Unlocking High-Current Performance in Silicon Anode: Synergistic Phosphorus Doping and Nitrogen-Doped Carbon Encapsulation to Enhance Lithium Diffusivity.

Autor: Firdaus AM; Materials Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia., Hawari NH; Materials Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia., Adios CG; Materials Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia., Nasution PM; Materials Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia., Peiner E; Institute of Semiconductor Technology (IHT) and Laboratory for Emerging Nanometrology (LENA), Technische Universität Braunschweig, Hans-Sommer-Straße 66, Braunschweig, 38106, Germany., Wasisto HS; PT Nanosense Instrument Indonesia, Umbulharjo, Yogyakarta 55167, Indonesia., Sumboja A; Materials Science and Engineering Research Group, Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia.; Research Collaboration Center for Advanced Energy Materials, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2024 Apr 02; Vol. 19 (7), pp. e202400036. Date of Electronic Publication: 2024 Mar 13.
DOI: 10.1002/asia.202400036
Abstrakt: The silicon (Si) offers enormous theoretical capacity as a lithium-ion battery (LIB) anode. However, the low charge mobility in Si particles hinders its application for high current loading. In this study, ball-milled phosphorus-doped Si nanoparticles encapsulated with nitrogen-doped carbon (P-Si@N-C) are employed as an anode for LIBs. P-doped Si nanoparticles are first obtained via ball-milling and calcination of Si with phosphoric acid. N-doped carbon encapsulation is then introduced via carbonization of the surfactant-assisted polymerization of pyrrole monomer on P-doped Si. While P dopant is required to support the stability at high current density, the encapsulation of Si particles with N-doped carbon is influential in enhancing the overall Li + diffusivity of the Si anode. The combined approaches improve the anode's Li + diffusivity up to tenfold compared to the untreated anode. It leads to exceptional anode stability at a high current, retaining 87 % of its initial capacity under a large current rate of 4000 mA g -1 . The full-cell comprising P-Si@N-C anode and LiFePO 4 cathode demonstrates 94 % capacity retention of its initial capacity after 100 cycles at 1 C. This study explores the effective strategies to improve Li + diffusivity for high-rate Si-based anode.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: