Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University , Jinan 250061, P.R. China.
ACS Appl Mater Interfaces. 2017 Apr 12;9(14):12400-12407. doi: 10.1021/acsami.6b16699. Epub 2017 Mar 30.
Ultrafine TiO confined in porous-nitrogen-doped carbon is synthesized from a single metal-organic framework precursor. As a novel interlayer for lithium-sulfur batteries, the TiO@NC composite can act as both a high efficiency lithium polysulfide barrier to suppress the side reactions and an additional current collector to enhance the polysulfide redox reactions. The lithium-sulfur battery with a TiO@NC interlayer delivers a high reversible capacity of 1460 mAh g at 0.2 C and capacity retention of 71% even after 500 cycles with high rate capability.
从单一的金属有机骨架前体制备出了限域在多孔氮掺杂碳中的超精细 TiO。作为一种新型的锂硫电池夹层，TiO@NC 复合材料既可以作为高效的锂多硫化物阻挡层以抑制副反应，又可以作为额外的集流体来增强多硫化物的氧化还原反应。具有 TiO@NC 夹层的锂硫电池在 0.2 C 时具有 1460 mAh g 的高可逆容量，并且在 500 次循环后具有 71%的容量保持率，同时还具有高倍率性能。
