Self-templating thermolysis synthesis of Cu2-xS@ M （M = C, TiO2, MoS2） hollow spheres and their application in rechargeable lithium batteries  

出　　处：《Nano Research》2018年第2期831-844,共14页纳米研究（英文版）

摘　　要：Owing to their unique structural stability and impressive long-term cycling performance, coated hollow structures are highly attractive for energy storage systems, especially batteries. Many efforts have been devoted and various strategies have been proposed to prepare such materials. In the present work, we propose a self-templating thermolysis strateg different from traditional wet processing methods, to fabricate cuprous sulfide hollow spheres coated with different shells, by exploiting the thermal decomposition properties of the core （CuS） and the protection provided by the shell. To demonstrate the generality of this synthetic approach, three different coating materials （carbon, TiO2, MoS2） have been chosen to prepare Cu2_S@C, Cu2_S@TiO2 and Cu2_xS@MoS2 hollow spheres. All synthesized composite materials were then assembled as electrodes and tested in lithium batteries, showing excellent cycling stability. In particular, the electro- chemical properties of Cu2_xS@C were thoroughly investigated. The results of this work provide an alternative route to prepare coated metal sulfide hollow soheres for enerL^v storage aoDlications.Owing to their unique structural stability and impressive long-term cycling performance, coated hollow structures are highly attractive for energy storage systems, especially batteries. Many efforts have been devoted and various strategies have been proposed to prepare such materials. In the present work, we propose a self-templating thermolysis strateg different from traditional wet processing methods, to fabricate cuprous sulfide hollow spheres coated with different shells, by exploiting the thermal decomposition properties of the core （CuS） and the protection provided by the shell. To demonstrate the generality of this synthetic approach, three different coating materials （carbon, TiO2, MoS2） have been chosen to prepare Cu2_S@C, Cu2_S@TiO2 and Cu2_xS@MoS2 hollow spheres. All synthesized composite materials were then assembled as electrodes and tested in lithium batteries, showing excellent cycling stability. In particular, the electro- chemical properties of Cu2_xS@C were thoroughly investigated. The results of this work provide an alternative route to prepare coated metal sulfide hollow soheres for enerL^v storage aoDlications.

关 键 词：self-templatingthermolysis sulfide hollow spheres lithium batteries 

分 类 号：O643.36[理学—物理化学] TH117[理学—化学]