Nano-Micro Letters
·
2019
·Vol. 11
·期 1
·1-12
·
IF 9.043
Wang Siliang,Wang Qiang,Zeng Wei,Wang Min,Ruan Limin,Ma Yanan
Restricted by their energy storage mechanism, current energy storage devices have certain drawbacks, such as low power density for batteries and low energy density for supercapacitors. Fortunately, the nearest ion capacitors, such as lithium-ion and sodium-ion capacitors containing battery-type and capacitor-type electrodes, may allow achieving both high energy and power densities. For the inspiration, a new zinc-ion capacitor (ZIC) has been designed and realized by assembling the free-standing manganese dioxide–carbon nanotubes (MnO 2 –CNTs) battery-type cathode and MXene (Ti 3 C 2 T x ) capacitor-type anode in an aqueous electrolyte. The ZIC can avoid the insecurity issues that frequently occurred in lithium-ion and sodium-ion capacitors in organic electrolytes. As expected, the ZIC in an aqueous liquid electrolyte exhibits excellent electrochemical performance (based on the total weight of cathode and anode), such as a high specific capacitance of 115.1 F g −1 (1 mV s −1 ), high energy density of 98.6 Wh kg −1 (77.5 W kg −1 ), high power density of 2480.6 W kg −1 (29.7 Wh kg −1 ), and high capacitance retention of ~ 83.6% of its initial capacitance (15,000 cycles). Even in an aqueous gel electrolyte, the ZIC also exhibits excellent performance. This work provides an essential strategy for designing next-generation high-performance energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Huali Hao,Wei Mo,Yonghu Lv,Shulong Ye,Ruinan Gu,Peng Yu
The influence of trace elements on the powder metallurgy of Cu was investigated. It was found that 1 wt. % of Ti can effectively increase the green density of the compacts and facilitate the subsequent sintering process, thus resulting in increased sintered density. Although 1 wt. % of W added into the Cu leads to similar increasing of green density, W significantly retarded the sintering process and has a negative effect on the sintered density. Moreover, intermetallic Cu 4 Ti were formed, which not only creates a short-circuit diffusion path for Cu but also forms liquid phases during sintering. However, it was hardly dissolved between W and Cu.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Jian Yang,Xianyang Meng,Jiangtao Wu
As the important industrial raw materials, n-pentene, n-hexene, and n-heptene are widely used as gasoline additives to improve the combustion characteristics of gasoline and polymerized monomer to synthesize many important polymer compounds. Therefore, reliable density data are significant for these fluids to apply in industry. In this work, new experimental densities of n-pentene, n-hexene, and n-heptene have been measured at pressures up to 100 MPa along nine isotherms between 283 and 363 K by using a high pressure vibrating-tube densimeter. The experimental system was calibrated using water and a vacuum and was tested with R134a over the entire temperature and pressure ranges. The combined expanded uncertainties of the temperature, pressure, and density with a level of confidence of 0.95 (k = 2) are estimated to be 16 mK, 0.062 MPa (p ≤ 60 MPa), 0.192 MPa (60 MPa < p < 100 MPa), and up to 0.6 kg·m–3 depending on the temperature and pressure ranges. The density data were correlated with the Tait-like equation, and the average absolute deviations are 0.06, 0.04, and 0.05%. Furthermore, the isothermal compressibility and the isobaric thermal expansivity were derived from the Tait-like equation over the experimental temperature and pressure ranges.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Tianqi He,Xiaoya Kang,Fujuan Wang,Rui Wang,Lei Zhao,Yuanyou Peng,Fen Ran
Developing high power density sodium-ion batteries by exploiting the high power nature of capacitive behavior has been a hot topic in recent years. However, the improvement in power density of sodium-ion batteries usually comes at the cost of a loss in energy density, so a trade-off between power and energy densities is required. Herein, we innovatively establish a connection between the capacitive contribution in the electrode material and the energy and power densities of sodium-ion batteries. The energy and power densities of sodium-ion batteries at high current densities are equilibrated by tuning the capacitive contribution in the hard carbon materials. First, it is proved that the power and energy densities are a joint function of the current density and the capacitive contribution by theoretical analysis. Then, hard carbon materials are designed and fabricated by tuning the capacitive contribution guided by the theoretical analysis to equilibrate energy and power densities of sodium-ion batteries at high current densities. Finally, the variation of the power and energy densities of the sodium-ion batteries with the current density and capacitive contribution is obtained. The results indicate that at low current densities (<1 A/g), the sodium-ion batteries employed with hard carbon anode with low capacitive contribution have a similar power density but higher energy density compared with those with high capacitive contribution. When the current density reaches or exceeds 1 A/g, the sodium-ion batteries employed with hard carbon anode with high capacitive contribution reveal both higher power and energy densities (power and energy densities are 8,316.66 Wh/kg and 251.81 W/kg at 3 A/g, respectively). These results are attributed to the various capacity decay rates of the battery and capacitive parts at different current densities, and the energy density provided by the capacitive part is limited. This work provides guidance on the introduction of capacitive contribution in electrode materials for ion batteries from a full-battery perspective.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2021
·Vol. 28
·期 1
·140-152
·
IF 1.993
Zhengpeng Yu,Jingjing Zeng,Jingyuan Tang,Yu Li,Tingting Jin,Benlan Zeng,Xianhua Wei,Jingsong Liu,Linyu Pu,Xu Huang
Owing to their excellent dielectric properties and energy storage performance, polymer-based composites have shown great potential in the application of pulse energy storage capacitors and electrostatic capacitors. In this study, BaTiO 3 (BT) particles with different sizes were modified with dopamine to prepare core–shell structured BT particles (PDA@BT), and then the poly(arylene ether nitrile) (PEN)-based PDA@BT/PEN composites were prepared. As a common biological material, dopamine has a variety of functional groups which can be used to improve the compatibility between the fillers and the matrix. Moreover, the movement of the carriers at the interface of the composites is limited and the loss is reduced. The composites with an optimized filler size illustrate a high energy density of 1.37 J/cm 3 at 160 kV/mm, which nearly reaches up to the energy density of biaxially oriented polypropylene (BOPP) at low electric field. In addition, the composites have the superior power density of 1.88 MW/cm 3 with a fast discharge time of 0.138 μs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2021
·Vol. 11
·期 12
·2100020
·
IF 29.368
Wenbin Kang,Li Zeng,Shangwen Ling,Chuhong Zhang
Modern electronics place stringent requirements on power supplies, calling for high energy and power density within restricted footprints. 3D printing allows for customized electrode designs with outstanding loading densities and represents a seemingly promising solution. However, the sluggish mass transport within bulky matrices presents serious issues to charge storage kinetics. Doping engineering in conjunction with 3D printing is used to achieve a state-of-the-art areal capacitance of 11.8 F cm −2 , which is among the best for carbonaceous supercapacitors, results in an electrode heavily loaded at 85.1 mg cm −2 . Simultaneously, an uncompromised kinetic performance rivaling high-rate thin films is delivered, allowing for flash-charging within 3.6 s while keeping 78.1% capacitance. In agreement with theses appealing features, an unprecedented energy density of 0.66 mWh cm −2 and power density of 1039.8 mW cm −2 for a symmetrical device are registered. Meanwhile, the printed device is equipped with superb mechanical compliance, a rarely achieved, yet gravely desired attribute for 3D printed energy storage devices. This work suggests that flexible energy storage devices with unimpaired kinetics at extremely large loading densities could be realized, therefore overturning the traditional mindset that such a performance can only be achieved in thin film devices which are, however, incapable of securing a large energy output.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Matter
·
2023
·
IF 18.9
Congming Li,Xiangming Li,Wei Yu,Ronglin Xiao,Fei Huang,Hongmiao Tian,Chunhui Wang,Xiaoliang Chen,Jinyou Shao
Massively fabricating graphene with high density and high ion conductivity is critical but challenging for large-scale compact capacitive energy storage with high energy and power densities. Here, we demonstrate an efficient, kilogram-scale method for fabricating dense, turbostratic graphene by turbulent flow and isotropic capillary compression at violent boiling temperature, successfully resolving the trade-off between high density and high ion conductivity, as well as scale producing. Turbostratic graphene exhibits 5.4× enhanced ion conductivity, high density of up to 1.12 g cm −3 , and volumetric capacitance of 234 F cm −3 . Stack cells deliver an energy density of 83.2 Wh L −1 and power density of 14 kW L −1 , a milestone in capacitive energy storage. Moreover, orientation and porosity of turbostratic graphene can be tuned by precursors, demonstrating flexibility and viability for diverse applications. Furthermore, all-solid-state pouch cells are fabricated using ionic gel electrolyte, exhibiting multiple optional outputs and being leakage free at bending and folding states.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2025
·
IF 4.9
Liangxue Bao,Congping Xu,Ruding Zhang,Hongjun Yue
With the increasing demand of high energy and power density for energy storage devices, aqueous zinc-based batteries with high safety and low-cost battery system, have attracted wide attention due to their inherent advantages. Herein, for the first time, fluorinated carbon (CF 0.95 ) materials are reported as cathodes for alkaline zinc batteries and exhibit unprecedented power and energy density. The results show that the material exhibits a very high specific capacity of 703.5 mAh/g as well as an ultrahigh energy density up to 795.5 Wh/kg at a current rate of 50 mA/g (0.071C). Besides, it still holds high capacity of 416.7 mAh/g when discharged at a rate of 50000 mA/g (71C), indicating an outstanding power performance of 25066.0 W/kg. The corresponding capacity can even reach to 170.6 mAh/g, 706 mAh/g and 562.6 mAh/g when it is evaluated at a current rate 0.71C under −20 °C, 0 °C and 50 °C respectively. Finally, electrochemical discharge mechanism based on the conversion reaction is also further uncovered by XRD and SEM characterization and EDS elemental analysis. In conclusion, the alkaline Zn/CF x new-type primary battery systems with excellent properties developed here might show broad application prospects.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Yong Fan,Yifan Liu,Yiming Chen,Muhammad Shoaib,Tianhui Yu,Jun Luo,Xian Jian
Surface modification of carbon fluoride (CF x ) is one of typical methods to reduce polarization and enhance electrochemical discharge kinetics, in case of ultraviolet (UV) surface modified solid CF x powder, it faces the challenge of uneven issue. Herein, a uniform UV-inducing approach in dynamic alcoholic solution for macro CF x modification was developed to enhance the high rate performance. This approach possesses the advantage of good dispersibility and precise controllability of CF x particles, enabling large-scale preparation in kilogramme level (1∼3 kg per time). The UV-induced CF x displays the high energy density of 785.7 Wh kg -1 and ultrahigh-power density of 90580 W kg -1 at 70 C. The UV-inducing CF x with ultra-thin carbon layers (∼ 0.35 nm) has large specific surface area, abundant electrochemically active C-F bonds, enhanced electrical conductivity and reducing the energy barrier of Li + intercalation into CF x layers. These above synergistic effects supress the polarization, enhance the discharge kinetics behaviour, activate the CF x bond and increase the power density. This work provides a uniform and large-scale approach for Li/CF x primary batteries with ultra-high energy density as well as power density.
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 Energy Chemistry
·
2022
·
IF 13.599
Xiaolin Luo,Rui Lu,Xiaoqin Si,Huifang Jiang,Quan Shi,Haixia Ma,Cong Zhang,Jie Xu,Fang Lu
The access to high-density hydrocarbon fuels from biomass for the reduction of dependence on fossil resources has been a research highlight in recent years. It is well known that cycloalkanes are the components of fuels with higher energy density than straight or branched alkanes. Herein, we developed a new catalytic pattern to synthesize dimethyltetradecahydroanthracenes (DMTHA), a kind of tricyclic alkane, from biomass-derived isoprene and p -benzoquinone via a cascade Diels-Alder reaction followed by a hydrodeoxygenation reaction. Vanadium supported on titanium dioxide (V-TiO 2 ) was applied to catalyze the cascade Diels-Alder reaction and it was disclosed that V with appropriate V 4+ /V 5+ ratio on the surface of TiO 2 could activate quinones. Experimental tests showed that the heating value of final products was up to 45.7 MJ/kg. The development of new high-density fuel molecules is a long-term trend for the future renewable and sustainable fuel energy application .
研究领域:
化学工程
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
·
2022
·Vol. 110
·期 8
·1956-1967
·
IF 3.405
Yameng Yu,Boya Ma,Chen Guo,Xinbang Jiang,Zhuang Liu,Yamin Chai,Lichun Wang,Yunzheng Du,Biao Wang,Nan Li,Lailiang Ou
Lowering of low-density lipoprotein (LDL) levels in blood of patients with hyperlipidaemia can effectively prevent the progression of atherosclerosis and coronary heart disease. The present study demonstrated a facile synthesis strategy to prepare biomembrane-mimetic LDL adsorbent (PVA@COOH-PE) via directional immobilization of phospholipid onto macro-porous cross-linked poly(vinyl alcohol) spheres. The binding between the prepared adsorbent and LDL particles simulates the cytosolic lipid droplets to form a lipid-packing structure. The adsorbent possesses satisfactory removal efficiency for LDL and total cholesterol (TCH) in hyperlipemia serum, while remains high-density lipoprotein (HDL) concentration within the normal range. The adsorption capacities for LDL and TCH are about 1.13 and 1.74 mg/ml respectively, which are nearly three and four times higher than that of HDL (0.42 mg/ml). The adsorbent also possesses satisfactory anticoagulant properties, causes negligible effect on blood cells and produces low hemolysis ratios. The excellent blood compatibility plus LDL removal efficiency of PVA@COOH-PE indicates its good application prospect as hemoperfusion adsorbent in the treatment of hyperlipidaemia.
研究领域:
生物医学工程
·
材料科学
·
血液学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2023
·
IF 5.2
Linyu Pu,Jingjing Zeng,Yiting Long,Huan Zhang,Xu Huang,Jingsong Liu
Barium titanate (BT) nanoparticles were surface coated by a silane coupling agent (KH550) and core–shell structured nanoparticles (named KH550@BT) were obtained. Similarly, BT nanoparticles coated by polydopamine (PDA) were named as PDA@BT. Meanwhile, boron nitride (BN) nanosheets (BNNS) were successfully unstripped from block BN. Then, two kinds of ternary poly(arylene ether nitrile) (PEN)-based composites are prepared using the solution casting method. Composites with 30 wt% KH550@BT and 12 wt% BNNS were named as KH550@BT/BNNS/PEN. Composites with 30 wt% PDA@BT and 12 wt% BNNS were named as PDA@BT/BNNS/PEN. The microstructure, dielectric properties, and energy storage properties of the ternary composites were studied in detail. PEN embedded with either BNNS or BT were prepared and studied for comparison. As a result, the introduction of BT will improve the dielectric constant ( ε r ) and energy storage density ( W ), but it will reduce the breakdown strength ( E b ) and charge–discharge efficiency ( η ) of composites. BNNS not only improves E b and W but also improves η of composites. Although the introduction of BT and BNNS simultaneously may reduce η , it will improve ε r , E b , and W of composites. Most importantly, the fast discharge speed and high power density demonstrate that the BT/BNNS/PEN composites are potential candidates to be used in high power pulsed capacitors fields. Highlights Boron nitride nanosheets improve the breakdown strength of composites. The composites achieve simultaneous increment of ε r and E b . The power density of the BT/BNNS/PEN composites was higher than 70 MW cm −3 .
研究领域:
材料科学
·
电气工程
✓ 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）