Shang Hong, Zhou Yougui, Li Huipeng, Peng Jia, Hao Xinmeng, Guo Lihua, Sun Bing
School of Science, China University of Geosciences (Beijing), Beijing 100083, China.
Nanomaterials (Basel). 2025 Sep 3;15(17):1357. doi: 10.3390/nano15171357.
Biomass resources are excellent candidates for carbon electrode materials due to their abundance, renewability, and biodegradability. Herein, the solanaceous crop , a rich agricultural by-product, was utilized to prepare biomass-derived carbon material (TsC) and applied as an anode in lithium-ion batteries (LIBs). Doping or composite formation is considered to enhance the electrochemical performance. Doping extra nitrogen (N) atoms into the TsC (denoted as TsNC) demonstrated exceptional reversible specific capacity (475.9 mA h g at the current density of 60 mA g after 500 cycles) and remarkable long-term cycling stability (142.9 mA h g even at a high current density of 1.5 A g after 1000 cycles, much larger than that of TsC), attributed to the increased lithium-ion (Li-ion) adsorption sites including graphitic-N, pyrrolic-N, and pyridinic-N. Furthermore, kinetic analysis revealed that a prominent predominant surface capacitive-controlled behavior was responsible for the superior rate performance of TsNC, which could facilitate rapid charging and discharging at high rates. This work offers valuable insights into the application and modification of nitrogen-doped biomass-derived carbons with outstanding electrochemical properties for LIBs. The strategy also sheds light on enabling waste recycling and generating economic benefits.
生物质资源因其丰富性、可再生性和生物降解性，是碳电极材料的理想候选者。在此，利用茄科作物这种丰富的农业副产品制备生物质衍生碳材料（TsC），并将其用作锂离子电池（LIBs）的阳极。人们认为掺杂或形成复合材料可提高电化学性能。在TsC中掺杂额外的氮（N）原子（表示为TsNC）表现出优异的可逆比容量（在500次循环后，电流密度为60 mA g时为475.9 mA h g）和显著的长期循环稳定性（在1000次循环后，即使在1.5 A g的高电流密度下仍为142.9 mA h g，远大于TsC），这归因于锂离子（Li-ion）吸附位点的增加，包括石墨氮、吡咯氮和吡啶氮。此外，动力学分析表明，显著的主要表面电容控制行为是TsNC优异倍率性能的原因，这有助于在高倍率下快速充电和放电。这项工作为具有优异电化学性能的氮掺杂生物质衍生碳在LIBs中的应用和改性提供了有价值的见解。该策略也为实现废物回收和产生经济效益提供了思路。
