View in EDS

Flexible electrode of NiTe2/porous graphene film as binder-free anode for lithium-ion batteries.

Saved in:
Bibliographic Details
Title: Flexible electrode of NiTe2/porous graphene film as binder-free anode for lithium-ion batteries.
Authors: Wu, Ruidi1 (AUTHOR), Gao, Yan1 (AUTHOR), Li, Zhiguo1 (AUTHOR), Zhang, Hongkun2 (AUTHOR) zhk@cutc.net, Zhang, Xiaoting1 (AUTHOR) zhangxt@bift.edu.cn, Wang, Rui1 (AUTHOR) clywangrui@bift.edu.cn
Source: Nanotechnology. 2026, Vol. 37 Issue 9, p1-10. 10p.
Subjects: Lithium-ion batteries, Negative electrode, Energy storage, Electrode performance, Nanocrystals, Covalent bonds, Graphene
Abstract: The NiTe2 nanocrystals anchored on porous graphene films (NiTe2@PG) were fabricated through a sequential process involving vacuum filtration, annealing, and tellurization. Within this structure, the NiTe2 nanocrystals formed via the confined growth of NiTe2 nanoparticles. The morphology and structure of the NiTe2@PG composite was examined by scanning electron microscopy, transmission electron microscopy, and x-ray diffraction, while the interfacial interaction between NiTe2 and graphene was investigated by x-ray photoelectron spectroscopy and Raman spectroscopy. When evaluated as an anode material for lithium-ion batteries, the NiTe2@PG electrode delivered an initial reversible capacity of 875.7 mAh g−1 at a current density of 100 mA g−1. Furthermore, it exhibited outstanding long-term cyclability, retaining specific capacities of 243.5 and 135 mAh g−1 after 10 000 cycles at high current densities of 2 and 5 A g−1, respectively. This remarkable electrochemical performance was attributed to the unique architecture of NiTe2@PG and the robust covalent bonding at the graphene/NiTe2 interface. The porous graphene scaffold serves not only as a conductive substrate for the growth of NiTe2 nanocrystals but also facilitates electron transport. Concurrently, its porous network shortened the diffusion path for Li+ ions and enhanced electrolyte permeability. Moreover, the formation of C–Te–Ni covalent bonds between graphene and NiTe2 played a crucial role in maintaining the structural integrity of the electrode during cycling. [ABSTRACT FROM AUTHOR]
Copyright of Nanotechnology is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:The NiTe2 nanocrystals anchored on porous graphene films (NiTe2@PG) were fabricated through a sequential process involving vacuum filtration, annealing, and tellurization. Within this structure, the NiTe2 nanocrystals formed via the confined growth of NiTe2 nanoparticles. The morphology and structure of the NiTe2@PG composite was examined by scanning electron microscopy, transmission electron microscopy, and x-ray diffraction, while the interfacial interaction between NiTe2 and graphene was investigated by x-ray photoelectron spectroscopy and Raman spectroscopy. When evaluated as an anode material for lithium-ion batteries, the NiTe2@PG electrode delivered an initial reversible capacity of 875.7 mAh g−1 at a current density of 100 mA g−1. Furthermore, it exhibited outstanding long-term cyclability, retaining specific capacities of 243.5 and 135 mAh g−1 after 10 000 cycles at high current densities of 2 and 5 A g−1, respectively. This remarkable electrochemical performance was attributed to the unique architecture of NiTe2@PG and the robust covalent bonding at the graphene/NiTe2 interface. The porous graphene scaffold serves not only as a conductive substrate for the growth of NiTe2 nanocrystals but also facilitates electron transport. Concurrently, its porous network shortened the diffusion path for Li+ ions and enhanced electrolyte permeability. Moreover, the formation of C–Te–Ni covalent bonds between graphene and NiTe2 played a crucial role in maintaining the structural integrity of the electrode during cycling. [ABSTRACT FROM AUTHOR]
ISSN:09574484
DOI:10.1088/1361-6528/ae490c