Green sustainable nitrogen self-doped porous carbon anode material for the use in lithium ion batteries was successfully obtained from chitosan (CS) / cellulose nanocrystal (CNC) biocomposites by facile one step casting-carbonization process. Three main factors–the carbonization temperature, the interfacial compatibility, and the N-doping content—synergistically affected the electrochemical performance of the CS/CNC porous carbon anode. High N-doping content and moderate interfacial compatibility between CS and CNC played a more crucial role in samples' electrochemical performance at the low temperature (800°C) and at the high temperature (1500°C), respectively. The pyrolyzed carbon tended toward stability after the temperature reached 1200°C, corresponding to the more stable cycling performance and higher Coulombic efficiency of the electrodes. Incorporation of CNC effectively promoted the rate retention and cycling stability. The CS/CNC-1200-10 electrode with moderate interfacial bonding, relatively high specific surface area, C/N ratio as well as the reasonable multiscale pore distribution including abundant micropores and a few mesopores and macropores showed a good average specific capacity (333 mAh g⁻¹) at 100 mA g⁻¹, retention capacity (251 mAh g⁻¹) at 2000 mA g⁻¹, as well as an excellent cycling stability (327 mAh g⁻¹) after 50 cycles.

通过壳聚糖（CS）/纤维素纳米晶体（CNC）生物复合材料的一步浇铸-碳化工艺成功地获得了用于锂离子电池的绿色可持续氮自掺杂多孔碳阳极材料。碳化温度，界面相容性和N掺杂含量这三个主要因素协同影响CS / CNC多孔碳阳极的电化学性能。CS和CNC之间的高N掺杂含量和适度的界面相容性在低温下样品的电化学性能中起着至关重要的作用（800°C）和高温（1500°C）。温度达到1200℃后，热解碳趋于稳定°C，对应于更稳定的循环性能和更高的库仑效率。加入CNC可以有效地提高速率保持率和循环稳定性。CS / CNC-1200-10电极具有适度的界面结合，相对较高的比表面积，C / N比以及合理的多尺度孔分布，包括丰富的微孔以及少量中孔和大孔，显示出良好的平均比容量（333 mAh）克^-1）在100mA克^-1，保留容量（251毫安克^-1）在2000毫安克^-1，以及优异的循环稳定性（327毫安克^-1 50次循环后）。