The Facile and Controllable Synthesis of Ultrafine Sn Nanocrystals Loaded on Carbon Black for High-Performance Lithium Storage.
ChemSusChem
; : e202301807, 2024 Jun 07.
Article
en En
| MEDLINE
| ID: mdl-38847187
ABSTRACT
Sn and C nanocomposites are ideal anode materials for high-energy and high-power density lithium ion batteries. However, their facile and controllable synthesis for practical applications is still a critical challenge. In this work, a facile one-step method is developed to controllably synthesize ultrafine Sn nanocrystals (< 5â
nm) loaded on carbon black (Sn@C) through Na reducing SnCl4 by mechanical milling. Different from traditional up-down mechanical milling method, this method utilizes mechanical milling to trigger bottom-up reduction reaction of SnCl4. The in-situ formed Sn nanocrystals directly grow on carbon black, which results in the homogeneous composite and the size control of Sn nanocrystals. The obtained Sn@C electrode is revealed to possesses large lithium diffusion coefficient, low lithiation energy barrier and stable electrochemical property during cycle, thus showing excellent lithium storage performance with a high reversible capacity (942â
mAh g-1 at a current density of 100â
mA g-1), distinguished rate ability (480â
mAh g-1 at 8000â
mA g-1) and superb cycling performance (730â
mAh g-1 at 1000â
mA g-1 even after 1000â
cycles).
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Año:
2024
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Article