An Aqueous Alginate-based Binder Modified with Zn2+ Ions and Prussian Blue Analogues for Enhanced Silicon Anodes

Fang WU*, Ziyu YANG, Jiarun LIU, Xiaoxuan LIU, Jian YANG, Yong XIANG*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

Abstract

In this work, an aqueous three-dimensional (3D) crosslinked alginate-Zn-Prussian blue analogue (Alg−Zn-PBAs) binder with improved mechanical property has been constructed for Si anodes. The Alg−Zn-PBAs aqueous binder is fabricated via Zn2+ ion-induced co-precipitation reaction of PBAs nanoparticles and ionic crosslinking reaction of Alg−Zn network. The anchored PBAs nanoparticles can be formed around the Zn2+ ions and offer enhanced stability due to their strong supramolecular interactions to the Alg−Zn matrix. Consequently, the Si anodes using Alg−Zn-PBAs binder exhibits a capacity of 1372.9 mAh g−1 for 200 cycles at 0.84 A g−1 and a higher capacity when compared to electrodes fabricated by using Alg−Zn binder and Alg binder. This work demonstrates that the combination of PBAs and alginate via an one-step process of Zn2+ ions induced co-precipitation reaction is a better design of aqueous binders for lithium-ion batteries system with a green synthetic process.

Original languageEnglish
Article numbere202200164
Number of pages7
JournalChemNanoMat
Volume8
Issue number6
Early online date26 Apr 2022
DOIs
Publication statusPublished - Jun 2022
Externally publishedYes

Funding

The authors gratefully acknowledge financial support by The National Natural Science Foundation of China (22008026) and Sichuan Province Science and Technology Support Program (2069998).

Keywords

  • alginate
  • aqueous binders
  • Lithium-ion batteries
  • Prussian blue analogues
  • silicon anode

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