A general solution-chemistry route to the synthesis LiMPO{sub 4} (M=Mn, Fe, and Co) nanocrystals with [010] orientation for lithium ion batteries

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Journal of Solid State Chemistry

OSTI ID:21580056

Jing, Su ^[1]; Bingqing, Wei; Jiepeng, Rong ^[2]; Wenyan, Yin; Zhixia, Ye; Xianqing, Tian; Ling, Ren ^[1]; Changwen, Hu ^[1]

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1. Key Laboratory of Cluster Science, Ministry of Education of China, Department of Chemistry, Beijing Institute of Technology, Beijing 100081 (China)
2. Department of Mechanical Engineering, University of Delaware, Newark, DE 19716 (United States)

A general and efficient solvothermal strategy has been developed for the preparation of lithium transition metal phosphate microstructures (LiMnPO{sub 4}, LiFePO{sub 4}, and LiCoPO{sub 4}), employing ethanol as the solvent, LiI as the Li source, metal salts as the M sources, H{sub 3}PO{sub 4} as the phosphorus source, and poly(vinyl pyrrolidone) (PVP) as the carbon source and template. This route features low cost, environmental benign, and one-step process for the cathode material production of Li-ion batteries without any complicated experimental setups and sophisticated operations. The as-synthesized LiMPO{sub 4} microstructures exhibit unique, well-shaped and favorable structures, which are self-assembled from microplates or microrods. The b axis is the preferred crystal growth orientation of the products, resulting in a shorter lithium ion diffusion path. The LiFePO{sub 4} microstructures show an excellent cycling stability without capacity fading up to 50 cycles when they are used as a cathode material in lithium-ion batteries. - Graphical abstract: A general and efficient solvothermal strategy has been developed for the preparation of lithium transition metal phosphate microstructures under solvothermal conditions in the presence of PVP. Highlights: > A general and efficient solvothermal strategy has been developed for the preparation of LiMPO{sub 4} microstructures. > This route features low cost, environmental benign, and one-step process. > The LiMPO{sub 4} microstructures exhibit unique, well-shaped, and favorable structures. > The LiFePO{sub 4} microstructures show an excellent cycling stability up to 50 cycles as a cathode material of lithium-ion batteries.

• OSTI ID: 21580056
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 11; Other Information: DOI: 10.1016/j.jssc.2011.08.042; PII: S0022-4596(11)00482-8; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON SOURCES
CATHODES
CRYSTAL GROWTH
ELECTRIC BATTERIES
LITHIUM
LITHIUM IONS
MICROSTRUCTURE
NANOSTRUCTURES
PHOSPHATES
PHOSPHORIC ACID
PHOSPHORUS
PVP
STABILITY
SYNTHESIS
TRANSITION ELEMENTS
ALKALI METALS
AMIDES
AZOLES
BLOOD SUBSTITUTES
CHARGED PARTICLES
DRUGS
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
ENERGY STORAGE SYSTEMS
ENERGY SYSTEMS
HEMATOLOGIC AGENTS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INORGANIC COMPOUNDS
IONS
LACTAMS
METALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
POLYMERS
POLYVINYLS
PYRROLES
PYRROLIDONES