Vacancy‐Engineered Vanadium Cathode for Fast‐Charging Aqueous Zinc Batteries of Ultra‐Long Cycle Life
Bag, Saheb ; Thakur, Vikas Singh ; Bhadra, Abhirup LU
; Banerjee, Swastika
; Kundu, Dipan
and Raj, C. Retna
(2026)
In Advanced Functional Materials
36(23).
- Abstract
- Aqueous zinc-ion batteries have emerged as strong contenders for
sustainable energy storage; however, their widespread adoption is
constrained by sluggish Zn2+ transport and suboptimal cathode performance. A rapid, energy-efficient solvothermal synthesis of Na2V6O16
is reported, and introduces cation vacancies via initial
electrochemical engineering. This electrochemical pre-treatment
generates Na⁺ vacancies, significantly enhances Zn2+ diffusion, and enables synergistic Zn2+/H+ co-storage. Ex situ and operando
analyses, supported by theoretical and computational studies, confirm
the pivotal role of Na⁺ vacancies in... (More) - Aqueous zinc-ion batteries have emerged as strong contenders for
sustainable energy storage; however, their widespread adoption is
constrained by sluggish Zn2+ transport and suboptimal cathode performance. A rapid, energy-efficient solvothermal synthesis of Na2V6O16
is reported, and introduces cation vacancies via initial
electrochemical engineering. This electrochemical pre-treatment
generates Na⁺ vacancies, significantly enhances Zn2+ diffusion, and enables synergistic Zn2+/H+ co-storage. Ex situ and operando
analyses, supported by theoretical and computational studies, confirm
the pivotal role of Na⁺ vacancies in facilitating ion transport and
improving capacity. The vacancy-engineered cathode exhibits a high
discharge capacity of 692.8 mAh g−1 at 100 mA g−1, delivering an energy density of 467.6 Wh kg−1 and outstanding cycling stability over 10 000 cycles at 10 A g−1. It also sustains a capacity of 366.6 mAh g−1 at 1000 mA g−1 and retains 395.2 mAh g−1 at 100 mA g−1
under high mass loading, highlighting its rate capability and practical
applicability. The battery shows fast-charging capability, delivering a
specific capacity of 138.2 mAh g−1 within 12.4 s, and has an
ultra-long cycle life of over 75 000 cycles with capacity loss of only
0.0003% per cycle at a current density of 40 A g−1. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/98f9b92f-a9c1-4a21-8e23-57f7ba625839
- author
- Bag, Saheb
; Thakur, Vikas Singh
; Bhadra, Abhirup
LU
; Banerjee, Swastika
; Kundu, Dipan
and Raj, C. Retna
- publishing date
- 2026
- type
- Contribution to journal
- publication status
- published
- in
- Advanced Functional Materials
- volume
- 36
- issue
- 23
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:105020906384
- ISSN
- 1616-3028
- DOI
- 10.1002/adfm.202515788
- language
- English
- LU publication?
- no
- id
- 98f9b92f-a9c1-4a21-8e23-57f7ba625839
- date added to LUP
- 2026-03-04 09:59:09
- date last changed
- 2026-08-08 13:39:54
@article{98f9b92f-a9c1-4a21-8e23-57f7ba625839,
abstract = {{Aqueous zinc-ion batteries have emerged as strong contenders for <br>
sustainable energy storage; however, their widespread adoption is <br>
constrained by sluggish Zn<sup>2+</sup> transport and suboptimal cathode performance. A rapid, energy-efficient solvothermal synthesis of Na<sub>2</sub>V<sub>6</sub>O<sub>16</sub><br>
is reported, and introduces cation vacancies via initial <br>
electrochemical engineering. This electrochemical pre-treatment <br>
generates Na⁺ vacancies, significantly enhances Zn<sup>2+</sup> diffusion, and enables synergistic Zn<sup>2+</sup>/H<sup>+</sup> co-storage. Ex situ and <i>operando</i><br>
analyses, supported by theoretical and computational studies, confirm <br>
the pivotal role of Na⁺ vacancies in facilitating ion transport and <br>
improving capacity. The vacancy-engineered cathode exhibits a high <br>
discharge capacity of 692.8 mAh g<sup>−1</sup> at 100 mA g<sup>−1</sup>, delivering an energy density of 467.6 Wh kg<sup>−1</sup> and outstanding cycling stability over 10 000 cycles at 10 A g<sup>−1</sup>. It also sustains a capacity of 366.6 mAh g<sup>−1</sup> at 1000 mA g<sup>−1</sup> and retains 395.2 mAh g<sup>−1</sup> at 100 mA g<sup>−1</sup><br>
under high mass loading, highlighting its rate capability and practical<br>
applicability. The battery shows fast-charging capability, delivering a<br>
specific capacity of 138.2 mAh g<sup>−1</sup> within 12.4 s, and has an<br>
ultra-long cycle life of over 75 000 cycles with capacity loss of only <br>
0.0003% per cycle at a current density of 40 A g<sup>−1</sup>.}},
author = {{Bag, Saheb and Thakur, Vikas Singh and Bhadra, Abhirup and Banerjee, Swastika and Kundu, Dipan and Raj, C. Retna}},
issn = {{1616-3028}},
language = {{eng}},
number = {{23}},
publisher = {{Wiley-Blackwell}},
series = {{Advanced Functional Materials}},
title = {{Vacancy‐Engineered Vanadium Cathode for Fast‐Charging Aqueous Zinc Batteries of Ultra‐Long Cycle Life}},
url = {{http://dx.doi.org/10.1002/adfm.202515788}},
doi = {{10.1002/adfm.202515788}},
volume = {{36}},
year = {{2026}},
}