HIERARCHICALLY NANOSTRUCTURE ELECTRODE MATERIALS FOR LITHIUM-ION BATTERIES - Electrochemical Nanofabrication: Principles and Applications - page 255

and nanopores, and in its use of gas sensors for detecting carbon
monoxide and hydrogen, as-prepared SnO nano/microstructure

shows an admirable sensitivity and extremely low detecting limit
(5 ppm), as well as good reproducibility and short response/
recovery times. After coating with carbon, both SnO
2

2

-C composite
and Sn-C composite are obtained. Benefiting from the outside
carbon coating layer as well as the

in situ formed matrix of Li O

2

during Li uptake, the obtained SnO -C composite shows a very

high reversible capacity (~700 mAh g

2

after 20 cycles, as shown
in Fig 6.7) and extremely high coulombic efficiency in the initial few
cycles; when compared with said bare SnO

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nanostructure as well

2

-C composite exhibits a much
enhanced cycling behavior, thus gaining its application potential
as a novel anode material in lithium-ion batteries.

as the Sn-C nanocomposite, this SnO

2

Figure 6.6 Flower-like nano/micro hierarchical structures of SnO ((a) and

2

(b)) and SnO -C composites ((c) and (d)). (a) SEM image of as-obtained

2

SnO . Inset shows a close view of a single flower-like structure. (b) TEM

image of “petals” of a SnO

2

flower (all reproduced with permission from
[66], copyright 2009, American Chemical Society).

2