Multifunctional Polymeric Phthalocyanine-Coated Carbon Nanotubes for Efficient Redox Mediators of Lithium-Sulfur Batteries
- Authors
- Kim, Y[Kim, Yoonbin]; Kim, WI[Kim, Won Il]; Park, H[Park, Hyunyoung]; Kim, JS[Kim, Jun Su]; Cho, H[Cho, Hyungyu]; Yeon, JS[Yeon, Jeong Seok]; Kim, J[Kim, Jongsoon]; Kim, YJ[Kim, Young-Jun]; Lee, J[Lee, Jeongyeon]; Park, HS[Park, Ho Seok]
- Issue Date
- Jun-2023
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- coordination chemistry; lithium-sulfur batteries; molecular design; polymeric phthalocyanine; redox mediators
- Citation
- ADVANCED ENERGY MATERIALS, v.13, no.22
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED ENERGY MATERIALS
- Volume
- 13
- Number
- 22
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/103246
- DOI
- 10.1002/aenm.202204353
- ISSN
- 1614-6832
- Abstract
- Metal phthalocyanine (Pc) complexes are considered to be promising functional organic materials owing to their tunable properties and unique pi-electron structure. Despite these advantages, the application of polymeric metal Pc into lithium-sulfur (Li-S) batteries has yet to be explored. Herein, this work demonstrates a molecular design of multifunctional polymeric cobalt Pc with triethylene glycol linkers (TCP) that provide a redox mediating capability for the Co ion in the center of the Pc, a strong polar interaction of N atoms with Li, and the lithiophilic sites of crown ether mimicking linkers for highly efficient Li-S batteries. As verified by electrochemical and theoretical analyses, the cooperative redox mediating and lithiophilic effects of TCP coated onto multiwalled carbon nanotube (TCP/MC) are attributed to the facilitated conversion reaction kinetics of S cathodes for the high utilization efficiency of S and the inhibition of polysulfide shuttling. Consequently, the S@TCP/MC delivers high discharge capacity of 1392.8 mA h g(-1) and high-rate capacity of 667.9 mA h g(-1) at 5.0 C. Moreover, this cathode achieves a high capacity retention of 81.5% over 200 cycles, along with a high areal capacity of 6.83 mA h cm(-2) at 0.2 C with a high S loading of 6.6 mg cm(-2). © 2023 Wiley-VCH GmbH.
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Collections - Engineering > Chemical Engineering > 1. Journal Articles
- Graduate School > Energy Science > 1. Journal Articles
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