JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2018
·Vol. 165
·期 16
·A3642
·
IF 3.662
Qingzhou Wang,Yichun Wang,Xin Zhang,Gongkai Wang,Puguang Ji,Fuxing Yin
Sodium ion capacitors (SICs) represent a promising alternative of energy storage device with high energy/power densities as well as long life span. Exploration of novel anode materials with typically high rate performance is a shortcut to boost the performance of SICs. Here, we present a WSe2/reduced graphene oxide (rGO) nanocomposite synthesized by a home-made chemical vapor deposition (CVD) method. WSe2 nanoparticle is deposited uniformly at the surface of rGO nanosheets. The unique structure endows the composite with outstanding electrochemical properties. The specific capacity of 133.3 mAh g−1 at an ultrahigh current density of 60 A g−1 can be delivered. The sodium ion storage kinetics was investigated, exhibiting very high ratio of capacitive contribution during the sodium ion reaction process. The SICs based on the WSe2/rGO nanocomposite as anode show the maximum energy density of 42.8 W h kg−1 and maximum power density of 14.4 kW kg−1 as well as the superior cyclic stability, proving the promising of WSe2/rGO anode for SICs application.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
DESALINATION
·
2020
·
IF 7.098
Binglin Bai,Xiaohong Yang,Rui Tian,XuanXuan Wang,Haibo Wang
Solar steam generation has become the most promising solar-thermal applications in recent years. Scientists often focus on the search for superior materials, efficient structures, while ignoring the use of residual heat from the water at the bottom. In this paper, a membrane distillation system that utilizes residual heat was added in a new solar house of a domestic hot water and drinking water supply system in the first place. The pDA-rGO-PTFE membrane as an excellent evaporator was characterized in solar steam generation system, which possesses good hydrophilicity capacity and high intrinsic absorption properties . And at the optimal concentration of 20 mg/mL, the evaporation rate and efficiency of pDA-rGO-PTFE membrane could reach up 1.45 kg·m −2 ·h −1 and 93.8% respectively in one sun (one sun = 1kw·m −2 ). The PTFE membrane as a separator was applied in a membrane distillation system. Under average 0.66 sun in the natural environment, the average evaporation rate of a new solar house could reach about 1.10 kg·m −2 ·h −1 , and there is an additional 0.71 kg·m −2 ·h −1 membrane permeation flux by the residual heat. In addition, the new solar house showed an excellent durability and desalination ability, the ions rejection rations of the collected condensate water were close to 99.8%. Hence, we conclude that further ideas of a new solar house were provided for solving water scarcity, domestic water consumption and the application of solar steam generation in the future.
研究领域:
能源科学
·
环境工程
·
材料科学
·
可持续技术
·
水处理技术
✓ 已验证
DOI
高影响因子
Sustainable Energy Technologies and Assessments
·
2024
·
IF 7.1
Yuanyuan Zhang,Lu Wang,Dong Zhang
Structure supercapacitors (SSC) have aroused tremendous interest in building energy storage due to their dual function of electrochemical-mechanical properties. As well known, the low energy storage capacity limits their development. To enhance the energy density of SSC, lots of high-performance structural electrodes were developed. Herein, Mg and S elements were used to regulate the microstructure of the binary metal hydroxide, which could improve the electrode’s electrochemical performance. As we expected, rGO/N 1 C 3 Mg-S 4 ′ electrode exhibits high areal capacitance (10.20F/cm 2 ), which boosts the electrochemical capacitance of SSC. Our device based on rGO/N 1 C 3 Mg-S 4 ′ electrode exhibits a high areal capacitance (179.21 mF/cm 2 ) and a high energy density (56 μWh/cm 2 ) at 3 mA/cm 2 . More importantly, the electrochemical performance of our device doesn’t change obviously under a certain amount of pressure, demonstrating its good practical application potential in buildings.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 48
·24394-24402
·
IF 6.895
Yuhan Liu,Malin Li,Yingying Zheng,Hezhe Lin,Ziyang Wang,Wen Xin,Chunzhong Wang,Fei Du
Potassium-ion batteries (PIBs) are considered a promising alternative to lithium-ion batteries (LIBs) for next-generation energy storage due to the abundance and competitive cost of potassium resources. However, the excavation and the development of proper electrodes for PIBs are still confronted with great challenges. Herein, a self-assembled bismuth sulfide microsphere wrapped with reduced graphene oxide was fabricated to form a heterostructured Bi2S3@RGO composite via a visible-light-assisted method and served as the anode for PIBs. The as-prepared Bi2S3@RGO composite presented a high reversible specific capacity of 538 mA h g−1 at 0.2 A g−1 and superior rate capability of 237 mA h g−1 at a high current density of 2 A g−1 after 300 cycles. In particular, the high capacity could be ascribed to the synergistic effect of the conversion and alloying reactions during the electrochemical processes, which was validated by ex situ X-ray diffraction. The fabrication of a unique heterostructure combining the self-assembled Bi2S3 microspheres and flexible RGO boosted the facile charge transfer, leading to the enhanced cyclic stability and rate performance.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Ibrahim Abdalla,Ahmed Elhassan,Jianyong Yu,Zhaoling Li,Bin Ding
The quick improvement of up-to-date communication technology has generated ubiquitous electromagnetic wave (EMW), which poses a significant hazard to environment and human health. One of the key challenges associated with EMW is to develop highly lightweight and efficient adsorption materials that are able to alleviate the unfavorable interferences in wide-ranging frequency. Herein, we fabricated a hybrid porous carbon nanofibers (CNFs) membrane combined with reduced graphene oxide (rGO) and magnetic nanoparticles by electrospinning process followed by calcination . The composite membrane exhibited high-efficiency absorbing abilities due to its particular porous structure and introduced components in the final sample. Specifically, both cobalt and iron nanoparticles captured into CNFs are advantageous to the electrical conductivity of the membrane by lessening the contact loss via creating the metal-metal crossing points within membrane. The introduced components are capable of enhancing the absorption performance due to the improved permittivity ( ε r ) and permeability ( μ r ) in the composite structure. The minimum reflection loss (R L min ) value was demonstrated to be −43.60 dB at 5.84 GHz with a matching thickness of 5 mm. The synthesis of nanofibrous composite in this work identifies a new direction to fabricate advanced EMW absorption materials towards broad practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Fan Xie,Kun Gao,Longhai Zhuo,Fengfeng Jia,Qin Ma,Zhaoqing Lu
In this contribution, we demonstrated an efficient approach for constructing conductive aramid nanofibers based porous architectures by graphene oxide and Ti 3 C 2 T x via freeze drying and subsequent thermal reduction. Specifically, the aramid nanofibers laid the foundation for mechanical enhancement and good electrical conductivity of Ti 3 C 2 T x and RGO ensured outstanding electromagnetic shielding ability. The resultant Ti 3 C 2 T x /RGO/ANFs hybrid aerogel presented a spongy structure, which was conducive to the dissipation of incident electromagnetic waves through multiple reflection and scattering. The electromagnetic shielding efficiency reached 54.8 dB in X-band (8.2–12.4 GHz) with 25 wt% loading content of Ti 3 C 2 T x . When the addition amount of Ti 3 C 2 T x was 5 wt%, the optimum compressive stress of Ti 3 C 2 T x /RGO/ANFs hybrid aerogel reached 200 kPa under 70% strain with a relatively low density of 0.062 g/cm 3 . This work provided a feasible approach to fabricate robust hybrid aerogel with excellent electromagnetic shielding performance and compression resilience.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2026
·
IF 4.5
Wenwen Ding,Minzhi Chen
To address the key challenges in the synergistic optimization of low-cost fabrication, high sensing performance in wearable electronic textiles, this study developed a flexible pressure sensor based on cotton fabric modified with a synergistic combination of reduced graphene oxide (RGO) and carbon nanotubes (CNTs). Through a simple and efficient ultrasonic-assisted immersion combined with a chemical in-situ reduction process, a uniform RGO/CNTs hybrid conductive network was successfully constructed on the surface of knitted cotton fabric fibers, forming a sensing layer with a hierarchical microstructure. System characterization and performance evaluation demonstrated that the synergistic effect of RGO and CNTs significantly enhanced sensor performance: compared to single RGO modification, the composite sensor’s sensitivity increased by 131% (from 0.99 to 2.29 kPa⁻¹), while the pressure detection range was expanded to 0～142 kPa. Benefiting from the layered porous structure of the textile substrate and stable interface bonding, the sensor demonstrates outstanding comprehensive performance, including high sensitivity (2.29 kPa⁻¹) in the low-pressure range (0～25.69 kPa), fast dynamic response (response/recovery time: 84ms/92ms), a wide linear detection range (0～142 kPa), and excellent mechanical stability (no significant performance degradation after 12,000 compression cycles). Practical application verification confirms that this sensor can be used in fields such as human health monitoring, motion monitoring, and voice monitoring, demonstrating its potential applications in wearable electronics and smart clothing.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yongyang Chen,Fulin Li,Xiaochun Dong,Dan Guo,Yixuan Huang,Shanping Li
Efficient and stable rGO@Ti/SnO 2 –Sb composite electrodes were prepared by the sol-gel method. The microscopic morphology , crystal structure, and electrochemical properties of the rGO@Ti/SnO 2 -Sb composite electrodes were characterized by a range of characterization techniques. The electrocatalytic oxidation activity of the electrodes was evaluated by the degradation efficiency of the fluoroquinolone antibiotic norfloxacin (NOR). Simultaneously, the effects of different experimental conditions on the degradation efficiency of NOR were also investigated, such as calcination temperatures, brushing times, initial pH, initial electrolyte concentration , etc. The enhanced electrocatalytic oxidation activity can be attributed to the excellent electron transfer efficiency, higher electrode specific surface area, and stronger adhesion of the electrode coating to the substrate. Additionally, the possible NOR degradation pathway was deduced through the main intermediates, and the mechanism of NOR degradation was discussed based on experimental and characterization results. This work provides a simple and effective method to prepare highly active composite electrodes for electrocatalytic oxidation to remove organic pollutants from water.
研究领域:
环境科学
·
电化学工程
·
材料科学
·
水处理技术
·
污染控制化学
·
纳米复合材料
·
环境功能材料
✓ 已验证
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 11
·2836
·
IF 3.623
Jin Shao,Yi Yang,Xiaoyan Zhang,Liming Shen,Ningzhong Bao
In this study, we have successfully prepared a free-standing Si/void/rGO yolk–shell structured electrode via the electrostatic self-assembly using protonated chitosan. When graphene oxide (GO) is dispersed in water, its carboxyl and hydroxyl groups on the surface are ionized, resulting in the high electronegativity of GO. Meanwhile, chitosan monomer contains -NH2and -OH groups, forming highly electropositive protonated chitosan in acidic medium. During the electrostatic interaction between GO and chitosan, which results in a rapid coagulation phenomenon, Si/SiO2nanoparticles dispersed in GO can be uniformly encapsulated between GO sheets. The free-standing Si/void/rGO film can be obtained by freeze-drying, high-pressure compression, thermal reduction and HF etching technology. Our investigation shows that after 200 charge/discharge cycles at the current density of 200 mA·g−1, the specific discharge capacity of the free-standing electrode remains at 1129.2 mAh·g−1. When the current density is increased to 4000 mA·g−1, the electrode still has a specific capacity of 469.2 mAh·g−1, showing good rate performance. This free-standing electrode with a yolk–shell structure shows potential applications in the field of flexible lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
柔性电子器件
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·Vol. 46
·期 7
·5664-5676
·
IF 4.939
Shaohui Zhang,Qingxin Li,Haikun Zhou,Wei Xuan,Yili Liang,Zhiyong Xie,Feng Liu
In this paper, Pd catalysts supported on novel composite carbon supports were synthesized by the carbonization and hydrogen reduction of Pd 2+ -doped bacteria containing Ketjen EC600JD, CNT and rGO, respectively. The analysis results show that the prepared catalysts exhibit excellent ORR electrocatalytic performance in acid medium. The best ORR electrocatalytic performance was obtained for Pd/carbonized-bacteria-rGO, which exbibits a mass activity at 0.345 A mg −1 that is 9.58 times higher than commercial Pd/C, and meanwhile displays a better stability than that of Pd/C. The enhanced performance can be attributed to nitrogen doping and flexible carbon-coating microstructure. Herein, we elaborate an efficient and ecofriendly method for the synthesis of electrocatalysts used for oxygen reduction reaction.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 1
·15
·
IF 2.009
Tian Yuan,Sun Zhenghao,Zhao Yan,Zhang Yongguang,Tan Taizhe,Yin Fuxing
Novel Sb 2 Se 3 /reduced graphene oxide (rGO) composite, 1D Sb 2 Se 3 nanorods wrapped with rGO, has been successfully synthesized by a facile spray drying method. Compared to as-prepared Sb 2 Se 3 nanorods, the obtained Sb 2 Se 3 /rGO composite, as anode for lithium-ion batteries (LIBs), exhibited super electrochemical performances. The results suggest that Sb 2 Se 3 /rGO composite can retain a reversible capacity of 394 mAh g −1 over 200 cycles at 100 mA g −1 between 0.01 and 3 V (vs Li/Li + ). Even at a high rate current density of 1000 mA g −1 , a discharge capacity of 247 mAh g −1 was computed, indicating that this LIB possesses good rate capability. This improved electrochemical performance can be attributed to the 1D nanostructure, and also to the introduction of rGO, which provided more electron transport pathways and shortened the Li-ion diffusion through the electrolyte. Consequently, the cluster of 1D Sb 2 Se 3 nanorods that are wrapped in the rGO nanostructure can efficiently buffer large volume changes and retain the structural stability during lithiation and delithiation process, resulting in an excellent electrochemical performance.
Schematic illustration of the Sb 2 Se 3 /RGO composite synthesis process
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Bin Tan,Shenghua Han,Wenbin Luo,Zisheng Chao,Jincheng Fan,Mingyu Wang
MoS 2 as cathode materials of aluminum ion batteries can significantly improve the specific discharge capacity in the initial cycles. However, it electrical conductivity is poor and has strong interactions with higher charge density of Al 3+ cations. So MoS 2 cathode material suffers from rapid specific capacity decaying, which prevents the further development for aluminum ion batteries. Herein, a new phase engineering strategy is demonstrated for making MoS 2 -RGO (Reduced graphene oxide) composites for boosting the performance of aluminum ion batteries. Because the structure of MoS 2 is analogous to graphene, it can be used as a novel substrate for the growth of MoS 2 , which can increase the contact area of graphene and MoS 2 with forming perfect interlayer-overlapped composites. The Al/MoS 2 -RGO battery has a specific discharge capacity of 278.1 mAh/g in the initial cycles, and still maintains 150.2 mAh/g after 100 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）