Recently, we filed a patent application disclosing several new planar battery designs comprising a planar microbattery cell array, as shown below . The array includes a plurality of devices arranged parallel to one another on a substrate. Each device has a positive electrode (dotted areas) and a positive current collector layer (gray areas) that is in contact with at least a portion of a first sidewall of the positive electrode and optionally some or all of the top surface of the positive electrode. Similarly, each device also has a negative electrode (hatched areas) parallel to the positive electrode and a negative current collector layer. There is also an electrolyte in contact with both the positive electrodes and the negative electrodes (not shown). Within the plurality of devices, the positive electrode current collector layer has a first comb structure, and the negative electrode current collector layer has a second comb structure, and the first comb structure and the second comb structure are arranged in an interdigitated configuration. In this presentation we will discuss the design considerations of such planar battery structures, their corresponding pack designs, as well as their low cost fabrication methods involving printing processes.
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