Unravelling the ion transport and the interphase properties of a mixed olivine cathode for Na-ion battery  

作　　者：Luca Minnetti Leonardo Sbrascini Antunes Staffolani Vittorio Marangon Francesco Nobili Jusef Hassoun 

机构地区：[1]School of Sciences and Technologies–Chemistry Division,University of Camerino,Via Madonna delle Carceri ChIP,62032 Camerino,Italy [2]Current affiliation:University of Bologna,Department of Chemistry“Giacomo Ciamician”,Via Francesco Selmi 2,40126 Bologna,Italy [3]Graphene Labs,Istituto Italiano di Tecnologia,via Morego 30,Genoa 16163,Italy [4]Department of Chemical,Pharmaceutical and Agricultural Sciences,University of Ferrara,Via Fossato di Mortara 17,44121 Ferrara,Italy [5]GISEL−Centro di Riferimento Nazionale per i Sistemi di Accumulo Elettrochimico di Energia,INSTM,Firenze 50121,Italy [6]National Interuniversity Consortium of Materials Science and Technology(INSTM)University of Ferrara Research Unit,University of Ferrara,Via Fossato di Mortara,17,44121 Ferrara,Italy

出　　处：《Journal of Energy Chemistry》2024年第9期300-317,共18页能源化学（英文版）

基　　金：performed within the grant "Fondo di Ateneo per la Ricerca Locale (FAR) 2022", University of Ferrara;the collaboration project "Accordo di Collaborazione Quadro 2015" between University of Ferrara (Department of Chemical and Pharmaceutical Sciences) and Sapienza University of Rome (Department of Chemistry);the European Union’s Horizon 2020 research and innovation programme Graphene Flagship, grant agreement No 881603

摘　　要：The replacement of Li by Na in an analogue battery to the commercial Li-ion one appears a sustainable strategy to overcome the several concerns triggered by the increased demand for the electrochemical energy storage.However,the apparently simple change of the alkali metal represents a challenging step which requires notable and dedicated studies.Therefore,we investigate herein the features of a NaFe_(0.6)Mn_(0.4)PO_(4)(NFMP)cathode with triphylite structure achieved from the conversion of a LiFe_(0.6)Mn_(0.4)PO_(4)(LFMP)olivine for application in Na-ion battery.The work initially characterizes the structure,morphology and performances in sodium cell of NFMP,achieving a maximum capacity exceeding 100 mAh g^(−1)at a temperature of 55℃,adequate rate capability,and suitable retention confirmed by ex-situ measurements.Subsequently,the study compares in parallel key parameters of the NFMP and LFMP such as Na^(+)/Li^(+)ions diffusion,interfacial characteristics,and reaction mechanism in Na/Li cells using various electrochemical techniques.The data reveal that relatively limited modifications of NFMP chemistry,structure and morphology compared to LFMP greatly impact the reaction mechanism,kinetics and electrochemical features.These changes are ascribed to the different physical and chemical features of the two compounds,the slower mobility of Na^(+)with respect to Li^(+),and a more resistive electrode/electrolyte interphase of sodium compared with lithium.Relevantly,the study reveals analogue trends of the charge transfer resistance and the ion diffusion coefficient in NFMP and LFMP during the electrochemical process in half-cell.Hence,the NFMP achieved herein is suggested as a possible candidate for application in a low-cost,efficient,and environmentally friendly Na-ion battery.

关 键 词：NaFe_(0.6)Mn_(0.4)PO_(4)NFMP Olivine Na-ion lon transport INTERPHASE 

分 类 号：TM912[电气工程—电力电子与电力传动]