Metals
·
2023
·Vol. 13
·期 4
·643
·
IF 2.9
Wenjing Chen,Manning Li,Jiancheng Tang
In order to maximize the reuse of used electronic component resources, while reducing environmental pollution, Cu metal was recycled from wasted CPU sockets by the reformative slurry electrolysis method. However, the influences on the regulation of the Cu recovery rate and purity from waste CPU slots, by slurry electrolysis, has not been systematically elucidated in previous studies. In this work, the effects of H2SO4concentration, slurry density, NH4Cl concentration, current density, and reaction time, on the recovery rate and purity of Cu in slurry electrolysis, were researched by systematic experimental methods. The results showed that the recycled metal elements were mainly present as powders from the cathode, rather than in the electrolyte. Moreover, the metallic elements in the cathode powder consisted of mostly Cu and small amounts of Sn and Ni. The recovery rate and purity of Cu were up to 96.19% and 93.72%, respectively, with the optimum conditions being: an H2SO4concentration of 2 mol/L, slurry density of 30 g/L, NH4Cl concentration of 90 g/L, current density of 80 mA/cm2, and reaction time of 7 h. Compared with previous studies, the Cu recovered in this experiment was present in the cathode powder, which was more convenient for the subsequent processing. Meanwhile, the recovery rate of Cu was effectively improved. This is an important guideline for the subsequent application of slurry electrolysis for Cu recovery.Keywords:wasted CPU socket;slurry electrolysis;recovery rate of Cu;purity of Cu;current density;slurry density
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Xinyu Zhao,Wangfeng Bai,Yuqin Ding,Leijie Wang,Shiting Wu,Peng Zheng,Peng Li,Jiwei Zhai
Large energy storage density in relaxor ferroelectrics is commonly accompanied with high breakdown strength, which is adverse to the actual dielectric capacitor applications. We demonstrate that such drawback can be effectively resolved by using Sr 0.7 Bi 0.2 TiO 3 (SBT) to partially replace relaxor ferroelectric 0.76(Bi 0.5 Na 0.5 )TiO 3 -0.24NaNbO 3 (BNT-NN-xSBT). In this study, a high recoverable energy storage density ( W rec ∼3.12 J/cm 3 ) and favorable efficiency ( η ∼75.3 %) are achieved in the BNT-NN-0.1SBT ceramic under a low electric field of 200 kV/cm, which is superior to that of most previously reported dielectric ceramics under the same electric field level. Good temperature stability (25−120 °C), moderate frequency dependence (1−500 Hz), and excellent fatigue resistance (up to 10 5 cycles) are also realized. More interestingly, the indicated ceramics perform high power density ( P D ∼36.40 MW/cm 3 ) and fast discharge time ( t 0.9 ∼0.149 μs) with remarkable temperature endurance. Moreover, of particular significance is that this study offers a feasible guideline to design comprehensive energy storage performance dielectric ceramics for practical applications.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2025
·
IF 4
Shah Nouman Ali,Shakir Namra,Gul Rizwan M.,Xu Jia-Zhuang,Li Zhong-Ming
Ultra-high molecular weight polyethylene (UHMWPE) is a versatile polymer with various industrial applications, particularly in orthopedic implants and structural materials. However, its susceptibility to oxidation limits its utility in demanding environments. This study investigates the potential of d -sorbitol (DS), a natural polyol, in enhancing the oxidation stability and crosslink density of UHMWPE when stabilized with tea polyphenols. Tea polyphenols, such as epigallocatechin gallate (EGCG), have been previously evaluated as a promising candidate to stabilize UHMWPE against oxidation without affecting its crosslink density. However, the higher content of EGCG has adverse effect on its mechanical properties. It is hypothesized that addition of DS to EGCG can improve the oxidation and crosslink density of UHMWPE blends. For this purpose, EGCG/DS was blended with UHMWPE at low antioxidant concentrations (≤ 1 wt%), and its comprehensive performance was evaluated. Results demonstrate that the incorporation of d -sorbitol effectively retards oxidation-induced degradation in tea polyphenol-stabilized UHMWPE. The presence of d -sorbitol enhances the crosslink density within the polymer matrix, thereby improving its resistance to oxidative stress. Furthermore, the study elucidates the underlying mechanisms through which DS interacts with EGCG and UHMWPE, elucidating the formation of stable complexes that mitigate oxidative damage. The in vitro biocompatibility of the blends was also very promising for use in artificial joints.
研究领域:
高分子材料
·
生物医学工程
·
抗氧化研究
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Anqi Zhang,Rui Gao,Lingyuan Hu,Xiaogang Zang,Ru Yang,Shiyu Wang,Shuyun Yao,Zhiyu Yang,Haigang Hao,Yi-Ming Yan
Transition metal oxides with high theoretical capacity are known to show greatly limited energy and power density of electrochemical energy storage due to its sluggish charge transfer kinetics. Although oxygen vacancies at atomic level can efficiently regulate electronic configuration and ameliorate electrochemical performance, the construction of rich bulk oxygen vacancies is still a challenge. Here, rich oxygen vacancies were successfully introduced in bulk MnO 2 through complex induced chemical precipitation. Enhanced electrical conductivity and local electric-field formed around oxygen vacancies promote the charge transfer, remarkably enhancing capacitance and rate capability. Asymmetric supercapacitor of MnO 2 with rich bulk oxygen vacancies exhibits high energy density (54.2 Wh kg −1 ) and power density (3279.6 W kg −1 ), superior to most reported MnO 2 -based supercapacitor. Our strategy paves a way for the fine regulation of bulk electronic configuration and reaction kinetics.
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
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Xiaohui Tang,Hongjun Zhang,Fangzhe Li,Dongliang Wang,Yong Huang,Hua Ke
Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low W rec . We design materials with high values of Δ P ( P max - P r ) and recoverable energy storage density( W rec ) from the high entropy perspective. Two single phases with a large Curie temperature T c difference have been selected, which leads to the enlarged entropy. The ceramics (Bi 0.85 Nd 0.1 Sm 0.05 ) 1- x Ba x )(Fe 1- x Ti x )O 3 (BNSBFT x ) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy( S config ) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization( P r ) and the improved W rec . The W rec of BNSBFT 0.5 ceramics reaches 4.9 J/cm 3 at a low field of 250 kV/cm. Both temperature change(∼ 0.5% from 30 °C to 140 °C) and frequency variation(∼ 4.8% from 1 Hz∼50 Hz) in W rec show excellent stability.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2024
·Vol. 14
·期 20
·9232
·
IF 2.5
Tao Jia,Jinpeng Yang,Jia Yu
Understanding the density of CO2+n-decane is crucial for designing and operating CO2capture, transport, and storage. The safety and effectiveness of CO2burial is directly affected by the density of CO2+n-decane mixtures. The liquid densities of CO2(1) +n-decane(2) mixtures with mole fractions of CO2x1= 0, 0.2032, 0.4434, 0.7589, and 0.8947 were measured using a vibrating tube densimeter. The combined expanded uncertainties of density with a level of confidence of 0.95 are estimated to be 0.6 kg·m−3. A total of 221 compressed liquid densities of CO2(1) +n-decane(2) mixtures along the five isotherms betweenT= (283 and 363) K with pressures up to 100 MPa were presented. The densities of mixtures were correlated by the modified Tait equation, resulting in absolute average deviations between the experimental and calculated values of 0.028%, 0.013%, 0.017%, 0.044%, and 0.042%. In addition, the isothermal compressibility, isobaric thermal expansivity, and excess molar volume were derived from the modified Tait equation.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yuqi Liu,Chengyuan Wang,Jiufeng Dong,Yujuan Niu,Zizhao Pan,Liang Sun,Yani Lu,Xuyang Wang,Li Li,Jiangyu Li,Jiannong Wang,Hong Wang
Nanofillers and polymer matrices are utilized to construct nanocomposites, offering a promising approach to enhance energy storage performance in harsh conditions. This strategy relies on structural design to introduce deep charge traps that regulate carrier transport within the material. However, comprehensive studies combining theoretical and experimental methods to elucidate how trap introduction by nanofillers improves capacitive performance remain limited. Here, we in-situ synthesized alumina (AO) nanosheets via a hydrothermal method and fabricated uniformly dispersed nanocomposites with polyimide (PI) as the matrix. Energy band theory revealed that AO nanosheets introduced deep charge traps at the PI-AO interface, substantially reducing leakage current density. High-resolution Kelvin probe force microscopy (KPFM) experimentally confirmed the presence of interfacial deep charge traps at the nanofiller/polymer interface. Thermally stimulated discharge current (TSDC) was further measured to characterize variations in trap depth and density among different materials. At 150 °C, the optimized nanocomposite achieved a high energy storage density of 2.72 J cm −3 with a charge–discharge efficiency exceeding 90 %, corresponding to approximately 448 % of the performance of pristine PI. This work bridges critical gaps between experimental observations and theoretical mechanisms, clarifying the role of interfacial charge traps in nanocomposite performance.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Niu Yanhui,Yu Wenbin,Yang Shuguang,Wan Quan
This research delved into the influence of mesoporous silica’s surface charge density on the adsorption of Cu 2+ . The synthesis of mesoporous silica employed the hydrothermal method, with pore size controlled by varying the length of trimethylammonium bromide (C n TAB, n = 12, 14, 16) chains. Gas adsorption techniques and transmission electron microscopy characterized the mesoporous silica structure. Surface charge densities of the mesoporous silica were determined through potentiometric titration, while surface hydroxyl densities were assessed using the thermogravimetric method. Subsequently, batch adsorption experiments were conducted to study the adsorption of Cu 2+ in mesoporous silica, and the process was comprehensively analyzed using Atomic absorption spectrometry (AAS), Fourier transform infrared (FTIR), and L3 edge X-ray absorption near edge structure (XANES). The research findings suggest a positive correlation between the pore size of mesoporous silica, its surface charge density, and the adsorption capacity for Cu 2+ . More specifically, as the pore size increases within the 3–4.1 nm range, the surface charge density and the adsorption capacity for Cu 2+ also increase. Our findings provide valuable insights into the relationship between the physicochemical properties of mesoporous silica and the adsorption behavior of Cu 2+ , offering potential applications in areas such as environmental remediation and catalysis.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Yuan Zhou,Yang Yang,Xun Zhu,Ding-ding Ye,Rong Chen,Qiang Liao
The power generation property of direct liquid fuel cells at high current densities is plagued by gas bubbles generation. Herein, we propose a bubble-trap layer to help mitigate the problem and improve the power generation stability performance. A novel chip-based liquid fuel cell with the bubble-trap layer is fabricated as a facile visualization and fast test platform, validating that most of CO 2 bubble releases from the bubble-trap layer in situ rather than at the microchannel outlet. The dynamic behaviors of gas bubbles are visualized and their impact on the power generation performance is discussed. It suggests the fuel cell equipped with the bubble-trap layer has superior power generation stability, power density (29 mW cm −2 ) and current density (163 mA cm −2 ), which are 10% and 27% higher than that without the bubble-trap layer. And a maximum power density of 35 mW cm −2 is achieved. The bubble growth and gas emission mechanisms are analyzed according to the mechanical model, providing a guidance for the channel design and operation condition determination of cells. These results demonstrate the viability of applying the bubble-trap layer for stabilizing power generation and cast new light on the structure design of direct liquid fuel cells.
研究领域:
能源科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Zixuan Li,Zhangyi Xiong,Heli Pan,Ningzhao Shang,Yongjun Gao
A kind of graphene oxide-based carbon electrode material for aluminum complex ion supercapacitor (Al-SC) is developed through KNO3-assisted explosion and followed capillary densification process, which has a large specific surface area and active sites for storing positive and negative ions. With the dual-salt electrolyte composed of aluminum chloride and ionic liquid, the capacitance of Al-SC reaches 549 F g–1 in the case of current density of 0.5 A g–1 and voltage from 0 to 3.5 V. Characterizations and control experiments demonstrate that the special porous structure and abundant oxygen-containing groups endow the Al-SC with a significant high energy density of 233 W h kg–1 and ultrahigh power density of 17,500 W kg–1. The electrochemical storage mechanism of aluminum complex ions is also researched by ex situ characterization and theoretical calculation. This Al-SC paves the way for electrochemical energy storage based on aluminum species.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhengyan Chen,Runzhuo Xue,Baoli Fan,Yilan Wang,Wenhui Tian,Lu Pei,Yanling Jin,Zhengzheng Guo,Zhenfeng Sun,Fang Ren,Penggang Ren
Although bimetallic nickel-cobalt sulfides (Ni/Co-S) have shown promising candidates as pseudocapacitive materials with excellent electrochemical performance, achieving high energy density, high power density, and good cyclability of Ni/Co-S electrode remains a challenge. In this study, the graphene foam (GF) with a three-dimensional (3D) skeleton was successfully prepared using a chemical vapor deposition (CVD) method. Subsequently, Ni/Co-S was in situ grown on the GF through a two-step hydrothermal method. A series of Ni/Co-S@GF- x ( x =1, 2, 3) electrodes were prepared and optimized for electrochemical performance by regulating the molar ratio of Ni/Co salt precursors (3:1, 4:1, 5:1). The abundant pore structure of Ni/Co-S@GF not only facilitates ion migration, but also provides numerous electrochemical redox active sites for reactions. When utilized as electrodes in supercapacitors, the Ni/Co-S@GF-2 with a Ni/Co salt’s molar ratio of 4:1 displays a specific capacity of 4.68 C cm −2 at 1 mA cm −2 . Furthermore, an asymmetric supercapacitor (ASC) was assembled using the optimal Ni/Co-S@GF-2 as cathode and Walnut shell-derived porous carbon as anode to evaluate the actual energy storage characteristics of the device. The ASC delivers a high power density of 822.86 mW cm −2 at an energy density of 32.0 mWh cm −2 . This work presents a promising approach for designing and preparing nickel-cobalt sulfides for application in flexible energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Donghan Xu,Cuijuan Zhang,Yihan Zhen,Yongdan Li
Nonaqueous redox flow batteries (NARFBs) are a potential candidate for high-energy-density storage systems because of their wider electrochemical windows than that of the aqueous systems. However, their further development is hindered by the low solubility of organic redox-active materials and poor high-current operations. Herein, we report a liquid anolyte material, 3-nitrotoluene (3-NT), which demonstrates high chemical stability and mass- and charge-transfer kinetics. The NARFB based on 2,5-di-tert-butyl-1-methoxy-4-[2′-methoxyethoxy]benzene/3-NT exhibits an energy efficiency of 71.8% even at a relatively high current density of 60 mA cm–2. Benefiting from the high miscibility of the redox species, an ultra-high volumetric energy density of 37.8 W h L–1 can be achieved at 1.0 M. This work provides a viable method to build an NARFB with both high operational current density and energy density for next-generation, low-cost, and high-energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）