文献类型：期刊文献

英文题名：Suppressing Lignin Self-Condensation Enables Microstructure Engineering of Bamboo Derived Hard Carbon for High Performance Sodium-Ion Batteries

作者：Liao, Zhishan Lin, Jianhao Li, Tianyi Liu, Yike Xiong, Xunhui

第一作者：Liao, Zhishan

通信作者：Xiong, XH[1]

机构：[1]South China Univ Technol, Sch Environm & Energy, Guangzhou, Peoples R China;[2]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang, Peoples R China

第一机构：South China Univ Technol, Sch Environm & Energy, Guangzhou, Peoples R China

通信机构：corresponding author), South China Univ Technol, Sch Environm & Energy, Guangzhou, Peoples R China.

年份：2025

外文期刊名：SMALL

收录：;EI(收录号：20255219796470);Scopus(收录号：2-s2.0-105025583330);WOS:【SCI-EXPANDED(收录号:WOS:001642345800001)】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (52322406, 52264035) and the Natural Science Foundation of Guangdong Province, China (2024A1515010827).

语种：英文

外文关键词：hard carbon; lignin; microstructure engineering; self-condensation; sodium-ion batteries

摘要：The delignification pretreatments of lignocellulosic biomass have been regarded as the most efficient strategy to enhance the electrochemical performances of as-derived hard carbon anode for sodium-ion batteries. However, the lack understanding of delignification mechanism as well as the overlooked self-condensation of lignin during pretreatment has greatly impeded precise microstructural engineering of hard carbon. Herein, a phenol-assisted hydrothermal pretreatment has been proposed as a new and facile strategy to control the content of lignin in bamboo precursor. It has been demonstrated that the addition of phenol in hydrothermal pretreatment can suppress self-condensation of lignin and enable efficient removal of recalcitrant lignin in bamboo powder. As a result, the as-prepared hard carbon possesses abundant closed pores, expanded interlayer spacing, and increased carbonyl functional groups. When evaluated as an anode for sodium ion battery, the hard carbon can deliver a high reversible capacity of 347.3 mAh g-1 at 0.1 C, excellent rate performance of 235 mAh g-1 at 6 C and superior cycle stability with a capacity retention of 93.97% after 2000 cycles at 2 C. This work not only unravels the mechanisms of efficient delignification at molecular level but also proposes a novel strategy to produce high-performance hard carbon from lignocellulosic biomass.