文献类型：期刊文献

英文题名：Lignin-derived carbon with pyridine N-B doping and a nanosandwich structure for high and stable lithium storage

作者：Wu, Dichao[1,2] Li, Jiayuan[1,2] Zhao, Yuying[1,2] Wang, Ao[1,7] Zhang, Gaoyue[3] Jiang, Jianchun[1] Fan, Mengmeng[2,8] Sun, Kang[1,4,5,6,7]

第一作者：Wu, Dichao

通信作者：Wang, A[1];Sun, K[1];Fan, MM[2]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat, Natl Engn Lab Biomass Chem Utilizat,Key & Open Lab, Nanjing, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing, Peoples R China;[3]Southeast Univ, Sch Energy & Environm, Nanjing, Peoples R China;[4]Tsinghua Univ, Dept Chem, Beijing, Peoples R China;[5]Huaqiao Univ, Acad Adv Carbon Convers Technol, Fujian Prov Key Lab Biomass Low Carbon Convers, Xiamen, Peoples R China;[6]Chinese Acad Sci, Xinjiang Lihua Inst Technol, Urumqi, Peoples R China;[7]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Key Lab Biomass Energy & Mat, Natl Engn Lab Biomass Chem Utilizat,SFA,Key & Open, Nanjing 210042, Jiangsu, Peoples R China;[8]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China

年份：2024

外文期刊名：CARBON ENERGY

收录：;EI(收录号：20241415839094);Scopus(收录号：2-s2.0-85189094073);WOS:【SCI-EXPANDED(收录号:WOS:001188991900001)】；

基金：This work was supported by the Foundation of Jiangsu Key Lab of Biomass Energy and Material (JSBEM-S-202101), the National Key R&D Program (2022YFB4201904), the National Natural Science Foundation of China (No. 51902162), the Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, the International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, and Merit-based funding for Nanjing Innovation and Technology Projects.

语种：英文

外文关键词：high cycling stability; high energy density; lithium-ion batteries; pyridinic N-B species; sandwich structure carbon nanosheet

摘要：Biomass-derived carbon is a promising electrode material in energy storage devices. However, how to improve its low capacity and stability, and slow diffusion kinetics during lithium storage remains a challenge. In this research, we propose a "self-assembly-template" method to prepare B, N codoped porous carbon (BN-C) with a nanosandwich structure and abundant pyridinic N-B species. The nanosandwich structure can increase powder density and cycle stability by constructing a stable solid electrolyte interphase film, shortening the Li+ diffusion pathway, and accommodating volume expansion during repeated charging/discharging. The abundant pyridinic N-B species can simultaneously promote the adsorption/desorption of Li+/PF6- and reduce the diffusion barrier. The BN-C electrode showed a high lithium-ion storage capacity of above 1140 mAh g-1 at 0.05 A g-1 and superior stability (96.5% retained after 2000 cycles). Moreover, owing to the synergistic effect of the nanosandwich structure and pyridinic N-B species, the assembled symmetrical BN-C//BN-C full cell shows a high energy density of 234.7 W h kg-1, high power density of 39.38 kW kg-1, and excellent cycling stability, superior to most of the other cells reported in the literature. As the density functional theory simulation demonstrated, pyridinic N-B shows enhanced adsorption activity for Li+ and PF6-, which promotes an increase in the capacity of the anode and cathode, respectively. Meanwhile, the relatively lower diffusion barrier of pyridinic N-B promotes Li+ migration, resulting in good rate performance. Therefore, this study provides a new approach for the synergistic modulation of a nanostructure and an active site simultaneously to fabricate the carbon electrode material in energy storage devices. B, N codoped porous carbon (BN-C) with a nanosandwich structure and abundant pyridinic N-B species was prepared using the "self-assembly-template" method. Owing to the synergistic effect of the nanostructure and pyridinic N-B sites, the assembled symmetrical BN-C//BN-C full cell shows high capacity and ultralong cycling stability, superior to most of the other cells reported in the literature. image