Novel DNA-Based Polymer Solid Electrolytes for Lithium-Ion Batteries

Abstract

Solid electrolytes are becoming increasingly popular due to their safety [1], and the application of organic biomolecules in electrochemical devices is also an important strategy for sustainable development [2]. Recently, we have studied the application of DNA in electrochemical energy storage devices [3]. A novel PVDF@DNA solid polymer electrolyte was designed in this work, we studied the effect of different DNA addition amounts on polymer solid electrolytes. DNA as a plasticizer-like additive, reduces the crystallinity of the polymer solid electrolyte and improves its ionic conductivity [4]. At the same time, due to the Lewis acid effect of DNA, it can promote the dissociation of lithium salt when interacting with lithium salt anions, and it can also fix the anions, causing more free lithium ions in the electrolyte, thus improving its ionic conductivity. The polymer solid electrolyte with DNA shows relatively better performance. Hence, the DNA-based polymer solid electrolyte fabricated in this study has substantial potential for application in LSBs.AcknowledgementThis work was supported by the National Research Foundation of Korea (NRF-2021R1A2C1008272). This work was supported by Ministry of Trade, Industry and Energy, KEIT, under the project title "International standard development of evaluation methods for nano-carbon-based high-performance supercapacitors for electric vehicles" (project # 20016144).