Microjoining of Flexible Materials using Nanoheaters.
Abstract: With the
continuing integration of electronics and humans, microelectronics need to become
smaller, lighter, and now flexible for wearability. This thesis reports on the
feasibility of using nanoheaters, exothermic alloy structures, for joining flexible
polymer parts for batteries. While flexible displays have come into production there are
few reliable flexible power sources for ... read moreflexible electronics. The main difficulty with
flexible batteries is that it is difficult to find a flexible packaging material that
can either keep the electrolytic solution inside the battery or keep water and other
possible contaminates out of the battery. Rigid metals such as aluminum have been the
norm for this task as they are impervious to nearly anything and use some plastic parts
as seals. Liquid Crystal Polymers have potential to be used in flexible packaging since
they are resistant to electrolytic solutions and are impervious to water and
contaminates. The concern with using LCP to package flexible batteries is sealing the
LCP. With smaller cells and more complex configurations of integrated electronics and
batteries the need for a smaller and more localized joining method such as a localized
heat source is needed. Nanoheaters have been identified to provide a very short and
local heat source that limits the heat affected zone considerably when compared to other
joining methods. In this thesis, methods for using nanoheaters to join and seal flexible
batteries are explored using numerical models with COMSOL and experiments with
commercial and laboratory grade nanoheaters.
Thesis (M.S.)--Tufts University, 2013.
Submitted to the Dept. of Mechanical Engineering.
Advisor: Peter Wong.
Committee: Teiichi Ando, and Michael Zimmerman.
Keyword: Mechanical engineering.read less