title: An Approach To Fabricate PDMS Encapsulated All-Solid-State Advanced Asymmetric Supercapacitor Device with Vertically Aligned Hierarchical Zn-Fe-Co Ternary Oxide Nanowire and Nitrogen Doped Graphene Nanosheet for High Power Device Applications.
abstract: We highlight the design and fabrication of a polydimethylsiloxane (PDMS) encapsulated advanced all-solid-state asymmetric supercapacitor (ASC) device consisting of hierarchical mesoporous zinc-iron-cobalt ternary oxide (ZICO) nanowire coated nickel (Ni) foam (ZICO@Ni foam) as a promising positive electrode and nitrogen doped graphene coated Ni foam (N-G@Ni foam) as negative electrode in the presence of PVA-KOH gel electrolyte. Owing to outstanding electrochemical behavior and ultrahigh specific capacitance of ZICO (≈ 2587.4 F/g at 1 A/g) and N-G (550 F/g at 1 A/g) along with their mutual synergistic outputs, the assembled all-solid-state ASC device exhibits an outstanding energy density of ≈40.5 Wh/kg accompanied by a remarkable long-term cycle stability with ≈95% specific capacitance retention even after 5000 charge-discharge cycles. The exclusive hierarchical ZICO nanowires were synthesized by a facile two-step process comprising of a hydrothermal protocol followed by an annealing treatment on a quartz substrate. While Zn2+gives the stability of the oxide system, Fe and Co ions provide better electronic conductivity and capacitive response under vigorous cyclic condition. The extraordinary performance of as-fabricated ASC device resembles its suitability for the construction of advanced energy storage devices in modern electronic industries.
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Anirban
authors.initials: A
authors.lastname: Maitra
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Amit Kumar
authors.initials: AK
authors.lastname: Das
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Ranadip
authors.initials: R
authors.lastname: Bera
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Sumanta Kumar
authors.initials: SK
authors.lastname: Karan
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Sarbaranjan
authors.initials: S
authors.lastname: Paria
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Suman Kumar
authors.initials: SK
authors.lastname: Si
authors.affiliation: Materials Science Centre, Indian Institute of Technology Kharagpur , Kharagpur 721302, West Bengal, India.
authors.forename: Bhanu Bhusan
authors.identifier: http://orcid.org/0000-0002-1277-0091
authors.initials: BB
authors.lastname: Khatua
keywords: N-G; ZICO; asymmetric supercapacitor; energy density; polydimethylsiloxane