文献类型：期刊文献

英文题名：Synthesis of biphenyl-linked covalent triazine frameworks with excellent lithium storage performance as anode in lithium ion battery

作者：Jiang, Fei[1];Wang, Yeji[2];Qiu, Tianpei[2];Yang, Gege[2];Yang, Chaofan[2];Huang, Junjie[2];Fang, Zebo[1];Li, Jun[3]

机构：[1]Shaoxing Univ, Math Informat Coll, Shaoxing 312000, Peoples R China;[2]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[3]Sun Yat Sen Univ, Sch Intelligent Syst Engn, Shenzhen 518000, Peoples R China

年份：2022

卷号：523

外文期刊名：JOURNAL OF POWER SOURCES

收录：SCI-EXPANDED(收录号：WOS:000779266000003)、、EI(收录号：20220411507870)、Scopus(收录号：2-s2.0-85123207673)、WOS

基金：Acknowledgements This work was supported by the National Natural Science Founda-tions of China (21875142, 51872186) , the Key-Area Research and Development Program of Guangdong Province (2020B090920001) .

语种：英文

外文关键词：Biphenyl; Covalent triazine frameworks; Molecular pore; High reversible capacity; Lithium ion battery

外文摘要：Covalent triazine frameworks (CTFs) with rigid triazine linkages and rich molecular pores are viewed as the promising electrode materials, which have the great possibility to tackle the issues including poor structural stability, sluggish ion/electron diffusion and low capacity of conventional organics. In this study, the biphenyl based CTFs (CTF-2) has been synthesized and proposed as lithium storage material for the first time. Notably, a superlithiation performance is achieved in CTF-2 with almost 4.4 Li+ storage in each aromatic ring (benzene or triazine ring), delivering a capacity of 1527 mAh g(-1)& nbsp;at 0.1 A g(-1). As found in In-situ Fourier Transform infrared spectra (FTIR), the superlithiation of CTF-2 is mainly contributed by the reversible transfer of electrons in aromatic rings, which results in the reversible variations in the peak intensity during the charge/discharge process. Furthermore, CTF-2 exhibits an admirable cycling stability with the capacity of 1321 mAh g(-1)& nbsp;over 500 cycles at 1 A g(-1), and a superior rate capability with the capacity of 463 mAh g(-1) at 10 A g(-1). The prominent electrochemical performance can be owned to the structural stability, porous structures and the rich electrochemical active sites of CTF-2.