Positive electrode material of liquid or semi-liquid metal battery and preparation method and application thereof

Abstract

The invention discloses a positive electrode material of a liquid or semi-liquid metal battery and a preparation method and application thereof, and belongs to the field of electrode materials of energy storage batteries. Metal Ga or Ga alloy formed by Ga and one or more elemental substances of Sb, Bi, Sn and Pb is used as a positive electrode material to be alloyed with existing negative electrode materials (Li, Na, K, Ca and Mg), thus having good electrochemical performance. The metal Ga has a very low melting point (29.8 DEG C.). The Ga alloy is simple to prepare. The Ga or the Ga alloy isused in liquid or semi-liquid metal batteries to maintain the advantages of high capacity and long service life of liquid or semi-liquid metal batteries and reduce the working temperature of the batteries, reduce the polarization of the batteries, increase or stabilize the discharge voltage of the batteries and improve the charging and discharging performance of the batteries under high current density.

Description

technical field [0001] The invention belongs to an electrode material for an energy storage battery, in particular to a positive electrode material for a liquid or semi-liquid metal battery and a preparation method thereof, which can be used to solve the problem of low working voltage and energy efficiency of a liquid or semi-liquid metal battery under high current density low problem. Background technique [0002] The rapid development and utilization of renewable energy technologies such as wind energy and solar energy have effectively alleviated the environmental degradation caused by fossil fuel combustion, but renewable energy still has problems such as time and space intermittency and low efficiency of integration into the grid. Large-scale high-efficiency energy storage technology will significantly improve the grid-connected efficiency and reliability of intermittent renewable energy, and ensure the stability, reliability and security of the grid. Among various ener...

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Problems solved by technology

[0005] The invention provides a positive electrode material of a liquid or semi-liquid metal battery and a preparation method thereof. After being applied to an energy storage battery, it solves the problem of low working voltage and low energy consumption caused by the large polarization of the existing liquid or semi-liquid metal battery at a high current density. Low efficiency and other issues

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