Inkjet-printed flexible planar Zn-MnO2 battery on paper substrate

Sagnik Sarma Choudhury; Nitish Katiyar; Ranamay Saha; Shantanu Bhattacharya

doi:10.1038/s41598-024-51871-5

Inkjet-printed flexible planar Zn-MnO₂ battery on paper substrate

Sci Rep. 2024 Jan 18;14(1):1597. doi: 10.1038/s41598-024-51871-5.

Authors

Sagnik Sarma Choudhury^{1

2}, Nitish Katiyar^{1

2}, Ranamay Saha^{1

2}, Shantanu Bhattacharya^{3

4}

Affiliations

¹ Microsystems Fabrication Laboratory, Indian Institute of Technology, Kanpur, 208016, India.
² Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, 208016, India.
³ Microsystems Fabrication Laboratory, Indian Institute of Technology, Kanpur, 208016, India. [email protected].
⁴ Department of Mechanical Engineering, Indian Institute of Technology, Kanpur, 208016, India. [email protected].

Abstract

Energy storage devices (ESD) which are intended to power electronic devices, used in close contact of human skin, are desirable to be safe and non-toxic. In light of this requirement, Zn based energy storage devices seem to provide a viable pathway as they mostly employ aqueous based electrolytes which are safe and non-toxic in their functioning. Additionally, having a flexible ESD will play a crucial role as it will enable the ESD to conform to the varying shapes and sizes of wearable electronics which they energize. In this work, we have developed an inkjet-printed Zinc ion battery (IPZIB) with planar electrode configuration over bond paper substrate. Zn has been used as the negative electrode, MnO₂ is used as the positive electrode with Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as the active binder. Conducting tracks of reduced graphene oxide (rGO) are used to construct the current collector on the paper substrate. The fabricated IPZIB delivered a high discharge capacity of 300.14 mAh g^-1 at a current density of 200 mA g^-1. The energy density of the IPZIB is observed as 330.15 Wh kg^-1 at a power density of 220 W kg^-1 and retains an energy density of 94.36 Wh kg^-1 at a high power density of 1650 W kg^-1. Finally, we have demonstrated the capability of the IPZIB to power a LED at various bending and folding conditions which indicates its potential to be used in the next generation flexible and wearable electronic devices.