Cu_(2)O@Ti_(3)C_(2)T_(x)锂离子电池负极材料制备及电化学性能

Preparation and lithium storage properties of Cu_(2)O@Ti_(3)C_(2)T_(x) anode materials for lithium ion battery

Cu_(2)O是锂离子电池(LIB)低成本、高容量的负极材料之一,但面临结构不稳定、容量保持率低的挑战.通过简单的溶剂热和湿化学法制备了具有三明治结构的Cu_(2)O@Ti_(3)C_(2)T_(x).凭借其优点,Cu_(2)O@Ti_(3)C_(2)T_(x)复合材料在2 A·g-1的电流密度下循环400圈后仍保持416.8 mA·h·g-1的容量.与纯Cu_(2)O相比,这种复合材料的电化学性能得到了提升,这得益于少层Ti_(3)C_(2)T_(x)的优异导电性和三明治结构对离子传输的促进作用.

Cu_(2)O is one of the low-cost and high-capacity anode materials for lithium ion batteries(LIBs),but faces the challenges of structural instability and poor capacity retention.Cu_(2)O@Ti_(3)C_(2)T_(x) with sandwich structure was prepared through a facile solvothermal and wet-chemical method.By virtue of these merits,the Cu_(2)O@Ti_(3)C_(2)T_(x) composite retains a capacity of 416.8 mA·h·g-1 at 2 A·g-1 after 400 cycles.Compared with pristine Cu_(2)O,the electrochemical performance has improved which is resulted from the excellent conductivity of few-layer Ti_(3)C_(2)T_(x) and facilitated ion transport by the sandwich structure.