Wang, Jing;
Xu, Zhen;
Zhang, Qicheng;
Song, Xin;
Lu, Xuekun;
Zhang, Zhenyu;
Onyianta, Amaka J;
... Eichhorn, Stephen J; + view all
(2022)
Stable Sodium-Metal Batteries in Carbonate Electrolytes Achieved by Bifunctional, Sustainable Separators with Tailored Alignment.
Advanced Materials
, 34
(49)
, Article 2206367. 10.1002/adma.202206367.
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Abstract
Sodium (Na) is the most appealing alternative to lithium as an anode material for cost-effective, high-energy-density energy storage systems by virtue of its high theoretical capacity and abundance as a resource. However, the uncontrolled growth of Na dendrites and the limited cell cycle life impede the large-scale practical implementation of Na-metal batteries (SMBs) in commonly-used and low-cost carbonate electrolytes. Herein, the employment of a novel bifunctional electrospun nanofibrous separator comprising the well-ordered, uniaxially-aligned arrays and abundant sodiophilic functional groups is presented for SMBs. By tailoring the alignment degree, this unique separator integrates with the merits of serving as highly-aligned ion-redistributors to self-orientate/homogenize the Na-ions flux from a chemical molecule level and physically suppressing the Na dendrites puncture at a mechanical structure level. Remarkably, unprecedented long-term cycling performances at high current densities (≥ 1000 h at 1 and 3 mA cm-2 , ≥ 700 h at 5 mA cm-2 ) of symmetric cells are achieved in additive-free carbonate electrolytes. Moreover, the corresponding sodium-organic battery demonstrates a high energy density and prolonged cyclability over 1000 cycles. This work opens up a new and facile avenue for the development of stable, low-cost, and safe-credible SMBs, which could be readily extended to other alkali-metal batteries. This article is protected by copyright. All rights reserved.
| Type: | Article |
|---|---|
| Title: | Stable Sodium-Metal Batteries in Carbonate Electrolytes Achieved by Bifunctional, Sustainable Separators with Tailored Alignment |
| Location: | Germany |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adma.202206367 |
| Publisher version: | https://doi.org/10.1002/adma.202206367 |
| Language: | English |
| Additional information: | © 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Sodium-metal batteries, carbonate electrolytes, highly-aligned nanofibers, long cycle life, sustainable separators |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10156246 |
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