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129th General Meeting of Korean Chemical Society & Exposition Vat dyes as a cost-effective organic cathode material for sustainable secondary batteries

Submission Date :
2 / 28 / 2022 , 15 : 52 : 10
Abstract Number :
129022828048
Presenting Type:
Poster Presentation
Presenting Area :
Electrochemistry
Authors :
Jinyoung Lee, Jong-Jin Park, Ji Eon Kwon*
Functional Composite Materials Research Center, Korea Institute of Science and Technology, Korea
Assigned Code :
ELEC.P-714 Assigend Code Guideline
Presenting Time :
April 15 (FRI) 11:00~13:00
As the demand for wearable and mobile electronic devices has recently increased, rechargeable lithium-ion batteries (LIBs) have gained tremendous interests. However, since conventional electrode materials in LIBs are obtained through mining, a lack and an uneven geometric distribution of the resources have steeply raised their price. Therefore, it is essential to develop new electrode materials consisting of more abundant elements for next-generation batteries. Here, we report Vat Blue (VB) dyes as a low-cost organic cathode material in batteries. Because the VBs bearing redox-active conjugated carbonyl groups have already been commercialized in dyeing applications, it also has the great potential for a low-cost electrode material. To improve processability of VBs, we introduced thermally cleavable tert-butyloxycarbonyl (t-BOC) groups. In the electrode fabrication process, highly soluble t-Boc-VBs formed homogeneous films with conductive carbon additives and PVDF binder. Subsequently, the drying process spontaneously removed the t-Boc group from the VB molecules to form insoluble active materials in the electrode. Due to low solubility, the electrode showed stable cyclability in coin cells.