Journal of Energy Storage
·
2025
·
IF 9.8
Biao Lu,Kaifeng Yu,Weide Shao,Jianing Zhang,Jinpeng Cao,Yong Cheng,Feifei Zhang
Redox flow batteries have gained significant attention in the context of large-scale energy storage systems, owing to their safety features, environmental sustainability, and the ability to decouple power generation from energy storage. However, the limited voltage and energy density of flow batteries pose challenges to their further advancement. In this work, we propose a novel hybrid flow battery that incorporates Ni(OH) 2 and hydrogen storage alloy respectively on the electrodes of Fe-DHPS flow batteries. This hybrid flow battery enhances the overall capacity of the battery while also mitigating the increased polarization often associated with the introduction of solid active substances into the tank. Additionally, it demonstrates a volume specific capacity of 60 Ah L −1 and an energy density of 65 Wh L −1 . Furthermore, these batteries demonstrate the capability to undergo 100 cycles at a current density of 60 mA cm −2 with a capacity decay rate of 0.3745 % per day. With the concentration of DHPS reaching theoretical solubility, the volume specific capacity can extend up to 120 Ah L −1 . This innovative flow battery, loaded with solid active substances on the electrodes, holds significant promise for large-scale energy storage systems.
研究领域:
能源存储技术
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Senyuan Yang,Zhengyong Huang,Qinghua Hu,Yingfan Zhang,Feipeng Wang,Haohuan Wang,Yingying Shu
The power electronics tend to become miniaturized and multifunctionalized, such as thermal rotators, circuit breakers, and microchips, which have necessitated creating instruments for investigating thermal mechanisms and enhancing thermal conductivity. In this paper, we construct the heat flow network of spherical boron nitride (BN) and used multiscale spherical BN to improve the thermal conductivity of the composite synergistically. The multiscale spherical filler ratio optimization model based on the Dinger–Funk particle stacking theory is established, which obtained the optimal volume ratio of 0.224:0.374:0.402 with D50 of 20, 70, and 160 μm. Meanwhile, the effects of multiscale filler ratio, morphology, filler content, and temperature are investigated. The thermal conductivity of composites can reach up to 1.84 W/(m·K) at 20 vol %. Significantly, the thermal conductivity of composites is 4.82 W/(m·K) at 30 vol %, which is achieved by optimizing the multiscale filler and particle size distribution.
研究领域:
材料科学
·
热物理学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Peng Xiao,Xiao-Mei Yang,Chang-Yu Sun,Jin-Long Cui,Nan Li,Guang-Jin Chen
A new method to improve the methane hydrate formation rate and gas uptake was developed through continuous impact on hydrate block with high interstitial water cut. Experimental investigations were conducted at temperature and pressure ranges of 273.3–279.2 K and 3.4–6.0 MPa, respectively, for different water loads and impact frequencies. Hydrate formation in quiescent sodium dodecyl sulfate (SDS) solution and pure water with rotational stirring was investigated for comparison. The reciprocating impact intensification method significantly improved the formation rate in both slurry and hydrate block stages as well as the final gas uptake. The fastest formation was observed at 274.7 K and 6.0 MPa, where 90% of hydrate formation was completed within 4 h. The largest gas uptake (150.3 V/V) in the hydrate was observed at 279.2 K and 6.0 MPa, which was slightly higher than that obtained from SDS. The advantage of the proposed method is that the final hydrate block is compacted in a significantly smaller bulk volume than that of the fluffy hydrate formed from SDS. Multi-growth was observed in hydrate formation when the reciprocating impact method was adopted. Temperature and pressure affected the formation kinetics but not methane uptake. The optimal conditions for hydrate formation in bulk water included a water/inner reactor space volume ratio of 0.18 and an impact frequency of 30 times/min. Additionally, the lowest power consumption for reciprocating impact was calculated as 3.77 × 10 −3 kW h/mol. These results indicate that it is feasible to store methane using clathrate hydrates without additives.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Kun Zhou,Zhida Zhao,Liyang Pan,Zheyao Wang
Silicon nanowire (SiNW) field-effect transistors (FETs) have been developed as various bio/chemical sensors due to their high sensitivity as a result of the huge surface-to-volume ratios. This paper presents a CMOS compatible sidewall mask technology (SMT) for top-down fabrication of SiNWs and a highly sensitive pH sensor based on SiNW FETs. The essence of SMT is to use stand-alone vertical sidewalls of a conformal thin film, fabricated by anisotropically etching away the planar part of the thin film deposited on a thin mesa, as hard masks for SiNW etching. As the feature size of the sidewalls, depending on the film thickness rather than lithography, can be controlled readily to tens to hundreds of nanometers by tailoring the film thickness, SMT allows high output and low cost fabrication of SiNWs without need of advanced lithography facilities. Complete SMT processes have been developed for fabrication of SiNW FETs, and pH sensors using SiNW FETs have been realized. Measurement results show that the pH sensors have good static characteristics and transient performance, and the sensitivity reaches 54.5 mV/pH for a wide range of pH values from 1 to 12, approaching the theoretical Nernstian limit.
研究领域:
纳米技术
·
生物医学工程
·
半导体器件
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Panpan Chen,Tian Hang
ZnO, as an important semiconductor, has been extensively studied for a wide range of applications. To date, with the development of micro/nano manufacturing technology, various hierarchical ZnO nanostructures have been fabricated and explored, showing encouraging success in advanced photodetectors. ZnO nanotube structure has a high surface-to-volume ratio, and versatile hollow channels, which are promising for sensing applications. Typical nanotube arrays primarily rely on advanced nanofabrication technologies. Simple and low-cost fabrication strategies are still lacking. Herein, we report a simple template fabrication method to obtain vertically aligned ZnO nanotube arrays. Using flexible, etched polyimide membranes as the template, ZnO nanotube arrays can be prepared in situ by dip-coating the sample into a zinc acetate solution followed by heating. Different hierarchical ZnO nanotube structures were obtained with the nanotube arrays when the method was combined with hydrothermal growth. We have demonstrated that the structures may be used in flexible and transparent photodetectors. Our work provides a facile approach for fabricating ZnO nanotube arrays and expands the application of ZnO nanotube structures to flexible and transparent photodetectors.
研究领域:
材料科学
·
纳米技术
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Zhaoxi Liu,Yapeng Tian,Jian Yang,Song Xu,Qingyong Tian,Pengfei Yan,Buxing Han,Qun Xu
Regulating the surface termination of a confined space to achieve ultrafast ion transport remains an ongoing challenge. Two-dimensional (2D) MXenes possess adjustable structures and interlayer spacing, which provide an ideal platform for in-depth investigation of ion transport in 2D confined space; however, the strong interaction of the negatively charged terminations in MXenes hinders the transport of intercalated cations. In this work, we proposed a strategy that precisely regulates the surface modification of Ti3C2Tx MXene with the weak polarity of boron atoms (SCB-MXene) via the distinct effect of supercritical CO2. This not only could effectively substitute −OH termination in MXene but also can prevent the loss of −O active sites, and then, both ultrafast ion transport and high volumetric capacitance can be achieved simultaneously. Ideally, a volumetric capacitance up to 742.7 C cm–3 at 1000 mV s–1 for the SCB-MXene film as pseudocapacitive materials that provides an energy density of 66.3 Wh L–1 even at an ultrahigh power density of 132.5 kW L–1 is obtained, which is a prominent record of energy density and power density reported up to now. Subsequently, it can be used in large-scale energy storage and conversion devices.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
·
界面化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Li Li,Shumeng Wu,Ke Wu,Hua Zhou,Yonghong Li,Meixia Guo,Lingbo Qu,Yanmei Zhou
The flexible and conductive carbon dots (CDs)/MXene films with zero-dimensional (0D)/two-dimensional (2D) dot-sheet motif architectures are successfully fabricated via the Coulombic interaction between negatively charged Ti3C2Tx MXene nanosheets and positively charged CDs synthesized from biomass by a green and economic one-pot hydrothermal process. The interlayer spacing coupled with the type and content of doped heteroatoms of the hybrid films can be regulated by the selected CDs with various particle sizes and heteroatoms. These CDs/MXene films with enlarged interlayer spacing and doped heteroatoms accelerate the ion diffusion and charge transfer. The optimized freestanding film electrode from pomelo juice with suitable layer spacing and profuse heteroatom doping indicates a high volumetric capacitance of 984.5 F cm–3 at a scan rate of 2 mV s–1, and a excellent volumetric energy density of 19.42 Wh L–1 is obtained in the corresponding assembled asymmetric supercapacitor. This study sheds light on a facile self-assembly route to fabricate multitudinous low cost and high-performance flexible MXene-based electrode.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2016
·
IF 1.207
Zhigang Lei,Yaru Guo,Yanyan Guo,Xinxin Li,Chengna Dai
This work was focused on the measurement of the solubility of hydrogen (H 2 ) in anthraquinone working solution at temperatures of 30.0–80.0 °C and pressures of 0.2–3.0 MPa by the method of experimental and COSMO-RS model study. The influence of various factors, i.e. , including pressure, temperature and solvent volume ratio, on H 2 solubility was investigated. According to the experimental results, H 2 solubility in anthraquinone working solution increases with the increase of pressure. At low pressures, the temperature had little effect on H 2 solubility while under high pressures H 2 solubility increases with increasing temperature. Henry's constant ln H has a good linear relationship with 1/ T (ln H = − 1319.1/ T + 9.91). The effect of volume ratio of trioctyl phosphate to trimethylbenzene on the solubility of hydrogen was studied and the results showed that increasing the amount of trimethylbenzene was conducive to the dissolution of hydrogen. In addition, there is a linear relationship between ln(( P 0 − P e ) / ( P t − P e )) and the time t . Gas–liquid mass transfer coefficient was obtained by calculating the slope of the line.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2020
·Vol. 27
·期 5
·1309-1317
·
IF 2.183
Yang Yunqiang,Zhang Jiali,Zhang Haixia,Hou Ying,Guo Junjie
High-performance, flexible reduced graphene oxide (rGO)-polypyrrole (PPy)/nanoporous gold (NPG) electrodes are prepared by a facile electrochemical interfacial polymerization method using NPG as the substrate. Owing to the synergistic effect of three-dimensional (3D) porous architecture and superior electrical conductivity, the prepared electrode not only exhibits a good areal capacitance (232 mF/cm 2 ), but also shows high volumetric capacitance (555.6 F/cm 3 ). Hence, an all-solid-state supercapacitor assembled with rGO-PPy/NPG electrodes exhibits a high energy density of 238.8 mW h/cm 3 . Besides, this flexible supercapacitor also shows excellent cycling stability with retention of 91% with respect to the initial capacitance after 2000 galvanostatic charge–discharge cycles. This work offers a novel avenue for designing flexible supercapacitor.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-14
·
IF 12.264
Wang Yuanming,Wang Xue,Li Xiaolong,Liu Rong,Bai Yang,Xiao Huanhao,Liu Yang,Yuan Guohui
All-pseudocapacitive and highly deformable MXene hybrid film is successfully fabricated by a facile and efficient vacuum-assisted filtration of ultrathin MoO 3 nanobelts and delaminated MXene nanosheets.
The optimal M/MoO 3 hybrid electrode delivers an ultrahigh volumetric capacitance of 1817 F cm −3 (545 F g −1 ), which exceeds large majority of previously reported MXene-based flexible electrodes.
The symmetric supercapacitor presents excellent energy density of 44.6 Wh L −1 (13.4 Wh kg −1 ), indicating the electrode promising in achieving high-energy-density devices.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2017
·Vol. 60
·期 4
·304-314
·
IF 3.956
Zhu Kunlei,Sun Yinghui,Wang Rongming,Shan Zhongqiang,Liu Kai
High-tap density electrode materials are greatly desired for Li-ion batteries with high volumetric capacities to fulfill the growing demands of electric vehicles and portable smart devices. TiO 2 , which is one of the most attractive anode materials, is limited in their application for Li-ion batteries because of its low tap density (usually <1 g cm −3 ) and volumetric capacity. Herein, we report uniform mesoporous TiO 2 submicrospheres with a tap density as high as 1.62 g cm −3 as a promising anode material. Even with a high mass loading of 24 mg cm −2 , the TiO 2 submicrospheres have impressive volumetric capacities that are more than double those of their counterparts. Moreover, they can be synthesized with ~100% yield and within a reaction time of ~6 h by optimizing the experimental conditions and formation mechanism, exhibiting potential for large-scale production for industrial applications. Other mesoporous anode materials, i.e., high-tap density mesoporous Li 4 Ti 5 O 12 submicrospheres, are fabricated using the generalizedmethod. We believe that our work provides a significant reference for the industrial production of mesoporous materials for Li-ion batteries with a high volumetric performance.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机合成
✓ 已验证
DOI
高影响因子
Soft Matter
·
2014
·Vol. 10
·期 25
·4498-4505
·
IF 4.151
Lingling Ge,Wanqing Shao,Shuhui Lu,Rong Guo
Droplet topology of a Janus emulsion in a vegetable oil (VO)/silicone oil (SO)/Tween 80 aqueous solution (Aq) system prepared in a one-step high energy mixing was investigated, mainly by image observation. Quantitative information of the topology was analyzed referring to the curvature of VO/SO interface, the location of contact plane, and the volume ratio of VO/SO within individual droplets. The results show that the “stable Janus emulsion” region in the phase map enlarges with surfactant concentration. The average volume ratio of two oil lobes within an individual Janus droplet agrees with the emulsion composition in the “stable Janus emulsion” region, which means that the droplet topology can be controlled by the emulsion preparation process within realistic limits. The volume ratio of VO/SO within individual droplet ranges from about 0.54 to 0.17 in the VO/SO/3 wt% Tween 80(Aq) system, beyond which separate VO and SO droplets are observed. The topology of a Janus droplet is found to be determined by both the contact angle of three liquids in the contact line and the location of the contact plane. The contact angle of the oil cap is determined by the interfacial tension referring to the local equilibrium. The location of the contact plane is the dominant factor determining the volume ratio of two oil lobes. Composition change in the emulsion results in the corresponding tune of the location of contact plane and subsequently, the volume ratio of two oils within Janus droplets.
研究领域:
胶体科学
·
化学工程
·
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）