High performance carbon-coated lithium zinc titanate as an anode material for lithium-ion batteries

作者：Wang, Lijuan^*; Chen, Baokuan; Meng, Zhaohui; Luo, Baomin; Wang, Xiaojie; Zhao, Yingying

来源：Electrochimica Acta, 2016, 188: 135-144.

DOI：10.1016/j.electacta.2015.11.124

• Lithium zinc titanate
• Anode material
• beta-cyclodextrin
• Lithium-ion batteries

Carbon -coated Li2ZnTi3O8 (Li2ZnTi3O8/C) anodes have been successfully synthesized using beta-cyclodextrin (beta-CD) as the carbon source. The effects of carbon content on the structures and physicochemical properties of the Li2ZnTi3O8/C materials are also studied in detail. It is found that the Li2ZnTi3O8 particles are nano-sized and well disperse into the carbon networks. The carbon coating greatly enhances the electrochemical performance of Li2ZnTi3O8. Li2ZnTi3O8/C-2 with the carbon content of 6.85% shows large specific capacities and good cyclic performance at high current densities. The largest capacities of 169.1, 162.4 and 1503 mAh g(-1) are delivered at 3, 4 and 5 A g(-1), respectively. Cycling for 100 cycles, 160.5, 139.7 and 129.1 mAh g(-1) are kept for the sample at the three current densities mentioned above, respectively. The good electrochemical performance of the Li2ZnTi3O8/C-2 can be attributed to the good crystallinity, proper carbon content, large pore size, small particle size and low charge-transfer resistance.

• 出版日期2016-1-10
• 单位南阳师范学院