High-energy-density liquid metal battery and preparation method thereof
A liquid metal battery, high energy density technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high solubility, poor cycle stability, low conductivity, etc., achieve high discharge voltage, increase energy density, improve The effect of electron conductance
Pending Publication Date: 2022-03-11
UNIV OF SCI & TECH BEIJING
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[0005] The purpose of the present invention is to provide a high energy density liquid metal battery and a preparation method thereof, using Te-based alloys as high-voltage positive electrode materials to solve the problems of low electrical conductivity and low electrical conductivity in molten salts currently existing in the high-voltage Te positive electrode materials described in the background technology. The problem of poor cycle stability caused by high solubility
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[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited thereto.
[0027] The present invention aims at the problem of low electrical conductivity of Te cathode material and high solubility in molten salt, and provides a high energy density liquid metal battery and a preparation method thereof. The cathode material of the battery is metalloid Te and metal Cu, Ag, Au A Te-based alloy formed, the chemical formula of the Te-based alloy is Te 90-50 Cu 10-50 、 Te 90-50 Ag 10-50 、 Te 90-50 Au 10-50 , wherein the lower right corner in the chemical formula represents the mole percentage of each component, and the sum of the mole percentages of each component in each alloy is equal to 100%.
[0028] In the preparation method of the high energy density liquid metal batt...
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Abstract
The invention provides a high-energy-density liquid metal battery and a preparation method thereof, and belongs to the technical field of chemical energy storage batteries. Te-based alloy formed by metal Te and one of Cu, Ag and Au is used as a positive electrode material, alkali metal or alkaline earth metal is used as a negative electrode material, and mixed molten salt containing corresponding alkali metal ions or alkaline earth metal ions is used as an electrolyte material to construct the liquid metal battery. The battery has good electrochemical performance. The metal Te serving as the positive electrode has high voltage (-1.6 V vs.Li / Li < + >), and one of Cu, Ag and Au is introduced into Te to form an alloy, so that the dissolution of the liquid metal Te and a discharge product thereof in a molten salt electrolyte can be remarkably reduced, the utilization rate of the metal Te is increased, the cycle stability of the battery is improved, and the working temperature of the battery is reduced. In addition, due to the introduction of the high-electron conductivity metal, the conductivity of the Te positive electrode material is improved, the polarization of the battery is reduced, the discharge voltage of the battery is improved, and the charge-discharge performance of the battery under high current density is improved.
Description
technical field [0001] The invention belongs to the technical field of chemical energy storage batteries, and in particular relates to a liquid metal battery with high energy density and a preparation method thereof. Background technique [0002] In recent years, in order to alleviate environmental pressure and effectively utilize renewable energy (such as wind energy, solar energy, etc.), large-scale energy storage technologies with high efficiency and low cost have emerged as the times require. On the one hand, large-scale energy storage technology can increase the grid-connected rate of new energy power generation, improve the security and stability of the power grid; at the same time, it can "shave peaks and fill valleys" to improve the contradiction between power supply and demand, improve the efficiency of traditional power generation, and contribute to the construction of smart grid in my country. The improvement of the energy structure provides a technical basis. In ...
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IPC IPC(8): H01M10/39H01M10/38H01M4/38
CPCH01M10/399H01M4/38H01M10/38Y02E60/10Y02P70/50
Inventor 赵海雷褚鹏谢宏亮王捷李泽浩
Owner UNIV OF SCI & TECH BEIJING