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4259980 
Journal Article 
Simple synthesis of a double-shell hollow structured MnO2@TiO2 composite as an anode material for lithium ion batteries 
Su, Y; Zhang, J; Liu, Kai; Huang, Z; Ren, X; Wang, CAn 
2017 
1 
RSC Advances
EISSN: 2046-2069 
7 
73 
46263-46270 
WOS:000412211300047 
A double-shell hollow structured MnO2@TiO2 anode material has been successfully synthesized through a two-step template method. The monodispersed carbon spheres synthesized through a hydrothermal method act as the templates. The inner part of the carbon template acts as a sacrificial template to form the void and the outer part of it plays the role of self-template to synthesize hollow MnO2 spheres. The composition, crystallinity, morphology, and valence state of the final product MnO2@TiO2 are characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The electrochemical performances of the double-shell hollow structured MnO2@TiO2 anode material have been comprehensively improved. The specific capacity of the composite retains 802 mA h g(-1) at the current rate of 200 mA g(-1) after 200 cycles, and it can still retain about 400 mA h g(-1) at a higher current rate of 1 A g(-1). Finally, a more detailed charging/discharging process of MnO2 is proposed.