Abstract
The effect of a protective coating of fused lithium borate, Li3BO3, on the physicochemical and electrochemical characteristics of LiCoO2 has been studied. A cathode material produced by the SCS method using binary organic fuel, glycine and citric acid. The influence of the experiment conditions on the morphology, crystal structure and specific surface of lithium cobaltite was studied. Electrochemical testing of LiCoO2∙nLi3BO3 samples, n = 5 and 7 mass %, has been performed in the cathode Li|Li+-electrolyte|LiCoO2∙nLi3BO3 half-cell using 1M LiPF6 in EC/DMC mixture (1:1) as electrolyte in the 2.7-4.3 V range at normalized discharge current С/10, С/5, С/2. The maximal initial discharge capacity of 185 mAh/g was detected for the samples with 5 mass % Li3BO3. The coulomb efficiency of optimal materials in the 40th cycle was 99.1%.
Highlights
Lithium cobaltite LiCoO2 (LCO) is used as a cathode material since 1990, and in spite of the appearance of such promising cathode materials as LiNi1/3Mn1/3Co1/3O2 (NMC), LiNi0.8Co0.15Al0.05O2 (NCA), LiMn2O4 (LMO) etc. it is still employed as a component of lithium-ion batteries (LIB) with low discharge rates in portable gadgets [1]
We report structural, morphological, dimensional and electrochemical characteristics of LCO powders produced in solution combustion synthesis (SCS) reactions with glycine and citric acid with subsequent coating with fused lithium borate Li3BO3
The LCO powders obtained after combustion possessed high dispersion and revealed chemically non-equilibrium state due to incomplete crystal lattice formation processes
Summary
Lithium cobaltite LiCoO2 (LCO) is used as a cathode material since 1990, and in spite of the appearance of such promising cathode materials as LiNi1/3Mn1/3Co1/3O2 (NMC), LiNi0.8Co0.15Al0.05O2 (NCA), LiMn2O4 (LMO) etc. it is still employed as a component of lithium-ion batteries (LIB) with low discharge rates in portable gadgets [1]. It is reasonable to expect that the described above effects detected under conditions of laboratory experiments will be multiply strengthened if the mass of the material is increased. This problem can be solved by using of less energetic fuel for controlled reduction of SCS rate, for example, sucrose, ammonium acetate starch, citric acid and oxalic acid [24,25,26,27,28]. We report structural, morphological, dimensional and electrochemical characteristics of LCO powders produced in SCS reactions with glycine and citric acid with subsequent coating with fused lithium borate Li3BO3
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
