High-performance SiOxanode based on a pre-lithiation sodium alginate binder
Journal
Journal of Power Sources
Journal Volume
663
Start Page
238904
ISSN
03787753
Date Issued
2026-01-30
Author(s)
Abstract
The development of new high-performance binders is an effective strategy for lithium-ion batteries to cope with the volume expansion of SiOx anodes during cycling. In this study, a strategy is adopted for utilizing pre-lithiated sodium alginate (SA-LiCl40) as a high-performance SiOx anode binder. The addition of LiCl not only enables the linear SA binder to link into a three-dimensional network structure but also enriches a large number of lithium carboxylate groups, improving the Li+transport rate within the anode. As a result, the mechanical properties of the binder increase, and interfacial adhesion between the copper current collector and the SiOx anode stabilizes, efficiently inhibiting volume expansion while enhancing cycling stability and initial Coulombic efficiency (ICE). When SA-LiCl40 serves as the binder for the SiOx anode, the ICE significantly improves by 13.5 %. A discharge capacity of 918.2 mA h g−1is obtained after 100 cycles, and a high reversible capacity of 791.9 mA h g−1is achieved after 300 cycles at 1 A g−1. Therefore, this work provides novel insights into developing new binders for high-performance SiOx anodes in lithium-ion batteries.
Subjects
Electrochemical property
Lithium-ion battery
Pre-lithiated
SiOx
Sodium alginate binder
Publisher
Elsevier B.V.
Type
journal article