IONICS
·
2022
·Vol. 28
·期 6
·2979-2989
·
IF 2.961
Qi Jiqiu,Gu Huwei,Ruan Chenya,Zhu Lei,Meng Qingkun,Sui Yanwei,Feng Xiujuan,Wei Wenqing,Zhang Hao
MXene, an emerging 2D material, has aroused great concern in the field of supercapacitors owing to its charming properties. However, the relatively low specific capacitance of pristine MXene is unsatisfactory, which is caused by the restacking issue of MXene nanosheets. In this paper, a facile and cost-effective electrostatic self-assembly followed by hydrothermal method was adopted to prepare NiCo 2 S 4 decorated multilayer MXene nanosheets (MXene/NiCo 2 S 4 ). The introduced NiCo 2 S 4 effectively alleviates the self-restacking of MXene nanosheet and facilitates ion accessibility. Hence, the as-prepared MXene/NiCo 2 S 4 electrode displays a maximum specific capacitance of 1211.1 F g −1 at 1 A g −1 , surpassing the NiCo 2 S 4 electrode (938.4 F g −1 at 1 A g −1 ) and pure MXene electrode (84.2 F g −1 at 1 A g −1 ). The assembled asymmetrical supercapacitor utilizing hybrid MXene/NiCo 2 S 4 and RGO delivers a high energy density of 38.7 Wh kg −1 and high power density of 6137 W kg −1 . This work can provide a reliable reference for the synthesis of hybrid MXene/sulfide electrodes with ideal electrochemical performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 26
·12686-12695
·
IF 3.925
Haoyu Jiao,Tingting Feng,Shu Zhang,Mengqiang Wu
The demand for power density has promoted the application of supercapacitors, and one hot study task for supercapacitors is high-energy-density electrode materials, such as transition metal oxides or sulfides. Here, composites of ZnCo2O4/NiCo2S4 (ZCO/NCS) nanosheet arrays on hydrophilic carbon cloth were synthesized and were used in high-performance supercapacitors. The ZCO/NCS composite electrodes were obtained via electrochemical deposition using a mixed solution of MOF-drived ZCO nanoclusters and Ni, Co, S sources. It was found that the acid etching pretreatment for 20 min of the ZIF-8/67 templates would lead to better electrochemical performance of the derived product (labeled as ZCO-20) and the composites with NCS (labeled as ZCO-20/NCS) as well. The effects of deposition conditions on the morphologies and electrochemical properties of the ZCO/NCS products were also investigated. The results showed that the ZCO-20/NCS deposited at −0.9 V for 10 min exhibited a high specific capacitance (2385 F g−1 at 1 A g−1) and excellent rate retention (1868 F g−1 at 10 A g−1, and 990 F g−1 even at 50 A g−1). Further, ZCO-20/NCS was used to assemble a quasi-solid-state asymmetric supercapacitor (ASC) with activated carbon (AC) and PVA/KOH gel electrolyte. ZCO-20/NCS//AC ASC showed a good specific capacitance (161 F g−1 at 1 A g−1 and 131 F g−1 at 10 A g−1), high energy density (57.28 W h kg−1 at 1 A g−1 and 46.50 W h kg−1 at 10 A g−1), high power density (8.0 kW kg−1 at 10 A g−1) and good cycle retention (91.5% after 5000 cycles). Thereby, ZCO-20/NCS could serve as a promising supercapacitor electrode material 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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Kai Wu,Renqian Jiang,Yulong Zhao,Liang Mao,Xiuquan Gu,Xiaoyan Cai,Mingshan Zhu
Exploring low-cost co-catalyst to ameliorate the photocatalytic activity of semiconductors sets a clear direction for solving energy crisis and achieving efficient solar-chemical energy conversion. In this work, a unique hierarchical hollow heterojunction was constructed by in-situ growing ZnIn 2 S 4 nanosheets on the porous NiCo 2 S 4 hollow prisms through a low temperature solvothermal method, in which NiCo 2 S 4 with semi-metal property acted as non-noble metal co-catalyst. NiCo 2 S 4 co-catalyst was innovatively encapsulated in ZnIn 2 S 4 , which not only relieved the light shielding effect caused by the large loading amount of co-catalyst, but also supplied abundant active sites for H 2 evolution. The hierarchical hollow heterostructure of NiCo 2 S 4 /ZnIn 2 S 4 provided a highly efficient channel for charge transfer. Combining these advantages, NiCo 2 S 4 /ZnIn 2 S 4 composite demonstrated excellent photocatalytic activity. In the absence of sacrificial agent, the NiCo 2 S 4 /ZnIn 2 S 4 photocatalyst achieved a remarkable improved H 2 yield of 0.77 mmol g − 1 h −1 under visible light irradiation (λ > 400 nm), which is 6.6 times greater than that of ZnIn 2 S 4 . Besides, NiCo 2 S 4 even exhibited better performance on the H 2 evolution improvement of ZnIn 2 S 4 than precious metal Pt. This work will offer novel insights into the reasonable design of non-noble metal photocatalysts with respectable activity for water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 36
·1-12
·
IF 2.8
Yang Huiyuan,Guo Rongshuo,Jin Linghua,Zhang Ye,Wang Weike
The design and fabrication of transition metal sulfides for supercapacitors have attracted considerable attention in recent years because of their potential for energy storage applications. Conventionally, the synthesis process involved subjecting them to high temperatures and pressures, which can be energy-intensive and environmentally unfriendly. Herein, microcrystalline NiCo 2 S 4 nanorods were prepared under ambient temperature and pressure using a two-step method. The Ni 1/3 Co 2/3 C 2 O 4 nanorods were initially synthesized using the coprecipitation technique, and then the NiCo 2 S 4 nanorods were obtained by sulfurating Ni 1/3 Co 2/3 C 2 O 4 with Na 2 S·9H 2 O under ambient conditions. The NiCo 2 S 4 as a high-performance supercapacitor electrode has been demonstrated. The results exhibited that the prepared NiCo 2 S 4 electrodes have low charge transfer resistance, and a high specific capacitance of 1330.0 F g −1 at a current density of 1.0 A g −1 . Furthermore, a hybrid supercapacitor was assembled using activated carbon (AC) as the anode material and NiCo 2 S 4 nanorods as the cathode material, and the resulting NiCo 2 S 4 //AC device exhibits an impressive energy density of 27.1 Wh kg −1 at a power density of 1.6 kW kg −1 . This work demonstrates a vision for fabricating a microcrystalline NiCo 2 S 4 cathode under ambient temperature and pressure for hybrid supercapacitors.
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
Coatings
·
2024
·Vol. 14
·期 12
·1492
·
IF 2.9
Shumeng Qin,Ruofan Xu,Qiu Jin,Sen Wang,Yi Ren,Yulin Huang,Ziye Zheng,Lihui Xiao,Dong Zhai,Shuguang Wang,Zuoli He
For typical Cr(VI)-containing industrial wastewater, more efficient water treatment technologies need to be used to ensure that Cr(VI) concentrations are reduced to safe levels before discharge. Photocatalytic technology is highly efficient, environmentally friendly, and has been extensively used to address this demand. Herein, heterogeneous NiCo2S4/BiOBr photocatalysts with different ratios were prepared using a solvothermal method. When compared with pure NiCo2S4and BiOBr, the NiCo2S4/BiOBr-30 had significantly increased adsorption capacity and visible-light-driven photocatalytic reduction activity for Cr(VI) removal. The improved adsorption performance of the NiCo2S4/BiOBr-30 was mainly due to its increased specific surface area, and the enhanced photocatalytic performance of the NiCo2S4/BiOBr-30 could be attributed to the improved separation and transfer of photogenerated carriers at the interface. Lastly, a possible enhanced photocatalytic Cr(VI) reduction mechanism of the NiCo2S4/BiOBr heterostructure was developed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Jun Wang,Jiangting Wang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Jian Zhang,Kunpeng Jiang,Aibing Yu
In this work, to reduce the “dead volume” due to the accumulation of synthesized products, the foam-structured NiCo 2 S 4 (FSNCS) with a specific surface area of 25.4 m 2 g − 1 was successfully synthesized by using well-dispersed SiO 2 nanospheres as the framework. The FSNCS exhibited 559.3 C g − 1 at a current density of 1 A g − 1 , which was 173.3 C g − 1 higher than the performance of the NCS synthesized without the addition of SiO 2 . Additionally, a hybrid supercapacitor is successfully assembled with FSNCS as the positive electrode and active carbon (AC) as the negative electrode. The FSNCS//AC displays maximum specific energy of 28.8 Wh kg −1 at a specific power of 375.0 W kg −1 , together with good cyclic life with 88.9% capacity retention over 5000 cycles at 8 A g − 1 . It is worth noting that the hybrid supercapacitor can provide strong power for the operation of the motor fan. The simple structure design provides an innovative and effective way to develop high-performance energy storage devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Can Zhou,Meng Li,Junjie Ding,Hui Wang,Yi Zhao,Zixu Huang,Leqing Fan,Guijing Liu,Changmei Sun,Wenlong Xu
In recent years, the concept of sustainable development has encouraged the development and application of green, natural, and recyclable energy storage devices. Herein, using Ni(NO 3 ) 2 0.6 H 2 O and Co(NO 3 ) 2 0.6 H 2 O as raw material and K 2 S 2 O 8 as a vulcanizing agent, NiCo 2 S 4 nanomaterials@C 3 N 4 (NCS@C 3 N 4 ) composite was prepared by a one-step solvothermal method, in which the introduction of C 3 N 4 significantly improves the dispersion of NCS , while the petal-like NCS also expands the layer spacing of C 3 N 4 , which effectively alleviates the structural instability and promotes the exposure of stable active sites during charge and discharge. Physical structure and electrochemical characterizations showed that the NCS were distributed on the surface of the C 3 N 4 nanosheets , which reduced the stacking of the nanosheets and accelerated the charge transfer during the charging and discharging process. The specific capacity ( C sp ) of the NCS@C 3 N 4 composite electrode was up to 890.4 C/g at a current density of 1 A/g. In addition, the supercapacitor consisting of NCS@C 3 N 4 composite electrode had good cycling stability and still displayed excellent capacitance retention after 3000 cycles. The NCS@C 3 N 4 composite greatly optimizes the stability and extends the operating life of supercapacitors, which has a broad application potential in the field of 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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chenxuan Wang,Xinyi Ma,Zhongyuan Fu,Xiaoyun Hu,Jun Fan,Enzhou Liu
A twinned Mn 0.5 Cd 0.5 S ( T -MCS) homojunction, consisting of wurtzite and zinc-blende Mn 0.5 Cd 0.5 S with different energy band structures, was fabricated using a facile hydrothermal method, resulting in the formation of a type-II bulk phase twinned homojunction. Furthermore, NiCo 2 S 4 nanoparticles were deposited on the surface of T -MCS to form a surface heterojunction. The activities of T -MCS and NiCo 2 S 4 / T -MCS were tested in the photocatalytic H 2 evolution reaction. T -MCS exhibits a superior H 2 evolution rate of 61.4 mmol∙g −1 ∙h −1 under visible light (λ > 420 nm) irradiation owing to faster bulk phase charge separation, which is 8.2 and 1.9 times higher than those of wurtzite and zinc-blende Mn 0.5 Cd 0.5 S, respectively. Moreover, NiCo 2 S 4 can facilitate interfacial electron transfer and can lower the H 2 evolution overpotential; the H 2 evolution rate is boosted to 127.3 mmol∙ g −1 ∙h −1 with an apparent quantum yield (AQY) of 23.4% with irradiation of 2 wt%-NiCo 2 S 4 / T -MCS under 400 ± 7.5 nm light. This work demonstrates that bulk phase twinned homojunctions and a surface heterojunction can combine to promote bulk and interfacial charge transfer and separation, simultaneously improving the kinetics of photocatalytic H 2 evolution.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 38
·25919-25926
·
IF 4.123
Junwen Peng,Junli Xu,Zhaoyu Wang,Zhengxin Ding,Sibo Wang
Developing efficient alternatives to the widely used Pt cocatalyst in photocatalytic H2O splitting is of great importance in view of large-scale production of clear H2 energy. Herein, we report the facile synthesis of NiCo2S4 and its first use as a highly active and cost-affordable cocatalyst to boost visible light H2 generation with the CdS semiconductor. The synthesized NiCo2S4/CdS composite materials are fully characterized by various techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-Vis diffusion reflectance spectroscopy (DRS), and N2 adsorption measurements. With the optimized NiCo2S4/CdS composite sample, a high H2 generation rate of 137 μmol h−1 is obtained under visible light irradiation, which is more than 17 times higher than that of bare CdS material. The results of photoluminescence (PL) spectroscopy, transient photocurrent response and electrochemical impedance spectroscopy demonstrate the remarkably promoted migration and separation of photogenerated charge carriers over the heterostructured NiCo2S4/CdS material, thus leading to obviously enhanced photocatalytic performance. Moreover, a possible mechanism for the photocatalytic H2 evolution reaction is also proposed based on the observed results of activity evaluation and photoelectrochemical measurements.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-7
·
IF 5.228
Li Delong,Gong Youning,Pan Chunxu
In this work, a novel carbon nanotubes (CNTs)/NiCo 2 S 4 composite for high performance supercapacitors was prepared via a simple chemical bath deposition combined with a post-anion exchange reaction. The morphologies and phase structures of the composites were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS) and low-temperature sorption of nitrogen (BET). The electro-chemical tests revealed that the CNT/NiCo 2 S 4 composite exhibited high electrochemical performance, because the CNTs were used as a conductive network for the NiCo 2 S 4 hexagonal nanoplates. Compared with pure NiCo 2 S 4 and the mechanically mixed CNTs/NiCo 2 S 4 composite, the CNTs/NiCo 2 S 4 composite electrode material exhibited excellent supercapacitive performance, such as a high specific capacitance up to 1537 F/g (discharge current density of 1 A/g) and an outstanding rate capability of 78.1% retention as the discharge current density increased to 100 A/g. It is therefore expected to be a promising alternative material in the area of energy storage.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xing Chen,Haijun Tao,Yinhua Jiang,Shishi Li,Yuxin Liu,Kun Xie,Yuqiao Wang
P-doped S vacancy-rich NiCo 2 S 4 hollow microspheres (P-NiCo 2 S 4-x HMSs) were prepared by hydrothermal, sulfuration, and phosphorization methods. P doping and S vacancy dual defects can be simultaneously obtained during the phosphorization process. The dual defects can modulate the electron structure and create abundant electrochemical sites, boosting electron transfer and reaction kinetics. Theoretical calculations illustrated that the dual defects could reduce the adsorption energy of OH − and Mulliken charges of Ni atoms, in favor of OH − adsorption. The hollow construction can increase the specific surface area, promote ion diffusion, and alleviate the volume variation during charge/discharge processes. The specific capacity and rate capability of the P-NiCo 2 S 4-x HMSs electrode can reach up to 1146.0 C g −1 at 1 A g −1 and 61.8 % at 30 A g −1 , respectively. The P-NiCo 2 S 4-x HMSs electrode exhibited remarkable cycling stability with a 79.5 % capacity retention after 20,000 consecutive charge/discharge cycles. The assembled P-NiCo 2 S 4-x //AC hybrid supercapacitor manifested an infusive energy density of 62.7 Wh kg −1 at 867 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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ziling Zhu,Jiabao Yan,Mingxi Wang,Hui Zhu,Xuanke Li,Ling Wu
Developing a highly efficient heterogeneous catalyst for activating peroxymonosulfate (PMS) in the degradation of persistent organic pollutants (POPs) remains a challenge, and transition bimetallic sulfide is considered a promising candidate. Herein, a hydrangea-like NiCo 2 S 4 was designed for activating PMS in the removal of a typical POP (atrazine, ATZ), and the activation mechanism of the catalyst was elucidated. The hydrangea-like NiCo 2 S 4 was successfully synthesized through sulfide ion-exchange with its oxide counterpart (NiCo 2 O 4 ), showing much more excellent catalytic performance in activating PMS than NiCo 2 O 4 for the degradation of ATZ. The ATZ (46 μM) degradation efficiency ( R D ) in the NiCo 2 S 4 /PMS system (40 mg L −1 catalyst and 0.4 mM PMS) achieves nearly 100 % within 10 min with an apparent rate constant ( k ) of 0.583 min −1 , superior to those of NiCo 2 O 4 /PMS system with values of R D = 26.7 % and k = 0.033 min −1 . The role of sulfur species was uncovered and the origin of the exceptional catalytic performance of NiCo 2 S 4 was disclosed through various techniques. The results demonstrated that sulfur species not only accelerated electron transfer but also promoted the regeneration of reactive sites by facilitating the conversion of Co 3+ /Ni 3+ to Co 2+ /Ni 2+ . More reactive oxygen species (ROSs), including sulfate radical (SO 4 •− ), hydroxyl radical ( • OH), superoxide radical (O 2 •− ) and singlet oxygen ( 1 O 2 ) were produced for attacking ATZ molecules, leading to their degradation into the intermediates with reduced toxicity.
研究领域:
环境科学
·
催化化学
✓ 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）