Bottom-Up Design of a Green and Transient Zinc-Ion Battery with Ultralong Lifespan

Autor: Neeru Mittal, Alazne Ojanguren, Dipan Kundu, Erlantz Lizundia, Markus Niederberger
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Small, 19 (7)
ISSN: 1613-6810
1613-6829
DOI: 10.3929/ethz-b-000586219
Popis: Transient batteries are expected to lessen the inherent environmental impact of traditional batteries that rely on toxic and critical raw materials. This work presents the bottom-up design of a fully transient Zn-ion battery (ZIB) made of nontoxic and earth-abundant elements, including a novel hydrogel electrolyte prepared by cross-linking agarose and carboxymethyl cellulose. Facilitated by a high ionic conductivity and a high positive zinc-ion species transference number, the optimized hydrogel electrolyte enables stable cycling of the Zn anode with a lifespan extending over 8500 h for 0.25 mA cm−2 – 0.25 mAh cm−2. On pairing with a biocompatible organic polydopamine-based cathode, the full cell ZIB delivers a capacity of 196 mAh g−1 after 1000 cycles at a current density of 0.5 A g−1 and a capacity of 110 mAh g−1 after 10 000 cycles at a current density of 1 A g−1. A transient ZIB with a biodegradable agarose casing displays an open circuit voltage of 1.123 V and provides a specific capacity of 157 mAh g−1 after 200 cycles at a current density of 50 mA g−1. After completing its service life, the battery can disintegrate under composting conditions.
Small, 19 (7)
ISSN:1613-6810
ISSN:1613-6829
Databáze: OpenAIRE
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