Multiple hydrogel alginate binders for Si anodes of lithium-ion battery

Published

Journal Article

© 2017 Elsevier Ltd A series of hydrogel alginate binders (M-alg, M = Al, Ba, Mn, Zn) for Si anode of lithium ion battery are synthesized by coordinating alginate molecule chains with different cations respectively. Among these binders, Al-alg and Ba-alg both present their Vickers hardness higher than 32.0 HV while other M-alg binders show Vickers hardness less than 25.5 HV. The Ba-alg binder exhibits a viscosity of 30270 mPa s while other M-alg binders only show their viscosities less than 1700 mPa s. The Si anodes with Al-alg or Ba-alg both deliver their capacities near 2100 mAh g−1 after 300 cycles at 420 mA g−1, while the electrodes with other M-alg binders show capacities less than 1500 mAh g−1. When the current density is increased to 2100 mA g−1 or the Si loading mass is increased to 1.0–1.2 mg cm−2, the electrodes with Al-alg or Ba-alg still have remarkable advantages. Moreover, the ultrahigh viscosity makes Ba-alg strongly adhere with both Si and current collector, so when the electrodes are fabricated with a material mass ratio of 8:1:1 (Si: acetylene black: binder), the electrode with Ba-alg still delivers an outstanding capacity retention of 49.1% after 200 cycles at 840 mA g−1.

Full Text

Duke Authors

Cited Authors

  • Wu, ZY; Deng, L; Li, JT; Huang, QS; Lu, YQ; Liu, J; Zhang, T; Huang, L; Sun, SG

Published Date

  • August 10, 2017

Published In

Volume / Issue

  • 245 /

Start / End Page

  • 371 - 378

International Standard Serial Number (ISSN)

  • 0013-4686

Digital Object Identifier (DOI)

  • 10.1016/j.electacta.2017.05.094

Citation Source

  • Scopus