Porous RuO2 nanosheet/CNT electrodes for DMSO-based Li-O2 and Li ion O2 batteries
In: Energy Storage Materials, Jg. 8 (2017-07-01), S. 110-118
Online
unknown
Zugriff:
Two-dimensional (2D) porous RuO 2 nanosheets are synthesized using graphene oxide as the template, on which numerous holes of a few nanometers in diameter are simultaneously created. The holey RuO 2 nanosheets are rationally assembled with carbon nanotube (CNT) interlayers to form a hybrid with highly enhanced mass/electron transport through the conductive, porous structure. The 2D/1D hybrid electrodes deliver exceptional performance in Li-oxygen batteries (LOBs). The first-principle calculations combined with microscopy reveal that Li 2 O 2 interacts strongly with RuO 2 and thermodynamically follows a Stranski-Krastanov growth mode. The state hybridization transforms inherently insulative Li 2 O 2 conductive, reducing the overpotentials encouraged by the Ohmic loss. The highly LiO 2 -soluble dimethyl sulfoxide-based electrolyte is employed for the first time to prepare Li ion oxygen batteries (LIOBs) through refining the solid-electrolyte interphase and concentrated electrolyte. This approach effectively mitigates the energy mismatch present between the lowest unoccupied molecular orbitals of electrolyte and the work functions of Si/C anode. The LIOBs with the developed RuO 2 /CNT hybrid electrodes deliver cyclic stability and ultrahigh gravimetric energy and power densities up to 1897 W h kg −1 and 1396 W kg −1 , respectively. This work offers new insights into designing highly porous 2D/1D oxygen catalysts together with highly LiO 2 -soluble electrolytes for high-performance LOBs/LIOBs.
Titel: |
Porous RuO2 nanosheet/CNT electrodes for DMSO-based Li-O2 and Li ion O2 batteries
|
---|---|
Autor/in / Beteiligte Person: | Huang, He ; Qin, Lei ; Huang, Jiaqiang ; Sadighi, Zoya ; Huang, Baoling ; Yao, Shanshan ; Cui, Jiang ; Xu, Zhenglong ; Jin, Zhaoxin ; Jang Kyo Kim |
Link: | |
Zeitschrift: | Energy Storage Materials, Jg. 8 (2017-07-01), S. 110-118 |
Veröffentlichung: | Elsevier BV, 2017 |
Medientyp: | unknown |
ISSN: | 2405-8297 (print) |
DOI: | 10.1016/j.ensm.2017.05.004 |
Schlagwort: |
|
Sonstiges: |
|