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Composite material for electrodes, method for producing same, and secondary battery

A composite material and secondary battery technology, applied in non-aqueous electrolyte batteries, lithium batteries, battery electrodes, etc., can solve the problems of narrowing the selection range of negative electrodes and low electron conductivity.

Active Publication Date: 2015-12-02
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since elemental sulfur has low electron conductivity and does not contain lithium (Li), lithium or an alloy containing lithium must be used in the negative electrode, and there is a problem that the selection range of the negative electrode is narrowed

Method used

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  • Composite material for electrodes, method for producing same, and secondary battery
  • Composite material for electrodes, method for producing same, and secondary battery
  • Composite material for electrodes, method for producing same, and secondary battery

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0077] 3. Example 2 (Secondary Batteries Relating to the First to Seventh Aspects of the Present Disclosure)

[0078] 4. Example 3 (variation of Example 2)

[0079] 5. Example 4 (variation of Example 3)

[0080] 6. Example 5 (another variant of Example 3)

[0081] 7. Example 6 (another variant of Example 3) and others

[0082][Explanation of overall matters relating to the electrode composite material, the method for producing the composite material, and the secondary battery of the first aspect to the seventh aspect of the present disclosure]

[0083] In the following description, the electrode composite material related to the first aspect to the seventh aspect of the present disclosure, the method for preparing the electrode composite material related to the first aspect to the seventh aspect of the present disclosure, and the first aspect related to the present disclosure The secondary batteries through the seventh aspect may be collectively referred to simply as "the p...

example 1

[0190] Example 1 relates to the composite material for electrodes and the method for preparing the composite material according to the first aspect to the seventh aspect of the present disclosure.

[0191] Specifically, the composite material for electrodes in Example 1 includes a plant-derived porous carbon material and lithium sulfide (Li sulfide) supported on pores that the porous carbon material has. x S, precondition: 0PC 0.1cm 3 / g or greater, and the pore volume MP of the electrode composite material according to the MP method 0 less than 0.1cm 3 / g (relating to the composite material for electrodes of the first aspect of the present specification). Alternatively, the pore volume MP of the electrode composite according to the MP method 0 less than 0.1cm 3 / g, and after washing with water, the pore volume MP of the electrode composite material according to the MP method 1 Greater than the pore volume MP 0 (The composite material for electrodes relating to the secon...

example 3

[0283] Example 3 is a variant of Example 2. In Example 2, the composite material for electrodes in Example 1A-2 was used. On the other hand, in Example 3, a positive electrode of a secondary battery was prepared using the composite material for electrodes (lithium sulfide porous carbon composite material) in Example 1A-3 and other materials, and a secondary battery was further prepared. Specifically, slurries with blends indicated in Table 12 below were prepared. Then, a lithium sulfide secondary battery formed from a 2016-type coin battery was assembled by the same method as used in Example 2 using the blend (cathode material and active material for the cathode) having the composition indicated in Table 12.

[0284] [Table 12] The electrode of the secondary battery in the example 3

[0285]

[0286]

[0287] As described in Table 13 below, the conditions for the charge-discharge test of the lithium sulfide secondary battery were set. At the same time, the discharge c...

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Abstract

This composite material for electrodes contains: a plant-derived porous carbon material that has a pore volume of 0.1 cm3 / gram or more as determined by an MP method, or alternatively, a pore volume of pores less than 100 nm of 0.3 cm3 / gram or more as determined by a BJH method; and lithium sulfide that is supported by the pores of the porous carbon material. This composite material for electrodes has a pore volume of less than 0.1 cm3 / gram as determined by an MP method, or alternatively, a pore volume of pores less than 100 nm of less than 0.3 cm3 / gram as determined by a BJH method.

Description

technical field [0001] The present disclosure relates to a composite material for electrodes, a method for preparing the composite material, and a secondary battery. Background technique [0002] In recent years, due to enhanced performance of portable electronic devices, hybrid vehicles, and the like, there has been an increasing demand for high capacity of secondary batteries used at one time. As far as lithium-ion secondary batteries are currently used, the capacity enhancement progress of the positive electrode is slow compared to the negative electrode, and even the lithium nickelate-based material that is considered to have a relatively high capacity has a capacity of about 190mAh / g to 220mAh / gram. On the other hand, sulfur has a theoretical capacity density as high as about 1670 mAh / gram, and sulfur is one of the best candidates for high-capacity electrode materials. However, since elemental sulfur has low electron conductivity and does not contain lithium (Li), lit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583C01B17/22C01B31/08H01M4/36
CPCC01B17/22C01B31/02C01B31/08C01P2002/72C01P2006/14C01P2006/16C01P2006/40H01M4/36H01M4/583C01B32/05C01B32/30C01B32/318H01M4/366H01M4/5815H01M4/587H01M10/052Y02E60/10Y02T10/70
Inventor 山之井俊田畑诚一郎饭田広范山田心一郎
Owner MURATA MFG CO LTD
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