Template-free synthesis of hierarchical MoO2 multi-shell architectures with improved lithium storage capability

• Main Authors: Tang, Shasha, Shen, Chao, Ji, Wenhai, Liu, Jun, Fichou, Denis
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2017
• Subjects: Oxides; Nanostructures
• Online Access: https://hdl.handle.net/10356/86337; http://hdl.handle.net/10220/44015
• Institution: Nanyang Technological University

A hierarchical multi-shell structure of MoO2 is synthesized through a template-free one-pot solvothermal method. The relative MoO2 electrode exhibits high reversible specific capacity of 780 mA h g−1 after 40 cycles, good stability, high capacity retention and improved rate performance in the lithium ion battery application. This material has a unique hierarchical architecture which is a combination of pure hollow structure and core-shell structure. Such a hierarchical multi-shell structure can not only amplify active mass-electrolyte contact area and minimizes lithium ion diffusion path, but also provides a unique interstitial void space to relieve the huge volume change of material. Materials with a hierarchical multi-shell structure are expected to be promising candidates in lithium ion batteries application.