A Verified Method for Enhanced Lithium Storage Performance of Fe-Mo Bimetallic Oxide

Abstract

The invention provides a verification method for enhancing the lithium storage performance of Fe-Mo double metal oxides, specifically comprising: step 1, utilizing ferric nitrate nonahydrate and molybdenum acetylacetonate to prepare Fe-Mo precursor; step 2, adding 20mg Fe-Mo Add the Mo precursor to 30ml of absolute ethanol, stir for 2h, put it into a PE bag, and discharge the internal air; step 3, place three samples of the same mixture in a radiation field 30cm away from the radiation source, and the irradiation dose Set to 150, 200 and 250kGy respectively; step 4, will pass through three kinds of different irradiation and unirradiated Fe-Mo precursors in tube furnace with two kinds of atmospheres of hydrogen-argon gas and air heat treatment, obtain four Part final sample; step 5, carry out phase characterization and electrochemical property test to three kinds of irradiation doses and the final sample obtained without irradiation. Through verification, it was found that Fe 2 o 3 / MoO 2 ‑200kGy shows good cycle stability and rate performance, which is mainly due to the fact that the appropriate dose of high-energy electron beams induces defects on the surface of the material, which increases the number of active sites.

Description

technical field [0001] The invention relates to a method for improving lithium storage performance, in particular to a verification method for enhancing the lithium storage performance of Fe-Mo double metal oxides. Background technique [0002] With the intensification of environmental problems and the shortage of fossil fuels forcing researchers to shift their research focus to sustainable and renewable resources, therefore, governments around the world are targeting green energy technologies (solar, wind, etc.) and energy storage systems as the core Many electric vehicles have been explored. As we all know, the development of new materials with excellent performance is the first step in energy storage systems. Although the development of battery research is impressive, the research goal has not changed over the years: under the premise of ensuring high specific capacity and excellent cycle performance, Reduce material preparation and modification costs, shorten reaction t...

AI Technical Summary

Problems solved by technology

However, metal oxides inevitably encounter several major problems: drastic volume change during lithium ion intercalation / deintercalation, bulk polarization of the material; easy aggregation of particles; poor electronic conductivity, which hinders the interaction with Li + reaction, leading to its poor electrochemical performance

However, the above three improvement measures have undoubtedly promoted the research of energy storage devices. Compared with commercial graphite electrodes, the specific capacity and cycle life have been significantly improved, but most of these measures rely on wet chemical methods, which require cumbersome The experimental steps and high cost make these researches currently limited to experiments and cannot be promoted in industry.

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