Negative electrode active material for power storage device

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. It can solve the problems of cycle characteristics degradation, large volume change, and severe collapse of negative active material, etc., and achieve low voltage , Inhibition of volume change and low working potential

Active Publication Date: 2018-03-27
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 caused by the expansion and contraction of the negative electrode active material generated during the intercalation and deintercalation reactions of

Method used

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

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 a power storage device, wherein the negative electrode active material has a low operating potential, can have an increased 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, by mol% in terms of oxide, 1-95% of TiO2 and 5-75% of P2O5+SiO2+B2O3+Al2O3+R'O (R' represents at least one selected from among Mg, Ca, Sr, Ba and Zn), and also containing 10 mass% or more of amorphous phases.

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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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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