Lithium storage capability of CuGeO{sub 3} nanorods

Journal Article · Sun Jul 15 04:00:00 EDT 2012 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.03.034· OSTI ID:22215141

Feng, JinKui; Lai, Man On ^[1]; Lu, Li ^[1]

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1. Materials Science Group, Department of Mechanical Engineering, National University of Singapore, Singapore 17576 (Singapore)

Highlights: ► We synthesized nanosized CuGeO{sub 3} by a facial hydrothermal method for Li battery. ► A high capacity of 690 mAh g{sup −1} at 50 cycles is achieved. ► The capacity is remarkably higher than that of the GeO{sub 2} electrode. ► The nanosized CuGeO{sub 3} also shows good cyclability. -- Abstract: Copper metagermanate (CuGeO{sub 3}) nanorods were synthesized through a low temperature hydrothermal method at 180 °C. The as-synthesized CuGeO{sub 3} nanorods show a well crystallined nanostructure with diameters in the range from 40 to 70 nm, and a length from 250 to 350 nm. Electrochemical measurements demonstrate that the CuGeO{sub 3} nanorods exhibit a first charge capacity of 924 mAh g{sup −1} and 690 mAh g{sup −1} after 50 cycles, which is remarkably improved than the pure nanosize GeO{sub 2} electrode. This investigation indicates that CuGeO{sub 3} nanorods could be utilized as a high capacity anode material in lithium-ion batteries by reducing particle size and metal oxide addition. The lithium storage mechanisms for the improved capacity retention were also studied.

• OSTI ID: 22215141
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 7 Vol. 47; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
COPPER
COPPER COMPOUNDS
ELECTRIC BATTERIES
ELECTRON MICROSCOPY
GERMANATES
GERMANIUM OXIDES
HYDROTHERMAL SYNTHESIS
LITHIUM
NANOSTRUCTURES
PARTICLE SIZE
X-RAY DIFFRACTION