Titania has received considerable attention as a promising anode material of Li-ion battery (LIB). Controlling the structure and morphology of titania nanostructures is crucial to govern their performance. Herein, we report a mesoporous titania scaffold with a bicontinuous shifted double diamond (SDD) structure for anode material of LIB. The titania scaffold was synthesized by the cooperative self-assembly of a block copolymer poly(ethylene oxide)-block-polystyrene template and titanium diisopropoxide bis(acetylacetonate) as the inorganic precursor in a mixture solvent of tetrahydrofuran and HCl/water. The structure shows tetragonal symmetry (space group I4₁/amd) comprising two sets of diamond networks adjoining each other with the unit cell parameter of a = 90 nm and c = 127 nm, which affords the porous titania a specific surface area (SSA) of 42 m²·g⁻¹ with a mean pore diameter of 38 nm. Serving as an anode material of LIB, the bicontinuous titania scaffold exhibits a high specific capacity of 254 mAh·g⁻¹ at the current density of 1 A·g⁻¹ and an alluring self-improving feature upon charge/discharge over 1,000 cycles. This study overcomes the difficulty in building up ordered bicontinuous functional materials and demonstrates their potential in energy storage application.

二氧化钛作为锂离子电池（LIB）的有希望的负极材料已受到相当多的关注。控制二氧化钛纳米结构的结构和形态对于控制其性能至关重要。本文中，我们报道了一种具有双连续移位双金刚石（SDD）结构的中孔二氧化钛支架，用于LIB阳极材料。通过在四氢呋喃和HCl /水的混合溶剂中，嵌段共聚物聚（环氧乙烷）-嵌段-聚苯乙烯模板和二异丙氧基钛双（乙酰丙酮酸酯）作为无机前体的协同自组装，合成二氧化钛支架。该结构显示四方对称性（空间群I 4 ₁ / amd）包含两组相互邻接的钻石网络，其晶胞参数为a = 90 nm和c = 127 nm，这为多孔二氧化钛提供了42 m ² ·g ^-1的比表面积（SSA），且平均孔径直径为38 nm。作为LIB的负极材料，双连续二氧化钛支架在1 A·g ^-1的电流密度下显示出254 mAh·g ^-1的高比容量，并且在经过1000次循环充电/放电后具有引人入胜的自我改进功能。这项研究克服了构建有序双连续功能材料的困难，并展示了它们在储能应用中的潜力。