Sodium ion battery negative electrode material and preparation method thereof

Abstract

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: 1, putting a potassium source, a titanium source, a lithium source and potassium molybdate into mixing equipment, performing stirring and mixing fully, and then performing grinding by using grinding equipment to obtain powder; 2, putting the powder obtained in the step 1 into a platinum crucible, putting the platinum crucible into a sintering furnace to be sintered for 5h, and performing cooling for standby application after sintering is completed. The carbon source is prepared from the dried small shrimps, and then the potassium lithium titanate is coated with the carbon source, so that the structural stability and the conductivity of the potassium lithium titanate can be effectively improved, the using effect of the potassium lithium titanate as the negative electrode material is remarkably improved, and the carbon source is prepared from the dried small shrimps, so waste utilization can be achieved, and the resources are utilized to the maximum degree; meanwhile, the storage capacity and the cycle performance can be further improved, and meanwhile, the dried small shrimps are renewable energy sources, so that the method is suitable for sustainable development.

Description

technical field [0001] The invention relates to the technical field of sodium ion batteries, in particular to a negative electrode material for a sodium ion battery and a preparation method thereof. Background technique [0002] Lithium batteries are a type of batteries that use lithium metal or lithium alloys as positive / negative electrode materials and use non-aqueous electrolyte solutions. [0003] With the development of lithium batteries, the demand is increasing. However, the limited amount of lithium has brought great obstacles to the development of lithium batteries. In order to ensure the sustainable development of batteries, the existing utilization Sodium ions replace lithium ions, and the amount of sodium ions is larger, so it is more suitable for long-term development than lithium ions. [0004] In the process of processing sodium-ion batteries, the material requirements for its positive and negative electrodes are relatively high. In the process of preparing t...

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Problems solved by technology

[0004] In the process of processing sodium-ion batteries, the material requirements for its positive and negative electrodes are relatively high. In the process of preparing the negative electrode materials of existing sodium-ion batteries, lithium potassium titanate is often used as the negative electrode material of lithium batteries. Although The modified material has a large interplanar spacing, which is conducive to intercalation and extraction of ions at the layer, but due to the general structural stability of the material, the cycle performance is poor and the electronic conductivity is low.

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