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Lithium metal dispersion in electrodes

A technology of lithium metal and lithium metal powder, which is applied in the field of secondary batteries and can solve problems such as small capacity

Inactive Publication Date: 2006-09-06
ФМК ЛИТИУМ ЮЭСЭЙ КОРП.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in Li-ion batteries having a smaller capacity compared to the initial charge, as part of the Li is consumed due to the formation of the SEI

Method used

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  • Lithium metal dispersion in electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Example 1 - Ethylene Propylene Diene Terpolymer and Cyclohexane

[0078] The test involved cyclohexane, lithium powder and ethylene propylene diene terpolymer (Nordel  IP4570) thermal stability of the coating solution in the temperature range of interest. The solution consisted of 8.8 ml cyclohexane, 0.24 g lithium powder and 0.127 g ethylene propylene diene terpolymer. Use the reaction system screening tool as the calorimeter of choice. In the tests, the pressure inside the chamber was set at 200 psig using argon to allow the system to be tested beyond the boiling point of cyclohexane. No self-heating was detected in the temperature range of 19°C-94°C. The plot of the experiment is plotted in figure 2 middle. Cyclohexane has a boiling point of 80.7°C at 1 atm, so detection above this temperature is unnecessary, and the test was stopped at 94°C. Such as figure 2 As shown, during the ramp, the instrument maintains a steady-state heating rate of 0.5°C / min. If s...

Embodiment 2

[0079] Example 2 - Lithium powder and p-xylene

[0080] An amount of 0.531 g of lithium powder was mixed with 8 ml of p-xylene, and a thermal stability test was performed using the reaction system screening tool described in Example 1. Tests were performed between room temperature and 180°C. No self-heating was detected in this temperature range, implying that the lithium powder is stable in p-xylene between room temperature and 180 °C.

Embodiment 3- 2

[0081] Example 3 - Dimethylpropylene Urea and Lithium Powder

[0082] The thermal stability of the solution containing dimethylpropylene urea and lithium powder was tested using the same reaction system screening tool technique as described in Example 1 with the apparatus and procedure. Addition of dimethylpropylene urea to the lithium powder self-heating was detected within 3 seconds at a temperature of 25 °C. Self-heating increases at a rate of over 1000°C / min. image 3 The thermal runaway of the experiment is shown graphically. The presence of self-heating in the system suggests that dimethylpropylene urea is not a suitable solvent to form the anode of the present invention because it reacts with the lithium powder.

[0083] In another anode 14 production process, lithium metal may be provided in anode 14 by impregnating matrix material 24 in a suspension comprising lithium metal in a non-aqueous liquid such as a hydrocarbon solvent (eg, hexane). The lithium metal 26 use...

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Abstract

Electrodes, such as anodes and cathodes, can include a host material that is prelithiated or undergoes lithiation upon electrolyte introduction into a battery. Lithiation of the host material can occur by the agitation of lithium metal and a host material, the agitation of a lithium metal powder and a host material at a temperature greater than room temperature, the application of pressure to a lithium metal and host material mixture, contact of the host material with molten lithium metal, the lamination of lithium foil or lithium mesh onto an electrode containing the host material, or by lamination of lithium metal or mesh onto an electrode at elevated temperatures.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of the following U.S. patent applications, which are incorporated herein by reference in their entirety: U.S. Patent Application, filed July 28, 2004, entitled "LITHUM METAL DISPERSION INELECTRODES"; U.S. Provisional Application, filed July 29, 2003 No. 60 / 490685; and U.S. Provisional Application No. 60 / 491513, filed July 31, 2003. field of invention [0003] The present invention relates to a secondary battery having a high specific capacity, and more particularly to an electrode comprising a matrix material and lithium metal dispersed in the matrix material. Background of the invention [0004] Lithium and lithium ion secondary or rechargeable batteries have been used in certain applications such as in cellular telephones, camcorders and laptop computers, and even more recently, in high power applications such as in electric and hybrid vehicles. In these applications, it is prefer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/00H01M4/13H01M4/133H01M4/134H01M4/139H01M4/1393H01M4/1395H01M4/40H01M4/58H01M4/587H01M10/0525H01M10/36
CPCY02E60/122H01M4/134H01M4/0435H01M4/043H01M4/1395H01M10/0525H01M4/133H01M4/1393H01M4/0471Y02T10/7011H01M4/587H01M4/139H01M4/13Y02E60/12Y02E60/10Y02T10/70
Inventor Y·高M·亚科夫莱瓦J·恩格尔C·贾维斯M·莱因
Owner ФМК ЛИТИУМ ЮЭСЭЙ КОРП.
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