A kind of aluminum alloy negative electrode material for battery and preparation method thereof

Abstract

The invention discloses an aluminum alloy anode material for batteries. The aluminum alloy anode material is prepared from the following components in percentage by mass: 0.001-1% of lanthanum, 0.001-1% of gallium, 0.001-1% of magnesium, 0.001-1% of indium and the balance of aluminum. The invention further provides a preparation method of the aluminum alloy anode material for batteries. According to the preparation method, three types of different thermal treatment processes such as high temperature and long time, medium temperature and short time and low temperature and long time are matched with a deformation process, and optimal regulation and control on material components, texture structures and alloy phase of the aluminum alloy anode material are achieved. The addition of alloy elements is appropriately adjusted, and with the combination of appropriate plastic formation processes and thermal treatment processes of the aluminum alloy anode material, optimal matching of multiple elements can be achieved, and requirements of power source discharge can be met under a large current density of 500mA / cm<2> / 1000mA / cm<2>. The aluminum alloy anode material disclosed by the invention is short in production process procedure, easy in process parameter control, good in aluminum alloy anode product quality, low in production cost and beneficial to on-scale production.

Description

Technical field [0001] The invention relates to an aluminum alloy negative electrode material for batteries and a preparation method thereof, and belongs to the technical field of application of new energy materials. Background technique [0002] Metal aluminum is a very active anode material. Its standard potential is very negative. It is -2.4V (vs standard hydrogen electrode) in alkaline electrolyte solution and -1.6V (vs standard hydrogen electrode) in neutral electrolyte solution. ). The electrochemical equivalent of aluminum is very large, 2980Ah / Kg, and aluminum is rich in reserves, low in cost, and the reaction products will not cause environmental pollution. It is an ideal negative electrode material for batteries. [0003] In the electrolyte solution, the chemical activity of aluminum is high, and its surface is easily protected by the film of aluminum oxide, which makes it difficult for the electrochemical reaction to continue and causes serious polarization. Therefore,...

AI Technical Summary

Problems solved by technology

According to the content of the patent invention, it can be seen that the aluminum alloy negative electrode material is at 100mA / cm 2 The discharge voltage value obtained by discharging for 10 hours under the condition of current density, generally speaking, with the increase of discharge current density and the prolongation of discharge time, the discharge voltage of the negative electrode material will drop sharply, and the service function of the battery will be lost.

Images