title: CoMn(2)O(4) spinel hierarchical microspheres assembled with porous nanosheets as stable anodes for lithium-ion batteries.
abstract: Herein, we report the feasibility to enhance the capacity and stability of CoMn(2)O(4) anode materials by fabricating hierarchical mesoporous structure. The open space between neighboring nanosheets allows for easy diffusion of the electrolyte. The hierarchical microspheres assembled with nanosheets can ensure that every nanosheet participates in the electrochemical reaction, because every nanosheet is contacted with the electrolyte solution. The hierarchical structure and well interconnected pores on the surface of nanosheets will enhance the CoMn(2)O(4)/electrolyte contact area, shorten the Li(+) ion diffusion length in the nanosheets, and accommodate the strain induced by the volume change during the electrochemical reaction. The last, hierarchical architecture with spherical morphology possesses relatively low surface energy, which results in less extent of self-aggregation during charge/discharge process. As a result, CoMn(2)O(4) hierarchical microspheres can achieve a good cycle ability and high rate capability.
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China , Hefei, 230026, PR China.
authors.forename: Lin
authors.initials: L
authors.lastname: Hu
authors.forename: Hao
authors.initials: H
authors.lastname: Zhong
authors.forename: Xinrui
authors.initials: X
authors.lastname: Zheng
authors.forename: Yimin
authors.initials: Y
authors.lastname: Huang
authors.forename: Ping
authors.initials: P
authors.lastname: Zhang
authors.forename: Qianwang
authors.initials: Q
authors.lastname: Chen
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D011211:Electric Power Supplies; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007477:Ions; D008094:Lithium / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D008567:Membranes, Artificial; D008863:Microspheres; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties
chemical_list: D007477:Ions; D017895:Manganese Compounds; D008567:Membranes, Artificial; D010087:Oxides; D003035:Cobalt; C027424:manganese oxide; D008094:Lithium