Filling the Charge-Discharge Voltage Gap in Flexible Hybrid Zinc-Based Batteries by Utilizing a Pseudocapacitive Material

© 2021 Wiley-VCH GmbH..

The high charge-discharge voltage gap is one of the main bottlenecks of zinc-air batteries (ZABs) because of the kinetically sluggish oxygen reduction/evolution reactions (ORR/OER) on the oxygen electrode side. Thus, an efficient bifunctional catalyst for ORR and OER is highly desired. Herein, honeycomb-like MnCo2 O4.5 spheres were used as an efficient bifunctional electrocatalyst. It was demonstrated that both ORR and OER catalytic activity are promoted by MnIV -induced oxygen vacancy defects and multiple active sites. Importantly, the multivalent ions present in the material and its defect structure endow stable pseudocapacitance within the inactive region of ORR and OER; as a result, a low charge-discharge voltage gap (0.43 V at 10 mA cm-2 ) was achieved when it was employed in a flexible hybrid Zn-based battery. This mechanism provides unprecedented and valuable insights for the development of next-generation metal-air batteries.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:27

Enthalten in:

Chemistry (Weinheim an der Bergstrasse, Germany) - 27(2021), 18 vom: 26. März, Seite 5796-5802

Sprache:

Englisch

Beteiligte Personen:

Wang, Ling [VerfasserIn]
Wang, Xiao-Tong [VerfasserIn]
Zhong, Jia-Huan [VerfasserIn]
Xiao, Kang [VerfasserIn]
Ouyang, Ting [VerfasserIn]
Liu, Zhao-Qing [VerfasserIn]

Links:

Volltext

Themen:

Journal Article
Metal-air batteries
MnCo2O4.5
Oxygen reduction reaction
Voltage gap
Zinc

Anmerkungen:

Date Revised 29.03.2021

published: Print-Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.1002/chem.202100112

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM320533433