Cold Sintering of a Covalently Bonded MoS2/Graphite Composite as a High Capacity Li-Ion Electrode


Nayir S., Waryoba D. R. , Rajagopalan R., Arslan C., Randall C. A.

CHEMNANOMAT, vol.4, no.10, pp.1088-1094, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 4 Issue: 10
  • Publication Date: 2018
  • Doi Number: 10.1002/cnma.201800342
  • Title of Journal : CHEMNANOMAT
  • Page Numbers: pp.1088-1094

Abstract

A cold sintering approach is demonstrated to fabricate highly dense electrochemically active MoS2/graphite (MG) composites with 88% relative density at an extremely low processing temperature of 140 degrees C. The process provides a pathway to sinter covalently bonded materials effectively to produce either dense or near dense pellets and/or thick films. Composites that include up to 20 wt% graphite, as well as a Li-ionic solid electrolyte (lithium aluminum germanium phosphate) could be easily integrated and densified using this method. Cold sintering also offers an elegant approach to achieve very low interfacial electrode resistances (similar to 42 Omega cm(2)) through the densification process. The specific capacity of the fabricated composite electrode was similar to 950 mAh/g at 0.1 A/g and also displayed good capacity retention at higher current densities.