A three-dimensional (3D) flower-shaped Li₄Ti₅O₁₂-graphene (Gr) hybrid micro/nanostructures and pine needles derived carbon nanopores (PNDCN) has been prepared by using the effective hydrothermal process. Due to the unique micro/nanostructures which can provide abundant surface active sites, the obtained 3D Li₄Ti₅O₁₂-Gr displays a high specific capacitance of 706.52 F g⁻¹ at 1 A g⁻¹. The prepared PNDCN also exhibits high specific capacitance of 314.50 F g⁻¹ at 1 A g⁻¹ benefiting from its interconnected honeycomb-like hierarchical and open structure, which facilitates the diffusion and reaction of electrolyte ions and enables an isotropic charging/discharging process. An asymmetric supercapacitor utilizing Li₄Ti₅O₁₂-Gr as positive electrode and PNDCN as negative electrode has been fabricated, it delivers a high energy density of 35.06 Wh kg⁻¹ at power density of 800.08 W kg⁻¹ and outstanding cycling stability with 90.18% capacitance retention after 2000 cycles. The fabrication process presented in this work is facile, cost-effective, and environmentally benign, offering a feasible solution for manufacturing next-generation high-performance energy storage devices.

利用有效的水热法制备了三维（3D）花状Li ₄ Ti ₅ O _12-石墨烯（Gr）杂化微/纳米结构和松针衍生的碳纳米孔（PNDCN）。由于可以提供丰富的表面活性部位的独特的微/纳米结构，所获得的3D Li ₄ Ti ₅ O ₁₂ -Gr在1 A g ^-1下显示出706.52 F g ^-1的高比电容。所制备的PNDCN在1 A g ^-1时还表现出314.50 F g ^-1的高比电容得益于其相互连接的蜂窝状分层和开放结构，该结构可促进电解质离子的扩散和反应，并实现各向同性的充电/放电过程。制备了以Li ₄ Ti ₅ O ₁₂ -Gr为正极，PNDCN为负极的不对称超级电容器，它以800.08 W kg ^-1的功率密度提供35.06 Wh kg ^-1的高能量密度，并具有出色的循环稳定性。 2000次循环后，电容保持率为90.18％。这项工作中提出的制造过程简便，经济高效且环保，为制造下一代高性能储能设备提供了可行的解决方案。