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Negative electrode active material for storage devices

A technology of negative active material and accumulator, which is applied in the direction of active material electrode, hybrid capacitor electrode, hybrid capacitor electrolyte, etc., can solve the problems of severe collapse of negative active material, large volume change, and decreased cycle characteristics, and achieve low working potential, Effect of suppressing volume change and realizing lower voltage

Active Publication Date: 2021-04-06
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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 generated during the intercalation and deintercalation reactions of lithium ions and sodium ions is large, so there is a problem with repeated charge and discharge. However, the collapse of the active material of the negative electrode is severe, and it is easy to cause the problem of degradation of cycle characteristics.

Method used

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  • Negative electrode active material for storage devices
  • Negative electrode active material for storage devices
  • Negative electrode active material for storage devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0089] Hereinafter, examples applied to secondary batteries using non-aqueous electrolytes and solid electrolytes will be described as examples of the negative electrode active material for electrical storage devices of the present invention, but the present invention is not limited to these examples.

[0090] Secondary batteries using non-aqueous electrolytes

[0091] Tables 1 to 14 show examples (No. 1 to 86) and comparative examples (No. 87, 88) of the present invention.

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[0120] (1) Preparation of negative electrode active mate...

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Abstract

The present invention provides a negative electrode active material for an electrical storage device that has a low operating potential, can increase the operating voltage as an electrical storage device, and has excellent cycle characteristics. The negative electrode active material for an electrical storage device is characterized by containing TiO in terms of mole % in terms of oxides. 2 1~95%, P 2 o 5 +SiO2 2 +B 2 o 3 +Al 2 o 3 +R'O (R' is at least one selected from Mg, Ca, Sr, Ba and Zn) 5 to 75%, and contains more than 10% by mass of the amorphous phase.

Description

technical field [0001] The invention relates to a negative electrode active material used in electrical storage devices such as lithium ion secondary batteries, sodium ion secondary batteries, and hybrid capacitors used in portable electronic equipment, electric vehicles, electric tools, and emergency power supplies. Background technique [0002] In recent years, along with the popularization of portable electronic devices and electric vehicles, etc., the development of power storage devices such as lithium-ion secondary batteries and sodium-ion secondary batteries has been promoted. Materials containing Si or Sn having a high theoretical capacity are being studied as negative electrode active materials used in electricity storage devices. 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 generated during the intercalation and deintercalat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01G11/06H01G11/46H01M4/36H01M10/052H01M10/054
CPCH01G11/06H01G11/46H01G11/50H01G11/62H01G11/84H01M4/483H01M4/5805H01M4/5825H01M10/0525H01M10/054H01M2004/027Y02E60/10Y02T10/70H01M4/48Y02E60/13
Inventor 山内英郎
Owner NIPPON ELECTRIC GLASS CO LTD
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