High-capacity lithium thionyl chloride energy type battery and preparation method thereof

Abstract

The invention discloses a high-capacity lithium thionyl chloride energy type battery and a preparation method thereof, wherein the high-capacity lithium thionyl chloride energy type battery is characterized in that a cylindrical positive electrode carbon ring, which is tightly attached to a side surface diaphragm and is formed by granular materials in a pressing mode, is arranged in a negative electrode lithium sheet; a cavity for filling an electrolyte is formed in the positive electrode carbon ring, and a current collector is tightly attached to the inner wall of the positive electrode carbon ring; a surface membrane component which is matched with the current collector to prevent particle material leakage is arranged on the top of the positive electrode carbon ring; and the current collector is connected with a positive electrode cover set. According to the battery, the annular current collector with an opening is extremely easy to install; a positive electrode ball material is pressed into the positive electrode carbon ring; when the current collector is assembled, the outer diameter is reduced and then is loaded into the positive electrode carbon ring by extrusion; the material of the current collector has certain elasticity, so that the outer wall of the current collector after rebounding and the positive electrode carbon ring are well attached, and no damage is caused tothe inner wall of the positive electrode carbon ring; and meanwhile, the internal resistance is lowered, so that it is ensured that the internal resistance increase of the battery is relatively low in the later period.

Description

technical field [0001] The invention relates to a lithium thionyl chloride battery, in particular to a high-capacity lithium thionyl chloride energy type battery and a preparation method thereof. Background technique [0002] Lithium thionyl chloride battery uses metal lithium as the negative electrode, liquid thionyl chloride as the positive active material and electrolyte at the same time, LiAlCl 4 It is the power source of the electrochemical system with electrolyte salt, porous carbon as positive electrode conductor and reaction site. Among them, SOCl 2 It is both a reaction substance and a non-aqueous inorganic solvent, dissolving LiAlCl 4 The solution after adding additives is an inorganic electrolyte, and the battery of this system has the highest specific energy among all batteries, and its overall reaction mechanism is: 4Li+2SOCl 2 →4LiCl+S+SO 2 ; due to the formation of insoluble solid products LiCl and S. [0003] Existing batteries are discharged with a smal...

AI Technical Summary

Problems solved by technology

The positive current collector bar is only welded to the core post at the upper end of the battery core, which leads to: 1. Both ends of the current collector bar need to be welded, and the installation process is complicated. 2. It is impossible to go deep into the positive electrode material to collect the current as much as possible. The liquid level of the electrolyte drops and the battery lies flat, especially when the positive electrode current collector is above the liquid level, the current collection efficiency is poor; 3. The lithium sheet will be consumed in the later stage, resulting in poor contact with the battery cell, resulting in a substantial increase in the internal resistance of the battery

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