New strategy to the controllable synthesis of CuInS{sub 2} hollow nanospheres and their applications in lithium ion batteries

Journal Article · Wed Feb 15 04:00:00 EST 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.11.042· OSTI ID:21612890

Hui, Zeng; Zeheng, Yang; Qiang, Wang ^[1]

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1. School of Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering, Hefei, Anhui 230009 (China)

A new strategy has been presented to the controllable synthesis of CuInS{sub 2} hollow nanospheres based on the Cu{sub 2}O solid nanospheres as the precursor in the absence of any surfactant. Specifically, the CuInS{sub 2} hollow nanospheres result from hydrothermal transformation of the intermediate Cu{sub 7}S{sub 4} hollow nanospheres derived from Cu{sub 2}O solid nanosphere precursor by the Kirkendall effect in the conversion process. The CuInS{sub 2} hollow nanospheres with diameters of about 250 nm are assembly of nanoparticles with an average size of 20-30 nm. The composition, structure, and morphology of the Cu{sub 2}O precursor, the Cu{sub 7}S{sub 4} intermediate, and final CuInS{sub 2} product have been, respectively, characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) with selected area electron diffraction (SAED). Different from investigation of photovoltaic properties, in this work, the as-prepared CuInS{sub 2} hollow nanospheres have been explored as anode materials for rechargeable lithium ion batteries. They deliver a large initial discharge capacity of 1144 mAh g{sup -1} and exhibit good cycle performance with a discharge capacity of 265 mAh g{sup -1} after 20 cycles, which are superior to those of CuInS{sub 2} nanoparticles. The suitable surface area and relatively stable structure of the CuInS{sub 2} hollow nanospheres play an important role in their enhanced electrochemical performance as anode materials. - Graphical abstract: CuInS{sub 2} hollow nanospheres was successfully prepared from Cu{sub 2}O solid nanospheres in the absence of any surfactant, which can deliver a large initial discharge capacity of 1144 mAh g{sup -1} and exhibit good cycle performance. Highlights: Black-Right-Pointing-Pointer CuInS{sub 2} hollow nanospheres were synthesized hydrothermally from Cu{sub 2}O nanospheres. Black-Right-Pointing-Pointer The CuInS{sub 2} hollow nanospheres present high discharge capacities as anode materials. Black-Right-Pointing-Pointer Better cycling performance can be attributed to its hollow structure.

• OSTI ID: 21612890
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 186; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANODES
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
COPPER SULFIDES
DIFFRACTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
EMISSION
ENERGY STORAGE SYSTEMS
ENERGY SYSTEMS
FIELD EMISSION
HYDROTHERMAL SYNTHESIS
INDIUM COMPOUNDS
INDIUM SULFIDES
IONS
KIRKENDALL EFFECT
LITHIUM IONS
MATERIALS
MICROSCOPY
NANOSTRUCTURES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHOTOELECTRIC EFFECT
PHOTOVOLTAIC EFFECT
SCANNING ELECTRON MICROSCOPY
SCATTERING
SOLIDS
SULFIDES
SULFUR COMPOUNDS
SURFACE AREA
SURFACE PROPERTIES
SURFACTANTS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION