Chemistry Reference
In-Depth Information
6.8.4 Electrochemical Properties of Ionic
Liquids
Although the electroconductivity of a
non-aqueous electrolyte is lower than that of an
aqueous one, as shown in
Table 6.2
,
non-aqueous electrolytes have the advantage of
a wide usable potential window. Accordingly,
ionic
liquids
belong
to
non-aqueous
electrolytes.
Table 6.2
Classification of ionic liquids and
electroconductivity
Electrolyte
Electroconductivity
(at 25°C) (mS
cm
−1
)
Aqueous
system
Acid
35 wt%
H
2
SO
4
/H
2
O
848
Alkaline
30 wt%
KOH/H
2
O
625
Neutral
30 wt%
ZnCl
2
/H
2
O
105
Non-aqueous
system
Organic
1 M
LiPF
6
/EC+EMC
9.6
Inorganic
2 M
LiAlCl
4
/SOCl
2
20.5
Ionic liquid [emim]BF
4
13.6
As shown in
Table 6.3
, imidazolium ionic
liquids generally have relatively good
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