Electrode capacity and voltage performance of lithium iron phosphate - polyaniline coin cell battery

• Published in: Journal of physics. Conference series Vol. 1080; no. 1; pp. 12039 - 12043
• Main Authors: Rahayu, I, Wijayati, A, Noviyanti, A R, Hidayat, S, Risdiana
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2018
• Subjects: Battery cycles; Cathodes; Cobalt oxides; Conducting polymers; Electric potential; Electrical resistivity; Electrodes; Electronic devices; Energy storage; Flux density; Iron; Lithium; Lithium compounds; Lithium-ion batteries; Physics; Polyanilines; Polyvinylidene fluorides; Portable equipment; Rechargeable batteries; Thermal stability; Voltage
• DOI: 10.1088/1742-6596/1080/1/012039
• ISSN: 1742-6588

Battery is the main component in many portable electronic devices that serves as energy storage. Lithium cobalt oxide (LiCoO2) is one of the most popular types of lithium-ion battery due to its low self-discharge and high energy density. However, LiCoO2 is toxic to the environment, thus a safer material is important to be studied. A non-toxic and thermally stable lithium iron phosphate (LiFePO4) could be a good alternative for battery material. Nevertheless, the low electrical conductivity of LiFePO4 (10-9 S.cm-1) should be enhanced by using a conductive polymer, such as polyaniline (PANI), to form a composite. This study aims to investigate the electrode capacity of the coin cell battery composite using galvanostatic cycle and to examine its voltage performance using the cyclic voltammetry methods. The cathode was prepared in powder form. The composite was assembled in the form of coin cell battery. It consists of lithium, lithium hexafluorophosphate-ethylene carbonate-dimethyl carbonate, and lithium iron phosphate-polyaniline-polyvinylidene fluoride as the anode, electrode, and cathode, respectively. It is found that the electrode capacity of [Li|1 M LiPF6/EC DMC|LiFePO4-PANI-PVDF] coin cell battery was 38 mA h g-1 with a working voltage of 3.6 - 4.0 V.