Work

Harnessing N─H···O═V Bonding Toward Stable Vanadium Cathodes in Ah‐Level Zn‐Ion Batteries

Year: 2026

Type: article

Abstract: ABSTRACT The vanadium‐based batteries deliver great potential in Ah‐level energy storage systems, ascribing to their high specific capacity. Nevertheless, the metal‐oxygen bonds are unstable in aqueous electrolytes, resulting in structural degradation and capacity attenuation. Here, inspired by the robust N─H···O═C bonding that stabilizes protein structures, we propose a bioinspired polymer‐integrated electrolyte based on poly(N‐acryloyl glycinamide) (PNAGA). The amide‐rich N‐H groups in PNAGA can anchor onto vanadium oxide units (O═V) via strong protein‐like intermolecular N─H···O═V interactions, which effectively stabilize the cathode framework by suppressing vanadium dissolution and preserving structural integrity during Zn 2+ intercalation and deintercalation. In addition, the PNAGA can establish an electron‐enriched environment on the vanadium cathode surface via N─H···O═V hydrogen bonding to accelerate redox kinetics for high rate capability and cycling stability. Consequently, the Zn/Zn 0.25 V 2 O 5 full battery delivers a high specific capacity of 286.2 mA h g −1 with 97% capacity retention over 1000 cycles at 2 A g −1 . Meanwhile, the PNAGA‐enabled pouch cell can achieve 1.35 Ah at 0.15 A g −1 , demonstrating a universal molecular design strategy for high‐performance aqueous vanadium‐based batteries.

Source: Advanced Materials

DOI: 10.1002/adma.73731

Authors: Yifan Pan, Doudou Feng, Yanchun Xie, Yucong Jiao, Peiyi Wu

Institutions: Donghua University, City University of Hong Kong, Chinese Academy of Sciences, Xinjiang Technical Institute of Physics & Chemistry

Language: English

Topic: Advanced battery technologies research

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funders: Natural Science Foundation of Shanghai, National Natural Science Foundation of China