Foam nickel loaded nanorod-like cobalt molybdate as well as preparation method and application thereof

Abstract

The invention discloses foam nickel loaded nanorod-like cobalt molybdate as well as a preparation method and application thereof. The preparation method of the foam nickel loaded nanorod-like cobalt molybdate comprises: a cleaning step of foam nickel; a preparation step of a reaction liquid: dissolving molybdate and cobalt salt into water respectively, stirring and dissolving to obtain a molybdateliquid and cobalt salt liquid, adding the molybdate liquid into the cobalt salt liquid dropwise and continuously stirring to obtain reaction liquid which is mixed uniformly; a hydrothermal treatmentstep; and a treatment step of hydrothermal products. Nanorod-like cobalt molybdate grows on the surface of the foam nickel by a hydrothermal synthesis method, so that the electrical conductivity of the cobalt molybdate is effectively improved; the uniform nanorod-like structure shortens the embedding distance of lithium ions; when the material is applied to a lithium ion battery negative electrodematerial, the electrical conductivity and the rate performance of the material can be effectively improved; in addition, the foam nickel loaded nanorod-like cobalt molybdate as well as the preparation method and application thereof have the advantages of simple preparation process, convenience in operation, high reproducibility and the like.

Description

technical field [0001] The invention relates to a nano-rod cobalt molybdate supported on foamed nickel and its preparation method and application, belonging to the field of inorganic material synthesis and its application in the field of electrochemistry. Background technique [0002] Transition metal oxides, as anode materials for lithium-ion batteries, are expected to replace traditional carbon-based anode materials due to their high theoretical capacity and energy density, excellent cycle life and rate performance, abundant mineral resources, and simple preparation processes. However, during the charging and discharging process, along with the insertion and extraction of lithium ions, alloying and dealloying, oxidation and reduction reactions, etc., the structure will inevitably be damaged, and the collapse of the structure and the powdering of the active material will occur. It leads to adverse effects such as increased internal resistance of the battery, capacity fading...

AI Technical Summary

Problems solved by technology

Cobalt molybdate is a lithium-ion battery negative electrode material with great potential in molybdate. According to the literature search, the report of foam nickel-loaded cobalt molybdate as lithium-ion battery negative electrode material has not yet been published, and it is currently used as a positive electrode material for supercapacitors. In reports, such as: GK Veerasubramani,Improved electrochemical performances of binder-free CoMoO 4 nanoplate arrays@Ni foamelectrode using redox additive electrolyte, Journal of Power Sources,2016,306:378-386., Z Zhang et al.,Formation of hierarchical CoMoO4@M core–shell nanosheet arrays on nickel foam with markedly enhanced pseudocapacitive properties, Journal of Power Sources,2015,296:162-168., and Chinese patent CN 104752071 A

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