Preparation of starch-based porous carbon electrode and biopolymer electrolyte for all solid-state electric double layer capacitor

Palanisamy Rupa Kasturi; Harivignesh Ramasamy; Danielle Meyrick; Yun Sung Lee; Ramakrishnan Kalai Selvan

doi:10.1016/j.jcis.2019.06.081

Preparation of starch-based porous carbon electrode and biopolymer electrolyte for all solid-state electric double layer capacitor

J Colloid Interface Sci. 2019 Oct 15:554:142-156. doi: 10.1016/j.jcis.2019.06.081. Epub 2019 Jun 25.

Authors

Palanisamy Rupa Kasturi¹, Harivignesh Ramasamy², Danielle Meyrick³, Yun Sung Lee², Ramakrishnan Kalai Selvan⁴

Affiliations

¹ Energy Storage and Conversion Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641046, Tamil Nadu, India.
² Faculty of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, South Korea.
³ Departments of Nuclear Medicine, The University of Western Australia, School of Medicine, Perth, Australia.
⁴ Energy Storage and Conversion Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore 641046, Tamil Nadu, India. Electronic address: selvankram@buc.edu.in.

PMID: 31295686
DOI: 10.1016/j.jcis.2019.06.081

Abstract

An ever-increasing demand for energy coupled with environmental pollution associated with conventional energy production continues to drive the search for alternative renewable energy storage solutions. In this regard, a high surface area (1841 m² g^-1), hierarchically porous (∼1.18 cm³ g^-1) and self-inherited nitrogen (2.1 at.wt%) based activated carbon are obtained from Artocarpus heterophyllus seed derived starch as a result of ZnCl₂ chemical activation. A flexible, conductive, thermally stable and bio-degradable biopolymer electrolyte film is prepared from Manihot esculenta starch powder. These eco-friendly hierarchically porous architectured carbon electrode and flexible biopolymer electrolytes are employed as significant components in a coin cell-based all-solid-state supercapacitor. The resulting device delivers a high specific capacitance of 240 Fg^-1 at 0.5 mA with 97% coulombic efficiency over 2000 cycles. In addition, the device provided excellent specific energy (17 Wh kg^-1) and specific power (3823 W kg^-1). Interestingly, the starch derived biopolymer electrolyte film, when buried under soil, shows a favourable natural rate of degradation. Therefore, this fabricated electric double layer capacitor can be used as a promising device with little to no potential environmental harm.

Keywords: Activated porous carbon; Artocarpus heterophyllus seed starch; Biopolymer electrolyte; Supercapacitor.