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Investigation of electrochemical properties of sodium ion intercalation into Fe2V4O13

Investigation of electrochemical properties of sodium ion intercalation into Fe2V4O13
Kim, Hyeon Jin
DGIST Authors
Kim, Hyeon Jin; Hong, Seung Tae; Kim, Jae Hyeon
Hong, Seung Tae
Kim, Jae Hyeon
Issue Date
Available Date
Degree Date
2016. 2
rechargeable sodium batterystructureFe2V4O13sodium intercalationcathodehost material for sodium battery
The necessity of large-scale energy storage systems (ESS) have become vigorously issued in energy conversion research field. Especially, rechargeable sodium ion batteries have the benefits of low material cost and earth abundant. However, since the size of Na+ ion is larger than the Li+ ion does, it is challenge to find host materials with large enough interstitial site. In effort to overcome this challenge, we approach of searching for wide tunnel structure with controlling the size of materials. Submicron sized crystalline Diiron(III) Tetravanadate(V), Fe2V4O13, is prepared by the liquid precipitation synthesis technique and characterized by X-ray diffraction (XRD), Rietveld refinement, and scanning electron microscope (SEM). It was found that Fe2V4O13 has the monoclinic system which has ellipse shape like fairly large tunnel, compare to other cathode host materials. Although many other cathode battery storage systems have been researched such as sodium ion batteries, lithium ion batteries, or several multivalent ion batteries, studies on the Fe2V4O13 is insufficient. Herein, by using the Fe2V4O13 as a host material for Na-ion batteries, the X-ray diffraction pattern changes of NaxFe2V4O13 (0≤x≤1.0) upon insertion/extraction of Na-ion into/from host-framework analyzed through using ex-situ powder X-ray diffraction. ⓒ 2016 DGIST
Table Of Contents
1.Introduction 1 -- 1.1 The ubiquitous issue: Developing energy storage system (ESS) 1 -- 1.2 A pioneer discover for ESS: Rechargeable battery system 4 -- 1.3 Alternative energy source: Sodium-ion batteries 6 -- 1.4 Theoretical background 8 -- 1.4.1 Electrolyte 8 -- 1.4.2 Solid electrolyte interphase (SEI) layer 8 -- 1.5 Important studies have been achieved on electrode material for SIBs 9 -- 1.5.1 Positive sodium ion electrode materials 9 -- Layered structure base 10 -- NASICON-type material 11 -- Olivine type structure base 12 -- Sodium vanadium fluorophosphates base 13 -- 1.6 1-Dimensional structure of Fe2V4O13 14 -- 2. Experiments 16 -- 2.1 Preparation of submicron size crystalline Fe2V4O13 16 -- 2.1.1 Wet chemical process 16 -- 2.1.2 Filtration 16 -- 2.1.3 Amorphous to crystallization: Calcination 16 -- 2.2 Physiochemical and electrochemical characterization 18 -- 2.2.1 Electrode preparation with hand-made beaker type cell 18 -- 2.2.2 Electrochemical operational mechanisms of the sodium ion capacitor 21 -- 2.3 Electrochemical characterization 24 -- 3. Results and Discussion 25 -- 3.1 Morphology and XRD study of Fe2V4O13 25 -- 3.2 Electrochemical properties 30 -- 3.2.1 Cyclic voltammetry and galvanostatic cycle profiles 30 -- 3.2.2 C-rate performance profiles 32 -- 3.2.3 Ex-situ XRD and unit cell parameters 33 -- 3.2.4 EDX element analysis of Fe2V4O13 35 -- 4. Conclusions 38 --
Energy Systems Engineering
Energy Science and EngineeringThesesMaster

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