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Battery composite positive electrode and electrochemical battery composed thereof

A composite positive electrode and electrochemical technology, applied in the field of electrochemistry, can solve problems such as the discharge curve is too flat, and achieve the effect of easy management

Active Publication Date: 2022-01-04
BEIJING LIKAIYUAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a battery composite positive electrode, which solves the defect that the discharge curve of the existing lithium iron phosphate battery is too flat, and provides the lithium iron phosphate battery with a discharge "end point indication function"

Method used

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  • Battery composite positive electrode and electrochemical battery composed thereof
  • Battery composite positive electrode and electrochemical battery composed thereof
  • Battery composite positive electrode and electrochemical battery composed thereof

Examples

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Embodiment 1

[0021] This embodiment provides a composite positive electrode for a battery, which includes lithium iron manganese phosphate LiFe 1-x mn x PO 4 , titanium disulfide TiS 2 .

[0022] Specifically, lithium iron manganese phosphate LiFe 1-x mn x PO 4 with the titanium disulfide TiS 2 The mass percentage is: (98:2)~(95:5).

[0023] This embodiment also provides an electrochemical cell, including a negative electrode, an electrolyte, and a positive electrode, the positive electrode is the composite positive electrode of this embodiment, and the positive electrode includes lithium iron manganese phosphate LiFe 1-x mn x PO 4 , titanium disulfide TiS 2 . The negative pole is an active metal negative pole; the electrolyte is a liquid phase organic electrolyte.

[0024] Specifically, the active metal includes lithium.

[0025] Specifically, lithium iron manganese phosphate LiFe 1-x mn x PO 4 , titanium disulfide TiS 2 Mixed at a mass ratio of 96:4, using conductive car...

Embodiment 2

[0030] This embodiment provides a composite positive electrode for a battery, which includes lithium iron manganese phosphate LiFe 1-x mn x PO 4 , lithium vanadium phosphate Li 3 V 2 (PO 4 ) 3 , titanium disulfide TiS 2 .

[0031] Specifically, lithium iron manganese phosphate LiFe 1-x mn x PO 4 and lithium vanadium phosphate Li 3 V 2 (PO 4 ) 3 The sum of the masses and the titanium disulfide TiS 2 The mass percentage is: (98:2)~(95:5).

[0032] This embodiment also provides an electrochemical cell, including a negative electrode, an electrolyte, and a positive electrode, the positive electrode is the composite positive electrode of this embodiment, and the positive electrode includes lithium iron manganese phosphate LiFe 1-x mn x PO 4 , lithium vanadium phosphate Li 3 V 2 (PO 4 ) 3 , Titanium disulfide. The negative pole is an active metal negative pole; the electrolyte is a liquid phase organic electrolyte.

[0033] Specifically, lithium iron manganese...

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Abstract

The invention provides a battery composite positive electrode and an electrochemical battery composed thereof, the composite positive electrode includes lithium iron manganese phosphate LiFe 1‑ x mn x PO 4 , titanium disulfide TiS 2 , the addition of a small amount of titanium disulfide provides the function of "discharge end indication" and solves the problem of lithium iron manganese phosphate LiFe 1‑x mn x PO 4 The voltage is flat during the discharge process, and the curve bends downward only when the end discharge voltage is approaching. There is no obvious characteristic problem when reaching the end discharge voltage, and the control of the end discharge voltage is realized.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a composite positive electrode of a battery and an electrochemical battery composed of the same. Background technique [0002] The latest generation of medical devices has requirements such as high energy rates for power supplies. Power sources (electrochemical cells, batteries or batteries) for medical and other applications, such as batteries with manganese dioxide as the cathode material. This type of battery has initially met the demand, and shows a voltage curve that gradually drops slowly when applied at a low rate. When applied at a high rate, the gradual and slow discharge curve disappears, showing a tendency to become a discharge curve with a sharp drop in the terminal voltage of the battery. figure 1 It is a type of lithium iron phosphate power battery (capacity 1100mAh) with a model of STL18650 and discharge characteristics at different rates. Five differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/42C01B25/26C01B25/45C01B25/37
CPCY02E60/10
Inventor 熊宇迪
Owner BEIJING LIKAIYUAN TECH
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