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Nano Research

Article Title

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

Authors

Yunhui Wang, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen 361005, China Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen 361005, China State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Xiamen University, Xiamen 361102, China
He Li, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen 361005, China Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen 361005, China State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Xiamen University, Xiamen 361102, China
Yiyong Zhang, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen 361005, China Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen 361005, China State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Xiamen University, Xiamen 361102, China
Yueying Peng, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen 361005, China Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen 361005, China State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Xiamen University, Xiamen 361102, China
Peng Zhang, State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Xiamen University, Xiamen 361102, China College of Energy, Xiamen University, Xiamen 361102, China
Jinbao Zhao, State Key Lab of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen 361005, China Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen 361005, China State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Xiamen University, Xiamen 361102, China College of Energy, Xiamen University, Xiamen 361102, China

Keywords

self-templating thermolysis, sulfide, hollow spheres, lithium batteries

Abstract

ABSTRACT 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 strategy, 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–xS@C, Cu2–xS@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 electrochemical properties of Cu2–xS@C were thoroughly investigated. The results of this work provide an alternative route to prepare coated metal sulfide hollow spheres for energy storage applications.

Graphical Abstract

Publisher

Tsinghua University Press

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