Published October 20, 2015 | Version v1
Journal article Metadata-only

Porous spherical LiMnPO4·2Li3V2(PO4)3/C cathode material synthesized via spray-drying route using oxalate complex for lithium-ion batteries

Creators

  • 1. School of Metallurgy and Environment, Central South University, Changsha, Hunan, 410083 (China)
  • 2. School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083 (China)

Description

Highlights: • Porous spherical LiMnPO4·2Li3V2(PO4)3/C was synthesized via spray-drying route. • The lithium ion diffusion path was shortened. • The contact area between electrode and electrolyte was increased. • The mutual doping phenomenon existed between LiMnPO4 and Li3V2(PO4)3. • Electrochemical performance of porous composite was significantly improved. - Abstract: Porous spherical LiMnPO4·2Li3V2(PO4)3/C composite was synthesized innovatively via spray-drying route using oxalate complex. X-ray diffraction patterns and energy dispersive X-ray results revealed that the composite was composed of LiMnPO4 and Li3V2(PO4)3. Scanning electron microscopy results revealed the porous spherical structure, and transmission electron microscopy (TEM) results exhibited that the surface of the microsphere was coated with carbon layer of about 5.1 nm thickness. The mutual doping phenomenon between LiMnPO4 and Li3V2(PO4)3 was also confirmed by high resolution TEM and Fourier transform observation. Porous spherical LiMnPO4·2Li3V2(PO4)3/C delivered an initial capacity of 132.6 mAh g−1 at 0.1 C and noticeably enhanced high rate capacities at 1, 3 and 10 C. Compared with solid spherical LiMnPO4·2Li3V2(PO4)3/C, cycle performance, high-rate performance and lithium ion intercalation performance of porous spherical LiMnPO4·2Li3V2(PO4)3/C were all significantly improved.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.electacta.2015.08.109

Additional details

Identifiers

DOI
10.1016/j.electacta.2015.08.109;
PII
S0013-4686(15)30359-5;

Publishing Information

Journal Title
Electrochimica Acta
Journal Volume
180
Journal Page Range
p. 507-513
ISSN
0013-4686
CODEN
ELCAAV

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
48099391
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
DOPED MATERIALS; FOURIER TRANSFORMATION; LITHIUM ION BATTERIES; OXALATES; PERFORMANCE; POROUS MATERIALS; SCANNING ELECTRON MICROSCOPY; SPRAY DRYING; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
Descriptors DEC
CARBOXYLIC ACID SALTS; COHERENT SCATTERING; DIFFRACTION; DRYING; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; ELECTRON MICROSCOPY; ENERGY STORAGE SYSTEMS; ENERGY SYSTEMS; INTEGRAL TRANSFORMATIONS; MATERIALS; MICROSCOPY; SCATTERING; TRANSFORMATIONS

Optional Information

Copyright
Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.