文献类型：期刊文献

英文题名：Modulation of Phenolic Resin Structure by Oxidized Lignin for the Preparation of High-Performance Hard Carbon Anodes

作者：Xu, Chenchen[1,2] Jiang, Jianchun[1,3] Wang, Ao[1] Sun, Kang[1] Zhang, Gaoyue[1,3]

第一作者：Xu, Chenchen

机构：[1] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Lab. for Biomass Chemical Utilization, Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing, 210042, China; [2] Nanjing Forestry University, Jiangsu Collaborative Innovation Centre for Efficient Processing, Utilization of Forest Resources, Jiangsu, Nanjing, 210037, China; [3] School of Energy and Environment, Southeast University, Jiangsu, Nanjing, 210096, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240131954)

语种：英文

外文关键词：Anodes - Carbon - Chemical bonds - Efficiency - Metal ions - Microporosity - Oxidation - Phenolic resins - Resins - Sodium-ion batteries

摘要：Phenolic resins are considered a highly promising source of hard carbon for sodium-ion batteries (SIB) because of their high carbon content and exceptional electrochemical characteristics. Phenolic resin-based hard carbon has consistently faced challenges such as low initial coulombic efficiency, restricted cycle performance, and significant toxicity. To bypass these issues, we produced hard carbon precursor materials by adding lignin into phenolic resins. Lignin is comprised of phenylpropane monomers, which can be co-polymerized with phenolic resins through chemical bonding to build a carbon skeleton structure with high oxygen content, thus changing the carbon microcrystalline structure of hard carbon and enhancing its sodium storage capabilities. However, lignin has a complicated molecular structure and can be condensed with aldehyde resins with little reactivity. Therefore, the chemical structure of lignin phenolic resin was modified with oxidized lignin at ambient temperature and pressure to obtain the augmentation of sodium storage capabilities of phenolic resin-based hard carbon. The phenolic resin-based hard carbon, modified by lignin oxidation, exhibited increased interlayer spacing, decreased specific surface area, and enhanced micropore quantity. These changes are crucial for improving the sodium electrical properties of the hard carbon material. The Phenolic resin-based hard carbon achieved a higher capacity of 356 mAh·g-1 with an initial coulombic efficiency (ICE) of 82%. It retained 80% of its capacity after 4000 cycles, surpassing the unaltered sample. Consequently, oxidized lignin phenolic resin hard carbon anode materials with the highest overall performance were successfully manufactured. ? 2024, The Authors. All rights reserved.