Highly Flexible Stencil Printed Alkaline Ag2O-Zn Battery for Wearable Electronics

Abstract

Flexible power sources such as batteries are essential to realize wearable and conformable electronic devices. The mechanical stability of the electrodes plays an important role in determining the overall flexibility of the battery. Styrene block copolymers-based elastomers have the potential to be used as binder materials in the electrodes for retaining their structural integrity under flexing during regular use. In this work, we demonstrate a stencil-printed flexible primary Ag2O-Zn battery on a nonconductive nylon mesh substrate that uses styrene-butadiene rubber as the anodic binder. A polyacrylic acid-based alkaline polymer gel is used as an electrolyte. The flexible alkaline battery achieved discharge capacities of and without and with a bend radius of 0.8 , respectively, under a constant current load condition of .

Towards Single-Polymer-Based Fully Printed Textile-Based Flexible Ag2O-Zn Battery for Wearable Electronics

“…To this end, a variety of lithium-ion batteries (LIBs) with cathode materials such as lithium cobalt oxide (LCO), lithium manganese oxide (LMO), and lithium titanium oxide, etc., [6] have been widely researched to demonstrate unidirectional deformable batteries due to their high energy density characteristics. In our previous work, we demonstrated a printed unidirectional deformable Ag 2 O-Zn battery using styrene butadiene rubber (SBR) as the anodic binder [7]. In contrast, omnidirectional deformable or "soft" batteries are targeted for wearable health monitoring systems that are directly attached to human skin and possess high flexibility, high safety, and medical compatibility.…”

3R Batteries: Resilient, Repairable, and Recyclable Based on Liquid Gallium Electrode

“…Among the previously reported stretchable batteries, [13][14][15][16][17][18][19][20][21] Ag 2 O-Zn batteries [22,23] have been the focus of several research groups, due to their compatibility with wearable devices their relatively good power and energy density, [24] low flammability when compared to lithium-ion batteries, and low self-discharge rate. [25] A maximum capacity of 5.1 mAh cm −2 has been reported for a thin-film sticker with a printed Ag 2 O-Zn battery over a thin tattoo paper (≈5 μm).…”