| Title |
Stable Na Electrodeposition Enabled by Agarose-Based Water-Soluble Sodium Ion Battery Separators |
| ID_Doc |
21876 |
| Authors |
Ojanguren, A; Mittal, N; Lizundia, E; Niederberger, M |
| Title |
Stable Na Electrodeposition Enabled by Agarose-Based Water-Soluble Sodium Ion Battery Separators |
| Year |
2021 |
| Published |
Acs Applied Materials & Interfaces, 13.0, 18 |
| DOI |
10.1021/acsami.1c02135 |
| Abstract |
Developing efficient energy storage technologies is at the core of current strategies toward a decarbonized society. Energy storage systems based on renewable, nontoxic, and degradable materials represent a circular economy approach to address the environmental pollution issues associated with conventional batteries, that is, resource depletion and inadequate disposal. Here we tap into that prospect using a marine biopolymer together with a water-soluble polymer to develop sodium ion battery (NIB) separators. Mesoporous membranes comprising agarose, an algae-derived polysaccharide, and poly(vinyl alcohol) are synthesized via nonsolvent-induced phase separation. Obtained membranes outperform conventional non-degradable NIB separators in terms of thermal stability, electrolyte wettability, and Na+ conductivity. Thanks to the good interfacial adhesion with metallic Na promoted by the hydroxyl and ether functional groups of agarose, the separators enable a stable and homogeneous Na deposition with limited dendrite growth. As a result, membranes can operate at 200 mu A cm(-2), in contrast with Celgard and glass microfiber, which short circuit at 50 and 100 mu A cm(-2), respectively. When evaluated in Na3V2(PO4)(3)/Na half-cells, agarose-based separators deliver 108 mA h g(-1) after 50 cycles at C/10, together with a remarkable rate capability. This work opens up new possibilities for the use of water-degradable separators, reducing the environmental burdens arising from the uncontrolled accumulation of electronic waste in marine or land environments. |
| Author Keywords |
agarose; degradability; sodium ion battery (NIB); sodium plating/stripping; battery life span; circular economy |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000651750000032 |
| WoS Category |
Nanoscience & Nanotechnology; Materials Science, Multidisciplinary |
| Research Area |
Science & Technology - Other Topics; Materials Science |
| PDF |
|