Facile synthesis of hollow Ti2Nb10O29 microspheres for high-rate anode of Li-ion batteries

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（6）
• 页码范围: 670-676
• 页数: 7页
• 语种: 英文

摘要

Titanium niobium oxides emerge as promising anode materials with potential for applications in lithium ion batteries with high safety and high energy density.However, the innate low electronic conductivity of such a composite oxide seriously limits its practical capacity, which becomes a serious concern especially when a high rate charge/discharge capability is expected.Here, using a modified template-assisted synthesis protocol, which features an in-situ entrapment of both titanium and niobium species during the formation of polymeric microsphere followed by a pyrolysis process, we succeed in preparing hollow microspheres of titanium niobium oxide with high efficiency in structural control.When used as an anode material, the structurally-controlled hollow sample delivers high reversible capacity (103.7 m A h g-1 at 50 C) and extraordinary cycling capability especially at high charge/discharge currents (164.7 m A h g-1 after 500 cycles at 10 C) .