A method of control and optimization of an aluminum -air battery electrolyte concentration
An electrolyte concentration, aluminum-air battery technology, applied in battery electrodes, fuel cell-type half-cells and primary cell-type half-cells, design optimization/simulation, etc. Problems such as poor engineering economy
Active Publication Date: 2022-08-05
CHINA JILIANG UNIV
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Problems solved by technology
At present, most of the research on improving the output performance of aluminum-air batteries mainly focuses on the optimization of battery structure, electrode materials, catalysts, electrolyte additives, etc., while there are few studies on the optimization of operating conditions and it is mainly through a large number of discharge experiments. to measure output performance
Such methods often rely on high-precision hardware, sensors, and various advanced materials to achieve, and may cause irreversible loss to the battery itself, and the overall engineering economy is poor.
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[0045] The above-mentioned method for controlling and optimizing the electrolyte concentration of the aluminum-air battery will be described in detail below with reference to the accompanying drawings. The method includes the following steps:
[0046] Step 1: Model the battery DC internal resistance characteristic mechanism.
[0047] When the aluminum-air battery is actually working, the electrolyte concentration will affect the internal resistance and output performance of the battery. If the concentration is too low, the supply of substances required for the electrode reaction will be insufficient, resulting in a decrease in current density, and the electrochemical reaction cannot be fully carried out; if the concentration is too high, This will lead to excessive viscosity of the electrolyte, hindered ion transport, and will severely corrode the aluminum anode, resulting in a decrease in current density. Therefore, controlling the electrolyte concentration of aluminum-air b...
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The present invention proposes a method for controlling and optimizing the electrolyte concentration of an aluminum-air battery. Aiming at the shortcomings of the traditional method for optimizing the electrolyte concentration in discharge experiments, and considering that the total internal resistance is the fundamental reason that affects the output performance, the minimum total internal resistance of the battery is selected as the The index of output performance optimization; first, the influence of the electrolyte concentration on the total internal resistance is analyzed from the mechanism, and the DC internal resistance characteristic model is established; then the DC internal resistance model is used to calculate the battery operating at any current density under several electrolyte concentrations. Total internal resistance, draw the minimum R-i curve, and obtain the optimal electrolyte concentration corresponding to any current density; finally calculate the hydroxide consumption rate and electrolyte circulation time, and control the battery electrolyte concentration through the electrolyte circulation system; this method It can effectively control the electrolyte concentration of the aluminum-air battery and always keep it in an optimal range, thereby improving the energy utilization efficiency of the aluminum-air battery, and has a certain application range and practical effect.
Description
Technical field: [0001] The invention belongs to the field of metal-air batteries, and relates to a method for controlling and optimizing the electrolyte concentration of an aluminum-air battery. Background technique: [0002] Energy is the foundation of the existence and development of human society. With the rapid development of today's world economy, the huge world population and the increasing dependence of human beings on fossil energy, the environmental problems are becoming more and more serious. In the future, the society requires an efficient, clean, economical and safe energy system, and the need to find new renewable green energy is imminent. As a new type of energy battery, aluminum-air battery has the advantages of environmental friendliness, high current density, high specific energy, abundant and cheap electrode materials, and long life in metal-air batteries, and has a bright market application prospect. [0003] The unpleasant working environment will seri...
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IPC IPC(8): H01M4/90G06F30/20H01M4/88H01M12/06G06F113/08G06F119/08
CPCH01M4/9041H01M4/9083H01M4/8825H01M12/06G06F30/20G06F2113/08G06F2119/08
Inventor 卫东陈国泽严梦男
Owner CHINA JILIANG UNIV