Journal
CHEMNANOMAT
Volume 8, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.202200164
Keywords
aqueous binders; alginate; Prussian blue analogues; silicon anode; Lithium-ion batteries
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Funding
- National Natural Science Foundation of China [22008026]
- Sichuan Province Science and Technology Support Program [2069998]
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An aqueous three-dimensional crosslinked alginate-Zn-Prussian blue analogue binder has been developed for Si anodes, offering improved mechanical properties and higher capacity. The binder is fabricated through Zn2+ ion-induced co-precipitation reaction and ionic crosslinking reaction, resulting in enhanced stability and supramolecular interactions.
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.
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