4.7 Article

Fabrication of Sustainable Hybrid MOF/Silica Electrodes for Current Lithium-ion Batteries and Beyond

Journal

ACS APPLIED ENERGY MATERIALS
Volume 5, Issue 12, Pages 15155-15165

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c02821

Keywords

silica anode; ZIF67; sustainable lithium-ion batteries; high mass loaded cathodes; ether-based electrolyte

Funding

  1. Natural Science Foundation of China
  2. [32071317]

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This study introduces an effective strategy for synthesizing silica-based anodes for lithium-ion batteries. The silica-based electrode demonstrates excellent electrochemical performance and compatibility with ether-based electrolytes, suggesting its potential applications in high-energy and environmentally sustainable lithium-based batteries.
Natural abundance and well-explored synthesis of silica are among the main motivations for the impressive evolution of silicon-based electrodes occurring over the last few years. In this work, an effective strategy has been introduced for the realization of silica-based anodes for lithium-ion batteries (LIBs) starting from zeolitic imidazolate framework-67 (ZIF67)/mesopores silica (mSiO2), which has been employed as a precursor. This approach leads to the realization of a hybrid electrode formed by the combination of a carbon nanotube (CNT) grown on the nitrogen -doped graphene-like structure, ultrafine cobalt-based nanoparticles, and silica (SiO2/Co3O4/NGC/CNT). From an electrochemical point of view, the performance of this engineered hybrid silica-based electrode (EHSiE), formed by water and a cellulose-based binder, is evaluated in both LP30 and ether-based electrolyte environments, the latter being particularly attractive in the emerging field of sulfur-based batteries. The EHSiE electrode displays a remarkable stability for 1000 cycles with the high reversible capacity of similar to 410 mA h g-1 at 5 A g-1 versus Li/Li+ in the LP30 electrolyte. Moreover, this electrode discloses a good electrochemical behavior when coupled with high mass loading LiFePO4 cathode to design a full LIB. More impressively, a systemic investigation reveals remarkable compatibility of EHSiE with ether-based electrolytes, providing a specific discharge capacity of 300 mA h g-1 for 500 cycles at 1 A g-1. These results suggest that the engineered electrode can be successfully applied in the field of high-energy and environmentally sustainable lithium-based batteries.

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