US 11,897,172 B2
Method for fabricating polar plate of flexible plastic graphite composite
Hung-Hsien Ku, Taoyuan (TW); Ning-Yih Hsu, Taoyuan (TW); Han-Jou Lin, Taoyuan (TW); Tai-Feng Hung, Taoyuan (TW); and Qiao-Ya Chen, Taoyuan (TW)
Assigned to Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.O.C., Taoyuan (TW)
Filed by Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.O.C., Taoyuan (TW)
Filed on Sep. 2, 2021, as Appl. No. 17/464,776.
Prior Publication US 2023/0061762 A1, Mar. 2, 2023
Int. Cl. B29C 43/00 (2006.01); B29C 43/24 (2006.01); B29B 9/02 (2006.01); B29C 43/52 (2006.01); B29C 43/46 (2006.01); C08K 3/04 (2006.01); D03D 15/275 (2021.01); D03D 15/25 (2021.01); H01M 8/18 (2006.01); C08K 7/06 (2006.01); B29K 101/10 (2006.01); B29K 101/12 (2006.01)
CPC B29C 43/006 (2013.01) [B29B 9/02 (2013.01); B29C 43/003 (2013.01); B29C 43/24 (2013.01); B29C 43/46 (2013.01); B29C 43/52 (2013.01); C08K 3/04 (2013.01); C08K 7/06 (2013.01); D03D 15/25 (2021.01); D03D 15/275 (2021.01); H01M 8/188 (2013.01); B29K 2101/10 (2013.01); B29K 2101/12 (2013.01); C08K 2201/001 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for fabricating a polar plate of a plastic graphite composite comprising steps of:
(a) ball-milling a conductive powder composition with high carbon (>98%), less than 5 weight percent (wt %) of a flame retardant, and low ash (<1%) for at least 0.5 hours (hr) at a speed of at least 200 rounds per minute (rpm) to form a conductive powder;
(b) mixing the conductive powder, a thermoplastic/thermosetting resin adhesive composition, and a solvent by stirring at least 1 hr to form a mixture;
(c) directly and repeatedly calendering said mixture into a rigid plastic sheet by rolling/squeezing and obtaining a requested thickness of said plastic sheet;
(d) depositing said plastic sheet to process volatilization under a low-temperature vacuum to remove said solvent;
(e) obtaining a composite plastic plate through repeatedly calendering said plastic sheet to a requested thickness with at least one conductive woven iron fabric supporting member stacked into layers consisting of an upper layer of the plastic sheet together with a lower layer of the plastic sheet and a plurality of overlapping layers of the plastic sheet alternating with the conductive woven iron fabric support members to obtain at least one layer of a plastic composite plate having the plastic sheets and the at least one woven iron fabric supporting member; and
(f) graphic-shaping said plastic composite plate with required heat and pressure according to a requested graph to obtain a finished shaped plate.