Green Energy & Environment
·
2025
·
IF 14.6
Wenjun Zhu,Bofeng Zhang,Fanxing Bu,Minghai Zhao,Xinyong Tao,Keli Liu,Yuwen Fang,Wei Luo
1T-MoS 2 nanosheets, with metallic conductivity and high capacity, hold great potential for lithium-ion capacitors (LICs), but suffer from sluggish reaction kinetics due to dense stacking. Herein, 1T-MoS 2 nanosheets with enlarged interlayer spacing, vertically bonded to reduced graphene oxide (rGO) (1T-MoS 2 /rGO), were designed using a hydrothermal-assisted dispersion and intercalation strategy. The active nitrogen species derived from N, N-dimethylformamide (DMF) not only bridge the rGO and MoS 2 through strong Mo-N-C bonds to promote the formation of dispersed MoS 2 nanosheets, but also intercalate into the MoS 2 structure, further enlarging the interlayer spacing. This unique structure synergistically enhances meso- and microscale mass transfer outside and inside of the few-layered nanosheets, significantly improving electrochemical reaction kinetics and reducing the kinetic mismatch between the anode and cathode. Consequently, the resulting 1T-MoS 2 /rGO achieves a capacity of 500 mAh g -1 after 500 cycles at 5 A g -1 and a high rate performance of 587 mAh g -1 at a high rate of 10 A g -1 . Moreover, the assembled 3D vertical 1T-MoS 2 /rGO//AC LIC delivers a high energy density of 100.3 Wh kg -1 at a power density of 1.0 kW kg -1 , and long cycle stability with capacity retention as high as 91.02% after 5000 cycles at 2 A g -1 . This work provides a generalizable strategy for engineering two-dimensional material-based electrodes, offering new insights into high-performance energy storage systems.
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高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Lingna Sun,Qingwei Deng,Yongliang Li,Hongwei Mi,Suhang Wang,Libo Deng,Xiangzhong Ren,Peixin Zhang
CoO-Co 3 O 4 heterostructure nanoribbons were successfully sandwiched between reduced graphene oxide (RGO) nanosheets through a facile solvothermal method and sintering process, which used directly as the anode material for lithium ion batteries. The as-prepared ultrathin CoO-Co 3 O 4 nanoribbon/RGO sandwich-like nanostructures (CoO-Co 3 O 4 -RGO) delivers a reversible capacity of 994 mAh g −1 at a current density of 100 mA g −1 after 200 cycles. Even at a high charge-discharge rate of 1000 mA g −1 , CoO-Co 3 O 4 -RGO still demonstrate a reversible capacity of 395 mAh g −1 after 500 cycles. The rate capability of CoO-Co 3 O 4 -RGO evaluated by the ratio of capacity at 100, 200, 500, 1000, 2000, 5000 and 100 mA g −1 after each 10 cycles was about 1210, 1060, 890, 730, 578, 392 and 915 mAh g −1 , respectively. The greatly enhanced performances for CoO-Co 3 O 4 -RGO may be ascribed to the synergistic effects: The multicomponent generates hybridizing advantages; The mutual influence of both CoO-Co 3 O 4 nanoribbons and RGO nanosheets decreases the aggregation; The two-dimensional (2D) nanoribbons with the short lithium ion diffusion and 2D RGO sheets as conductive network built an efficient three dimensional (3D) storage active material.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 10
·6334-6343
·
IF 1.134
Xie Cong,Zhao Yubin,Song Yuxiang,Liu Yingjie,Wang Yaya,Yang. Ping,Gao Guanggang
On the basis of maintaining the original characteristics of each component, the composite material obtains the properties that the single component does not have through the synergy between the components. It is of great significance to understand the synergy between the components
for the development of the composite. First of all, we prepared different emitting CdTe quantum dots (QDs), and then fabricated CdTe QDs@reduced graphene oxide (rGO) composites by a simple ultrasonic method. It is found that the fluorescence of QDs quenched, the photocurrent significantly
improved, but the growth rate different from each other because of the different QDs. Afterwards, on the basis of naked QDs, hybrid SiO2-coated QDs were fabricated by a two-step method. After that, hybrid SiO2-coated CdTe QDs@rGO composites were prepared by the same method.
It is found that the existence of the hybrid SiO2 shell leads to the decrease of photocurrent of the composites before and after coating, but the specific capacitance significantly improved, and the cycle stability also better than the naked QDs. This research will make grapheme-based
composites have broad application prospects in energy storage equipment.
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PubMed
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 6
·2702-2714
·
IF 6.482
Arnauld Robert Tapa,Wanchun Xiang,Abdelaal. S. A. Ahmed,Senwei Wu,Bin Li,Qiufen Liu,Chawuch Machar Jacob Chuti,Xiujian Zhao
In this work, we employ a simple hydrothermal method to synthesize a metal–organic framework (MOF) derived selenide from a reduced graphene oxide (rGO)/structured zeolitic imidazolate framework (ZIF). The resulting MOF-derived selenide (rGO/ZnSe/CoSe2) consists of porous nanowires encapsulated in a carbon matrix and having a high surface area (169.30 m2 g−1). This porous rGO/ZnSe/CoSe2 is combined with polystyrene sulfonate-doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) for use as a CE for DSSCs. CEs based on different weight percentages (1, 3, and 5 wt%) of rGO/ZnSe/CoSe2 powder in PEDOT:PSS solution are compared with the commonly used platinum (Pt) based CE. The rGO/ZnSe/CoSe2–PEDOT:PSS composite benefits from the synergistic effects between porous rGO/ZnSe/CoSe2 having a high surface area and PEDOT:PSS which holds superior conductivity and strong binding capability with a fluorine-doped tin oxide (FTO) glass substrate. Therefore, the 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite based CE achieved a good stability and superior electrocatalytic activity compared to Pt CE. Furthermore, DSSCs based on a 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite CE achieved a higher power conversion efficiency (PCE) of 8.60%, compared to the PCE of the Pt CE based DSSC (7.14%) prepared under similar conditions. This work has revealed a new approach to prepare MOF-derived selenide based CEs with high electrocatalytic activity without any calcination. In addition, we demonstrated that the low-cost 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite CE is an excellent candidate to replace Pt CE in DSSCs.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Hongye Zhao,Xiangyang Xu,Yunfei Yao,Yina Li
Si/graphene composite has been considered as a promising structure to limit the volume expansion and improve poor conductivity of silicon anode. Herein, a novel method to prepare Si/reduced graphene oxide (Si/rGO) composite anode was proposed. With this approach, nickel shell was pre-coated on Si particles via electroless deposition before used as a template to in-situ reduce GO. During the reduction process, the nickel template can as well promote the self-assembly of graphene sheets on the surface of Si nanoparticles. Following these facile and convenient processes, a Si/rGO hybrid-structure can be directly fabricated. Compared with pure Si anode, this Si/rGO composite displays a greatly improved electrochemical performance in both cycling stability and rate capability. It delivers a reversible capacity as high as 975 mA h g −1 and 717 mA h g −1 after 300 cycles under the current densities of 1 A g −1 and 3 A g −1 , respectively. Meanwhile, its capacity can still maintain at 602 mA h g −1 even at a rather higher current of 5 A g −1 .
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高影响因子
Small
·
2025
·Vol. 21
·期 42
·e05135
·
IF 12.1
Jinwei Zhang,Xiaolin Zhang,Junmin Xu,Xinyue Li,Dezhi Xiao,Zhixia Duan,Han Zhou,Xinchang Wang,Paul K. Chu
A porous KVPO 4 F/reduced graphene oxide (KVPF/rGO) microgrid aerogel electrode is designed and fabricated using direct ink writing 3D printing for high-performance potassium-ion battery cathodes. This 3D-printed KVPF/rGO aerogel electrode, which integrates well-dispersed KVPO 4 F microspheres in the reduced graphene oxide matrix, shows enhanced structural integrity and electrical conductivity, thereby facilitating efficient ion and electron transport. The KVPF/rGO electrode achieves a reversible discharge capacity of 99.0 mAh g −1 at a current density of 50 mA g −1 in the voltage range between 2.0 and 5.0 V. It retains 93.9% of its capacity after 100 cycles and delivers a discharge capacity of 72.6 mAh g −1 at a high current density of 500 mA g −1 , demonstrating good rate capability. The role of rGO in improving charge transfer and minimizing polarization is demonstrated. The flexibility of the 3D-printed electrodes is validated by fabricating soft-pack batteries, which maintain stable performance under mechanical stress, an essential requirement for wearable electronics. The results highlight the large potential of 3D printing technology to enhance the properties and flexibility of potassium-ion batteries and pave the way for future advancements in energy storage devices.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 3
·1685-1696
·
IF 1.134
Wang Weijing,Han Na,Yang Chao,Zhang Wenxin,Miao Jinlei,Li Wei,Zhang Xingxiang
The process in which the nanofiber membrane is used to remove heavy metal ions and separation of oil-water solution is analyzed. Herein, smooth structures are induced by rGO-g-PAO sheets, which could be attributed to the strong interaction between P(AN-MA) and rGO-g-PAO. It is rewarding
to note that the P(AN-MA)/rGO-g-PAO nanofiber membrane would exhibit superhydrophilic traits in the air and ultra-low oil-adhesive traits underwater when the concentration of P(AN-MA) and PAO is 13 wt.% and 0.3 wt.%, respectively. The amidoxime (–C(NH2) NOH) groups on the
membrane surface can efficiently adsorb copper (Cu(II)) (1.65 mmol/g) and chromium (Cr(VI)) (4.70 mmol/g) ions in the waste water. Meanwhile, the P(AN-MA)/rGO-g-PAO nanofiber membrane exhibits ultrahigh flux (~6150 LMH), satisfying rejection rate (~97%) and outstanding flux recovery ratio
(~99%) in separating oil water emulsion.
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高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Lingna Sun,Qingwei Deng,Yongliang Li,Libo Deng,Yanyi Wang,Xiangzhong Ren,Peixin Zhang
Ternary copper oxides/reduced graphene oxide (Cu 2 O-CuO-RGO) composites were successfully synthesized in situ by a self-assembly solvothermal method in a water-ethanol mixture and used directly as the anode material for lithium ion batteries . The Cu 2 O-CuO-RGO composites delivered a reversible capacity of 842.5 mAh g −1 after 80 cycles at a current density of 100 mA g −1 , and after every 10 cycles at current densities of 100, 200, 500, 1000, 2000, 5000 and 100 mA g −1 , respectively, the specific capacities of the composites were approximately 840, 723, 511, 402, 336, 224, and 703 mAh g −1 , respectively. The improved electrochemical performance of the composites is closely related to its sandwich structure, with multicomponent Cu 2 O-CuO nanospheres adhering tightly to both sides of RGO nanosheets . This structure could shorten the transport pathways for both electrons and lithium ions , prevent the RGO nanosheets from stacking, enhance the electrical conductivity and accommodate the volume expansion that occurs during prolonged cycling.
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高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Xiaoting Liu,Yingyi Ma,Yu Si,Xinzheng Li,Xinran Li,Jingfang Li
Conducting polymers hold great prospects in energy storage, especially in the field of flexible energy storage, however, their broad applications are limited due to the poor processability, difficulty in structural design diversity and unsatisfactory performance when used alone. Herein, the processability of PEDOT in organic phase is significantly enhanced by surfactant modification via a self-assembly process, contributing to the convenient and low-cost construction of 3D PEDOT architecture. Importantly, the PEDOT and rGO can be introduced into the same porous structure synchronously and conveniently. Superior capacitive performance is shown for the porous PEDOT/rGO film benefits from the combination of PEDOT with excellent electrochemical stability, rGO with high conductivity and porous structure with abundant active sites and chambers for electrolyte storage. The porous PEDOT/rGO film can be used as a scaffold for the deposition of conductive polymers. For example, once PPy is deposited, a high specific capacitance of 407.8 F g -1 at a current density of 0.5 A g -1 , accompanied by a prominent capacitance retention of 90% after 5000 cycles are achieved. When it is used to construct the symmetric supercapacitor (SSC), a high energy density of 52.9 Wh kg -1 at the power density of 200.2 W kg -1 is delivered, with a high capacitance retention of 85%. Moreover, it shows excellent mechanical flexibility upon multiple bending cycles, rendering great potential in portable or wearable energy storage devices.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Shuolei Wang,Zhonggui Zhang,Zhao Li,Ziyue Zhang,MD. Zahidul Islam,Xiaojian Jiang,Hongyu Gao,Shi Xu,Yubing Dong
The sensor fabricated from high-molecular polymer is soft, lightweight, and biocompatible; however, traditional high-molecular polymers suffer from viscoelasticity and poor cycle stability. To address these issues, it is essential to develop flexible matrix materials that can overcome viscoelasticity, ensuring high sensitivity and long-term use under large strains for next-generation wearable intelligent devices. In this study, ethylene-vinyl acetate (EVA) with a shape memory effect was utilized as the substrate for a flexible sensor，the shape memory effect of EVA can eliminate the residual strain generated by each long time of use to improve its service life. A polydopamine@reduced graphene oxide (PDA@RGO)/EVA fiber flexible strain sensor was fabricated through melt extrusion, swelling ultrasound, and in-situ polymerization techniques. The resulting sensor exhibits high sensitivity (gauge factor=1801.21), a wide strain detection range (strain = 193 %), and excellent stability and durability (2000 cycles). Notably, the PDA@RGO/EVA fiber flexible strain sensor demonstrates exceptional dual thermal and light repair functions, with light repair achieving a repair speed of 5 seconds, 100 % electrical performance repair efficiency, and perfect consistency in relative resistance response before and after repair. Furthermore, the PDA@RGO/EVA strain sensor can monitor finger and wrist movements in real-time with high accuracy, highlighting its significant potential application in the wearable technology field.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 43
·20268-20282
·
IF 3.5
Qiu Hongfang,Peng Jian,Xu Weiwei,Fang Xiong,Lu Junyu,Di Xiaochuang,Lu Zhao,Chen Yang,Zou Huawei
The use of microwave absorption (MA) materials in practical aerospace applications would be challenging without a dependable mechanical support structure. However, achieving a wide effective absorption bandwidth (EAB) in aramid honeycomb structures at low weight gain is crucial for the practical aerospace applications of MA materials. To address this challenge, this study proposes a combination of porous carbon foam and high structural strength honeycomb to achieve broadband microwave absorption in structural devices through the synergistic effect of carbon foam absorption and honeycomb structure. The uniform filling process of ultra-lightweight reduced GO aerogel is achieved through freeze-drying, solving the issues of uneven dispersion and incomplete filling of traditional absorbers in honeycombs. Further optimization and comprehensive evaluation of filling concentration and reduction process were carried out. The freeze-drying process combined with chemically reduced honeycomb samples filled with different concentrations of GO all exhibit broadband absorption performance. At a specific standard honeycomb thickness of 15 mm, uniformly filled honeycomb samples with 0.1 to 0.3% GO exhibit triple resonance peaks near 2–3 GHz, 8–9 GHz, and 15 GHz, with effective absorption peaks all below − 10 dB. Moreover, the incorporation of transparent wave honeycomb walls in conjunction with honeycomb materials enhances the overall impedance matching, leading to a further improvement in the EAB to 10.53 GHz for the honeycomb sample filled with 0.2% freeze-dried and reduced GO. CST simulation data confirms that the loss in the honeycomb samples originates from uniform conduction loss, and the electric field stably enters the interior of the honeycomb. This approach, based on the rapid and efficient filling of uniform RGO by freeze-drying, provides a new way to achieve broadband microwave absorption in aramid honeycombs and has significant potential for development in the field of aerospace stealth.
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高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Qingqing Hu,Yaoqi Huang,Linfeng Li,Yuanyuan Li,Xiaomin Cheng
The slow heat transfer rate, leakage susceptibility, and low photothermal conversion efficiency of the phase change materials (PCMs) may limit their application in thermal energy storage. To tackle this problem, photothermal composites (MoS 2 -rGO) were prepared by hydrothermal synthesis method, and then polyethylene glycol-6000 (PEG-6000) and MoS 2 -rGO composites were encapsulated in polyacrylamide (PAM) by free radical polymerization to form an integrated photothermal storage system. The melting enthalpy (ΔH m ) of the light-thermal phase change gel (LTPCG) was 140.9 J/g and the crystallization enthalpy (ΔH c ) was 134.8 J/g when the PEG-6000 loading reached 85 %. After 300 cycles, the ΔH m and ΔH c were 137.7 and 132.1 J/g, respectively, which were 2.3 % and 2.1 % lower than the initial values, demonstrating excellent thermal storage durability. In addition, under simulated solar irradiation conditions, the MoS 2 -rGO composites were able to capture photons and rapidly transfer phonons with high efficiency, achieving a photothermal conversion efficiency of 87.5 %. The prepared composite PCM has excellent thermal storage and photothermal properties, which are of practical significance for the efficient use of solar energy.
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高影响因子
危险品化学品经营许可证（带存储）