Abstract
Room-temperature sodium-sulfur (RT Na-S) battery cathodes suffer from poor conductivity, rapid dissolution of intermediate products, and potentially destructive volume change during cycling. The optimal way to minimize these problems could be a construction of a nanocomposite cathode scaffold combining different components selected for their particular functions. Here, we have combined the excellent electronic conductivity of reduced graphene oxide, polysulfide adsorption ability of the ultrafine manganese oxide nanocrystals, rapid ion/electron dissemination efficiency of nanosized sulfur, and outstanding mechanical stiffness and good electrical conductivity of Na alginate/polyaniline hybrid binder in a single electrode heterostructure. At 0.2 A g -1 , an RT Na-S battery containing the freestanding cathode delivers an initial specific cap acity of 631 mA h g -1 . By delivering a nominal discharge voltage of 1.81 V, our Na-S batteries bestow a high specific energy of 737 W h kg -1 at the 2nd cycle and 660 W h kg -1 was retained after 50 cycles. The effect of the amount of electrolyte additive is also well demonstrated in this study. The electrode fabrication process provides a new approach to tailor the design and preparation of effective cathodes for the room-temperature sodium-sulfur batteries.
| Original language | English |
|---|---|
| Pages (from-to) | 14101-14109 |
| Number of pages | 9 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 11 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 17 Apr 2019 |
Keywords
- freestanding cathode
- manganese oxide
- polyaniline
- sodium alginate
- sodium-sulfur batteries
- solid-state Mn NMR spectroscopy
- X-ray photoelectron spectroscopy
Cite this
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Three-Dimensionally Reinforced Freestanding Cathode for High-Energy Room-Temperature Sodium-Sulfur Batteries. / Ghosh, Arnab; Kumar, Ajit; Roy, Amlan; Panda, Manas Ranjan; Kar, Mega; Macfarlane, Douglas R.; Mitra, Sagar.
In: ACS Applied Materials and Interfaces, Vol. 11, No. 15, 17.04.2019, p. 14101-14109.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Three-Dimensionally Reinforced Freestanding Cathode for High-Energy Room-Temperature Sodium-Sulfur Batteries
AU - Ghosh, Arnab
AU - Kumar, Ajit
AU - Roy, Amlan
AU - Panda, Manas Ranjan
AU - Kar, Mega
AU - Macfarlane, Douglas R.
AU - Mitra, Sagar
PY - 2019/4/17
Y1 - 2019/4/17
N2 - Room-temperature sodium-sulfur (RT Na-S) battery cathodes suffer from poor conductivity, rapid dissolution of intermediate products, and potentially destructive volume change during cycling. The optimal way to minimize these problems could be a construction of a nanocomposite cathode scaffold combining different components selected for their particular functions. Here, we have combined the excellent electronic conductivity of reduced graphene oxide, polysulfide adsorption ability of the ultrafine manganese oxide nanocrystals, rapid ion/electron dissemination efficiency of nanosized sulfur, and outstanding mechanical stiffness and good electrical conductivity of Na alginate/polyaniline hybrid binder in a single electrode heterostructure. At 0.2 A g -1 , an RT Na-S battery containing the freestanding cathode delivers an initial specific cap acity of 631 mA h g -1 . By delivering a nominal discharge voltage of 1.81 V, our Na-S batteries bestow a high specific energy of 737 W h kg -1 at the 2nd cycle and 660 W h kg -1 was retained after 50 cycles. The effect of the amount of electrolyte additive is also well demonstrated in this study. The electrode fabrication process provides a new approach to tailor the design and preparation of effective cathodes for the room-temperature sodium-sulfur batteries.
AB - Room-temperature sodium-sulfur (RT Na-S) battery cathodes suffer from poor conductivity, rapid dissolution of intermediate products, and potentially destructive volume change during cycling. The optimal way to minimize these problems could be a construction of a nanocomposite cathode scaffold combining different components selected for their particular functions. Here, we have combined the excellent electronic conductivity of reduced graphene oxide, polysulfide adsorption ability of the ultrafine manganese oxide nanocrystals, rapid ion/electron dissemination efficiency of nanosized sulfur, and outstanding mechanical stiffness and good electrical conductivity of Na alginate/polyaniline hybrid binder in a single electrode heterostructure. At 0.2 A g -1 , an RT Na-S battery containing the freestanding cathode delivers an initial specific cap acity of 631 mA h g -1 . By delivering a nominal discharge voltage of 1.81 V, our Na-S batteries bestow a high specific energy of 737 W h kg -1 at the 2nd cycle and 660 W h kg -1 was retained after 50 cycles. The effect of the amount of electrolyte additive is also well demonstrated in this study. The electrode fabrication process provides a new approach to tailor the design and preparation of effective cathodes for the room-temperature sodium-sulfur batteries.
KW - freestanding cathode
KW - manganese oxide
KW - polyaniline
KW - sodium alginate
KW - sodium-sulfur batteries
KW - solid-state Mn NMR spectroscopy
KW - X-ray photoelectron spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85064658564&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b00203
DO - 10.1021/acsami.9b00203
M3 - Article
C2 - 30919631
AN - SCOPUS:85064658564
VL - 11
SP - 14101
EP - 14109
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
SN - 1944-8244
IS - 15
ER -