ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Li Wang,Jie Yu,Xuantong Dong,Xia Li,Yingzhen Xie,Shouhui Chen,Ping Li,Haoqing Hou,Yonghai Song
Supercapacitors are considered as potential innovation for energy storage owing to their long charge–discharge life and high power density. Herein, a simple and industry-scalable approach was developed to prepare the hybrid of Fe3O4-doped porous carbon nanorods (Fe3O4-DCN) supported by three-dimensional (3D) kenaf stem-derived macroporous carbon (KSPC) for high-performance supercapacitor, which was prepared via pyrolyzing the iron fumarate metal organic frameworks (MIL-88A, MIL stands for Materials from Institut Lavoisier)/3D-KSPC. The resulted 3D-KSPC/Fe3O4-DCN nanocomposites were carefully characterized by various techniques including scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray powder diffraction and N2 adsorption/desorption isotherms. The 3D-KSPC/Fe3O4-DCN were employed as a promising electrode materials of supercapacitors by combining the advantage of Fe3O4-DCN (e.g., high specific capacitance, good rate capability and excellent cycling stability) with the superiority of 3D-KSPC (e.g., large specific surface area and hierarchical pores and high conductivity), exhibiting a high specific capacitance of 285.4 F g–1 at the current density of 1 A g–1. The capacitance was kept at 220.5 F g–1 after 5000 cycles at 2 A g–1, indicating outstanding cycle performance. This work might provide a new strategy to prepare nanostructures on 3D-KSPC for future applications.
研究领域:
材料科学
·
纳米科技
·
能源存储
·
电化学
·
功能材料
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2012
·Vol. 194
·期 1
·38-43
·
IF 3.407
An-Hua Liu,Ran Ma,Meng Zhang,Liang-Nian He
Carbon dioxide, being one of the major greenhouse gases responsible for global warming, its atmospheric level grows ever faster since the beginning of industrial era. Great efforts have been devoted to developing versatile technologies/processes to adjust and manipulate the rapid growth of CO 2 emission. Besides CO 2 capture and storage/sequestration (CCS) to control its emission, chemical utilization of the captured CO 2 (CCU) emerges to be a rational technique for economical benefits as well as environmental concerns. As for the aim of CO 2 utilization, an environmentally benign CO 2 /water reversible acidic system was developed for the copper (II)-catalyzed selective oxybromination of electron-rich aromatics without the need of any conventional acid additive and organic solvent. Notably, up to 95% yields of the bromination products were attained with good regio-selectivity when cupric bromide was used as the catalyst and lithium bromide as a cheap and easy handling bromine source under supercritical CO 2 . The catalytic system worked well for electron-rich aromatics including ethers, sulfides and mesitylene. Carbonic acid in situ formed from CO 2 and water is supposed to act as the proton donator in the Brønsted acid-promoted reaction. Notably, CO 2 in this study serves as a reaction medium and a promoter in conjunction with water and also provides safe environment for aerobic reactions. Given with excellent reaction efficiency as well as no need of neutralization disposal, this process thus represents an environmentally friendly approach for aerobic bromination of aromatics with essential reduction of CO 2 emission as well as an economically beneficial way for application of captured CO 2 .
研究领域:
有机化学
·
绿色化学
·
催化化学
·
环境化学
·
化学工程
·
二氧化碳资源化
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Zhi Liu,Ningning Chen,Wanying Guo,Yinshuang Pang,Nailu Shen,Hong Chen,Wanying Zhang,Feichang Feng,Jingxiang Zhao,Yanyu Liang
Carbon-based materials are commonly used as anodes for potassium-ion batteries due to their high conductivity and stable cycling performance. However, their practical application is greatly hindered by their low capacity. Herein, we introduce facile sulfur chemistry including thioether bonds and CoS₂ into a nitrogen-oxygen co-doped partially graphitized carbon skeleton (NOGC), while the extra reconfiguration process of carbon assists forming the CoS₂@R-NOGC composites. The reconfigured NOGC (R-NOGC), enriched with highly electronegative elements (N, O, S), significantly enhances the reversible potassium ion storage capacity. The ordered carbon structure provides more efficient ionic transport pathways, thereby improving K⁺ transport efficiency. Moreover, layered CoS₂ acts as additional ion transport channels and active sites, further enhancing ion mobility and storage capacity. R-NOGC also promotes the reconstruction and repair of the solid electrolyte interface (SEI) layer to form a more robust interface. As a result of the synergistic effect between R-NOGC and CoS₂, it exhibits excellent anode performance, including a high reversible capacity (314.0 mAh/g at 0.1 A/g) and long-term stability (250.3 mAh/g at 0.5 A/g after 1,000 cycles). This work presents a novel strategy for designing and synthesizing high-performance anode materials for potassium-ion batteries, significantly enhancing both capacity and cycling stability.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yuan Xia,Xiaohang Zhu,PengPeng Qiu,Mengjie Li,Bo Wang,Guojuan Hai
Titania is considered to be an attractive candidate as anode for sodium ion batteries due to excellent cycle stability, advanced safety features, and small volume deformation in the charge-discharge process. However, limited by sodium storage mechanism, the fast charge and discharge performance of multi-crystals titania is failed to satisfy the requirements of commercial application. Here, we develop a Matryoshka-like carbon nanotubes@anatase nanocrystalline@amorphous carbon (CNTs@aTiO 2 @C) nanofibers for ultrafast sodium ion storage. A nano-confinement coating strategy is demonstrated for constructing an intermediate layer assembled by ultrafine nanocrystalline (2-3 nm) of anatase. The synthesized Matryoshka-like nanofibers with diameters of ∼95 nm consists of amorphous carbon outer layer (10-13 nm), anatase nanocrystalline assembled intermediate layer (13-15 nm), and carbon nanotube core. Benefit from the ultra-refinement of anatase nanocrystalline and Matryoshka-like micro-morphology, the proportion of the capacitive-controlled contribution are up to 90.1 %, 90.6%, 91.9 %, 92.3%, and 93.6% with sweep rate increased from 0.2 to 0.4, 0.6, 0.8, and 1.0 mV s −1 , thus result in an outstanding reversible specific capacities of ∼120 mA h g −1 with Coulombic efficiency of ∼99.5% after long-life of 10000 cycles at ultrafast rate of 10 A g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zekai Miao,Zhenkun Guo,Guofeng Qiu,Wenke Jia,Keran Jiao,Yixin Zhang,Jianjun Wu
Coal gasification fine slag (FS), classified as an industrial solid waste, is composed of residual carbon (RC) and slag particles (SP). The simultaneous utilization of RC and SP to prepare hierarchical porous composite (HTC) could realize the value-added utilization of FS. The role of SP in FS on HTC preparation is extremely vital and worthy of study. In this paper, FS was successfully used to synthesize HTCs for CO 2 adsorption. Orthogonal experiment was conducted to study the effect of SP on the properties of the synthesized HTCs. The changes of impregnation conditions could be effective for developing pore structure of HTCs and the surface area increased by 226 m 2 /g. Furthermore, the role of SP in FS on HTCs preparation was analyzed. After chemical activation, there was generation of many new pores in SP that the surface area and pore volume could reach 302 m 2 /g and 0.271 cm 3 /g. Besides, the leached metallic elements in the process of KOH impregnation could affect the mesopore development. The HTCs also proved to be attractive for CO 2 capture. The highest CO 2 adsorption capacity of 2.35 mmol/g at 25 °C was achieved with 5-PH-FSHCT sample. It also exhibited good selectivity of CO 2 over N 2 of 9.5. Furthermore, the sample had not only fast adsorption kinetics that it reached saturation levels in about 1.5 min, but also excellent regeneration efficiency 97% after ten cycles. All results suggest that FS has a great potential to be reused as a high performance adsorbent for practical and industrial CO 2 adsorption applications.
研究领域:
能源与环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 5
·49781
·
IF 2.52
Qi Li,Xiaojuan Tian,Ni Wu,Yun Li,Ting Pan,Bing Zhang,Yongli Duan,Shuyang Wang,Yongfeng Li
Graphene-based composite is promising as thermal interface material (TIM) due to its outstanding thermal properties. However, there are some bottlenecks to excellent performance, such as agglomeration of particles and undesirable voids between nanoplatelets. In this work, a composite with three-dimensional (3D) thermally conductive network has been assembled, which combines three kinds of nanofillers varying geometric dimensions. Thermal conductivity (TC) of composite with graphene nanoplatelets (GNPs) and carbon-nanotubes (CNTs) at a weight ratio of 3:1 is around 9% higher than that of GNP-based composite. By the introduction of carbon spheres (CSs), the TC is further increased by 28%. The enhanced thermal property further demonstrated by FLIR infrared camera is attributed to the formation of 3D heat conduction paths by GNPs, CNTs, and CSs, where the GNPs play the role of thermally conductive backbones. The other two components are introduced to attenuate the aggregation and strong thermal anisotropy. Moreover, the TC is confirmed nearly isotropic, which is different from most graphene-based TIMs because of the in-plane alignment. Our results indicate that the apparent synergy endows this 3D nanofiller great potential for heat dissipation applications requiring heat removal in two directions.
研究领域:
材料科学
·
热管理技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Fenglian Tong,Jixi Guo,Yanliang Pan,Huibiao Liu,Yan Lv,Xueyan Wu,Dianzeng Jia,Xiaojuan Zhao,Shengchao Hou
Commercial graphite with low theoretical capacity cannot meet the ever-increasing requirement demands of lithium-ion batteries (LIBs) caused by the rapid development of electric devices. Rationally designed carbon-based nanomaterials can provide a wide range of possibilities to meet the growing requirements of energy storage. Hence, the porous walnut anchored on carbon fibers with reasonable pore structure, N -self doping (10.2 at%) and novel structure and morphology is designed via interaction of inner layer polyethylene oxide and outer layer polyacrylonitrile and polyvinylpyrrolidone during pyrolysis of the obtained precursor, which is fabricated by coaxial electrospinning. As an electrode material, the as-made sample shows a high discharge capacity of 965.3 mA h g −1 at 0.2 A g −1 in the first cycle, retains a capacity of 819.7 mA h g −1 after 500 cycles, and displays excellent cycling stability (475.2 mA h g −1 at 1 A g −1 after 1000 cycles). Moreover, the capacity of the electrode material still keeps 260.5 mA h g −1 at 5 A g −1 after 1000 cycles. Therefore, the obtained sample has a bright application prospect as a high performance anode material for LIBs. Besides, this design idea paves the way for situ N -enriched carbon material with novel structure and morphology by coaxial electrospinning.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 53
·114327-114335
·
IF 5.8
Zhou Hao,Zhang Dayong,Jiang Yongjun,Zeng Bo,Zhao Chenxi,Zhang Mingjie,Zeng Baiyan,Zhu Xiaoquan,Su Xintai,Romanovski Valentin,Bi Ran
The spent carbon cathode (SCC) is a hazardous solid waste from aluminum production. It has an abundant carbon source and a unique graphitic carbon layer structure, making it a valuable waste for recycling. This paper uses alkaline and acid leaching methods to report a straightforward way of extracting recovered carbon (RC) from SCC as anode material for lithium-ion batteries (LIBs). The results show that alkaline and acid leaching conditions at 70 °C with 1 M NaOH and HCl solution individually in 6 h and a liquid-solid ratio of 20:1 can result in RC with up to 94.63% carbon content than 49.38% in SCC, exhibiting a typical graphite structure. SCC and RC materials are obtained after calcination at 400 °C in an inert atmosphere and used as anode materials (SCC-400 and RC-400). In this paper, The initial charging specific capacities are 490.0 mA h g −1 , 195.4 mA h g −1 , and 423.2 mA h g −1 and initial coulombic efficiencies (ICE) are 67.8%, 78.9%, and 72.0% of RC-400, SCC, and SCC-400. RC-400 also shows excellent capacity retention and impedance values. This exciting finding provides a viable, non-hazardous, and resourceful method for treating and disposing of SCC from aluminum electrolysis.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xingping Lu,Yating Hu,Li Wang,Qiaohui Guo,Shuiliang Chen,Shouhui Chen,Haoqing Hou,Yonghai Song
A novel kenaf stem-derived porous carbon/nitrogen-doped carbon nanotubes/polyaniline (denoted as KSC/NCNTs/PANI) nanocomposite was constructed in this work. Three-dimensional (3D) KSC/NCNTs nanocomposites were firstly constructed through a CVD method. The NCNTs were densely distributed on the channel walls of KSC, which increased both the effective surface area and the active sites greatly. Then, the PANI was grown on the KSC/NCNTs by using in situ chemical oxidation polymerization method. The obtained 3D KSC/NCNTs/PANI nanocomposites were carefully characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and Raman spectra. The nanocomposites were employed as the electrode materials of supercapacitors owing to their unique advantages originating from both PANI (e.g. interesting electroactivity, high pseudocapacitance, unusual doping/dedoping chemistry) and KSC/NCNTs (e.g. large specific surface area, high porosity, good electrical conductivity), and exhibited a high specific capacitance. At the current density of 0.1 A g −1 , the KSC/NCNTs/PANI nanocomposites showed a specific capacitance of 1090 F g −1 with a specific energy density around 97 Wh kg −1 . Moreover, the specific capacitance remained 96.9% after 1000 charging/discharging cycles at a current density of 0.1 A g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2015
·Vol. 29
·期 4
·240-243
·
IF 2.248
Dongsheng Bai,Zhiyong Zhang,Guangjian Wang,Fang Ma
The cycloaddition of epoxide and CO 2 to synthesize cyclic carbonate catalyzed by VO(IV) porphyrin was achieved under 1.4 MPa at 150°C. The effects of reaction temperature, time, CO 2 pressure, co-catalyst and porphyrin framework were investigated. The catalytic results showed that moderate to high yields of cyclic carbonates were obtained under the optimal reaction conditions. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
化学
·
环境科学
✓ 已验证
DOI
高影响因子
HYDROMETALLURGY
·
2021
·
IF 4.156
Fangjia Yan,Xiaojuan Zhang,Edouard Asselin,Dongping Duan,Zhibao Li
Two interconnected reactors were used to produce high quality SrCO 3 by leaching celestite in NaHCO 3 solution at elevated temperature of 363.15 K. This new method avoids undesirable polluting by-products generated in the widely used black ash process. The precipitation kinetics of celestite (SrSO 4 ) leaching in NaHCO 3 at various temperatures was investigated with a view to industrial application. It was found that high temperature significantly enhanced the leaching conversion while initially concentrated Na 2 SO 4 in leaching solution has limited influence on the leaching reaction. The new process overcomes the key disadvantage of high energy consumption during sodium sulfate recovery that is inherent in the soda ash process. Having studied the effects of NaHCO 3 concentration and temperature on the leaching reaction, a shrinking core model was established with an apparent activation energy of E a = 86.6 kJ/Mol. The rate-determining step was the diffusion of ions through the product layer. Saleable Na 2 SO 4 products were successfully obtained via evaporative cooling crystallisation
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 18
·10874-10880
·
IF 3.361
Xiaobin Liu,Xudong Zhao,Li-Zhen Fan
The growing demand for sustainable energy has led to in-depth research on hydrogen production from electrolyzed water, where the development of electrocatalysts is a top priority. We here report a controllable strategy for preparing the cobalt–nickel alloy nanoparticles encapsulated in nitrogen-doped porous carbon by annealing a bimetal–organic framework. The delicately tailored hierarchical Co2Ni@NC nanoparticles effectively realize abundant synergistic active sites and fast mass transfer for the oxygen evolution reaction (OER). Remarkably, the optimized Co2Ni@NC exhibits a small overpotential of 310 mV to achieve a current density of 10 mA cm−2 and an excellent long-term stability in alkaline electrolyte. Furthermore, the underlying synergistic effect mechanism of the Co–Ni model has been pioneeringly elucidated by density functional theory calculations.
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）