Work

Lithium Intercalation Chemistry in TaS2 Nanosheets for Lithium-Ion Batteries Anodes

Year: 2025

Type: article

Abstract: Exploring novel two-dimensional layered transitional metal dichalcogenides and elucidating their reaction mechanism are critical to designing promising anode materials for lithium-ion batteries (LIBs). Herein, a novel layered TaS2 nanosheet was obtained via a typical solid-phase reaction method followed by a simple ball-milling treatment, and first explored experimentally as an anode for LIBs. The TaS2 nanosheet anode delivered an excellent cycling stability, with 234.6 mAh g−1 after 500 cycles at 1 A g−1. The optimized performance could be attributed to the large interlayer spacing, high conductivity, and reduced size of the TaS2 nanosheet, which effectively alleviated the volume change during the reaction process and accelerated the Li+ or e− transport. Especially, the TaS2 nanosheet anode presented an unusual intercalation reaction mechanism, accompanied with a reversible phase transition from the 2H to the 1T phase during the first de-lithiation process, which is evidenced by the multiple ex situ characterizations, further revealing the enhanced electrochemical performance results from the 1T phase with the larger interlayer spacing and higher electrical conductivity. This work provides a novel insight into the intercalation reaction mechanism of TaS2, which shows potential in high-performance LIBs.

Source: Nanomaterials

DOI: 10.3390/nano15080626

Authors: Xuelian Wang, Jin Bai, Xian Zhang, Xiaobo Shen, Zhengrong Xia, Haijun Yu

Institutions: Chinese Academy of Sciences, Hefei Institutes of Physical Science, Huainan Normal University, Institute of Solid State Physics

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: gold

Estimated APC paid: $2,896