title: Tuning the Morphologies of MnO/C Hybrids by Space Constraint Assembly of Mn-MOFs for High Performance Li Ion Batteries.
abstract: Morphology controllable fabrication of electrode materials is of great significance but is still a major challenge for constructing advanced Li ion batteries. Herein, we propose a novel space constraint assembly approach to tune the morphology of Mn(terephthalic acid) (PTA)-MOF, in which benzonic acid was employed as a modulator to adjust the available MOF assembly directions. As a result, Mn(PTA)-MOFs with microquadrangulars, microflakes, and spindle-like microrods morphologies have been achieved. MnO/C hybrids with preserved morphologies were further obtained by self-sacrificial and thermal transformation of Mn(PTA)-MOFs. As anodes for Li ion batteries, these morphologies showed great influence on the electrochemical properties. Owing to the abundant porous structure and unique architecture, the MnO/C spindle-like microrods demonstrated superior electrochemical properties with a high reversible capacity of 1165 mAh g-1at 0.3 A g-1, excellent rate capability of 580 mAh g-1at 3 A g-1, and no considerable capacity loss after 200 cycles at 1 A g-1. This strategy could be extended to engineering the morphology of other MOF-derived functional materials in various structure-dependent applications.
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University , 410083 Changsha, P. R. China.
authors.forename: Dan
authors.initials: D
authors.lastname: Sun
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University , 410083 Changsha, P. R. China.
authors.forename: Yougen
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St. Lucia, QLD 4072, Australia.
authors.forename: Delai
authors.initials: D
authors.lastname: Ye
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University , 410083 Changsha, P. R. China.
authors.forename: Jun
authors.identifier: http://orcid.org/0000-0002-6158-0614
authors.initials: J
authors.lastname: Yan
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST) , 1-1-1, Umezono, Tsukuba 305-8568, Japan.
authors.forename: Haoshen
authors.initials: H
authors.lastname: Zhou
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University , 410083 Changsha, P. R. China.
authors.forename: Haiyan
authors.identifier: http://orcid.org/0000-0002-2242-6534
authors.initials: H
authors.lastname: Wang
keywords: Li ion battery; MnO/C anode; metal−organic frameworks; morphology tuning; space constraint assembly