Comprehensive Interfacial Mechanisms of LiMnPO4-MWCNT Composite ratios in Acidic Aqueous Electrolyte. (1st November 2017)

• Record Type: Journal Article
• Authors: Chiu, Tse-Ming; Barraza-Fierro, J.I.; Castaneda, H.
• Is Part Of: Electrochimica acta. Volume 253(2017)
• Page Start: 93
• Page End: 103
• Publication Date: 2017-11-01
• Subjects: LiMnPO4 -- multiwall-carbon nanotubes -- aqueous rechargeable ion-lithium batteries -- electrochemical impedance modeling; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.09.018
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: Electrochemical characterization of LiMnPO4 composite in acidic aqueous electrolyte. Probabilistic/deterministic modeling for electrode microstructure quantification. Quantify kinetic parameters via geometrical guided transmission line modeling Abstract: A comprehensive electrochemical characterization was performed for different compositions of LiMnPO4 electrodes with additions of multi-walled carbon nanotubes (MWCNTs). Electrochemical testing based on DC and AC techniques helped to perform a quantitative analysis to corroborate the influence of the activation processes at the interface and the overall performance of the cathodes. The step-control process for the composite/electrolyte interface is influenced by the MWCNTs content at different bias potentials. The threshold saturation of MWCNTs was determined experimentally by materials characterization, electrochemical techniques, and theoretically by probability-deterministic transmission line modeling (TLM). TLM was coupled with the LiMnPO4 particle size distribution and the electrode microstructural variability to quantify interfacial mechanisms.