title: Rational Construction of Multivoids-Assembled Hybrid Nanospheres Based on VPO4Encapsulated in Porous Carbon with Superior Lithium Storage Performance.
abstract: The design of a new nanostructured anode material with high tap density while still keeping the common advantages of the hollow structure is a great challenge for future lithium-ion batteries (LIBs). Here, multivoids-assembled hierarchically meso-macroporous nanospheres based on VPO4encapsulated in porous carbon (MVHP-VPO4@C NSs) were designed and fabricated. This unique structure can evidently decrease the excessive interior space in hollow spheres or multishelled hollow spheres to gain high volumetric energy density and at the same time can alleviate the large mechanical strain during the cycling process. As expected, MVHP-VPO4@C NSs show good lithium storage behavior with gravimetric discharge capacity of 628 mAh g-1after 100 cycles at a current density of 100 mA g-1. Furthermore, the full cell (LiFePO4cathode//MVHP-VPO4@C NSs anode) also exhibits outstanding lithium storage performance. The insight obtained from this structure may provide guidance for the design of other electrode materials experiencing large volume variation during the lithiation-delithiation process.
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Di
authors.initials: D
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Meng
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Jinwen
authors.initials: J
authors.lastname: Qin
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Yin
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology , Beijing 100081, P. R. China.
authors.forename: Minhua
authors.identifier: http://orcid.org/0000-0002-2232-6859
authors.initials: M
authors.lastname: Cao
keywords: Vanadium phosphate; assembly; lithium-ion batteries; multivoids; nanospheres