Preparation method of Ni0.9Zn0.1O and prepared Ni0.9Zn0.1O and application of Ni0.9Zn0.1O

Abstract

The invention discloses a preparation method of Ni0.9Zn0.1O and the prepared Ni0.9Zn0.1O and an application of the Ni0.9Zn0.1O. The preparation method comprises the following steps: with a zinc salt and a nickel salt as metal sources, and dihydric alcohol and deionized water as a mixed solvent, carrying out synthesis by a hydrothermal method to obtain an organic metal composite precursor; and then burning the organic metal composite precursor to obtain the Ni0.9Zn0.1O. The prepared Ni0.9Zn0.1O is a single-phase nickel-zinc composite oxide and is used as an anode material for a lithium-ion battery for the first time. An electrochemical performance test result shows that the reversible specific capacity after 100 cycles under the condition of 0.8A / g is still greater than 600mAh / g; a three-dimensional network structure of the material is beneficial to infiltration and contact of an electrolyte; intercalation and deintercalation of lithium ions are facilitated; the introduced zinc element can improve the conductivity of the material; and the rate capability and the cycle performance are excellent.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and relates to the preparation of a single-phase nickel-zinc composite oxide, in particular to a Ni 0.9 Zn 0.1 The preparation method of O and the prepared Ni 0.9 Zn 0.1 O and its applications. Background technique [0002] Transition metal oxides (including single metal oxides, doped metal oxides, composite metal oxides, etc.) have been widely studied as a new class of anode materials for lithium-ion batteries. Among them, a single cobalt metal oxide is often used as a matrix material for composite double metal oxides due to its high theoretical specific capacity and stable chemical properties. These common composite double metal oxides include ZnCo 2 o 4 、MnCo 2 o 4 、FeCo 2 o 4 and NiCo 2 o 4 Wait. However, the high price of cobalt metal has brought certain restrictions to its application, and it has become an effective way to replace cobalt with relatively cheap nickel...

AI Technical Summary

Problems solved by technology

However, the high price of cobalt metal has brought certain restrictions to its application, and it has become an effective way to replace cobalt with relatively cheap and similar nickel elements.

[0003] In the prior art, the preparation of oxides containing nickel and zinc is mostly concentrated in the field of doped metal oxides, that is, the synthesis of zinc-doped nickel oxide or nickel-doped zinc oxide, because the content of doping elements is relatively low. Low, the phase structure of the original substance has not been changed, that is, it is still the crystal form of nickel oxide or zinc oxide, but this is not a nickel-zinc composite double metal oxide in the strict sense, and no crystals different from nickel oxide or zinc oxide have been obtained. single phase structure

If the existing synthesis method of doped metal oxide is used to further increase the content range of another element, a new phase will be easily formed, which will become a physical mixture of two oxides, and a non-single-phase double metal oxide will be obtained. The homogeneity of the microstructure and the consistency of the atomic arrangement of the mixed material are inferior to those of the single-phase pure substance, so the modification effect is limited.

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