Electronic Supplementary Information
Supporting Information
Synthesis of ZnSnO3 Mesocrystals from Regular
Cube-like to Orthorhombic Sheet-like Structures and
Their Comparative Electrochemical Properties in Li-ion
Batteries
Yuejiao Chen, Baihua Qu, Lin Mei, Danni Lei, Libao Chen, Qiuhong Li*,
and Taihong Wang*
Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education,
State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University,
Changsha, P. R. China.
E-mail: [email protected], [email protected]
Characterisation
Thermogravimetric and differential thermal analyses (TG/DTA) were carried out
using a Shimadzu DT-40 thermal analyzer at the heating rate of 5 °C/min in air. The
microstructure and morphology of the composites were analyzed by a Hitachi S4800
scanning electron microscope (SEM).
Electronic Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2012
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Fig. S1 Thermogravimetric and differential thermal (TG/DTA) curves of (a) cubic
precursors and (b) sheet-like precursors in air with a heating rate of 5 °C/min. The two
kinds of precursors show similar TG/DTA curves. The first weight loss before 150 °C
is mainly due to the elimination of absorbed water in the samples. After the
temperature, the rate of weight loss became fast and an endothermic peaks occurred at
about 200~250 °C due to the thermal decomposition of ZnSn(OH)6 to ZnSnO3. The
results agree with the reported values.1,2 An small exothermic peak was observed on
the DTA curves at the temperature of about 650~700 °C, respectively. But no weight
loss happened above the temperature. It is due to the phase transition from ZnSnO3 to
Electronic Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2012
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Zn2SnO4 and SnO2. The thermal analysis curves indicate that ZnSnO3 can be formed
at about 500 °C.
Fig. S2 High-magnification SEM images of cubic ZnSnO3 (a) and sheet-like ZnSnO3
(b). At the same magnification, the cubic crystallites show an edge size of 50-100 nm
while the nanosheets possess the thickness of less than 50 nm, with their surface being
not smooth but composed of smaller size of flakes (marked with red circle).
(1) Ramamurthy, P.; Secco, E. A. C. J. Chem. 1971, 49, 2813.
(2) G. Wrobel, M. Piech, S. Dardona, Y. Ding and P. X. Gao, Cryst. Growth Des, 2009,
9, 4456.
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