Preparation of the new target cell

1
Preparation of the new target cell

• 20 Dec. 2007
• H. Kanda

2
Idea sketch of new cells
Type 1
Type 2
Type 3
thin cap on the both end of the cylindrical cell
thick cylindrical caps on both sides of the cell
films on the flanges
3
How to form the cap-shaped films?

1. Thermal polymerization of Polyimide varnish
   Ube-Industory U-Varnish-S
2. E9 GPa, smax 500 MPa for 25 um film
3. High glass-transition temperature (gt500 degC) -gt
   difficulty of the heat press
4. Thickness controllable
5. Heat press of aramid film Toray Mictron
6. E10GPa, smax 480 MPa for 12 um film
7. lower glass-transition temperature (270 degC)
   than polyimide -gt possibility of the heat press
8. Thickness lt 20 um
9. Heat press of PET for cylindrical part and cap
   for type-3 cell?

4
Polimerization of U-Varnish

• High temperature oven (Tgt500 degC) is needed...
  not available in Science Faculty of Tohoku Univ.
  Now I search for it in other facilities and
  consult to Advantec Corp.
• Evaporation of salt (NaCl) on the metal mold may
  be needed. SSPNS group in Department of Physics
  own the evaporator.
• Solvent of the varnish (n-Methyl-2-pyrrolidone)
  is flammable... is it possible to handle it in
  the higher temperature than the combustion
  point??
• Now I consult to the Dr. Ishikawa of JAXA and
  Prof. Ishikawa of Department of polymer science
  and engineering, Yamagata Univ.

5
Heat press of aramid film

• Toray changed their attitude completely as
  compared to 5 years ago and they willingly supply
  some sample films for their aramid film Mictron.
• The surface of Mictron can be treated with the
  corona-discharge and it increases the
  adhesiveness.
• Matsumoto Co. Ltd., the company with heat press
  technology of PET, is now trying to test the heat
  press of the aramid films.
• For the formation of the PET cylinder, Matsumoto
  Co. Ltd. is one choice of the company to order it.

6
Measurement of the shape of the cell

• Because the shape and structure of the cell will
  be completely changed, its shape should be
  carefully measured.
• Not only for the measurement of the shape of our
  cell, a general purpose shape measuring machine
  should be useful for our experiments.
• 1-dimensional probe 2-dimensional movement
• rental sensors available (lt100,000 Yen/month)
• automatic motion control is needed (500,000 Yen)
• 2-dimensional probe linear movement
• no rental sensor available
• expensive (gt1,400,000 Yen)
• simple motion -gt manual motion is sufficient
  (lt100,000 Yen)

7
Multi-purpose form measuring machine

• By exchanging the 1-dimensional sensor, the
  optimum dynamic range and precision are obtained.
• Changeableness to the possessing sensor (Keyence
  LC-2440) is important.
• Coms Corp. sells this kind of order-made
  measuring machine (right figures).
• Can a hand-made measuring machine be developed
  with reference to this machine? For our purpose,
  sensor should be moved by an automatic motion
  controller.