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Method for preparing lithium manganate positive electrode material by using waste zinc-manganese dry battery

A zinc-manganese dry battery and cathode material technology, applied in battery electrodes, battery recycling, recycling technology and other directions, can solve the problems of complex process and high recycling cost, and achieve the effect of simple operation process, easy control, and improved resource utilization.

Active Publication Date: 2014-04-23
甘肃大象能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods only separate and purify metal elements such as zinc, iron, and manganese in electrode materials into basic chemical raw materials, and do not process them for specific application requirements.
And the process is complex and the recycling cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing lithium manganese oxide cathode material by utilizing waste zinc-manganese dry batteries, comprising the steps of:

[0037] (1) Sorting out the black substances (cathode material, electrolyte paste and carbon rod) in the waste zinc-manganese dry batteries, and placing them in a horizontal disc jet mill for grading treatment to obtain micron-sized black substances, which are cleaned and dried to obtain zinc Manganese raw material, spare;

[0038] (2) The EDTA volumetric method is used to measure the zinc element in the zinc-manganese raw material, and the ferrous ammonium sulfate standard solution is used to measure the manganese element in the zinc-manganese raw material. The results show that the molar ratio of manganese and zinc elements in the zinc-manganese raw material is Mn:Zn =1.356:0.644;

[0039] (3) According to the molar ratio of Li:(Mn+Zn)=1:2, mix the zinc-manganese raw material and lithium raw material Li as described in step (1) 2...

Embodiment 2

[0042] A method for preparing lithium manganese oxide cathode material by utilizing waste zinc-manganese dry batteries, comprising the steps of:

[0043] (1) Sorting out the black substances in the waste zinc-manganese dry batteries, placing them in a horizontal disc jet mill for grading treatment, obtaining micron-sized black substances, cleaning and drying to obtain zinc-manganese raw materials, and set aside;

[0044] (2) The EDTA volumetric method is used to measure the zinc element in the zinc-manganese raw material, and the ferrous ammonium sulfate standard solution is used to measure the manganese element in the zinc-manganese raw material. The results show that the molar ratio of manganese and zinc elements in the zinc-manganese raw material is Mn:Zn =1.342:0.658;

[0045] (3) Mix the zinc-manganese raw material and lithium raw material LiOH described in step (1) according to the molar ratio of Li:(Mn+Zn)=1:2, and fully mix and grind them in a planetary ball mill until...

Embodiment 3

[0048] A method for preparing lithium manganese oxide cathode material by utilizing waste zinc-manganese dry batteries, comprising the steps of:

[0049] (1) Sorting out the black substances in the waste zinc-manganese dry batteries, placing them in a horizontal disc jet mill for grading treatment, obtaining micron-sized black substances, cleaning and drying to obtain zinc-manganese raw materials, and set aside;

[0050] (2) The EDTA volumetric method is used to measure the zinc element in the zinc-manganese raw material, and the ferrous ammonium sulfate standard solution is used to measure the manganese element in the zinc-manganese raw material. The results show that the molar ratio of manganese and zinc elements in the zinc-manganese raw material is Mn:Zn =1.333:0.667;

[0051] (3) According to the molar ratio of Li:(Mn+Zn)=1:2, mix the zinc-manganese raw material and lithium raw material Li as described in step (1) 2 C 2 o 4 , and fully mixed and ground in a planetary b...

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PUM

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Abstract

The present invention relates to a method for preparing a lithium manganate positive electrode material by using a waste zinc-manganese dry battery. The method comprises: (1) taking a zinc-manganese dry battery black substance, and carrying out grinding, washing and drying to obtain a zinc-manganese raw material so as to be spare; (2) respectively determining zinc content and manganese content in the zinc-manganese raw material in the step (1); (3) mixing the zinc-manganese raw material and a lithium raw material, grinding, and drying to obtain a lithium-zinc-manganese mixture; and (4) carrying out heating calcinations on the lithium-zinc-manganese mixture obtained in the step (3) to carry out a high temperature solid phase reaction, cooling to a room temperature after completing the reaction, grinding, and screening to obtain the lithium manganate positive electrode material. According to the present invention, the method for preparing the lithium manganate positive electrode material by using the waste zinc-manganese dry battery is created, such that comprehensive recovery of the zinc element and the manganese element in the waste zinc-manganese dry battery is achieved, preparation of the doped LiMn2-xZnxO4 positive electrode material is achieved, the resource utilization rate is increased, and the secondary pollution is eliminated.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical power source materials, specifically relates to a lithium manganate positive electrode material and a preparation method thereof, and further relates to a method of preparing doped LiMn by recycling zinc and manganese from discarded zinc-manganese dry batteries 2-x Zn x o 4 methods for cathode materials. Background technique [0002] The acid zinc-manganese dry battery uses a zinc cylinder as the negative electrode, and is treated with amalgamation to make the surface properties more uniform, so as to reduce the corrosion of zinc and improve the storage performance of the battery. The positive electrode material is made of manganese dioxide powder, ammonium chloride and A mixed paste consisting of carbon black. A carbon rod is inserted in the middle of the positive electrode material as a conductor for drawing current. There is a layer of reinforced separator paper betwe...

Claims

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Application Information

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IPC IPC(8): H01M6/52H01M4/505
CPCY02E60/122Y02W30/84H01M6/52H01M4/505
Inventor 罗绍华李辉田勇胡平朱来东李革兰诸葛福长
Owner 甘肃大象能源科技有限公司
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