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Li, Junfeng, San Hui, Kwan 
ORCID: https://orcid.org/0000-0001-7089-7587, Zheng, Yunshan, Ji, Shunping, Wang, Kaixi, Zha, Chenyang, Anh Dinh, Duc, Fan, Xi, Chen, Fuming, Shao, Zongping and Nam Hui, Kwun
(2022)
Stabilizing anionic redox processes in electrospun NiS2–based cathode towards durable aluminum-ion batteries.
Chemical Engineering Journal, 450 (Part 4).
ISSN 1385-8947
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Abstract
Rechargeable aluminum-ion batteries (AIBs) are receiving considerable attention as a desirable device for large-scale energy storage owing to high theoretical capacity and abundance of aluminum. However, due to strong charge of Al 3+, the state-of-the-art AIBs often show sluggish electrode reaction kinetics and rapid capacity fading and the available cathode materials always demonstrate poor structural stability, thereby greatly hindering their practical use. NiS 2 with anion redox species (S 2 2– dimers) and favorable electronic conductivity is a promising cathode to boost the performance of AIBs in terms of reversible capacity, rate capability and cycling stability. Here, we report a systematic investigation of the Al storage behavior and mechanism of NiS 2/S-doped carbon (NiS 2/SC) cathode based on a series of electrochemical tests and ex situ measurements. We further develop electrospun NiS 2/S-doped carbon@S-doped carbon nanofiber (NiS 2/SC@SCNF) structure as the cathode of AIBs. The as-fabricated AIB delivers an unprecedented Al 3+ storage performance with a stable capacity of 76 mAh/g at 0.5 A/g CV 500 cycles and a superior cycling Coulombic efficiency of 97 %. This study reveals that NiS 2/SC@SCNF undergoes a reversible evolution of initial Al 3+ insertion followed by anionic redox between S 2 2– and S 2–, paving the road for the futher development of NiS 2–based cathodes for AIBs.
| Item Type: | Article |
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| Additional Information: | Acknowledgements: This work was funded by the Science and Technology Development Fund, Macau SAR (File no. 0191/2017/A3, 0041/2019/A1, 0046/2019/AFJ, 0021/2019/AIR, 0007/2021/AGJ), University of Macau (File no. MYRG2017-00216-FST, MYRG2018-00192-IAPME, MYRG2020-00187-IAPME), the UEA funding, Science and Technology Program of Guangzhou (2019050001), and National Key Research and Development Program of China (2019YFE0198000). F. Chen acknowledges the Pearl River Talent Program (2019QN01L951). |
| Uncontrolled Keywords: | aluminum-ion batteries,anionic redox,electrospun,nis -based electrode,chemistry(all),environmental chemistry,chemical engineering(all),industrial and manufacturing engineering ,/dk/atira/pure/subjectarea/asjc/1600 |
| Faculty \ School: | Faculty of Science > School of Engineering University of East Anglia Research Groups/Centres > Theme - ClimateUEA |
| UEA Research Groups: | Faculty of Science > Research Groups > Emerging Technologies for Electric Vehicles (EV) Faculty of Science > Research Groups > Energy Materials Laboratory |
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| Depositing User: | LivePure Connector |
| Date Deposited: | 26 Jul 2022 10:30 |
| Last Modified: | 22 Jul 2023 01:38 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/86859 |
| DOI: | 10.1016/j.cej.2022.138237 |
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