphitic carbon nitride (NiS 2 /NiFe LDH/g-C 3 N 4 ) ternary heterostructure designed by the surface vulcanization of flower-like NiFe LDH/g-C 3 N 4 was used for developing a label-free PEC aptasensing platform to detect enrofloxacin (ENR). The introduction of NiS 2 with narrow bandgap can strengthen the light harvesting of solar energy, producing large amounts of photoinduced carriers. NiS 2 as the electrons conduction bridge further accelerates the transmission efficiency of electrons in contrast to binary heterojunction, endowing ternary heterostructure with superior photocurrent signal. A label-free PEC aptasensor detected ENR with an amplified detection signal because of the oxidation of ENR molecules by photoinduced holes. This PEC aptasensing platform of ENR manifested a wide detection range from 3.6 × 10 −7 to 30 ng/mL with a low detection limit of 1.2 × 10 −7 ng/mL as well as can provide a sensitive and stable analysis with feasible application to monitor milk and honey samples. This design can open the utilization of ternary heterostructure by surface vulcanization to improve the sensitivity of PEC aptasensing platform for monitoring environmental pollutants.
研究领域:
分析化学
·
食品科学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Liangyu Tong,Yunpeng Liu,Chenyu Song,Yuqing Zhang,Sanjay S. Latthe,Shanhu Liu,Ruimin Xing
Hollow hybrid heterostructures are regarded to be promising materials as bifunctional electrocatalysts for highly efficient water electrolysis due to their intriguing morphological features and remarkable electrochemical properties . Herein, with FeNi-PBA as both a precursor and morphological template, we demonstrate the rational construct of cost-effective (Fe,Ni)S 2 @MoS 2 /NiS 2 hollow hybrid heterostructures as bifunctional electrocatalysts for alkaline overall water splitting. Microstructural analysis shows that the hybrid is a kind of hierarchical heterostructure composed of MoS 2 /NiS 2 nanosheets/nanoparticles in situ grown on hollow (Fe,Ni)S 2 nanocubes with abundant heterointerfaces, which effectively maximizes the electrochemical active sites to the accessible electrolyte ions , leading to the promoted charge transfer. As expected, the hybrid shows remarkable alkaline electrocatalytic performance, such as hydrogen evolution overpotential of 176 mV and oxygen evolution overpotential of 342 mV at 50 mA cm −2 , as well a cell voltage of 1.65 V at 20 mA cm −2 . Moreover, the stability and durability are greatly enhanced under harsh electrochemical conditions. This study opens a new venue for developing earth-abundant bifunctional electrocatalysts with hollow hybrid heterostructures for alkaline water electrolysis in the future.
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）