Topological Insulator Bi2Te3 Anode for Aqueous Aluminum-Ion Batteries: Unveiling the Role of Hydronium Ions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0198741" target="_blank" >RIV/00216305:26620/26:0198741 - isvavai.cz</a>

Výsledek na webu

<a href="https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.202507255" target="_blank" >https://advanced.onlinelibrary.wiley.com/doi/10.1002/advs.202507255</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/advs.202507255" target="_blank" >10.1002/advs.202507255</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Topological Insulator Bi2Te3 Anode for Aqueous Aluminum-Ion Batteries: Unveiling the Role of Hydronium Ions

Popis výsledku v původním jazyce

The primary scientific challenge in advancing aqueous aluminum-ion batteries (AAIBs) is achieving reversible plating/stripping of the Al metal anode, limited by its low deposition potential (-1.667 V vs SHE) and surface passivation in the aqueous electrolyte. To address this issue, polypyrrole (PPy) decorated topological quantum insulator (Bi2Te3@PPy) is introduced as a novel anode in AAIBs. Benefiting from the interconnected PPy network and the gap-free metallic surface state of Bi2Te3, the Bi2Te3@PPy anode enables a remarkable discharge capacity of 438 mAh g-1 at a current rate of 0.5 A g-1. It also maintains a strong discharging plateau even at a higher current rate of 10 A g-1, outperforming most electrode materials reported so far for AAIBs. The role of the topological surface states of Bi2Te3 in enhancing the ion migration rate is validated by comparing its performance across various morphologies. Ex situ studies and computational analysis reveal that in aqueous systems, Al3+ is not the sole species responsible for charge storage. Instead, hydronium ions (H3O+) significantly contribute to storing the charges through intercalation into the crystal lattice. Overall, this study pioneers a new approach for developing advanced Al metal-free AAIBs and provides deeper insights into the charge storage mechanisms in aqueous electrolytes.

Název v anglickém jazyce

Topological Insulator Bi2Te3 Anode for Aqueous Aluminum-Ion Batteries: Unveiling the Role of Hydronium Ions

Popis výsledku anglicky

The primary scientific challenge in advancing aqueous aluminum-ion batteries (AAIBs) is achieving reversible plating/stripping of the Al metal anode, limited by its low deposition potential (-1.667 V vs SHE) and surface passivation in the aqueous electrolyte. To address this issue, polypyrrole (PPy) decorated topological quantum insulator (Bi2Te3@PPy) is introduced as a novel anode in AAIBs. Benefiting from the interconnected PPy network and the gap-free metallic surface state of Bi2Te3, the Bi2Te3@PPy anode enables a remarkable discharge capacity of 438 mAh g-1 at a current rate of 0.5 A g-1. It also maintains a strong discharging plateau even at a higher current rate of 10 A g-1, outperforming most electrode materials reported so far for AAIBs. The role of the topological surface states of Bi2Te3 in enhancing the ion migration rate is validated by comparing its performance across various morphologies. Ex situ studies and computational analysis reveal that in aqueous systems, Al3+ is not the sole species responsible for charge storage. Instead, hydronium ions (H3O+) significantly contribute to storing the charges through intercalation into the crystal lattice. Overall, this study pioneers a new approach for developing advanced Al metal-free AAIBs and provides deeper insights into the charge storage mechanisms in aqueous electrolytes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21000 - Nano-technology

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Science

ISSN

—

e-ISSN

2198-3844

Svazek periodika

12

Číslo periodika v rámci svazku

37

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

001522862200001

EID výsledku v databázi Scopus

2-s2.0-105009851077