The study of electrical and magnetic properties of LiPF6 doped polyaniline

Joo, Jinsoo; Song, Hebok; Jeong, Chan-Hui; Baeck, Ju-Heyuck; Lee, J.K.; Ryu, Kwang Sun

doi:10.1016/s0379-6779(98)00193-3

Cited by 21 publications

(6 citation statements)

References 20 publications

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“…Applications of polyanilines include rechargeable batteries,5–7 electrochromic display devices,8, 9 corrosion protection,10, 11 sensors,12–15 electrocatalysis16 and capacitors 17, 18. Numerous methods have been proposed to improve the conductivity, degradation resistance and processibility of polyaniline, such as copolymerization,19–22 chemical modification,23 doping with bulky ions24–26 and ionic polymers,27–30 non‐aqueous polymerization31 and ion‐implantation 32. Copolymerization with aniline derivatives, especially N ‐substituted derivatives, was extensively reported,33–36 though the conductivity of the copolymers was always lower than that of polyaniline itself.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of conducting copolymers from aniline and o‐anisidine in HCl solutions

Rehan

Al‐Mazroa²,

Al‐Fawzan³

2003

Polymer International

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Conducting poly(aniline-co-o-anisidine) (PAS) films with different ratios of aniline units in the polymer chain were prepared by oxidative polymerization of different molar ratios of aniline and o-anisidine in 1 M HCl using cyclic voltammetry. Due to the much higher reactivity of o-anisidine, the structure and properties of PASs were found to be dominated by the o-anisidine units. The polymerization of poly-o-anisidine and PASs followed zero-order kinetics with respect to formation of the polymer (film thickness) and the autocatalytic polymerization of aniline was completely inhibited. In contrast to polyaniline, a decrease in the polymerization temperature was found to increase the amount of copolymer formed and its redox charge. The presence of aniline units in PASs led to a pronounced increase in the molecular weight and conductivity, and a decrease in the solubility in organic solvents. Repetitive charging/discharging cycles showed that PASs resist degradation more than polyaniline.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of conducting copolymers from aniline and o‐anisidine in HCl solutions

Rehan

Al‐Mazroa²,

Al‐Fawzan³

2003

Polymer International

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“…is associated with The polaronic structure of PAni gives the absorption peak at 1296 cm -1 . The bands at 878 and 799 cm −1 correspond to PAni in the para-disubstituted aromatic ring formation [17,18]. The stretching mode of C-N bond corresponds to the peak at 1296 cm −1 .…”

Section: A Ir Spectroscopymentioning

confidence: 97%

Structural and Electrical Properties of LiClO4 Doped PAni Composite Films

Chauhan¹

2019

IJRASET

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Conductive Polyaniline PAni was synthesized chemical oxidative polymerization the chemical route. PAni thus synthesized was in-situ doped with HCl acid and Lithium perchlorate in different weight percentage. PAni and its different doped variant thin films were deposited on plain soda glass and conducting ITO glass using CBD technique. Samples of different configurations are characterized for structural consistency with X-ray, for chemical identification with FTIR, for thermal integration with DSC. Electric measurements such as capacitance and conductance were carried out using LCR bridge and Four Probe arrangements respectively. X-ray analysis divulges largely the polycrystalline nature of PAni and LiClO 4 doped variant. IR study in Fourier transformed mode reveals PAni and its doped variants maintains their structural integrity in good agreement with standard pronounced peaks in the region of 2000-3500 cm-1 , though displaced hydrogen bonds in doped PAni leads to a slight shifting. Significant thermal stability for doped and undoped Polyaniline nearly up to 200 0 C is noted with DSC. Dielectric measurements with variable temperature in the frequency range 50 Hz-2 MHz yields the capacitance variation, confirming the interfacial polarization within the PAni matrix. Lithium Conductivity of 6.19 Sm-1 for lithium perchlorate doped PAni again affirms exitance of bipolarons at greater level of oxidation.

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“…The decrease of ionic resistance could be attributed to two aspects, one is inhibiting the side reactions and building the stable solid electrolyte interface (SEI) film, and the other is shortening ion transport path by promoting the wettability of the electrode material with electrolyte swelling CPs. [ 32,33 ] In addition, the intercalated CPs can also enhance the ion diffusion of electrode material by reducing the charge density through the expanding of interlayer distance during charging and discharging.…”

Section: Conductive Mechanismmentioning

confidence: 99%

“…Second, the self‐healing and doping properties of CPs can effectively prevent the contact between the electrode and electrolyte directly, while absorbing by‐products rooted in the decomposition of electrolyte to weaken the damage for electrode. [ 30–33 ] Third, the coated and intercalated CPs could enhance the stability of composite electrode during charge and discharge, and also effectively prevent the phase transition, pulverization, and collapse of the active material. [ 34,35 ] Furthermore, the carbon material obtained by carbonization of CPs also have these advantages of higher stability compared with CPs precursor while inhibiting side reactions and improving electron transport brought by doping heteroatomic atoms.…”

Section: Introductionmentioning

confidence: 99%

Recent Progresses on Applications of Conducting Polymers for Modifying Electrode of Rechargeable Batteries

Zhang

Wang

et al. 2021

Adv Energy and Sustain Res

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In recent years, the rapid development of electric vehicles, smart grids, and portable electronic devices have given a boost to energy storage devices represented by rechargeable batteries. Seeking for reliable security, cost‐effectiveness, and especially high energy density of rechargeable batteries is the crucial demand. The key to improve energy density of rechargeable batteries is adopting high theoretical capacity electrodes or reducing the content of nonredox components. Unfortunately, some problems such as poor cycle stability and low rate performance caused by poor conductivity and unstable structure limit the application of high‐capacity electrodes. Conducting polymers (CPs) are widely used to modify electrode materials to promote the carrier transport and suppress the volume expansion during cycles due to their good conductivity, electroactivity, and machinability. In this Review, the conductive mechanisms, synthesis methods, and the applications in modifying electrodes with CPs are discussed. Also, the recent progresses about CPs‐modified electrodes including coating, intercalation, and carbonization in rechargeable batteries are summarized. Finally, the challenges and the further developments for modifying electrodes with CPs, which aims to provide the assistance for developing high‐performance CPs composite electrodes, are proposed.

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The study of electrical and magnetic properties of LiPF6 doped polyaniline

Cited by 21 publications

References 20 publications

Synthesis and characterization of conducting copolymers from aniline and o‐anisidine in HCl solutions

Synthesis and characterization of conducting copolymers from aniline and o‐anisidine in HCl solutions

Structural and Electrical Properties of LiClO4 Doped PAni Composite Films

Recent Progresses on Applications of Conducting Polymers for Modifying Electrode of Rechargeable Batteries

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