scholarly journals Polythiophene coated aromatic polyimide enabled ultrafast and sustainable lithium ion batteries

2017 ◽  
Vol 5 (46) ◽  
pp. 24083-24090 ◽  
Author(s):  
Hailong Lyu ◽  
Jiurong Liu ◽  
Shannon Mahurin ◽  
Sheng Dai ◽  
Zhanhu Guo ◽  
...  
Keyword(s):  
Composite Electrode ◽  
Electrode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Chemical Oxidation ◽  
High Rate ◽  
Aromatic Polyimide ◽  
Chemical Oxidation Polymerization ◽  
Polymerization Method

Organic composite electrode materials based on aromatic polyimide (PI) and electron conductive polythiophene (PT) have been prepared by a facile in situ chemical oxidation polymerization method. The optimized composite electrode PI30PT delivers a remarkable high-rate cyclability, achieving a high capacity of 89.6 mA h g−1 at 20 C with capacity retention of 94% after 1000 cycles.

Enhanced cycling stability of silicon anode by in situ polymerization of poly(aniline-co-pyrrole)

RSC Advances ◽  
2014 ◽  
Vol 4 (96) ◽  
pp. 54134-54139 ◽  
Author(s):  
Qingtao Wang ◽  
Ruirong Li ◽  
Dong Yu ◽  
Xiaozhong Zhou ◽  
Jian Li ◽  
...  
Keyword(s):  
Anode Material ◽  
In Situ Polymerization ◽  
Chemical Oxidation ◽  
Silicon Anode ◽  
Composite Anode ◽  
Chemical Oxidation Polymerization ◽  
Si Nanoparticles ◽  
Polymerization Method ◽  
Poly Aniline

Poly(aniline-co-pyrrole)-encapsulated Si nanoparticles composite anode material were prepared by an in situ chemical oxidation polymerization method.

A Li-rich Layered@Spinel@Carbon heterostructured cathode material for high capacity and high rate lithium-ion batteries fabricated via an in situ synchronous carbonization-reduction method

2015 ◽  
Vol 3 (7) ◽  
pp. 3995-4003 ◽  
Author(s):  
Qingbing Xia ◽  
Xinfu Zhao ◽  
Mingquan Xu ◽  
Zhengping Ding ◽  
Jiatu Liu ◽  
...  
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Reduction Method ◽  
High Capacity ◽  
Lithium Ion ◽  
High Rate ◽  
Nano Coating

A Li-rich Layered@Spinel@Carbon heterostructured cathode material for LIBs, which comprises Li-rich layered core, a spinel interlayer and a carbon nano-coating.

scholarly journals Preparation of PANI Modified ZnO Composites via Different Methods: Structural, Morphological and Photocatalytic Properties

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1025
Author(s):  
Nazli Turkten ◽  
Yunus Karatas ◽  
Miray Bekbolet
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Oxidation ◽  
Emeraldine Base ◽  
Hybridization Method ◽  
X Ray ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Ft Ir ◽  
Polymerization Method

Polyaniline modified zinc oxide (PANI-ZnO) photocatalyst composites were synthesized by focusing on dissolution disadvantage of ZnO. In-situ chemical oxidation polymerization method was performed under neutral conditions (PANI-ES) whereas in hybridization method physical blending was applied using emeraldine base of polyaniline (PANI-EB). PANI-ZnO composites were prepared in various ratios of aniline (ANI) to ZnO as 1%, 3%, 6% and 9%. The alterations on the structural and morphological properties of PANI-ZnO composites were compared by Fourier Transform Infrared (FT-IR), Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive X-ray Analysis Unit (SEM-EDAX) techniques. FT-IR and Raman spectroscopy confirmed the presence of PANI in all composites. SEM images revealed the morphological differences of PANI-ZnO composites based on PANI presence and preparation methods. Photocatalytic performances of PANI-ZnO specimens were investigated by following the degradation of methylene blue (MB) in aqueous medium under UVA irradiation. The effects of catalyst dose and initial dye concentration were also studied. MB degradation was followed by both decolorization extents and removal of aromatic fractions. PANI-ZnO composites expressed enhanced photocatalytic performance (~95% for both methods) as compared to sole ZnO (~87%). The hybridization method was found to be more efficient than the in-situ chemical oxidation polymerization method emphasizing the significance of the neutral medium.

In Situ Observation of the Electrochemical Lithiation of a Single SnO2 Nanowire Electrode

Science ◽  
2010 ◽  
Vol 330 (6010) ◽  
pp. 1515-1520 ◽  
Author(s):  
Jian Yu Huang ◽  
Li Zhong ◽  
Chong Min Wang ◽  
John P. Sullivan ◽  
Wu Xu ◽  
...  
Keyword(s):  
Reaction Front ◽  
Tin Dioxide ◽  
Electrode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Liquid Electrolyte ◽  
In Situ Observation ◽  
Ionic Liquid Electrolyte ◽  
Transmission Electron

We report the creation of a nanoscale electrochemical device inside a transmission electron microscope—consisting of a single tin dioxide (SnO2) nanowire anode, an ionic liquid electrolyte, and a bulk lithium cobalt dioxide (LiCoO2) cathode—and the in situ observation of the lithiation of the SnO2 nanowire during electrochemical charging. Upon charging, a reaction front propagated progressively along the nanowire, causing the nanowire to swell, elongate, and spiral. The reaction front is a “Medusa zone” containing a high density of mobile dislocations, which are continuously nucleated and absorbed at the moving front. This dislocation cloud indicates large in-plane misfit stresses and is a structural precursor to electrochemically driven solid-state amorphization. Because lithiation-induced volume expansion, plasticity, and pulverization of electrode materials are the major mechanical effects that plague the performance and lifetime of high-capacity anodes in lithium-ion batteries, our observations provide important mechanistic insight for the design of advanced batteries.

Unveiling the SEI Formation in a Potassium Ion Battery Using Distribution of Relaxation Time

2020 ◽  
Author(s):  
Yuhui Chen ◽  
Chuanchao Sheng ◽  
Fengjiao Yu ◽  
Chunmei Li ◽  
Heng Zhang ◽  
...  
Keyword(s):  
Relaxation Time ◽  
High Performance ◽  
Composite Electrode ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Low Cost ◽  
Solid Electrolyte Interphase ◽  
High Capacity ◽  
Sei Layer

Abstract Understanding of solid electrolyte interphase (SEI) formation process in novel battery systems is of primary importance. Alongside increasing powerful in-situ techniques, searching for readily-accessible, non-invasive, and low-cost tools to probe battery chemistry is highly demanded. Here, we applied distribution of relaxation time (DRT) analysis to interpret in-situ electrochemical impedance spectroscopy results during cycling, which is able to distinguish various electrochemical processes based on their time constants. By building direct link between SEI layer and the cell performances, it allows us track the formation and evolution process of SEI layer, diagnose the failure of cell, and unveil the reaction mechanism. For instance, in a K-ion cell using SnS2/N-doped reduced graphene oxide (N-rGO) composite electrode, we found that the ion-transport in the electrolyte phase is the main reason of cell deterioration. In the electrolyte with potassium bis(fluorosulfonyl)imide (KFSI), the porous structure of the composite electrode was reinforced by rapid formation of a robust SEI layer at SnS2/electrolyte interface and thus the KFSI-based cell delivers a high capacity and good cycleability. This method lowers the barrier of in-situ EIS analysis, and helps public researchers to explore high-performance electrode materials.

Engineering flexible carbon nanofibers concatenated MOFs-derived hollow octahedral CoFe2O4 as anode materials for enhanced lithium storage

2021 ◽  
Author(s):  
Fangfang Xue ◽  
Yangyang Li ◽  
Chen Liu ◽  
Zhigang Zhang ◽  
Jun Lin ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Anode Materials ◽  
Electrode Materials ◽  
Electronic Devices ◽  
High Capacity ◽  
Lithium Ion ◽  
Lithium Storage ◽  
Excellent Mechanical Property ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Constructing suitable electrode materials with high capacity and excellent mechanical property is indispensable for flexible lithium-ion batteries (LIBs) to satisfy the growing flexible and wearable electronic devices. Herein, a necklace-like...

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