文献类型：期刊文献

英文题名：Superlithiation Performance of Covalent Triazine Frameworks as Anodes in Lithium-Ion Batteries

作者：Jiang, Fei[1];Wang, Yeji[2];Qiu, Tianpei[2];Zhang, Yi[2];Zhu, Weijie[2];Yang, Chaofan[2];Huang, Junjie[2];Fang, Zebo[1];Dai, Guoliang[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]Suzhou Univ Sci & Technol, Sch Chem Biol & Mat Engn, Suzhou 215009, Peoples R China

年份：2021

卷号：13

期号：41

起止页码：48818

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：SCI-EXPANDED(收录号：WOS:000710924900047)、、EI(收录号：20214311081896)、Scopus(收录号：2-s2.0-85117816986)、WOS

基金：This work is supported by the National Natural Science Foundation of China (21875142, 51872186, and 21203135) and the Computing Center for Fudan University and Compute Canada are thanked for computer time.

语种：英文

外文关键词：covalent triazine frameworks; aromatic rings; superlithiation; anode; lithium-ion battery

外文摘要：Organics with the merit of renewability have been viewed as the promising alternative of inorganic electrode materials in lithium-ion batteries, but most of them display inferior performance due to the sluggish ion/electron diffusion and the potential dissolution in aprotic electrolytes. Here, covalent triazine frameworks (CTFs-1), full of vertical pores and layered spaces for Li+ transfer, have been synthesized with p-dicyanobenzene as the monomer by a facile two-step method including a prepolymerization with CF3SO3H as the catalyst and deep polymerization in molten ZnCl2. CTFs-1-400, obtained at the deep polymerization temperature of 400 degrees C, exhibits the superlithiation property with the specific capacities of 1626 mA h g(-1) at 25 degrees C and 1913 mA h g(-1) at 45 degrees C at 100 mA g(-1), indicating the formation of Li6C6/Li6C3N3 in the reduction process. Electrochemical analysis and density functional theory calculation indicate that the ultrahigh capacity is mainly contributed by the capacitance of micropores and the redox capacity of benzene and triazine rings. Moreover, CTFs-1-400 displays the specific capacity of 740 mA h g(-1) for 1000 cycles at 1 A g(-1) with almost no capacity fading.