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Lithium secondary battery and electrodes for use therein

A technology of electrodes and ion batteries, applied in the field of rechargeable lithium secondary batteries

Inactive Publication Date: 2012-08-15
科莱恩制造(德国)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] On the other hand, however, lithium metal phosphate electrodes for lithium secondary batteries in the prior art show poor rate performance, so their The capacity under is far from the rated capacity

Method used

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  • Lithium secondary battery and electrodes for use therein
  • Lithium secondary battery and electrodes for use therein
  • Lithium secondary battery and electrodes for use therein

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Embodiment Construction

[0049] LiFePO 4 (and its doped derivatives) have an olivine structure in the space group Pnma (No. 62) with set 1 (a=10.332 , b=6.010 , c=4.694 ). Obtain LiFePO from Süd-Chemie AG, Germany 4 particles. One sample consisted primarily of powder particles of mostly irregular shape (sample 232) and the other sample (sample 219) consisted of platelet-like particles.

[0050] In the present invention, the intensity ratio of two selected perpendicular peaks is determined by the selection of the signal assigned to the (020) crystal plane, which is the (301) plane. It is found that the (020) crystal plane always overlaps with the (211) plane, so the (211) plane is also considered when calculating the intensity ratio of the (020) plane.

[0051] X-ray diffraction (XRD) measurements were done on a Philips X'pert PW 3050 instrument with CuKα radiation (30 kV, 30 mA) acquired by graphite monochromator and variable slit.

[0052] When measuring electrode foils (substrate + particl...

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Abstract

The present invention relates to a positive electrode for a rechargeable lithium ion battery comprised of single particles containing a compound of the formula LiMPO4, whereby M is a metal selected from the group consisting of Co, Ni, Mn, Fe, Ti or combinations thereof, and whereby in a X-Ray diffraction chart of the electrode the ratio of the intensity I1:I2 of two selected peaks (1) and (2) is larger than (9:1) and wherein I1 represents essentially the intensity of peak (1) assigned to the (020) plane and I2 represents the intensity of peak (2) assigned to the (301) plane. The invention relates further to a process for the manufacture of such a positive electrode and to a battery comprising such an electrode.

Description

technical field [0001] The present invention relates to a rechargeable lithium secondary battery, and a process for manufacturing an electrode for the lithium secondary battery. Background technique [0002] The application of rechargeable lithium batteries has been increasing in recent years. The possibility to miniaturize the device makes it particularly attractive for a variety of applications, especially in the field of portable devices. In addition, it is being actively discussed for future applications, especially emerging high-energy applications such as portable machine tools, hybrid electric vehicles, etc. [0003] Rechargeable lithium batteries are now used as anodes such as graphite materials into which lithium or even lithium metal is reversibly inserted. As the cathode host material, layered or framework transition metal oxides are commonly used, such as LiCoO 2 or LiMn 2 o 4 (See US 4959281 to Nishi et al.). Goodenough et al. (US 5910382, US 6391493 and U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/52H01M4/02H01M4/136H01M4/1397H01M10/0525H01M10/36
CPCY02E60/122H01M4/5825H01M4/625Y02T10/7011H01M2004/021H01M4/366H01M4/1397H01M4/136H01M10/0525Y10T428/2982Y02E60/10
Inventor G·努斯普尔C·沃格勒虞有为堂上和范井上尊夫C·菲策克W·魏丹茨
Owner 科莱恩制造(德国)股份有限公司