期刊
ACS ENERGY LETTERS
卷 6, 期 5, 页码 1659-1669出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c00560
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资金
- Creative Materials Discovery Program, Republic of Korea [NRF-2017M3D1A1039553, 2017M3D1A1039561]
- National Research Foundation via the Creative Research Initiative Center, Republic of Korea [NRF-2015R1A3A2066191]
- National Research Foundation of Korea [2017M3D1A1039561] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study reveals that the conformational change of a single organic molecule during a redox reaction leads to impressive battery performance. The phenoxazin-3-one derivative is proposed as a new redox-active bioinspired single molecule for Li-ion rechargeable batteries, delivering high discharge capacity and fast rate capability. The molecular structure alteration during the lithium-coupled electron transfer reaction enables strong pi-pi interaction between the molecule and carbon, providing insights into designing a new class of organic electrode materials.
We unveil that the conformational change of a single organic molecule during the redox reaction leads to impressive battery performance for the first time. We propose the model material, a phenoxazin-3-one derivative, as a new redox-active bioinspired single molecule for the Li-ion rechargeable battery. The phenoxazin-3-one cathode delivered a high discharge capacity (298 mAh g(-1)) and fast rate capability (65% capacity retention at 10 C). We elaborate the redox mechanism and reaction pathway of phenoxazin-3-one during Li+-coupled redox reaction. The molecular structure alteration of phenoxazin-3-one during the lithium-coupled electron transfer reaction enables strong pi-pi interaction between 2Li-phenoxazin-3-one and carbon, which was evidenced by operando Raman spectroscopy and density functional theory calculation. Our work provides in-depth understanding about the conformational molecular switch of the single molecule during Li+-coupled redox reaction and insight into the design of a new class of organic electrode materials.
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