Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/34772

Controllable synthesis of spinel nano-ZnMn(2)O(4) via a single source precursor route and its high capacity retention as anode material for lithium ion batteries

Authors Deng, Yuanfu HKUST affiliated (currently or previously).
Tang, Shidi
Zhang, Qiumei HKUST affiliated (currently or previously).
Shi, Zhicong
Zhang, Leiting HKUST affiliated (currently or previously)
Zhan, Shuzhong
Chen, Guohua View this author's profile
Issue Date 2011
Source Journal of materials chemistry , v. 21, (32), 2011, p. 11987-11995
Summary Agglomerated pure spinel ZnMn(2)O(4) nanoparticles with flake-shaped structure have been synthesized via calcination of an agglomerated Zn-Mn citrate complex precursor, which was prepared with high yield by a convenient, environmentally benign and low temperature route. The composition, morphology and thermal decomposition of the Zn-Mn citrate complex were studied by C&H elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR), energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The resulting ZnMn(2)O(4) nanoparticles obtained from the precursor calcination at 700 degrees C were systematically characterized by XRD, FTIR, N(2) Adsorption/Desorption, SEM, TEM, HRTEM and selected area electron diffraction (SAED). The results show that the ZnMn(2)O(4) material was agglomerated to form a porous texture in pure phase. The electrochemical properties of the agglomerated ZnMn(2)O(4) material were investigated to determine its reversible capacity, rate and cycling performance as the anode material for lithium ion batteries (LIBs). This ZnMn(2)O(4) material exhibited promising capacity retention of over 200 cycles at varying discharge rates. The electrode also exhibited attractive rate capabilities yielding capacity of 330 mAh g(-1) after more than 35 cycles at 600 mA g(-1). The ameliorated electrochemical performance can be ascribed to the high crystallinity and porous texture of the ZnMn(2)O(4) material which provided short diffusion paths for lithium ions. Ex situ XRD analysis of the electrodes after discharging and charging to the selected voltage was conducted and the possible lithium insertion mechanisms are discussed. This study suggests that the ZnMn(2)O(4) material synthesized via the single source precursor route is a promising anode material for LIBs.
ISSN 0959-9428
Language English
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