文献类型：期刊文献

英文题名：High nitrogen doped carbon nanofiber aerogels for sodium ion batteries: synergy of vacancy defects to boost sodium ion storage

作者：Lu, Yun[1,3] Li, Daohao[2] Lyu, Chunxiao[2] Liu, Hongli[2] Liu, Bo[1] Lyu, Shaoyi[1] Rosenau, Thomas[3] Yang, Dongjiang[2,4]

第一作者：卢芸;Lu, Yun

通信作者：Lu, Y[1];Yang, DJ[2];Rosenau, T[3]|[a000547dbdc9826482af5]卢芸;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Qingdao Univ, Sch Environm Sci & Engn, Collaborat Innovat Ctr Marine Biomass Fibers Mat, Qingdao 266071, Shandong, Peoples R China;[3]Vienna BOKU, Dept Chem Nat Resources & Life Sci, Div Chem Renewables, A-1190 Vienna, Austria;[4]Griffith Univ, QMNC, Brisbane, Qld 4111, Australia

年份：2019

卷号：496

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20193407353662);Scopus(收录号：2-s2.0-85071003700);WOS:【SCI-EXPANDED(收录号:WOS:000488957400047)】；

基金：This work was financially supported by The National Key Research and Development Program of China (2017YFD0600204) the National Natural Science Foundation of China (Grant Nos. 31870535, 51672143), Taishan Scholars Program, Outstanding Youth of Natural Science in Shan-dong Province (JQ201713), and ARC Discovery Project (No. 170103317). Dr. Yun Lu thanks the scholarship program of Ernst Mach Grant - Eurasia-Pacific Uninet. T.R. thanks the doctorate school ABM (Advanced Biorefineries: Chemistry & Materials) for financial support.

语种：英文

外文关键词：N-doped; Biomass nanofibers; SIBs; Defects; Na adsorption

摘要：The electrochemical performance of sodium ion batteries (SIBs) may be enhanced through improving current carbonaceous materials. These materials exhibit the inferior sodium storage performance due to the limited interlayer spacing and Na+ intercalation. We report an approach for preparing porous nitrogen-doped carbon nanofiber (20 nm diameter) aerogels with large-size defect structures and the high N content derived from chitin. When the aerogels were utilized as the anode material for SIBs, the sample showed the high reversible capacity of 282 mA h g(-1) at 0.1 A g(-1), the satisfactory rate capability of 175 mA h g(-1) at 5 A g(-1) and the super cycling stability (249 mA h g(-1) at 0.5 A g(-1) over 7000 cycles). According to the computation results of density functional theory (DFT), the optimally enhanced electrochemical performance of N-doped material for SIB anodes was ascribed to the synergistic effect of defect structures and N-doping, thus providing the theoretical basis of the complementary relationship between the improved sodium storage performance and structural defects in the carbon framework.