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指導教授：王聖璋 博士
學生：黃伯嘉
2016/7/15
結果與討論
XRD
The reaction of resorcinol and formaldehyde forms a cross-linked 3-dimensional
net-like gel , which possesses an interconnected bead structure. The homogenous
distribution of SnS in such 3-dimensional net-like amorphous carbon can be
obtained via carbonization of resorcinol–formaldehyde gel.
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結果與討論
Fig.2a.The
size
of
as-prepared
SnS
nanoparticles is super fine, less than 10 nm.
The selected area diffraction pattern of SnS
nanoparticles in the inset proves the existence
of orthorhombic SnS phase and the diffraction
ring symbolizes (120) plane of SnS crystal.
Fig. 2b gives a HRTEM image of SnS/carbon
composite. It can be seen clearly that the
composite presents net-like nanostructure with
SnS nanoparticles embedded in carbon.
結果與討論
循環伏安法－電容測試
The outline of SnS/carbon composite electrode presents more closely to rectangle,
indicating that SnS/carbon composite has better capacitive response and is more
suitable for working as an electrode for supercapacitor.
結果與討論
充電－放電
測試
Fig. 4. The potential–t relationships on charge–discharge profiles are all approximately linear,
which indicates that both electrodes have regular capacitive behaviors and good cycling
stabilities.
結果與討論
The SC of SnS/carbon composite reaches 36.16 F/g, while pristine SnS delivers
less SC of 19.25 F/g.
Such results are superior to the performances of nano SnS prepared by Jayalakshmi
M. et al. [8]. It is believed that net-like nanostructure of SnS/carbon composite could
provide larger contact areas between electrode and electrolyte, which facilitates the
redox reactions and helps to obtain more pseudo-capacitances
The electronic conductivities of SnS and SnS/Carbon composite are 5.66×10−3 S/m
and 231.9 S/m respectively, determined by four-point probe method
Surface areas of SnS and carbon samples are 68.36 and 477.19 m2/g respectively. We
believe smaller surface area of SnS is another key factor which could account for its
lower electrochemical
結論
1.利用resorcinol–formaldehyde混和SnS粒子
在650°C可以得到網格狀且散佈平均SnS/corbon。
2.透過循環伏安法測試得知SnS/corbon可以得
到比較大的比電容。
3.在充電-放電的過程中，網格狀的SnS/corbon
奈米材料可以得到比較好的導電性。
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Thanks for your attention