Abstract
ZnO nanocrystals were synthesized via a thermal decomposition method. X-ray diffraction, transmission electron microscopy, and photoluminescence were used to investigate the composition and nanostructure of the material. Compared with commercial ZnO nanoparticles, ZnO nanocrystals showed higher lithium storage capacity and better cycling characteristics and exhibited a reversible discharge capacity of 500 mAh g−1after 100 cycles at 200 mA g−1.
Highlights
Transition metal oxides have gained more and more interest as electrode materials in lithium-ion batteries in the last decades because of their higher theoretical capacity and safety compared with the conventional carbon materials [1,2,3,4]
ZnO nanocrystals with different morphologies have some special properties of physics, so intense interests have been devoted to the synthesis of ZnO with various morphologies such as nanowires [10], nanobelts [11], nanorods [12], and nanosheets [13]
ZnO nanocrystals have been prepared by a thermal decomposition method and their electrochemical performances as lithium anode materials are investigated
Summary
Transition metal oxides have gained more and more interest as electrode materials in lithium-ion batteries in the last decades because of their higher theoretical capacity and safety compared with the conventional carbon materials [1,2,3,4]. As an anode material of lithium-ion batteries, ZnO has a theoretical capacity of 978 mAh g−1 [14]. Some efforts have been made to improve its cycling performance including synthesis of nanostructures [15,16,17], doping and forming composite with metal [18, 19], metal oxide [20,21,22], carbon [23, 24], and graphene [25, 26]. Dandelion-like ZnO nanorod arrays showed higher lithium storage capacity and better cycling characteristics compared to powder-form ZnO [27]. ZnO nanocrystals have been prepared by a thermal decomposition method and their electrochemical performances as lithium anode materials are investigated
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