Auto-adjustment of structure and SnO2 content of SnO2/TiO2 microspheres for lithium-ion batteries

作者：Jiang, Juhui; Liu, Shengnan; Wang, Yuanyuan; Liu, Yang; Fan, Jing^*; Lou, Xiangdong; Wang, Xiaobing^*; Zhang, Hua; Yang, Lin

来源：Chemical Engineering Journal, 2019, 359: 746-754.

DOI：10.1016/j.cej.2018.11.190

• SnO2/TiO2 composites
• Multishell microsphere
• Solvothermal
• Auto-adjustment
• Lithium-ion batteries

The optimization strategies of nanoarchitectures with rational composition are important for improving the properties of composites, but which are complicated and challenging. Herein, we demonstrate a facile optimization method for auto-adjusting the SnO2 content and structure of SnO2/TiO2 multishell microspheres (SnO2/TiO2-MMs). Especially, the redundant SnO2 could be automatically removed from the TiO2 framework when the molar percentage of Sn to Ti reaches to 80.5%, resulting in that the element percentage and structure of SnO2/TiO2-MMs could be simultaneous optimized. Through optimizing, the reversible discharge capacity and cycle life of SnO2/TiO2-MMs can be significantly improved in lithium ion batteries. The reversible discharge capacity of SnO2/TiO2-MMs delivers the 1045 mAh g(-1) after 650 cycles at the current rate of 0.1 A g(-1). Even at the current rate of 0.2 A g(-1), the capacity of 591 mAh g(-1) can also be delivered after 2000 cycles. This may provide a new strategy or optimized method for building the rational multishell nanoarchitectures of composites.

• 出版日期2019-3-1
• 单位河南师范大学