Double diamond structured bicontinuous mesoporous titania templated by a block copolymer for anode material of lithium-ion battery

• 作者: Qingqing Sheng Qian Li Luoxing Xiang Tao Huang Yiyong Mai Lu Han
• 来源期刊: 纳米研究（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Research Articles
• 页码范围: 992-997
• 页数: 6页
• 语种: 英文

摘要

Titania has received considerable attention as a promising anode material of LHon battery (LIB).Controlling the structure and morphology of titania nanostructures is crucial to govern their performance.Herein,we report a mosoporous 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 HCI/water.The structure shows tetragonal symmetry (space group/41/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 bicontnuous 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.