Sammanfattning
A coulometric signal readout method, which was originally developed for solid-contact ion-selective electrodes, was investigated in this work using LiMn2O4 (LMO) as a combined ion-recognition and signal-transduction layer. The redox process of LMO, which is associated with reversible intercalation/expulsion of Li+ ions, allowed coulometric sensing of Li+ ions in aqueous solutions. On increasing the active area (mass loading) of LMO, the coulometric signal increased for a given change in Li+ ion activity. The excellent redox reversibility of LMO and its relatively low resistance were instrumental in achieving a high signal amplification together with a relatively fast response. Coating the LMO layer with a conventional Li+-selective plasticized PVC membrane was found to dramatically lower the coulometric response. Hence, the application of LMO as a combined Li+-selective electrode material and ion-to-electron transducer was found to be highly compatible with the coulometric signal readout method, especially for detecting small Li+ activity changes at high Li+ concentrations.
Originalspråk | Engelska |
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Artikelnummer | 107302 |
Antal sidor | 7 |
Tidskrift | Electrochemistry Communications |
Volym | 139 |
DOI | |
Status | Publicerad - 2022 |
MoE-publikationstyp | A1 Tidskriftsartikel-refererad |
Fingeravtryck
Fördjupa i forskningsämnen för ”Coulometric ion sensing with Li+-selective LiMn2O4 electrodes”. Tillsammans bildar de ett unikt fingeravtryck.Utrustning
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Åbo Akademi Functional Printing Center
Martti Toivakka (PI), Jessica Rosenholm (PI), Nicklas Anttu (PI), Johan Bobacka (PI), Tan Phat Huynh (PI), Jouko Peltonen (PI), Xiaoju Wang (PI), Carl-Eric Wilen (PI), Chunlin Xu (PI), Hongbo Zhang (PI) & Ronald Österbacka (PI)
Fakulteten för naturvetenskaper och teknikUtrustning/facilitet: Facilitet