隨著高效能儲能裝置需求日益增加，開發兼具高容量及優異循環穩定性之鋰離子電池負極材料已成為重要研究方向；此外，利用生質資源製備碳材料亦符合綠色能源與環境永續之發展趨勢。本研究分為兩部分，第一部分以黃豆渣為碳源，經KOH活化後製備生質碳材(SAC)，再利用水熱法將不同含量之MoO2負載於SAC表面，製備MoO2(X)@SAC複合材料。第二部分則以熱縮合法製備石墨氮化碳(g-C3N4)，並透過水熱法負載Mn3O4奈米顆粒，製備Mn3O4(X)@g-C3N4複合材料。 研究結果顯示，適量金屬氧化物之導入可有效提升材料之電子傳輸能力與鋰離子儲存能力。其中，MoO2(60)@SAC展現最佳電化學性能，在1 A g-1電流密度下循環500圈後仍可維持333.1 mAh g-1之電容量，於0.1 A g-1電流密度下循環200圈後可達787.3 mAh g-1之電容量；而Mn3O4(72.5)@g-C3N4在1 A g-1電流密度下循環500圈後仍可維持211.5 mAh g-1之電容量，於0.1 A g-1電流密度下循環150圈後可達438.4 mAh g-1之電容量。綜合研究結果可知，透過碳基材料與過渡金屬氧化物之複合設計，可有效改善電極材料之電化學性能，並展現其作為高性能鋰離子電池負極材料之應用潛力。;With the increasing demand for high-performance energy storage devices， the development of lithium-ion battery anode materials with high capacity and excellent cycling stability has become an important research topic. In addition， the utilization of biomass resources for the preparation of carbon materials has attracted considerable attention due to its compatibility with green energy development and environmental sustainability. This study consists of two parts. In the first part， soybean residue-derived activated carbon (SAC) was prepared through KOH activation， followed by a hydrothermal process to load different amounts of MoO2 onto the SAC surface， yielding MoO2(X)@SAC composites. In the second part， graphitic carbon nitride (g-C3N4) was synthesized by thermal polymerization， and Mn3O4 nanoparticles were subsequently loaded onto the g-C3N4 surface through a hydrothermal process to prepare Mn3O4(X)@g-C3N4 composites. The results indicate that the incorporation of an appropriate amount of metal oxides effectively enhances electron transport and lithium-ion storage capability. Among the MoO2(X)@SAC composites， MoO2(60)@SAC exhibited the best electrochemical performance， delivering a capacity of 333.1 mAh g-1 after 500 cycles at a current density of 1 A g-1 and a capacity of 787.3 mAh g-1 after 200 cycles at 0.1 A g-1. For the Mn3O4(X)@g-C3N4 composites， Mn3O4(72.5)@g-C3N4 demonstrated the optimal electrochemical performance， maintaining a capacity of 211.5 mAh g-1 after 500 cycles at 1 A g-1 and delivering a capacity of 438.4 mAh g-1 after 150 cycles at 0.1 A g-1. Overall， the results demonstrate that the composite design of carbon-based materials and transition metal oxides can effectively improve the electrochemical performance of electrode materials. The developed MoO2(60)@SAC and Mn3O4(72.5)@g-C3N4 composites demonstrate considerable potential as high-performance anode materials for lithium-ion batteries.
