MoS2-coated CuS-coated EG nano hollow flower-like magnesium-lithium double-salt battery positive electrode material, preparation method and application thereof

Abstract

The invention relates to a MoS2-coated CuS-coated EG nano hollow flower-like magnesium-lithium double-salt battery positive electrode material as well as a preparation method and application thereof,and the preparation method comprises the following steps: respectively weighing sodium molybdate, hydroxylamine hydrochloride, thiourea and expanded graphite, and dissolving in deionized water to obtain a solution A; adding hexadecyl trimethyl ammonium bromide into the solution A under a magnetic stirring condition, and adjusting the pH value with hydrochloric acid to obtain a solution B; adding CuCl2. 2H2O into the solution B under a magnetic stirring condition to obtain a solution C; and transferring the solution C into a hydrothermal reaction kettle, carrying out hydrothermal reaction, cooling after the reaction is finished, cleaning the reaction product with deionized water and ethanol, and drying at a certain temperature to obtain the MoS2-coated CuS-coated EG multiphase composite nano hollow flower-like magnesium-lithium double-salt ion battery positive electrode material. According to the material, high capacity, high magnification and long cycle stability can be realized at thesame time.

Description

technical field [0001] The invention relates to the technical field of secondary power battery materials, in particular to a MoS2@CuS@EG nanometer hollow flower-shaped magnesium-lithium double-salt battery positive electrode material and its preparation method and application. Background technique [0002] The rapid development of the world economy has benefited from the wide application of fossil energy, but fossil energy is non-renewable and will emit a large amount of harmful substances during use, causing environmental pollution, and fossil energy will inevitably face the problem of depletion in the near future. In order to alleviate problems such as energy crisis and environmental pollution, it has become a top priority to find clean and renewable energy that can replace fossil energy. [0003] Lithium-ion batteries have been widely adopted in various electronic devices (such as digital cameras, mobile phones, computers, etc.) due to their high capacity and stable cycle...

AI Technical Summary

Problems solved by technology

MoS 2 The electrochemical activity is high, and there are many active sites on the edge, but its conductivity is poor, which affects the energy storage effect of the positive electrode material

At present, the above problems can be improved by means of ion doping, but pure doping, although it can improve the conductivity or activity of electrode materials, thereby enhancing electron transport and Li + Ion intercalation / extraction process

However, the repeated action of volume expansion / contraction of the electrode material due to the entry and exit of ions can easily lead to the collapse of the electrode material structure and the loss of good electrochemical cycle stability.

Images