Sheet-like Rechargeable Battery Developed Using New Principle (4)

Mar 2, 2014
Kouji Kariatsumari & Tsunenori Tomioka, Nikkei Technology Online

Continued from Sheet-like Rechargeable Battery Developed Using New Principle (3)

The electrodes of the "battenice" rechargeable battery can also be formed with metal materials such as copper, copper alloy, nickel, aluminum, silver, gold, zinc, tin, etc. And, in addition to sputtering, they can potentially be formed by ion plating, electron beam deposition, vacuum deposition, chemical vapor deposition, electrolytic plating, non-electrolytic plating, etc. Those methods are mentioned in the patent document, but there seems to be a method that enables more efficient volume production.

According to Micronics Japan, it is possible to make the new battery by using roll-to-roll techniques. Moreover, it eliminates the need for aging process, which takes one to two weeks with chemical cells. With such a high production efficiency, it becomes easier to release products with various sizes (and various output voltages by connecting several units of the battery in series and parallel on a roll).

It is unclear whether a plastic substrate can be used or not. But Micronics Japan said, "Though the calcination temperature mentioned in the patent document is 300-400°C, we are making efforts to lower it."

A demonstration of a prototype that has an area of 100 x 100mm and thickness of 11μm. A 1μm-thick battery layer was formed on a 10μm stainless-steel foil.