Construction of Co3O4@TiO2 heterogeneous mesoporous hollow nanocage-in-nanocage from metal-organic frameworks with enhanced lithium storage properties

Preparation and lithium storage of core–shell honeycomb-like Co3O4@C microspheres

“…The abundant nanopores distributed throughout the microspheres were conducive to increasing the specic surface area, providing more active sites for the full electrochemical reaction, and improving the reversible specic capacity. 36,37 Furthermore, the cavity between the core and shell and the nanopores distributed throughout the microspheres were benecial in relieving the volume expansion from the long-term charge and discharge processes, thereby enhancing the cycling stability of the microspheres. 38,39 In addition, the coated carbon layers could improve the conductivity of the microspheres, promote the transfer of electrons, and alleviate electrode polarization, thereby improving the rate capability.…”

Metal‐Organic Framework Derived Ge/TiO2@C Nanotablets as High‐Performance Anode for Lithium‐Ion Batteries

“…Figure e displays the Nyquist plots of the fresh TiO 2 @C and Ge/TiO 2 @C electrodes. The ohmic resistance R b means the resistance of the electrolyte and cell components and R ct denotes the charge transfer resistance . After introduction of Ge, both R b and R ct reduce from 73.19 and 7.63 Ω (for the TiO 2 @C) to 59.83 and 0.21 Ω (for the Ge/TiO 2 @C), respectively, indicating the enhanced charge transfer rate of the Ge/TiO 2 @C. Besides, the diffusion rates of the TiO 2 @C and Ge/TiO 2 @C are calculated as 3.16×10 −21 and 9.11×10 −19 m 2 s −1 (according to Eq.…”

Metal‐organic framework derived porous structures towards lithium rechargeable batteries

“…In addition to single‐metal TMOs, the compositional and conformational diversity of MOF precursors enables the preparation of MOF‐derived TMOs with complicated structure and chemical composition such as nanocubes, 482,483 nanocages, 484,485 hollow polyhedra, 486–488 and hollow nanocages 489,490 . Ma et al synthesized cubic and stellated octahedron‐shaped SnO/C polyhedra using Sn‐based MOFs as templates and applied them in Li + storage 488 .…”

“…ZIF‐67 derived Co x P‐NC exhibited a high capacity of 1224 mAh g −1 at a current density of 0.1 A g −1 and an ultra‐long lifespan of 1800 cycles. Table 4 summarizes recent studies in which MOFs or MOF derived materials were applied as the anode or cathode materials for LIBs 217,219,419,424–426,431,434,443,446,449,452–455,457,464,466,469,470,483,485–487,489,490,501,502,512,516–524 …”