Work

Enhanced Stability of Sodium Metal Anodes in Covalent Triazine Frameworks via Progressive Nucleation with Optimized Conducting Composite Matrix

Year: 2025

Type: article

Abstract: Organic materials offer exciting possibilities to improve rechargeable battery performance in multiple ways. This study explores the Covalent Triazine Framework (CTF) as an interlayer to modulate progressive sodium nucleation and subsequent recurrent deposition/extraction in an anode‐less sodium battery. The optimized composite, C60R40, which combines CTF with reduced graphene oxide (rGO), has demonstrated its effectiveness as a host. In half cell Na electrodeposition, the C60R40 host exhibits 99.9% coulombic efficiency at an applied current density and areal capacity of 6 mA cm −2 and 2 mAh cm −2 , respectively, for 500 cycles. The stable performance is also observed in both full‐cell and anode‐less battery configurations. When paired with Na 3 V 2 (PO 4 ) 2 F 3 , the sodium‐plated C60R40 demonstrated a stable discharge capacity of 110 mAh g −1 . Furthermore, the anode‐less sodium battery configuration, with Na 3 V 2 (PO 4 ) 3 cathode, achieved a promising discharge capacity exceeding 50 mAh g −1 without any additional modifications. These findings highlight the significant role of organic materials in improving the performance of rechargeable sodium metal batteries.

Source: Small

DOI: 10.1002/smll.202502636

Authors: Kundan Wasnik, Rajesh C. Bhatt, Manjusha V. Shelke

Institutions: National Chemical Laboratory, Academy of Scientific and Innovative Research

Language: English

Topic: Advanced Battery Materials and Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: Department of Science and Technology, Ministry of Science and Technology, India, Council of Scientific and Industrial Research, India, University Grants Commission, Science and Engineering Research Board