Materials Today Energy
·
2018
·
IF 0
Guangyao Ma,Chengjun Li,Fan Liu,Muhammad K. Majeed,Zhenyu Feng,Yanhua Cui,Jian Yang,Yitai Qian
Metal-organic frameworks (MOFs)-derived metal chalcogenides/carbon, has been developed as promising anode materials for lithium/sodium ion batteries. However, they are not explored for potassium-ion batteries yet. Here, ZIF-67 is employed as a self-sacrificed template to synthesize Co 0.85 Se nanoparticles in N-doped carbon as an anode material for potassium-ion batteries. In this composite, N-doped carbon enhances the electron conductivity, cushions the volume change and inhibits the aggregation of Co 0.85 Se upon cycling. Meanwhile, mesoporous structure shortens the diffusion distance of potassium ions , as well as increases the contact between electrolyte and electrode. These features endow this composite superior performances. It delivers a specific capacity of 114.7 mA h g −1 at 1000 mA g −1 after 250 cycles. At 2.0 A g −1 , the specific capacity still maintains at 110.7 mA h g −1 . The electrochemical performances of full cells based on Co 0.85 Se@NC as an anode material are also investigated. The result greatly spurs the exploration of metal chalcogenides as anode materials for potassium ion batteries .
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
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Meng Shao,Yuanyuan Cheng,Tao Zhang,Sheng Li,Weina Zhang,Bing Zheng,Jiansheng Wu,Wei-Wei Xiong,Fengwei Huo,Jun Lu
Sodium-ion batteries suffer the disadvantages of poor rate performance and cycling stability due to its sluggish sodiation kinetics. A rational design strategy for both materials compositions and structures has been proposed to meet these challenges. Herein, a triple-component composite derived from metal–organic frameworks, comprising FeS2, nitrogen–sulfur co-doped porous carbon, and reduced graphene oxide (FeS2@NSC/G), has been successfully synthesized. With the capacities contributions from different sodium storage routes (diffusion-controlled processes and surface capacitive processes) at varies rate conditions, it is aiming to make full use of each component in the electrode composite and their unique porous structures. Expected electrode properties have been achieved and related electrochemical behaviors have also been investigated. The strategy would present a promising thought for composites design, which could enhance high-rate electrochemical energy storage performances.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 38
·21460-21471
·
IF 2.936
Zhongzheng Zhang,Nannan Sun,Wei Wei,Yuhan Sun
A new strategy for controlled synthesis of a MOF composite with a core–shell structure, ZIF-8@resorcinol–urea–formaldehyde resin (ZIF@RUF), is reported for the first time through in situ growth of RUF on the surface of ZIF-8 nanoparticles via an organic–organic self-assembly process by using hexamethylenetetramine as a formaldehyde-releasing source to effectively control the formation rate of RUF, providing the best opportunity for RUF to selectively grow around the nucleation seeds ZIF-8. Compared with the widely reported method for MOF composite synthesis, our strategy not only avoids the difficulty of incorporating MOF crystals into small pore sized materials because of pore limitation, but also effectively guarantees the formation of a MOF composite with a MOF as the core. After carbonization, a morphology-retaining N-doped hierarchical porous carbon characterized by its highly developed microporosity in conjunction with ordered mesoporosity was obtained. Thanks to this unique microporous core–mesoporous shell structure and significantly enhanced porosity, simultaneous improvements of CO2 adsorption capacity and kinetics were achieved. This strategy not only paves a way to the design of other core–shell structured MOF composites, but also provides a promising method to prepare capacity- and kinetics-increased carbon materials for CO2 capture.
研究领域:
材料化学
·
环境科学
·
纳米材料
·
多孔材料
·
碳捕集
·
物理化学
·
功能材料
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 7
·期 4
·1084-1092
·
IF 6.813
Muhammad K. Majeed,Rashid Iqbal,Arshad Hussain,Mina Lotfi,M. Umar Majeed,M. Zeeshan Ashfaq,M. Sufyan Javed,Muhammad Ahmad,Adil Saleem
Through collective use of experimental investigation and theoretical approaches, i.e., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, microscopic properties and density functional theory (DFT) calculations, we comprehensively characterize the structural, morphological, and lithium (Li) storage performance of double-shelled silicon@ZIF-8@ZIF-67 (Si@DNC). The unique architectures not only absorb the huge volume variation stress of Si during cycling but also provide enhanced electrical conductivity and manipulate the stability and integrity of a well-wrapped double-shelled framework. Additionally, N-doped carbon can also enhance the conductivity of electrodes. The superior Li storage performance in double-shelled structures is refined via an interactive lithiation/delithiation approach and validated using DFT calculations. Typically, the as-prepared Si@DNC delivered enhanced cycling stability with a high discharge capacity of 2537.8 mA h g−1 in the first cycle and 1285 mA h g−1 after 200 cycles at 200 mA g−1. Therefore, the double-shelled structure reflected outstanding electrochemical performance and is expected to be a forthcoming candidate for anode materials in next-generation lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
计算材料学
✓ 已验证
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Cai Gao,Jianze Feng,Jingrou Dai,Yuanyuan Pan,Yulong Zhu,Wenhang Wang,Yunfa Dong,Linfang Cao,Lu Guan,Lei Pan,Han Hu,Mingbo Wu
The sluggish kinetics in anode materials severely prevents the practical use of lithium/sodium-ion batteries in many current and emerging applications. To overcome this bottleneck, we report a facile and scalable strategy to construct nitrogen and phosphorus co-doped carbon nanosheets with abundant electron-rich regions rendering a strong cation attraction and expanded interlayer spacing for fast lithium/sodium diffusion, which allows excellent rate capable anodes for lithium/sodium-ion batteries. Specifically, the as-prepared nanosheets afford outstanding pseudocapacitive behavior with superior rate capacities of 379 and 140 mA h g −1 at a high current density of 5.0 A g −1 for lithium and sodium storage, respectively, while the calendar life can be as long as thousands of cycles. The extraordinary rate capability is further demonstrated through combined use of quantitative kinetics analysis, galvanostatic intermittent titration technique measurements and theoretical simulation. Considering the extraordinary electrochemical performance and comprehensive analysis of pseudocapacitive lithium/sodium storage mechanism, this work holds great potential to serve as a fundamental reference for exploring robust pseudocapacitive electrode materials.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
电池化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kanjun Sun,Dongyang Guo,Xiaoping Zheng,Yanrong Zhu,Yanping Zheng,Mingguang Ma,Guohu Zhao,Guofu Ma
In this paper, nitrogen-doped activated carbons obtained from rapeseed residues (N-RCs) as supercapacitor electrodes are successfully synthesized by a simple chemical activation method. The field emission scanning microscope, transmission electron microscopy, and N 2 adsorption-desorption tests demonstrate that N-RCs treated with ZnCl 2 can produce a large number of mesopores. Additionally, the N-RCs have certain amount of nitrogen (nitrogen content in N-RC2 is 6.55% by element content analysis). As the electrode material, N-RC2 exhibits ideal capacitive behavior in 6 mol L -1 KOH aqueous electrolyte in a three-electrode system tests, and the maximum specific capacitance reaches 250 F g -1 at a current density of 0.5 A g -1 . Furthermore, in 0.5 mol L -1 Na 2 SO 4 aqueous electrolyte, the as-assembled N-RC2//N-RC2 symmetric cell exhibits high energy density of 13.55 Wh kg -1 at a power density of 399.80 W kg -1 operated at the voltage range of 0 to 1.8 V and an excellent cycleability retaining about 92.8% initial capacitance after 5000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
环境功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 79
·64318-64325
·
IF 3.84
Gang Fan,Jianlong Ge,Hak-Yong Kim,Bin Ding,Salem S. Al-Deyab,Mohamed El-Newehy,Jianyong Yu
Designing and fabricating hierarchical porous carbon nanofibrous (CNF) membranes with good mechanical properties is an attractive and challenging work for the next generation of functional separation materials. Here, we demonstrate a novel strategy to create a heterostructured CNF membrane with multiscale pores via multicomponent electrospinning and nano-doping methods. The resultant membrane exhibits an intriguing shape memory property, which can be bent to a radius < 100 μm without any fracture and recover from the deformation rapidly. Besides that, the carbonaceous nanofibrous membrane is quite soft like polymer based wrapping paper. Such robust mechanical properties may be attributed to the “plasticizer” effect of the doped SiO2 nanoparticles and the protogenetic graphitized carbon layers in the carbon matrix. More interesting, benefitting from the functional nitrogenous groups and the hierarchical porous structures, these CNF membranes possess a high adsorption capacity for target protein molecules and high water permeability (15 202 ± 1927 L m−2 h−1 under 3 kPa driven pressure), which is an order of magnitude higher than the commercial polymer based affinity membranes. As this technology is effective and easy to operate, more multifunctional CNF based nanoscale materials could be developed for the next generation of highly efficient proteins separations.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
分离科学
·
生物材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 14
·11749-11753
·
IF 3.289
Wei Zuo,Guiqin Yu,Zhengping Dong
An N-doped mesoporous carbon supported Ni nanoparticle nanocatalyst (Ni/m-CN) was prepared in a facile manner by the carbonization of Ni-MOFs. The Ni/m-CN nanocatalyst exhibited excellent catalytic activity for the reduction of nitroarenes under mild conditions. Moreover, the Ni/m-CN nanocatalyst can also be easily recovered and reused due to its superparamagnetism.
研究领域:
材料化学
·
催化化学
·
纳米材料
·
环境化学
·
绿色合成
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 6
·2804-2811
·
IF 7.233
Caifu Dong,Lijun Guo,Yanyan He,Limei Shang,Yitai Qian,Liqiang Xu
Cobalt sulfides are attractive as intriguing candidates for anodes in SIBs and LIBs owing to their unique chemical and physical properties. In this study, a precursor of Co1−xS with a uniform and hollow nanospherical architecture is obtained with a high yield via a mild solvothermal method in the presence of 2-methylimidazole at first. Then, Co1−xS, Co1−xS/C (ultrafine Co1−xS nanoparticles embedded in the shells of the nitrogen-doped porous carbon hollow nanosphere), and Co1−xS@C (Co1−xS nanoparticles entirely covered by an external amorphous carbon layer) were selectively fabricated via direct calcination or PPy coating & calcination of the obtained precursor. Co1−xS/C shows best electrochemical performance than the other two materials as anodes for sodium-ion batteries (SIBs). Besides the excellent rate performance, a high reversible discharge capacity of 320 mA g−1 can be retained after 130 cycles at 1 A g−1. The impressive performance may be attributed to the unique structure, higher conductivity, and more active sites of Co1−xS/C. In addition, 559 mA h g−1 was maintained after 100 cycles at 500 mA g−1 when the Co1−xS/C composite was applied as an anode in lithium-ion batteries (LIBs). The high reversible capacity, excellent cycle stability combined with the facile synthesis procedure render Co1−xS/C a prospective anode material for rechargeable batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 16
·6380-6387
·
IF 3.069
Wenbin Wang,Yuying Yang,Xiaotong Wang,Yi Zhou,Xinyuan Zhang,Lulu Qiang,Qian Wang,Zhongai Hu
In this study, uniform nitrogen-doped hollow carbon spheres (NHCSs) have been synthesized using sphere-like SiO2 as a template and polydopamine as a carbon source. It is found that NHCSs have an ultrahigh specific surface area of 870.1 m2 g−1 and high porosity. 9,10-Phenanthrenequinone (PQ) molecules are selected to decorate NHCSs to obtain electrode materials (NHCSs/PQ) for supercapacitors, which show a clear capacitance increase in comparison with pure NHCSs when tested in 1 M H2SO4 aqueous solution. In a three-electrode system, the NHCSs/PQ (mass ratio 4 : 2) electrodes exhibit larger specific capacitance (as high as 252 F g−1 at 1 A g−1) and an ultrahigh rate capability (80.8% capacitance retention at 30 A g−1). Furthermore, the asymmetric supercapacitor is assembled using NHCSs/PQ as a positive electrode material and nitrogen-doped porous carbon (NPCs) that has adsorbed anthraquinone as a negative electrode material, respectively. The device exhibits a high energy density of 8.34 W h kg−1 along with a power density of 600 W kg−1.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
Batteries & Supercaps
·
2022
·Vol. 6
·期 1
·e202200427
·
IF 6.043
Sheng Wu,Xiaoyi Lu,Kaili Zhang,Junling Xu,Zhipeng Sun
Among anode materials for sodium-ion batteries (SIBs), hard carbon (HC) gains more attention due to its low cost, high electronic conductivity, and renewable resources. However, sluggish kinetics result in its low-rate capability and unfavorable cycle stability. Moreover, HC often presents low initial Coulombic efficiency (ICE), which also limits the utilization of the battery capacity and energy density. Herein, nitrogen and phosphorus dual-doped HC (denoted as NPHC) with network structure is synthesized by a facile interfacial polymerization method, which endows the NPHC with synergistic effects of the enlarged interlayer spacing and improved conductivity. Consequently, the obtained NPHC exhibits a high reversible capacity (286 mAh g −1 at 0.1 A g −1 ), excellent rate capability (144 mAh g −1 at 10 A g −1 ), high ICE (71 %), and remarkable cyclability over 2000 cycles at 1 A g −1 . Moreover, the storage mechanism of sodium ions is examined by a series of ex-situ characterizations. Additionally, when coupled with Na 3 V 2 (PO 4 ) 2 F 3 as a cathode, the full cell delivers superior cyclability (capacity retains 90 % over 300 cycles at 1 A g −1 ). This work may shed new insight into designing other carbon-based electrode materials for high-performance energy storage. Graphical With hard carbon : we use a facile interfacial polymerization method to prepare hard carbon with N/P dual-doped (NPHC), which shows superb rate capability (286 and 144 mAh g −1 at 0.1 and 10 A g −1 , respectively). Through a series of analyses, NPHCS demonstrates a higher ion diffusion coefficient, capacitive contribution, and conductivity. This confirms that N/P dual-doping is more beneficial to improve electrochemical performance.
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
Energy Technology
·
2019
·Vol. 7
·期 11
·1900754
·
IF 3.163
Shikun Cheng,Qiang Ru,Zhenglu Shi,Yuqing Gao,Yang Liu,Xianhua Hou,Fuming Chen,Francis Chi-Chung Ling
Plant oil–inspired 3D flower-like Zn 3 V 3 O 8 nanospheres coupled with nitrogen doped (N-doped) carbon synthesized via the microemulsion/calcination strategy are used as anodes for lithium-/sodium-ion batteries (LIBs/SIBs). The synergistic interaction between the unique 3D flower-like structure and the existence of N-doped carbon can provide enough space to buffer volume expansion during the Li + /Na + intake/outlet process and enhance conductivity, respectively. Thus, the material delivers progressive electrochemical performance. Specifically, the Zn 3 V 3 O 8 nanospheres exhibit a reversible specific capacity of 1140.6 mAh g −1 after 200 cycles for LIBs and 113.0 mAh g −1 after 400 cycles for SIBs at a current density of 200 mA g −1 . Furthermore, the Zn 3 V 3 O 8 nanospheres electrode owns rate capability for LIBs such as 933.8, 847.9, 780.8, and 664.1 mAh g −1 at elevated current densities of 200, 400, 800, and 1600 mAh g −1 , respectively. In addition, it delivers reversible capacities of 207.5, 119.2, 74.1, and 42.7 mAh g −1 at 100, 200, 500, 1000, and 2000 mA g −1 for SIBs, respectively.
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
危险品化学品经营许可证（带存储）