Journal article
Liquid Exfoliated SnP3 Nanosheets for Very High Areal Capacity Lithium-Ion Batteries
Publication Details
Authors: | Tian, R.; Griffin, A.; McCrystall, M.; Breshears, M.; Harvey, A.; Gabbett, C.; Horvath, D.; Backes, C.; Jing, Y.; Heine, T.; Park, S.; Coelho, J.; Nicolosi, V.; Nentwig, M.; Benndorf, C.; Oeckler, O.; Coleman, J. |
Publisher: | WILEY-V C H VERLAG GMBH |
Publication year: | 2021 |
Journal: | Advanced Energy Materials |
Pages range : | 2002364 |
Volume number: | 11 |
Issue number: | 4 |
Number of pages: | 13 |
ISSN: | 1614-6832 |
DOI-Link der Erstveröffentlichung: |
Abstract
Increasing the energy density of lithium-ion batteries requires the discovery of new electrode materials capable of achieving very high areal capacity. Here, liquid phase exfoliation is used to produce nanosheets of SnP3, a 2D material with extremely high theoretical capacity of 1670 mAh g(-1). These nanosheets can be fabricated into solution-processed thin films for use as lithium storing anodes. To maximize their performance, carbon nanotubes are incorporated into the electrodes to simultaneously enhance conductivity and toughness. As a result, electrodes of thickness >300 mu m can be produced, which display active-mass-normalized capacities (approximate to 1657 mAh g(Active)(-1)) very close to the theoretical value. These materials show maximum specific (approximate to 1250 mAh g(Electrode)(-1)) and areal (>20 mAh cm(-2)) capacities, which are at the state-of-the-art for 2D-based electrodes, coupled with good rate performance and stability. In combination with commercial cathode materials, full-cells are fabricated with areal capacities of approximate to 29 mAh cm(-2) and near-record energy densities approaching 1000 Wh L-1.
Increasing the energy density of lithium-ion batteries requires the discovery of new electrode materials capable of achieving very high areal capacity. Here, liquid phase exfoliation is used to produce nanosheets of SnP3, a 2D material with extremely high theoretical capacity of 1670 mAh g(-1). These nanosheets can be fabricated into solution-processed thin films for use as lithium storing anodes. To maximize their performance, carbon nanotubes are incorporated into the electrodes to simultaneously enhance conductivity and toughness. As a result, electrodes of thickness >300 mu m can be produced, which display active-mass-normalized capacities (approximate to 1657 mAh g(Active)(-1)) very close to the theoretical value. These materials show maximum specific (approximate to 1250 mAh g(Electrode)(-1)) and areal (>20 mAh cm(-2)) capacities, which are at the state-of-the-art for 2D-based electrodes, coupled with good rate performance and stability. In combination with commercial cathode materials, full-cells are fabricated with areal capacities of approximate to 29 mAh cm(-2) and near-record energy densities approaching 1000 Wh L-1.
Keywords
(3) nanosheets, Carbon nanotubes, high areal capacity, high energy density, ion batteries, lithium‐, SnP
