Rice-like and rose-like zinc silicates anchored on amorphous carbon derived from natural reed leaves for high-performance supercapacitors

2021 ◽  
Author(s):  
Shaoqing Zhang ◽  
Yanyan Liu ◽  
Jiqi Zheng ◽  
Yang Mu ◽  
Hanmei Jiang ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
High Performance

3D N, S, P-doped rice-like C-Zn4Si2O7(OH)2•H2O (C-ZnSi-N2) and rose-like C-Zn2SiO4 (C-ZnSi-CO2) are derived from reed leaves and used for the application to supercapacitor. The as-prepared C-ZnSi architectures with a large...

Amorphous Carbon Nano-Interface-Modified Aluminum Anodes for High-Performance Dual-Ion Batteries

2021 ◽  
Author(s):  
Songqiao Peng ◽  
Xiaolong Zhou ◽  
Sarayut Tunmee ◽  
Zhongzhong Li ◽  
Pinit Kidkhunthod ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
High Performance

scholarly journals Facile Synthesis of Cobalt-Doped Porous Composites with Amorphous Carbon/Zn Shell for High-Performance Microwave Absorption

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 330 ◽  
Author(s):  
Qilei Wu ◽  
Huihui Jin ◽  
Bin Zhang ◽  
Siqi Huo ◽  
Shuang Yang ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Amorphous Carbon ◽  
Porous Carbon ◽  
High Performance ◽  
Impedance Matching ◽  
Broad Band ◽  
Matching Condition ◽  
Carbon Composite ◽  
Absorption Capacity ◽  
Zeolitic Imidazolate Framework

A facile method for the preparation of microwave absorbers with low density, high microwave absorptivity, and broad band is of paramount importance to the progress in practical application. Herein, commonly-used metal organic frameworks (MOFs) prepared just by mechanical stirring in methanol at room temperature were chosen as sacrificial templates to synthesize porous carbon composites with tunable dielectric and magnetic properties. With the replacement of Co atoms on the surface of zeolitic imidazolate framework-67 (ZIF-67) by Zn atoms, a Co-doped porous carbon composite with a low-dielectric amorphous carbon/Zn shell was constructed after annealing, leading to excellent impedance matching condition. Consequently, the as-obtained composite (Co/C@C-800) shows marvelous microwave absorption properties with an absorption capacity of −43.97 dB and a corresponding effective absorption bandwidth of 4.1 GHz, far exceeding that of the traditional porous carbon and composites directly derived from ZIF-67. The results provide a convenient way to modify MOFs for enhanced microwave absorption materials from the synergy of dielectric and magnetic losses.

scholarly journals Microwave Absorption of Crystalline Fe/MnO@C Nanocapsules Embedded in Amorphous Carbon

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Gaihua He ◽  
Yuping Duan ◽  
Huifang Pang
Keyword(s):  
Dielectric Loss ◽  
Amorphous Carbon ◽  
High Performance ◽  
Magnetic Loss ◽  
Synthesis Method ◽  
Domain Size ◽  
Carbon Matrix ◽  
Effective Bandwidth ◽  
General Duty ◽  
Enhanced Absorption

AbstractCrystalline Fe/MnO@C core–shell nanocapsules inlaid in porous amorphous carbon matrix (FMCA) was synthesized successfully with a novel confinement strategy. The heterogeneous Fe/MnO nanocrystals are with approximate single-domain size which gives rise to natural resonance in 2–18 GHz. The addition of MnO2 confines degree of graphitization catalyzed by iron and contributes to the formation of amorphous carbon. The heterogeneous materials composed of crystalline–amorphous structures disperse evenly and its density is significantly reduced on account of porous properties. Meanwhile, adjustable dielectric loss is achieved by interrupting Fe core aggregation and stacking graphene conductive network. The dielectric loss synergistically with magnetic loss endows the FMCA enhanced absorption. The optimal reflection loss (RL) is up to − 45 dB, and the effective bandwidth (RL < − 10 dB) is 5.0 GHz with 2.0 mm thickness. The proposed confinement strategy not only lays the foundation for designing high-performance microwave absorber, but also offers a general duty synthesis method for heterogeneous crystalline–amorphous composites with tunable composition in other fields.

Manipulation of 2D carbon nanoplates with a core–shell structure for high-performance potassium-ion batteries

2019 ◽  
Vol 7 (34) ◽  
pp. 19929-19938 ◽  
Author(s):  
Dongjun Li ◽  
Xiaolong Cheng ◽  
Rui Xu ◽  
Ying Wu ◽  
Xuefeng Zhou ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
Shell Structure ◽  
High Performance ◽  
Potassium Ion ◽  
Graphitic Carbon ◽  
Core Shell ◽  
Core Shell Structure

Quasi-2D core–shell amorphous carbon/graphitic carbon nanoplates (AC@GC) are designed, and they exhibit synergistic properties that enable the construction of superior K-ion batteries.

scholarly journals ZnO quantum dots anchored in multilayered and flexible amorphous carbon sheets for high performance and stable lithium ion batteries

2019 ◽  
Vol 7 (14) ◽  
pp. 8460-8471 ◽  
Author(s):  
Joseph F. S. Fernando ◽  
Chao Zhang ◽  
Konstantin L. Firestein ◽  
Jawahar Y. Nerkar ◽  
Dmitri V. Golberg
Keyword(s):  
Quantum Dots ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Amorphous Carbon ◽  
High Performance ◽  
Lithium Ion ◽  
Carbon Anode ◽  
Zno Quantum Dots

The role of the carbonaceous component in the excellent (de)lithiation properties of a ZnO/carbon anode material, as revealed by in situ TEM.

An Active Amorphous Carbon Material with Fe2C Nanocrystals Encapsulated as a High Performance Electrode for Lithium-Ion Batteries

2017 ◽  
Vol 2 (5) ◽  
pp. 1854-1859 ◽  
Author(s):  
Haiying Che ◽  
Yu-Shi He ◽  
Xiao-Zhen Liao ◽  
Hui-Juan Zhang ◽  
Weimin Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Amorphous Carbon ◽  
Carbon Material ◽  
High Performance ◽  
Lithium Ion

Alkali metal boosted atom rearrangement in amorphous carbon towards crystalline graphitic belt skeleton for high performance supercapacitors

2018 ◽  
Vol 15 ◽  
pp. 82-90 ◽  
Author(s):  
Chao Shi ◽  
Lintong Hu ◽  
Junxian Hou ◽  
Kai Guo ◽  
Tianyou Zhai ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Amorphous Carbon ◽  
High Performance
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