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Reversible intercalation and exfoliation of layered covalent triazine frameworks for enhanced lithium ion storage
- Zhu, Yuanzhi, Chen, Xifan, Cao, Yaqi, Peng, Wenchao, Li, Yang, Zhang, GuoLiang, Zhang, Fengbao, Fan, Xiaobin
- Chemical communications 2019 v.55 no.10 pp. 1434-1437
- anodes, capacitance, chemical communication, chemical reactions, ions, lithium, nanosheets, triazines
- We report that layered covalent triazine frameworks (CTF-1) can be rapidly and reversibly intercalated with either an oxidizing or a non-oxidizing acid based on the acid–base driven mechanism. The obtained CTF-1 intercalated compounds can be readily reacted with nitronium ions and spontaneously exfoliated into 1–2 layered functionalized CTF-1 nanosheets (f-CTF-1) with a high yield of 42%. The f-CTF-1 shows a 2.5 to 3.8 times increase in specific capacitance and much better rate performance when used as an LIB anode.