Operational strategy for multiredox-reaction electrodes for long-lifespan Na-ion hybrid capacitors
SCIE
SCOPUS
- Title
- Operational strategy for multiredox-reaction electrodes for long-lifespan Na-ion hybrid capacitors
- Authors
- HONG, TAE HWA; KIM, JAE DUK; KANG, WOOSUK; LEE, YOON HAK; JO, CHANGSHIN; LEE, JUNG TAE
- Date Issued
- 2023-11
- Publisher
- Elsevier BV
- Abstract
- The development of high-performance sodium storage materials is becoming necessary owing to the limited availability of lithium. Materials undergoing a multiredox-reaction mechanism are highly promising for sodium-ion batteries (SIBs) and sodium-ion hybrid capacitors (SICs). In this study, we propose an opera-tional strategy for improving the cycling lifespan of multiredox-reaction materials in SIBs and SICs. The efficiency of this strategy was evaluated using a Na2VTi (PO4)3@C (NVTP@C) electrode with three redox reaction sites (V2+/V3+, Ti3+/Ti4+, and V3+/V4+). Electrochemical studies revealed that the exclusion of the most unfavorable reaction of NVTP@C (i.e., the V2+/V3+redox reaction) is effective in reducing the voltage hysteresis of Na||NVTP@C half-cells and NVTP@C||AC hybrid ion capacitor systems, thereby extending their cycling life. Thus, based on a fundamental understanding of multiredox materials, our strategy can be used to design advanced SIBs and SICs based on multiredox-reaction mechanisms.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/120925
- DOI
- 10.1016/j.cej.2023.146132
- ISSN
- 1385-8947
- Article Type
- Article
- Citation
- Chemical Engineering Journal, vol. 475, 2023-11
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- There are no files associated with this item.
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