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Li-SOCl2 cell anode powder mixing method

A thionyl chloride battery and positive electrode technology, applied in the direction of electrode carrier/current collector, can solve the problems of difficulty in controlling the extensibility of PTFE, increasing process complexity, high energy consumption, etc., and achieve discharge platform and capacity uniformity Good, overcome the effect of uneven mixing and uniform mixing

Active Publication Date: 2019-05-31
武汉昊诚锂电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology uses a high-speed mixer to mix the powder evenly, but its energy consumption is high, the cost is high, and it is also difficult to control the extensibility of PTFE, which increases the complexity of the subsequent process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Lithium-thionyl chloride battery positive electrode and powder method, and the powder formula is: acetylene black: 8Kg, polytetrafluoroethylene emulsion: 1.0Kg, copper powder: 1.05Kg, isopropanol: 11Kg, deionized water: 25Kg.

[0040] Its and powder method comprises the steps:

[0041] Step 1: Add the acetylene black of the stated weight into the blender and stir at room temperature of 25±5°C and humidity of 50%±20%;

[0042] Step 2: Mix the polytetrafluoroethylene emulsion, isopropanol and deionized water according to the weight to obtain a mixed solution, take half the weight of the mixed solution and add it to a blender, stir and mix to obtain a mixed powder;

[0043] Step 3: After stirring for 15 minutes, release about 20% of the total amount of mixed powder from the outlet at the bottom of the mixer.

[0044] Step 4: Add the metal powder of the stated weight into the blender evenly from the inlet of the blender, then add the mixed powder released in step 3 from th...

Embodiment 2

[0047] Lithium-thionyl chloride battery positive electrode and powder method, and the powder formula is: acetylene black: 10Kg, polytetrafluoroethylene emulsion: 1.5Kg, copper powder: 1.00Kg, isopropanol: 10Kg, deionized water: 20Kg.

[0048] Its kneading powder method is with embodiment 1.

Embodiment 3

[0050] Lithium-thionyl chloride battery positive electrode and powder method, and the powder formula is: acetylene black: 12Kg, polytetrafluoroethylene emulsion: 2.0Kg, copper powder: 0.95Kg, isopropanol: 7Kg, deionized water: 15Kg.

[0051] Its kneading powder method is with embodiment 1.

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Abstract

The invention discloses a Li-SOCl2 cell anode powder mixing method. The method comprises the following steps of adding acetylene black with the weight to a powder mixing machine for stirring at the room temperature of 25+ / - 5 DEG C and the humidity of 50%+ / -20%; The method comprises: adding acetylene black with the weight to a powder mixing machine for stirring at the room temperature of 25+ / - 5 DEG C and the humidity of 50%+ / -20%; mixing a polytetrafluoroethylene emulsion with the weight, isopropanol and deionized water to obtain a mixed liquid, adding half-weight mixed liquid to the powder mixing machine, stirring and mixing to obtain a mixed powder; after stirring for 15 minutes, discharging the mixed powder whose total amount is about 20% from an outlet portion at the bottom of the powder mixing machine; uniformly adding a metal powder with the weight to the powder mixing machine from the inlet portion of the powder mixing machine, then adding the mixed powder in the step 3 from the inlet portion of the powder mixing machine, and finally adding the remaining half-weight mixed liquid; and mixing again, and stirring for 15 minutes to complete an entire powder mixing process. Material mixing is uniform, and discharge platform and capacity uniformity is good.

Description

technical field [0001] The invention relates to the technical field of a lithium-thionyl chloride battery, more specifically, it relates to a lithium-thionyl chloride battery positive electrode and a powder method. Background technique [0002] Lithium thionyl chloride (Li / SOCl2) battery is the battery with the highest specific energy in the practical application battery series, and the specific energy can reach 590W·h / kg and 1100 (Wh / dm3). At the same time, it has the advantage of long storage life, and is currently widely used in various smart instruments, meters and some smart homes. The positive carrier is a porous structure carrier made of acetylene black and metal powder mixed with polytetrafluoroethylene as a binder. The traditional mixing method is to first pour all the acetylene black and metal powder into the mixing machine for mixing, then mix the liquid with PTFE emulsion, and finally mix and discharge. In this method, because the density of acetylene black and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66
CPCY02E60/10
Inventor 柳鸣翔陈林杨全喻赤平夏润胡凯旋
Owner 武汉昊诚锂电科技股份有限公司
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