scholarly journals The Synthesis of a Covalent Organic Framework from Thiophene Armed Triazine and EDOT and Its Application as Anode Material in Lithium-Ion Battery

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3300
Author(s):  
Shuang Chen ◽  
Shukun Wang ◽  
Xin Xue ◽  
Jinsheng Zhao ◽  
Hongmei Du
Keyword(s):  
Composite Material ◽  
Band Gap ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Carbon Powder ◽  
Covalent Organic Framework ◽  
Organic Framework

As a class of redox active materials with some preferable properties, including rigid structure, insoluble characters, and large amounts of nitrogen atoms, covalent triazine frameworks (CTFs) have been frequently adopted as electrode materials in Lithium-ion batteries (LIBs). Herein, a triazine-based covalent organic framework employing 3,4-ethylenedioxythiophene (EDOT) as the bridging unit is synthesized by the presence of carbon powder through Stille coupling reaction. The carbon powder was added in an in-situ manner to overcome the low intrinsic conductivity of the polymer, which led to the formation of the polymer@C composite (PTT-O@C, PTT-O is a type of CTFs). The composite material is then employed in LIBs as anode material. The designed polymer shows a narrow band gap of 1.84 eV, proving the effectiveness of the nitrogen-enriched triazine unit in reducing the band gap of the resultant polymers. The CV results showed that the redox potential of the composite (vs. Li/Li+) is around 1.0 V, which makes it suitable to be used as the anode material in lithium-ion batteries. The composite material could exhibit the stable specific capacity of 645 mAh/g at 100 mA/g and 435 mAh/g at 500 mA/g, respectively, much higher than the pure carbon materials, indicating the good reversibility of the material. This work provides some additional information on electrochemical performance of the triazine and EDOT based CTFs, which is helpful for developing a deep understanding of the structure–performance correlations of the CTFs as anode materials.

A dehydrobenzoannulene-based two-dimensional covalent organic framework as an anode material for lithium-ion batteries

2020 ◽  
Vol 5 (1) ◽  
pp. 97-101 ◽  
Author(s):  
Eric R. Wolfson ◽  
Neng Xiao ◽  
Luke Schkeryantz ◽  
W. Karl Haug ◽  
Yiying Wu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Lithium Ion ◽  
Porous Polymer ◽  
Two Dimensional ◽  
Covalent Organic Framework ◽  
Redox Active ◽  
Organic Framework

A redox-active dehydrobenzoannulene (DBA) monomer was used to construct an efficient porous polymer-based anode material for lithium ion batteries (LIBs).

scholarly journals Advances in the Applications of Graphene-Based Nanocomposites in Clean Energy Materials

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Yiqiu Xiang ◽  
Ling Xin ◽  
Jiwei Hu ◽  
Caifang Li ◽  
Jimei Qi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fuel Cells ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Clean Energy ◽  
Proton Exchange ◽  
Energy Storage And Conversion ◽  
Thermoelectric Conversion

Extensive use of fossil fuels can lead to energy depletion and serious environmental pollution. Therefore, it is necessary to solve these problems by developing clean energy. Graphene materials own the advantages of high electrocatalytic activity, high conductivity, excellent mechanical strength, strong flexibility, large specific surface area and light weight, thus giving the potential to store electric charge, ions or hydrogen. Graphene-based nanocomposites have become new research hotspots in the field of energy storage and conversion, such as in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion. Graphene as a catalyst carrier of hydrogen fuel cells has been further modified to obtain higher and more uniform metal dispersion, hence improving the electrocatalyst activity. Moreover, it can complement the network of electroactive materials to buffer the change of electrode volume and prevent the breakage and aggregation of electrode materials, and graphene oxide is also used as a cheap and sustainable proton exchange membrane. In lithium-ion batteries, substituting heteroatoms for carbon atoms in graphene composite electrodes can produce defects on the graphitized surface which have a good reversible specific capacity and increased energy and power densities. In solar cells, the performance of the interface and junction is enhanced by using a few layers of graphene-based composites and more electron-hole pairs are collected; therefore, the conversion efficiency is increased. Graphene has a high Seebeck coefficient, and therefore, it is a potential thermoelectric material. In this paper, we review the latest progress in the synthesis, characterization, evaluation and properties of graphene-based composites and their practical applications in fuel cells, lithium-ion batteries, solar cells and thermoelectric conversion.

LixCn as Anode Material for Lithium Ion Batteries

2006 ◽  
Vol 972 ◽  
Author(s):  
Haiming Xie ◽  
Haiying Yu ◽  
Abraham F. Jalbout ◽  
Guiling Yang ◽  
Xiumei Pan ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Cathode Materials ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Limiting Factors ◽  
Discharge Process ◽  
Metal Foil ◽  
Lithium Metal ◽  
Lithium Secondary Batteries

AbstractWe design a way that the anode hosts provide lithium ion in lithium ion battery operation. If the limiting factors of the cathode materials are less, there will be more alternatives for it. It was proven to be successful by two kinds of test cells based on LixCn as anode material, and β-FeOOH or Cr8O21 as cathode materials. Their theoretical capacities are much higher than those present electrode materials. Unlike the lithium secondary batteries with lithium metal foil or lithium alloy as anode, this type of lithium ion batteries with LixCn as anode prohibit dendrite formation during charging-discharge process. The idea of lithium ion sources coming from the anode can come true successfully as a result that steady protecting solution be sought for LixCn.

scholarly journals Porous carbon derived from metal–organic framework@graphene quantum dots as electrode materials for supercapacitors and lithium-ion batteries

RSC Advances ◽  
2019 ◽  
Vol 9 (17) ◽  
pp. 9577-9583 ◽  
Author(s):  
Hui Yu ◽  
Wenjian Zhu ◽  
Hu Zhou ◽  
Jianfeng Liu ◽  
Zhen Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lithium Ion Batteries ◽  
Porous Carbon ◽  
Electrode Materials ◽  
Metal Organic Framework ◽  
Graphene Quantum Dots ◽  
Lithium Ion ◽  
Simple Method ◽  
Metal Organic ◽  
Organic Framework

The C@GQD composite was prepared by the combination of metal–organic framework (ZIF-8)-derived porous carbon and graphene quantum dots (GQDs) by a simple method.

Metal–organic framework derived amorphous VOx coated Fe3O4/C hierarchical nanospindle as anode material for superior lithium-ion batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (32) ◽  
pp. 16901-16909
Author(s):  
Bowen Cong ◽  
Yongyuan Hu ◽  
Shanfu Sun ◽  
Yu Wang ◽  
Bo Wang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Coulombic Efficiency ◽  
Metal Organic Framework ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Rate Performance ◽  
Metal Organic ◽  
High Coulombic Efficiency ◽  
Organic Framework

A novel Fe3O4/C@VOx hierarchical nanospindle anode material for LIBs has been successfully designed and fabricated through a MOF-derived route, which delivers high coulombic efficiency, outstanding cycling stability and rate performance.

Flexible Graphene Paper as a Binder-Free Anode Material for Lithium Ion Batteries

2015 ◽  
Vol 1095 ◽  
pp. 333-340
Author(s):  
Chuan Ning Yang ◽  
Yong Quan Qing ◽  
Chang Sheng Liu
Keyword(s):  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Cycling Performance ◽  
High Temperature Treatment ◽  
Great Promise ◽  
Binder Free ◽  
Graphene Paper

Graphene paper (GP) with layered structure and highly conductive network is fabricated by a facile technique of vacuum filtration and studied as a single-component and binder-free anode of lithium ion batteries (LIBs). The process of fabrication of GP without any binder and high-temperature treatment, in the meantime, great improvement in both the capacity and cycling performance of the GP electrodes have compared with other kinds of traditional graphite electrode materials. Given the simplifying anode fabrication, low manufacturing costs and many electrochemical properties of the GP anode, it is regarded as an excellent anode material of LIB with great promise for its both excellent cycling performance and electrochemical properties. The specific capacity can reach to over 200 mAhg-1after 60 charge-discharge cycles under the current rate of 50 mAg-1.

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