Hao, Zhangxiang;
Chen, Jie;
Lu, Xuekun;
Kang, Liqun;
Tan, Chun;
Xu, Ruoyu;
Yuan, Lixia;
... Huang, Yunhui; + view all
(2022)
Precisely visit the performance modulation of functionalized separator in Li-S batteries via consecutive multiscale analysis.
Energy Storage Materials
, 49
pp. 85-92.
10.1016/j.ensm.2022.04.003.
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Abstract
Despite progress of functionalized separator in preventing the shuttle effect and promoting the sulfur utilization, the precise and non-destructive investigation of structure-function-performance associativity remains limited so far in Li-S batteries. Here, we build consecutive multiscale analysis via combining X-ray absorption fine structure (XAFS) and X-ray computational tomography (CT) techniques to precisely visit the structure-function-performance relationship. XAFS measurement offers the atomic scale changes in the chemical structure and environment. Moreover, a non-destructive technique of X-ray CT proves the functionalized separator role for microscopic scale, which is powerful chaining to bridge the chemical structures of the materials with the overall performance modulation of cells. Benefiting from this consecutive multiscale analysis, we report that the uniform doping of Sr2+ into the perovskite LaMnO3-δ material changes the Mn oxidation states and conductivity (chemical structure), leading to effective lithium polysulfide trapping and accelerated sulfur redox (separator function), and resulting in outstanding cell performance.
| Type: | Article |
|---|---|
| Title: | Precisely visit the performance modulation of functionalized separator in Li-S batteries via consecutive multiscale analysis |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ensm.2022.04.003 |
| Publisher version: | https://doi.org/10.1016/j.ensm.2022.04.003 |
| Language: | English |
| Additional information: | Copyright © 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) |
| Keywords: | Precisely visit, Performance modulation, Functionalized separator, Li-S batteries, Consecutive multiscale analysis |
| 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/10147015 |
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