Ag enhanced electrochemical performance for Na2Li2Ti6O14 anode in rechargeable lithium-ion batteries

作者：Qian, Shangshu; Yu, Haoxiang; Yan, Lei; Li, Peng; Lin, Xiaoting; Bai, Ying^*; Wang, Songjing; Long, Nengbing; Shui, Miao; Shu, Jie^*

来源：Ceramics International, 2016, 42(6): 6874-6882.

DOI：10.1016/j.ceramint.2016.01.071

• Na2Li2Ti6O14
• Ag coating
• Anode material
• Rate property
• Lithium-ion batteries

Due to the characteristics of an electronic insulator, Na2Li2Ti6O14 always suffers from low electronic conductivity as anode material for lithium storage. Via Ag coating, Na2Li2Ti6O14@Ag is fabricated, which has higher electronic conductivity than bare Na2Li2Ti6O14. Enhancing the Ag coating content from 0.0 to 10.0 wt%, the surface of Na2Li2Ti6O14 is gradually deposited by Ag nanoparticles. At 6.0 wt%, a continuous Ag conductive layer is formed on Na2Li2Ti6O14. While, particle growth and aggregation take place when the Ag coating content reaches 10.0 wt%. As a result, Na2Li2Ti6O14@6.0 wt% Ag displays better cycle and rate properties than other samples. It can deliver a lithium storage capacity of 131.4 mAh g(-1) at 100 mA g(-1), 124.9 mAh g(-1) at 150 mA g(-1), 119.1 mAh g(-1) at 200 mA g(-1), 115.8 mAh g(-1) at 250 mA g(-1), 111.9 mAh g(-1) at 300 mA g(-1) and 109.4 mAh g(-1) at 350 mA g(-1), respectively.

• 出版日期2016-5-1
• 单位河南大学; 宁波大学