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Organic sulfur material, electrode, lithium ion secondary battery and manufacturing method

A manufacturing method and organic sulfur technology, applied in electrode manufacturing, secondary batteries, lithium storage batteries, etc., can solve the problems of high price of polyacrylonitrile, difficulty in providing lithium ion secondary batteries, etc., to improve the charge and discharge capacity and improve the cycle. Features, effects with a small degree of decline

Pending Publication Date: 2021-10-22
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the positive electrode active material of Patent Document 1 has the following problems: the raw material polyacrylonitrile is expensive, especially polyacrylonitrile with stable quality is more expensive, so it is difficult to provide an inexpensive lithium ion secondary battery

Method used

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  • Organic sulfur material, electrode, lithium ion secondary battery and manufacturing method
  • Organic sulfur material, electrode, lithium ion secondary battery and manufacturing method
  • Organic sulfur material, electrode, lithium ion secondary battery and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0073] Another embodiment of the present invention is a method for producing an organic sulfur material, comprising:

[0074] (1) The process of preparing an acrylic resin,

[0075] (2) A step of modifying the acrylic resin with sulfur,

[0076] The acrylic resin is a polymer of at least one selected from the group consisting of at least one polymer selected from the group consisting of acrylate compounds represented by the above formula (1), or a polymer composed of A polymer obtained by polymerizing at least one selected from the group consisting of acrylate compounds represented by the above formula (1) and at least one selected from the group consisting of diacrylate compounds represented by the following formula (2) .

[0077] Another embodiment of the present invention is a method for manufacturing an electrode. After the organic sulfur material is manufactured by the above-mentioned manufacturing method, the following steps are also included:

[0078] (3) A step of p...

Embodiment 1

[0188]

[0189] According to the formulation in Table 2, the materials were mixed in a stirrer to obtain raw materials for firing (fired raw materials).

[0190] (reaction device)

[0191] Used for firing raw materials figure 1 The reaction apparatus 1 is shown. The reaction device 1 has: a reaction container 3 made of quartz glass with a bottomed cylindrical shape for containing the raw material 2 for firing, with an outer diameter of 60 mm, an inner diameter of 50 mm, and a height of 300 mm; The cover 4 made; 1 aluminum oxide protective tube 5 ("Alumina SSA-S" manufactured by NIKKATO Co., Ltd., 4 mm in outer diameter, 2 mm in inner diameter, and 250 mm in length) penetrating the cover 4, 2 gas inlet tubes 6 and gas Discharge pipe 7 (both "Alumina SSA-S" manufactured by NIKKATO Co., Ltd., 6 mm in outer diameter, 4 mm in inner diameter, and 150 mm in length); and an electric furnace 8 (crucible furnace, opening width Heating height 100mm).

[0192] The alumina protectio...

Embodiment 2～15 and comparative example 1～2

[0211] Except that the formulations and conditions in Table 2 and Table 3 were appropriately changed, the rest were processed in the same manner as in Example 1 to produce each firing raw material, organic sulfur material, and lithium-ion secondary battery.

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Abstract

Provided are: a novel organic sulfur material capable of improving charge / discharge capacity and cycle characteristics, a positive electrode or a negative electrode, which is an electrode containing the organic sulfur material, and a lithium ion secondary battery comprising the electrode. The organic sulfur material in which an acrylic resin is sulfur-modified is provided, the acrylic resin being a polymer obtained by polymerizing at least one type selected from the group consisting of acrylate compounds represented by CH2=C(R11)COOR12 (where R11 is a methyl group or the like and R12 is an alkyl group), or being at least one of polymers obtained by polymerizing at least one type selected from the group consisting of acrylate compounds and at least one type selected from the group consisting of diacrylate compounds represented by CH2=C(R21)COO-Y-OCO(R22)C=CH2 (where R21 and R22 are the same or different and are methyl groups and the like, and Y is a hydrocarbylene group which may have a substituent selected from among a hydroxyl group and an alkyl group, etc.).

Description

technical field [0001] The present invention relates to a novel organosulfur material, an electrode containing the organosulfur material, a lithium ion secondary battery including the electrode, and their manufacturing methods. Background technique [0002] Lithium ion secondary batteries have a large charge and discharge capacity, so they are mainly used as batteries for mobile electronic devices. In addition, even as batteries for electric vehicles, the usage of lithium-ion secondary batteries is increasing, and improvement in performance is expected. [0003] Patent Document 1 describes a positive electrode active material for a lithium ion secondary battery obtained by heating a raw material powder containing sulfur powder and polyacrylonitrile powder in a non-oxidizing atmosphere. In addition, Patent Document 2 attempts to provide a positive electrode active material at low cost by using industrial rubber. [0004] On the other hand, there are proposals to use materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M4/137H01M4/1399H01M10/0525
CPCH01M4/60H01M4/137H01M4/1399H01M10/0525H01M4/13Y02E60/10H01M4/602H01M4/139H01M10/052C08F8/34C08F220/18C08F222/10C08J9/24C01B32/70C01B17/00C01P2002/82H01M4/0471H01M4/604H01M2004/021
Inventor 中条文哉久保达也
Owner SUMITOMO RUBBER IND LTD