Preparation method of lithium-boron alloy strip blank

Abstract

The invention provides a preparation method of a lithium-boron alloy strip blank. The preparation method of the lithium-boron alloy strip blank comprises the following steps: removing a dead head from a round ingot blank, cleaning the surface, then carrying out free upsetting to form a lithium-boron alloy square blank, and putting the lithium-boron alloy square blank into a calender to be thinned and unidirectionally extended. According to the preparation method of the lithium-boron alloy strip blank, the high-performance thermal battery negative electrode material lithium-boron alloy strip with the target shape and size is obtained on the premise that the original internal structure of the lithium-boron alloy ingot blank is not changed, high yield and high stability of the material are achieved through precise matching of precise time and space of all pressing modules, and meanwhile, the cogging process from round billet synthesis to finish rolling of a slab becomes efficient and automatic.

Description

technical field [0001] The invention relates to a preparation method of a lithium-boron alloy strip blank. Background technique [0002] As an ideal lithium-based thermal battery anode material, lithium-boron alloy has outstanding advantages such as high specific energy, high specific power, low polarization, electrochemical potential close to that of pure lithium, and stable structure above 600 °C. Thermal battery anode materials can significantly increase the specific capacity and specific power of thermal batteries. The volume and mass of thermal batteries with the same capacity are reduced by 10% to 30%, the maximum discharge current is increased by 3 times, and the specific capacity is increased by nearly 2 times, effectively The performance of the thermal battery is improved, and an effective material guarantee is provided for the replacement of the military thermal battery. [0003] Lithium-boron alloy belongs to a kind of composite material. The in-situ synthesized ...

AI Technical Summary

Problems solved by technology

The first kind of process is simple, but the final product yield is low due to the inherent shortcomings of processing (edge ​​cracking) in the processing process. Usually, the yield of alloy processing is only 60-70%. Li-boron alloy is a composite material. Once it is scrapped, it can only return to the primary state of the oxide, and there is no residual value, because the alloy raw materials are expensive materials, and the effectiveness of processing determines the final profit margin of the product

The second process is theoretically a process route that can be operated continuously, but in fact, this process produces severe shear strain, which may destroy the structure of the lithium-boron compound generated in situ. Currently, there is no continuous production in the market. demand, it is not economical to explore in this area, so little systematic research is carried out

Due to the limited ductility of composite materials, the side cracks from billet to thin plate are extremely serious, and the material loss rate in this link is very high

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