Work

CuInSe 2 /N‐Doped Carbon Nanofibers Enable Durable and Fast Sodium Storage via a Multifunctional InSe Framework

Year: 2026

Type: article

Abstract: Metal selenides are attractive anode candidates for sodium‐ion batteries due to their superior theoretical capacity and weak metal–Se bonds. However, their practical deployment is hampered by sluggish kinetics and severe volume expansion during cycling. Herein, strongly bonded InSe motifs are integrated into the Cu 2− x Se lattice to form CuInSe 2 , which synergistically enhances sodium storage kinetics and durability. During the conversion reaction, the InSe motifs evolve into intercalative In 6 Se 7 framework, converting sluggish bonding breaking/reforming behavior into rapid ion insertion/extraction. Additionally, this framework provides a robust space‐confinement and conductive platform, ensuring high reversibility and fast kinetics of the redox reactions. The well‐designed CuInSe 2 /N‐doped carbon nanofibers composite demonstrates superior cycling stability of 84.8% capacity retention after 5000 cycles and decent rate performance of 234.3 mAh −1 at 10 A g −1 . Even at −20 °C, it exhibits fast‐charging performance at 2 A g −1 and durability over 900 cycles. The in situ incorporation of a multifunctional framework offers a new solution for developing advanced conversion‐based anode materials.

Source: Batteries & Supercaps

DOI: 10.1002/batt.202500814

Authors: Hui Ping Li, Jian Hui Jia, Hong Zhang, Chang Chun Wang, Chun Cheng Yang, Qing Jiang

Institutions: Jilin University, Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, China National Nuclear Corporation

Language: English

Topic: Advancements in Battery Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: National Natural Science Foundation of China, People's Government of Jilin Province, Fundamental Research Funds for the Central Universities