○For CMC as a binder in the electric double layer capacitor
I was in charge of CMC・・・Cellulose acetate L-50
Battery-powered・・・Al|Cellulose acetate L-50,VGCF,BM-400B 40wt%|SUS
This will create a slurry by using a cellulose acetate L-50, was applied to Al which had been cut to the slurry in advance,to prepare an electric double layer capacitor it as an electrode.
・Coating amount of the L-50 was 0.006g. Although water was added it was not soluble in L-50.
Then was added a CNT also not melt, but not melted even further added water 10 drops.
Finally was added SBR, which was also not melt.
When applied to the Al was also a sense of putting rather than to a null.
●result
・In measuring the CV of the L-50, have been set conditions.
[Conditions] ... Sweep rate:100[mv/s]
Sweep range:0~1[V]
5Cycle
・Measurement of the CV value of the L-50 in this condition,
Anode side ... the first cycle: 1000 [μF] Cathode side ... 1-5 cycle: 700 [μF]
second cycle: 800 [μF]
third cycle: 785 [μF]
fourth cycle: 770 [μF]
fifth cycle:755[μF]
It has become. Apparently a state during the measurement, anomalies such as air bubbles were observed.
Then, I tried to CV value of Titanium.
As the purpose, usually are used in lithium titanate baked. However, since the lithium titanate is the active material, I have to try to electrochemical synthesis. In order to investigate the electrochemical properties of the negative electrode of titanium was measured current CV value.
Battery-powered・・・Ti|1moL/L LiPF6,EC:DME(1:1v/v%)|Li vs Li
・In measuring the CV of titanium, have been set conditions.
[Conditions] ... Sweep rate:100[mv/s]
Sweep range:0~5[V]
• This was subjected to measurement of CV values in conditions, became the graph, such as the following.
Starting point of the cycle, starting from the open circuit voltage +3.1[V].
Value of slow current to +5[V] is going up, the maximum value of the final of the anode-side current became 0.48[A].
After inverted to the cathode side, the curve approaches the +1.3[V] slope became greater.
From there to +0.8[V], but the value of the current was increased again, and we are also down from there, the last was gone up outside the measurement range. The maximum current of the cathode side was -1.4[A].
Although up to +0.48[V] was outside the measurement range of 0[V], and rises from there suddenly and reaches a point on the anode side of +0.75[V] it becomes impossible to measure a while sharply and comes to a point of +1.0[V] descent, when lowered to +0.1[A], it was the goal back to the point of the drawing to +3.1[V] a gentle curve.
And results can be determined from the value of the current can be used as a negative electrode Titanium is unstable, it is believed that anxiety remains in use as a battery.