文献类型：期刊文献

英文题名：Unraveling the Microcrystalline Carbon Evolution Mechanism of Biomass-Derived Hard Carbon for Sodium-Ion Batteries

作者：Zhang, Gaoyue[1,2,3] Chen, Chao[2] Xu, Chenchen[2] Li, Junxiao[2] Ye, Hualin[3] Wang, Ao[2] Cao, Xin[3] Sun, Kang[2] Jiang, Jianchun[1,2]

第一作者：Zhang, Gaoyue

通信作者：Jiang, JC[1];Sun, K[2];Jiang, JC[2];Cao, X[3]

机构：[1]Southeast Univ, Sch Energy & Environm, Nanjing 210096, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[3]Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Sch Chem & Mat Sci, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Peoples R China

年份：2024

卷号：38

期号：9

起止页码：8326-8336

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20241715949574);Scopus(收录号：2-s2.0-85190735420);WOS:【SCI-EXPANDED(收录号:WOS:001203975500001)】；

基金：This research was supported by the National Key R&D Program (2022YFB4201904), the Forestry Technology Projects of Zhejiang Province (2023SY04), the Natural Science Foundation of Jiangsu Province (BK20230376), the National Natural Science Foundation of China (22309085 and 22309087), and the Jiangsu Provincial Department of Education (23KJB150019 and 23KJB150018).

语种：英文

外文关键词：Biomass - Carbon - Cellulose - Metal ions - Pyrolysis - Sodium-ion batteries

摘要：Microcrystalline carbon is the essential constituent unit that constitutes the hard carbon material for sodium-ion batteries. However, the evolution mechanism of microcrystalline carbon remains controversial, on account of the diversity of biomass composition. Here, we conducted a systematic study of the evolutionary mechanism of microcrystalline carbon using lignin and cellulose as models. It was found that lignin is more readily converted into microcrystalline carbon structures than cellulose. Owing to the differences in pyrolysis processes, lignin-derived microcrystalline carbon exhibits isotropic arrangement properties and evolves into long-range ordered graphite-like structures with increasing pyrolysis temperatures. In contrast, the anisotropic arrangement of cellulose-derived microcrystalline carbon allows them to maintain long-range disordered structures under high-temperature pyrolysis. Upon further analysis using four forestry biomass wastes with different compositional ratios to prepare hard carbon, we found that proper ratios of lignin and cellulose ensure a sufficient amount of microcrystalline carbon while avoiding overgrowth of microcrystalline carbon, where the tightness of the microcrystalline carbon stacking structure was positively correlated with lignin content. Besides, coconut-shell-derived hard carbon has a long-range disordered and short-range ordered microcrystalline stacking structure and exhibits a high capacity of 329.3 mAh g-1.