Unlock instant, AI-driven research and patent intelligence for your innovation.

Secondary battery of improved life characteristics

A lithium secondary battery and battery technology, applied in secondary batteries, lithium batteries, battery electrodes, etc., can solve the problem that the battery cannot fully realize its functions

Active Publication Date: 2008-10-29
LG ENERGY SOLUTION LTD
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, mixing a large amount of metal impurities will cause the battery to not fully realize its function

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Ferrous (II) perchlorate (Fe(ClO 4 ) 2 ·xH 2O) dissolved in a solution (1:2, v / v) of ethylene carbonate (EC) and ethylmethyl carbonate (EMC) in which 1M LiPF was dissolved 6 , which is an electrolyte for a lithium secondary battery, whereby a solution containing 500 ppm iron was prepared. Diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ) was added to the thus-prepared electrolyte, followed by standing at room temperature for 24 hours, and the Fe concentration was measured with an inductively coupled plasma-atomic emission spectrometer (ICP-AES). The results are shown in Table 1 below.

Embodiment 2

[0049] Experiment with the method identical with embodiment 1, except ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) instead of diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ). The experimental results are shown in Table 1 below.

Embodiment 3

[0051] Experiment with the method identical with embodiment 1, except lithium phosphate (Li 3 PO 4 ) instead of diammonium hydrogen phosphate ((NH 4 ) 2 HPO 4 ). The experimental results are shown in Table 1 below.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

Disclosed herein is a lithium secondary battery including a phosphate compound, wherein metal ion impurities incorporated during a fabrication process of the battery are precipitated to thereby prevent electrodeposition of the metal ions on an anode, through the addition of one or more phosphates of Formula I to an electrode, an electrolyte or the surface of a separator: (I) wherein, A is Li, Na or NH4; and 0 H01M 4 / 02 0 13 2 2006 / 10 / 16 101297418 2008 / 10 / 29 000000000 LG Chemical Ltd. Korea Ryu Ji Heon Lee Eun Ju Lee Jaepil Hyun Jung Eun Choi Jeong Hee Kim Min Su Shin Youngjoon liangxiao an lujin hua 11219 Korea 2005 / 10 / 26 10-2005-0101016 2008 / 4 / 25 PCT / KR2006 / 004160 2006 / 10 / 16 WO2007 / 049871 2007 / 5 / 3 English

Description

technical field [0001] The present invention relates to a lithium secondary battery having improved life characteristics. Specifically, the present invention relates to a lithium secondary battery having improved life characteristics, wherein by adding a phosphate salt as shown in formula I (which will be described below) to the surface of an electrode active material, an electrolyte, or a separator, during battery assembly The metal ion impurities mixed in are precipitated and separated, thus preventing the metal ions from being electrodeposited on the anode, thereby improving the life characteristics of the battery. Background technique [0002] Due to the rapid expansion of the use of portable electronic devices such as mobile phones, notebook computers, camcorders, digital cameras, etc., there has been an increased demand for secondary batteries with high energy density as power sources for these electronic devices. In recent years, application of secondary batteries as...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/58H01M10/052H01M10/058H01M10/36H01M50/451H01M50/454H01M50/489H01M50/491
CPCH01M2/1686Y02E60/122H01M10/058H01M4/02H01M10/052H01M4/62H01M10/4235H01M10/0567H01M2004/021Y02E60/10Y02P70/50H01M50/491H01M50/489H01M50/451H01M50/454H01M4/13
Inventor 柳志宪李恩周李在弼玄晶银崔政熙金旻修申荣埈
Owner LG ENERGY SOLUTION LTD