Investigation on Electrode/Electrolyte Interfaces through Impedance Spectroscopy

Title

Investigation on Electrode/Electrolyte Interfaces through Impedance Spectroscopy

Creator

Money B.K.; Saji J.; Hariharan K.

Description

In the present paper, impedance measurements of the battery configuration, Anode?lithium borophosphate glass electrolyte?LiCoO2 cathode, has been carried out to throw some light on the electrochemical interfacial behavior between the chosen electrodes and electrolyte. The cathode material, lithium cobalt oxide (LiCoO2) has been prepared by three different techniques and characterized. Sol-gel synthesized LiCoO2 showed uniformly distributed spherical shape particles with an average size of 500 nm and also exhibited better electrochemical performance. Charging and discharging (23 cycles) of the battery indicated an OCV of 2 V. However, the theoretical OCV of 4 V could not be achieved. The poor performance of the battery could be attributed to the electrochemical processes and SEI film formation at the electrode/electrolyte interfaces. Impedance spectroscopy shows that the major contributions to the impedance of the battery are the electrolyte resistance and the electrode/electrolyte interfacial resistance. With each recharging cycle, the value of electrolyte resistance remains almost constant; however, the interface resistance increases, during the passage of current, due to the interfacial passive layer formation. 2020 Taylor & Francis Group, LLC.

Source

Integrated Ferroelectrics, Vol-212, No. 1, pp. 96-103.

Date

2020-01-01

Publisher

Taylor and Francis Ltd.

Subject

Cathode; interfaces; solid electrolyte interface (SEI)

Coverage

Money B.K., Department of Sciences & Humanities, Faculty of Engineering, CHRIST University, Bangalore, India; Saji J., Department of Sciences & Humanities, Faculty of Engineering, CHRIST University, Bangalore, India; Hariharan K., Department of Physics and Centre for Sponsored Research & Consultancy, Rajalakshmi Engineering College, Anna University, Chennai, India

Rights

Restricted Access

Relation

ISSN: 10584587; CODEN: IFERE

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1080/10584587.2020.1819039

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85095931766&doi=10.1080%2f10584587.2020.1819039&partnerID=40&md5=984b627b9b1e2353db1e6f3fa72cf1bb