Thermal Characteristics of Conversion-Type FeOF Cathode in Li-ion Batteries
Source abstract
Abstract
Rutile FeOF was used as a conversion-type cathode material for Li-ion batteries. In the present study, 0.6Li, 1.4Li, and 2.7Li per mole lithiation reactions were carried out by changing the electrochemical discharge reaction depth. The thermal characteristics of the FeOF cathode were investigated by thermogravimetric mass spectrometric (TG-MS) and differential scanning calorimeter (DSC) systems. No remarkable HF release was detected, even up to 700 °C, which indicated a low toxic risk for the FeOF cathode. Changes in the thermal properties of the FeOF cathode via different conversion reaction depths in the associated electrolyte were studied by changing the cathode/electrolyte ratio in the mixture. LiFeOF was found to exothermically react with the electrolyte at about 210 °C. Similar exothermic reactions were found with charged FeOF cathodes because of the irreversible Li ions. Among the products of the conversion reaction of FeOF, Li2O was found to exothermically react with the electrolyte at about 120 °C, which induced the main thermal risk of the FeOF cathode. It suggests that the oxygen-containing conversion-type cathodes have a higher thermal risk than the oxygen-free ones, but controlling the cathode/electrolyte ratio in cells successfully reduced the thermal risk. Finally, the thermal stability of the FeOF cathode was evaluated in comparison with FeF3 and LiFePO4 cathodes.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Technologies Research · Advanced Battery Materials and Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan
References (31)
Show source-provided references
1. Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion batteries10.1038/35035045 ↗
2. On the origin of the extra electrochemical capacity displayed by MO/Li cells at low potential10.1149/1.1467947 ↗
3. Combined XRD, EXAFS, and Mössbauer studies of the reduction by lithium of α-Fe2O3 with various particle sizes10.1149/1.1622959 ↗
4. Effect of particle size on lithium intercalation into α-Fe2O310.1149/1.1528941 ↗
5. Carbon-metal fluoride nanocomposites. Structure and electrochemistry of FeF3:C10.1149/1.1596162 ↗
6. Carbon-metal fluoride nanocomposites. High-capacity reversible metal fluoride conversion materials as rechargeable positive electrodes for Li batteries10.1149/1.1602454 ↗
7. Facile preparation of porous FeF3 nanospheres as cathode materials for rechargeable lithium-ion batteries10.1016/j.jpowsour.2013.02.026 ↗
8. In situ electrochemical XAFS studies on an iron fluoride high-capacity cathode material for rechargeable lithium batteries10.1021/jp401200u ↗
9. Iron trifluoride synthesized via evaporation method and its application to rechargeable lithium batteries10.1016/j.jpowsour.2012.09.027 ↗
10. Top-down synthesis of open framework fluoride for lithium and sodium batteries10.1021/cm304127c ↗
11. Comprehensive study of the CuF2 conversion reaction mechanism in a lithium ion battery10.1021/jp503902z ↗
12. Dynamic isomers engaged fabrication of copper sulfide rattle-type structures and their optoelectronic properties10.1039/c1ce05588g ↗
13. In situ transmission electron microscopy observation of electrochemical behavior of CoS2 in lithium-ion battery10.1021/am4056084 ↗
14. Ageing mechanisms of conversion-type electrode material studied on iron sulfide thin films10.1016/j.electacta.2013.12.058 ↗
15. Synthesis for Yolk-shell-structured metal sulfide powders with excellent electrochemical performances for lithium-ion batteries10.1002/smll.201301483 ↗
16. An anode material of CrN for lithium-ion batteries10.1149/1.2745087 ↗
17. Vanadium nitride as a novel thin film anode material for rechargeable lithium batteries10.1016/j.electacta.2008.07.057 ↗
18. Nanoflake CoN as a high capacity anode for Li-ion batteries10.1016/j.ssi.2009.05.007 ↗
19. Application of sputtered ruthenium nitride thin films as electrode material for energy-storage devices10.1016/j.scriptamat.2013.01.030 ↗
20. Cathode performance and voltage estimation of metal trihalides10.1016/S0378-7753(96)02580-3 ↗
21. Li-storage via heterogeneous reaction in selected binary metal fluorides and oxides10.1149/1.1801451 ↗
22. Thermal stability of FeF3 cathode for Li-ion batteries10.1016/j.jpowsour.2010.02.076 ↗
23. Thermal characteristics of a FeF3 cathode via conversion reaction in comparison with LiFePO410.1016/j.jpowsour.2011.05.042 ↗
24. Mechanism on exothermic heat of FeF3 cathode in Li-ion batteries10.1016/j.jpowsour.2011.12.016 ↗
25. Ferric oxyfluoride FeOF. Solid solutions of the composition FeOxFx
26. The preparation and properties of rutile-type transition metal oxyfluorides10.1016/0022-4596(70)90032-0 ↗
27. An electron diffraction and crystal chemical investigation of oxygen/fluorine ordering in rutile-type iron oxyfluoride, FeOF10.1006/jssc.2000.8925 ↗
28. Iron oxyfluorides as high capacity cathode materials for lithium batteries10.1149/1.3106132 ↗
29. Synthesis of FeOF using roll-quenching method and the cathode properties for lithium-ion battery10.1016/j.jpowsour.2013.06.053 ↗
30. Lin, C.F., Fan, X., Pearse, A., Liou, S.C., Gregorczyk, K., Leskes, M., Wang, C., Lee, S.B., Rubloff, G.W., and Noked, M. (2017). Highly reversible conversion-type FeOF composite electrode with extended lithium insertion by ALD LiPON protection. Chem. Mater.10.1021/acs.chemmater.7b03058 ↗
31. Thermal characteristics of nongraphitizable carbon negative electrodes with electrolyte in Li-ion batteries10.1016/j.electacta.2009.08.017 ↗