Synergistic Interface and Mesopore Engineering with More and Quicker Ion Storage for Enhanced Performance of Lithium‐Ion Battery

Abstract

Designing hetero-nanostructures is widely recognized as an effective modification strategy to obtain ZnO/Co 3 O 4 anode materials with superior electrochemical properties. However, the lithium-ion storage behavior of ZnO/Co 3 O 4 has not reached a satisfied performance. Herein, based on our previous DFT results that the interface of ZnO(110)/Co 3 O 4 (220) hetero-nanostructure possesses fast reaction kinetics because of more negative surface adsorption energy and lower diffusion barrier energy of lithium ions, we developed ZnO(110)/Co 3 O 4 (220)@C hetero-nanostructures with both abundant interfaces and uniform mesopores structure derived from 2D MOF precursor. Especially, ZnO/Co 3 O 4 @C hybrid materials with ZnO(110)/ Co 3 O 4 (220) hetero-nanostructure show strong electronic inter-actions and the widen distance of the crystal plane at the interface, resulting in stable hetero-nanostructures with faster ion diffusion channel and more active sites. Moreover, this material possesses uniform mesopores and 2D structure, which enables quicker transport capability and cycling longevity for lithium-ion storage. Impressively, when ZnO/Co 3 O 4 @C was used as anodes in lithium-ion batteries, the electrodes deliver improved initial specific capacities (1,630.5 and 1,496.9 mAh g À 1 at 0.2 and 0.5 A g À 1 ), excellent capacity retention (1,758.3 mAh g À 1 after 370 cycles at 0.2 A g À 1 , and 607.7 mAh g À 1 up to 650 cycles at 5 A g À 1 ), and superior rate capacity (937 and 468 mAh g À 1 at 1.0 and 5.0 A g À 1 after 360 cycles).

Low Barriers and Faster Electron/Ion Transport Rates through the Ga2O3/MnCO3 Anode with a Heterojunction Structure for Lithium-Ion Batteries

“…The interfaces generated by composite structures constructed based on different materials can form heterojunctions. , Due to the difference in the energy band structure and the Fermi level, energy band bending is formed at the interface of the material, which brings the Fermi level to the same level on both sides. This process causes electrons from one side of the high Fermi level to flow to the other side, creating a region of space charge, which forms an electric field, and it has been proved that this electric field has a positive effect on the transport of electrons .…”

Construction of Zinc MOFs-Derived Carbon-Based Zn–Co Oxides Porous Nanocages and Their Application as Electrodes for Electrochemical Energy Storage

“…This is because the gaps between the nanocomposite structures provide a larger specific surface area, which can alleviate the volume expansion of the material during the electrochemical reaction, reduce the internal stress, reduce the migration path of Li + during charging and discharging, improve the reactivity, and further enhance its electrochemical performance. 11,12 In addition, metal−organic backbone materials (MOFs), which are mainly formed by interlinking organic ligands and metal ion centers, are of great interest due to their distinctive porous structure and controllable pore size and organic− inorganic hybridization properties, and they are widely used as precursors for various nanostructures. 13,14 MOF materials have relatively high theoretical capacities, but most of them have poor electrical conductivity, while the introduction of transition-metal complexes in the framework can significantly enhance their electrical conductivity.…”

“…The energy crisis is one of the challenges facing the 21st century, so how to solve the energy problem and develop sustainable green new energy has become the focus of researchers. , At present, the lithium ion battery (LIB) has gradually become a new generation of high-efficient energy storage device due to its significant advantages such as high volume density, stable discharge voltage, and long cycle life. , Since the advent of LIBs, efforts have been made to obtain electrode materials with low cost, high cycling stability, and high specific capacity. , Transition-metal oxides (TMOs) stand out among many anode materials due to their cheap and easy preparation and high specific capacity. , However, TMOs inherently suffer from defects such as volume expansion and poor cycling stability, leading to slow reaction kinetics, electrode pulverization, and large irreversible capacity loss. , Nanocomposites can effectively solve the above problems. This is because the gaps between the nanocomposite structures provide a larger specific surface area, which can alleviate the volume expansion of the material during the electrochemical reaction, reduce the internal stress, reduce the migration path of Li + during charging and discharging, improve the reactivity, and further enhance its electrochemical performance. , …”

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

“…10,11 Commonly, the OER and HER process require highly efficient electrocatalysts which can provide with lower reaction adsorption energy barrier and maintain long-term stability over times. 12,13 At present, the most advanced electrocatalysts in the field of total hydrolysis are still precious-metal-based catalysts, for example commercial Pt/C electrode for HER while Ru/Ir oxides electrode for OER. 14,15 However, it is subjected to limitations with widely applicating for precious metal electrocatalysts due to their scarce storage and high price.…”

“…However, it is not easy to synthesize the bimetallic dual‐cation doped electrocatalysts at the technical level for water splitting 10,11 . Commonly, the OER and HER process require highly efficient electrocatalysts which can provide with lower reaction adsorption energy barrier and maintain long‐term stability over times 12,13 . At present, the most advanced electrocatalysts in the field of total hydrolysis are still precious‐metal‐based catalysts, for example commercial Pt/C electrode for HER while Ru/Ir oxides electrode for OER 14,15 .…”