Jump to main content
Jump to site search


A high-volumetric-capacity and high-areal-capacity ZnCo2O4 anode for Li-ion battery enabled by a robust biopolymer binder

Abstract

Constructing high-areal-capacity anodes with high loading for Li-ion batteries is still an enormous challenge, due to the drastic volume change of large-capacity anode materials during cycling. Conventional PVDF binder system fails to withstand the degradation of high-loading electrode. Therefore, advanced binders are urgently required. Herein, for the first time, guar gum (GG) biopolymer has been exploited as a robust binder for micro-sized ZnCo2O4 (ZCO) anode materials. Resulting from its robust mechanical properties and strong interactions with ZCO, the cycling stability of ZCO anode has been significantly improved with a capacity of 412 mAh g-1 after 600 cycles at 1200 mA g-1. More importantly, the ZCO can act as “crosslinking agent” to in-situ form a robust network with GG, which efficiently maintains the electrode structure stability. Hence, a ZCO anode with ultrahigh loading of 6.73 mg cm-2 can be achieved and deliver a high areal capacity of 5.6 mAh cm-2. Simultaneously, benefiting from the high tap density of micro-ZCO, the ZCO anode gives a high volumetric capacity of 1179 mAh cm-3. This study will make a significant contribution to accelerating the progress of designing high-areal-capacity anodes.

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Aug 2018, accepted on 07 Sep 2018 and first published on 11 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07840H
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    A high-volumetric-capacity and high-areal-capacity ZnCo2O4 anode for Li-ion battery enabled by a robust biopolymer binder

    J. Liu, Y. Xuan, D. G.D. Galpaya, Y. Gu, Z. Lin, S. Zhang, C. Yan, S. Feng and L. Wang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07840H

Search articles by author

Spotlight

Advertisements