La-doped LiMnPO4/C cathode material for Lithium-ion battery. (15th May 2023)

• Record Type: Journal Article
• Authors: Nag, Sourav; Roy, Shyamal
• Is Part Of: Chemical engineering science. Volume 272(2023)
• Publication Date: 2023-05-15
• Subjects: Lithium-ion battery -- Cathode -- Capacity -- Olivine -- Energy density -- Power density; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2023.118600
• Languages: English
• ISSNs: 0009-2509

Abstract

Graphical abstract: In-situ carbon coated 1% La 3+ ion doped LiMnPO4 prepared by low temperature solvothermal method can improve the electrochemical stability of Li-ion cell at higher C-rate. Highlights: La doped LiMnPO4 nanostructure having spherical morphology with in-situ carbon coating synthesized by low temperature solvothermal method. Orthorhombic crystal structure is maintained up to 1% La 3+ ion doping into manganese sites. 1% La 3+ ion doped LiMnPO4 improves the electrochemical stability of Li-ion cell at higher C-rate. Abstract: LiMnPO4 and LiMn1-x Lax PO4 (0.01 ≤ x ≤ 0.1) nanostructures with in-situ carbon coating are synthesized by low temperature solvothermal method using Glycerol: Water (2:1) ratio as solvent. Powder X-ray diffraction (XRD) studies confirmed the orthorhombic crystal structure of LiMnPO4 and LiMn0.99 La0.01 PO4 . X-ray diffraction shows that up to 1% La 3+ ion doping into manganese sites does not affect the crystal structure of LiMnPO4 . Field emission scanning electron microscopy (FESEM) of LiMnPO4 and LiMn0.99 La0.01 PO4 depicts the formation of nanosized particles with spherical morphology. Electrochemical properties of LiMnPO4 and LiMn0.99 La0.01 PO4 are investigated by galvanostatic charge discharge tests. The present studies show that 1% La 3+ ion doped LiMnPO4 could be a promising cathode material that can improve the performance of Lithium-ion cell by increasing the electrochemical stability at higher C-rate.