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Negative active material, negative electrode, lithium battery and method for manufacturing the negative active material

一种负极活性物质、负极的技术，应用在活性物质电极、电极制造、电池电极等方向，能够解决体积膨胀、容量劣化等问题

Active Publication Date: 2015-07-29
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, capacity deteriorates due to volume expansion during charge and discharge

Method used

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  • Negative active material, negative electrode, lithium battery and method for manufacturing the negative active material
  • Negative active material, negative electrode, lithium battery and method for manufacturing the negative active material
  • Negative active material, negative electrode, lithium battery and method for manufacturing the negative active material

Examples

Experimental program
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Effect test

example 1

[0111] Except that Fe was further added to the alloy mixture and the proportions of Si, Ti, Ni and Fe used to prepare the master alloy were 69.5at%:10.25at%:10.25at%:10at%, in the same manner as in Comparative Example 1 Si alloy powder and a coin cell using the same were prepared in the same manner.

example 2

[0113] In the same manner as in Comparative Example 1, except that Fe was further added to the alloy mixture and the ratio of Si, Ti, Ni, and Fe used to prepare the master alloy was 69at%:11at%:11at%:9at%. To prepare Si alloy powder and coin battery using it.

example 3

[0115] In the same manner as in Comparative Example 1, except that Fe was further added to the alloy mixture and the ratio of Si, Ti, Ni, and Fe used to prepare the master alloy was 69 at %: 11.5 at %: 11.5 at %: 8 at % way to prepare Si alloy powders and coin batteries using them.

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Abstract

A negative active material, a negative electrode, a lithium battery including the negative active material, and a method of manufacturing the negative active material, the negative electrode, and the lithium battery. The negative active material includes a silicon-based alloy including Si, Ti, Ni, and Fe components. The silicon-based alloy includes a Ti2Ni phase as an inactive phase and active silicon having a lower content than that of typical silicon-based alloys. The negative active material may improve discharge capacity and lifetime characteristics of lithium batteries.

Description

[0001] This application claims priority and benefit from Korean Patent Application No. 10-2014-0009937 filed in the Korean Intellectual Property Office on January 27, 2014, the entire contents of which are hereby incorporated by reference. technical field [0002] One or more embodiments of the present invention relate to a negative active material, a negative electrode, a lithium battery including the negative active material, and a method of manufacturing the negative active material. Background technique [0003] Lithium secondary batteries generate electrical energy through oxidation and reduction reactions that occur when lithium ions are intercalated into and deintercalated from positive and negative electrodes (both including active materials capable of intercalating and deintercalating lithium ions), among which, for example , organic electrolyte solution or polymer electrolyte solution between the positive and negative electrodes. [0004] For example, in negative e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/134H01M10/0525
CPCB22F9/04H01M4/622H01M4/0485H01M2004/027H01M4/0404H01M4/386C22C1/00H01M10/052H01M4/0488H01M4/0483Y02E60/10Y02P70/50Y02T10/70
Inventor 权昇旭金哉赫徐淳星秋希姈郑昶义朴燿翰尤里·马图拉维奇李天珪
Owner SAMSUNG SDI CO LTD
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