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Negative electrode active material for power storage device

一种负极活性物质、蓄电器的技术，应用在活性物质电极、混合电容器电极、负电极等方向，能够解决负极活性物质崩溃激烈、体积变化大、循环特性降低等问题，达到工作电压大、循环特性优异、工作电位低的效果

Active Publication Date: 2018-04-17
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using a negative electrode active material containing Si or Sn, the volume change due to the expansion and contraction of the negative electrode active material that occurs during the intercalation and deintercalation reactions of lithium ions and sodium ions is large. The breakdown of the negative electrode active material due to discharge is severe, and it is easy to cause a problem that the cycle characteristics are lowered

Method used

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  • Negative electrode active material for power storage device
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  • Negative electrode active material for power storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0095] Hereinafter, as an example of the negative electrode active material for an electrical storage device of the present invention, examples applicable to secondary batteries using non-aqueous electrolytes and solid electrolytes will be described, but the present invention is not limited to these examples.

[0096] Secondary battery using non-aqueous electrolyte

[0097] Tables 1 to 7 show examples (No. 1 to 33) and comparative examples (No. 34, 35) of the present invention.

[0098] [Table 1]

[0099]

[0100] [Table 2]

[0101]

[0102] [table 3]

[0103]

[0104] [Table 4]

[0105]

[0106] [table 5]

[0107]

[0108] [Table 6]

[0109]

[0110] [Table 7]

[0111]

[0112] (1) Production of negative electrode active material

[0113] Samples of Nos. 1 to 33 and 35 were produced as follows. Using various oxides, carbonate raw materials, etc. as raw materials, raw material powders were prepared so as to have the composition described in the table. The raw material powder was put into a...

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Abstract

The present invention provides a negative electrode active material for a power storage device, wherein the negative electrode active material has a low operating potential, can enable a higher operating voltage for a power storage device, and has excellent cycle characteristics. This negative electrode active material for a power storage device is characterized by containing at least one elementselected from among Si, B, and P, and also containing Nb and O.

Description

Technical field [0001] The present invention relates to a negative electrode active material used in storage devices such as lithium ion secondary batteries, sodium ion secondary batteries, hybrid capacitors, etc., used in portable electronic equipment, electric vehicles, power tools, emergency power supplies for backlights, and the like. Background technique [0002] In recent years, with the spread of portable electronic devices, electric vehicles, etc., the development of power storage devices such as lithium ion secondary batteries and sodium ion secondary batteries has been progressing. As a negative electrode active material used in an electricity storage device, materials containing Si or Sn with a high theoretical capacity are being studied. However, in the case of using a negative electrode active material containing Si or Sn, the volume change caused by the expansion and contraction of the negative electrode active material that occurs during the intercalation and deint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M10/054H01G11/06H01G11/30H01M4/36H01M4/485
CPCH01G11/06H01G11/30H01G11/46H01M4/136H01M4/5825Y02T10/70Y02E60/10H01M10/054H01M4/133H01M4/134H01M4/386H01M4/583H01M4/621H01M10/0525H01M10/0567H01M10/0569H01M2004/027H01M2004/028
Inventor 山内英郎
Owner NIPPON ELECTRIC GLASS CO LTD
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