10.1021/acsami.8b18379.s002
Yu-Ting Chen
Yu-Ting
Chen
Syed Ali Abbas
Syed Ali
Abbas
Nahid Kaisar
Nahid
Kaisar
Sheng Hui Wu
Sheng Hui
Wu
Hsin-An Chen
Hsin-An
Chen
Karunakara Moorthy Boopathi
Karunakara Moorthy
Boopathi
Mriganka Singh
Mriganka
Singh
Jason Fang
Jason
Fang
Chun-Wei Pao
Chun-Wei
Pao
Chih-Wei Chu
Chih-Wei
Chu
Mitigating
Metal Dendrite Formation in Lithium–Sulfur
Batteries via Morphology-Tunable Graphene Oxide Interfaces
American Chemical Society
2018
GO-decorated Li anodes exhibit
stability
density
dendrite formation
Morphology-Tunable Graphene Oxide Interfaces
issue
Li metal anodes
Mitigating Metal Dendrite Formation
mA
batterie
coating
macroporou
2018-12-24 00:00:00
Media
https://acs.figshare.com/articles/media/Mitigating_Metal_Dendrite_Formation_in_Lithium_Sulfur_Batteries_via_Morphology-Tunable_Graphene_Oxide_Interfaces/7556825
Despite
issues related to dendrite formation, research on Li metal
anodes has resurged because of their high energy density. In this
study, graphene oxide (GO) layers are decorated onto Li metal anodes
through a simple process of drop-casting and spray-coating. The self-assembly
of GO is exploited to synthesize coatings having compact, mesoporous,
and macroporous morphologies. The abilities of the GO coatings to
suppress dendrite formation are compared through Li|Li symmetrical
cell charging at a current density of 5 mA cm<sup>–2</sup> for
2000 cyclesa particularly abusive test. The macroporous structure
possesses the lowest impedance, whereas the compact structure excels
in terms of stability. Moreover, GO exhibits a low nucleation overpotential
and is transformed into reduced GO with enhanced conductivity during
the operation of the cells; both factors synergistically mitigate
the issue of dendrite formation. Li–S batteries incorporating
the GO-decorated Li anodes exhibit an initial capacity of 850 mA h
g<sup>–1</sup> and maintain their stability for 800 cycles
at a C-rate of 1 C (1675 mA h g<sup>–1</sup>), suggesting the
applicability of GO in future rechargeable batteries.