Work

Revisit of Polypyrrole as Cathode Material for Lithium-Ion Battery

Year: 2012

Type: article

Abstract: Conducting polymer polypyrrole (PPy) was revisited as cathode material for lithium-ion battery. Synthesis condition, microstructure, doping effect and electrochemical performance were systematically investigated. Chemical polymerization was employed to synthesize PPy with sodium p-toluenesulfonate (pTSNa) as anionic dopant. Fe 2 (SO 4 ) 3 · x H 2 O, ammonium persulfate (APS) and FeCl 3 ·6H 2 O were used as oxidants respectively. The product was carefully characterized by elemental analysis, conductivity measurement, scanning electron microscopy, Fourier transform infrared spectroscopy and electrochemical impedance spectroscopy. Experiments show that the oxidant and the molar ratio of pTSNa to monomer pyrrole (Py) strongly influence the yield, conductivity, composition, structure, morphology and electrochemical performance. As a cathode material, the PPy obtained with Fe 2 (SO 4 ) 3 · x H 2 O as oxidant at [pTSNa]/[Py] = 2.0 exhibits the best performance, which gives a discharge capacity up to 122.5 mAh g −1 at current density of 7.2 mA g −1 and a capacity retention of 89.9% after 600 cycles at 72 mA g −1 .

Source: Journal of The Electrochemical Society

DOI: 10.1149/2.042210jes

Authors: Long Qie, Li-Xia Yuan, Wu-Xing Zhang, Wei-Min Chen, Yun-Hui Huang

Institutions: State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology

Language: English

Topic: Advancements in Battery Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: National Natural Science Foundation of China, Huazhong University of Science and Technology, National High-tech Research and Development Program, Program for Changjiang Scholars and Innovative Research Team in University