The use of water-processable binders could lower production costs and grant easier and more environment-friendly production of Li-ion batteries. This work investigates the use of two water-processable binders, namely polyvinylacetate (PVA) and sodium alginate (Alg), in high-voltage cathode electrodes for Li-ion batteries. We focused our work on the use of these sustainable binders for cathodes based on LiNi0.5Mn1.5O4, a commercially available material with a very high Li+ deinsertion/insertion potential (4.7-4.75 V versus Li+/Li) and a theoretical specific capacity of 147 mAh g-1. The electrochemical performance of cathodes with PVA and Alg are compared to that of PVdF-based electrodes at 30°C in conventional electrolyte. Among all, Alg-based cathodes show the best rate capability up to 5C and cycle stability, with 95% capacity retention after 100 cycles because of the formation of a thinner and less resistive layer on the electrode than PVA- or PVdF-based cathodes.

New formulations of high-voltage cathodes for Li-ion batteries with water-processable binders

DE GIORGIO, FRANCESCA;SOAVI, FRANCESCA;ARBIZZANI, CATIA
2016

Abstract

The use of water-processable binders could lower production costs and grant easier and more environment-friendly production of Li-ion batteries. This work investigates the use of two water-processable binders, namely polyvinylacetate (PVA) and sodium alginate (Alg), in high-voltage cathode electrodes for Li-ion batteries. We focused our work on the use of these sustainable binders for cathodes based on LiNi0.5Mn1.5O4, a commercially available material with a very high Li+ deinsertion/insertion potential (4.7-4.75 V versus Li+/Li) and a theoretical specific capacity of 147 mAh g-1. The electrochemical performance of cathodes with PVA and Alg are compared to that of PVdF-based electrodes at 30°C in conventional electrolyte. Among all, Alg-based cathodes show the best rate capability up to 5C and cycle stability, with 95% capacity retention after 100 cycles because of the formation of a thinner and less resistive layer on the electrode than PVA- or PVdF-based cathodes.
Bigoni, F.; De Giorgio, F.; Soavi, F.; Arbizzani, C.
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/566883
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 6
social impact