10.1021/acs.nanolett.9b01033.s001
Borui Liu
Borui
Liu
Renheng Bo
Renheng
Bo
Mahdiar Taheri
Mahdiar
Taheri
Iolanda Di Bernardo
Iolanda
Di Bernardo
Nunzio Motta
Nunzio
Motta
Hongjun Chen
Hongjun
Chen
Takuya Tsuzuki
Takuya
Tsuzuki
Guihua Yu
Guihua
Yu
Antonio Tricoli
Antonio
Tricoli
Metal–Organic Frameworks/Conducting Polymer
Hydrogel Integrated Three-Dimensional Free-Standing Monoliths as Ultrahigh
Loading Li–S Battery Electrodes
American Chemical Society
2019
stability
electrolyte
retention
3 D carbon-HKUST
ZIF
electrode architecture
3 D carbon networks
nanodomain
energy density batteries
sulfur loading
charge transfer efficiency
MOF
cm
energy density
mAh
Li
intercalation-type cathode materials
capacity
lithium polysulfide specificities
2019-06-25 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Metal_Organic_Frameworks_Conducting_Polymer_Hydrogel_Integrated_Three-Dimensional_Free-Standing_Monoliths_as_Ultrahigh_Loading_Li_S_Battery_Electrodes/8337158
The
lithium–sulfur (Li–S) system is a promising material
for the next-generation of high energy density batteries with application
extending from electrical vehicles to portable devices and aeronautics.
Despite progress, the energy density of current Li–S technologies
is still below that of conventional intercalation-type cathode materials
due to limited stability and utilization efficiency at high sulfur
loading. Here, we present a conducting polymer hydrogel integrated
highly performing free-standing three-dimensional (3D) monolithic
electrode architecture for Li–S batteries with superior electrochemical
stability and energy density. The electrode layout consists of a highly
conductive three-dimensional network of N,P codoped carbon with well-dispersed
metal–organic framework nanodomains of ZIF-67 and HKUST-1.
The hierarchical monolithic 3D carbon networks provide an excellent
environment for charge and electrolyte transport as well as mechanical
and chemical stability. The electrically integrated MOF nanodomains
significantly enhance the sulfur loading and retention capabilities
by inhibiting the release of lithium polysulfide specificities as
well as improving the charge transfer efficiency at the electrolyte
interface. Our optimal 3D carbon-HKUST-1 electrode architecture achieves
a very high areal capacity of >16 mAh cm<sup>–2</sup> and
volumetric
capacity (<i>C</i><sub>V</sub>) of 1230.8 mAh cm<sup>–3</sup> with capacity retention of 82% at 0.2C for over 300 cycles, providing
an attractive candidate material for future high-energy density Li–S
batteries.