Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries

一种负极活性物质、锂二次电池的技术，应用在二次电池、电池电极、电池等方向，能够解决输出特性不能充分地实用化等问题，达到性能平衡性优良、提高输出特性的效果

Inactive Publication Date: 2012-04-25
NIPPON STEEL CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] For example, Patent Document 6 discloses an anode material obtained by adding a phosphorus compound to an organic material or a carbonaceous material and carbonizing it, and Patent Document 7 discloses graphitizing a carbon material containing boron and silicon. The obtained negative electrode materials, however, are not yet fully practical in terms of output characteristics and the like in automotive applications such as HEVs, as described above.

Method used

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  • Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries
  • Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries
  • Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries

Examples

Experimental program
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Embodiment 1

[0053] Using pitch purified from coal-based heavy oil by removing quinoline-insoluble components, heat treatment at 500°C for 24 hours by the delayed coking method to produce lump coke (green coke), and use a jet mill Fine pulverization and sizing were carried out to obtain green coke powder with an average particle diameter of 9.9 μm.

[0054] Through a rotary kiln, the lump-shaped raw coke obtained as above is heat-treated at a temperature from 700° C. near the inlet to 1500° C. (the highest reaching temperature) near the outlet for more than 1 hour to obtain lump-shaped roasted coke. Fine pulverization and sizing were carried out with a jet mill to obtain calcined coke powder with an average particle diameter of 9.5 μm.

[0055] With respect to 70 parts by weight of green coke powder and 30 parts by weight of roasted coke powder (100 parts by weight of coke material) obtained as described above, phosphoric acid ester (14 mass % active phosphorus solid resin: manufactured by...

Embodiment 2~4

[0060] In Example 1, the mixing ratio of green coke powder and roasted coke powder was changed from 70:30 by weight to 50:50 (Example 2), 40:60 (Example 3) and 30:70 (Example 3) respectively. Example 4), except that, the same operation as in Example 1 was performed to obtain a negative electrode active material for a lithium secondary battery. The results are shown in Table 1.

reference example 1

[0062] Except having used the coke material of 100 weight part of green coke powder (no roasted coke powder was mixed), the same operation as Example 1 was performed, and the negative electrode active material for lithium secondary batteries was obtained. The results are shown in Table 1.

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Abstract

Green coke from coal and / or petroleum and calcined coke from coal and / or petroleum are blended using a weight ratio between 90:10 and 10:90, and for each 100 parts by weight of the resulting coke blend, 0.1 to 6.0 parts by weight of a phosphor compound and 0.1 to 6.0 parts by weight of a boron compound are added, with weights calculated in terms of elemental phosphor / boron equivalent. The resulting coke material is fired to produce a novel anode active material for lithium secondary batteries, said anode active material having stable charging / discharging characteristics and excellent output characteristics, initial efficiency, and capacity retention rate.

Description

technical field [0001] The present invention relates to a negative electrode active material for a lithium secondary battery, a negative electrode for a lithium secondary battery, a vehicle-mounted lithium secondary battery using the same, and a method for producing a negative electrode active material for a lithium secondary battery. Background technique [0002] Compared with other secondary batteries, lithium secondary batteries have high energy density, so they can be miniaturized / lightened, and are often used as mobile electronic devices such as mobile phones, personal computers, portable information terminals (PDA: Personal Digital Assistant) and portable cameras. It is expected that this demand will become higher and higher in the future. [0003] In addition, in order to cope with energy issues and environmental issues, electric vehicles and hybrid electric vehicles (HEV: Hybrid Electric Vehicles) that combine electric motors driven by nickel-metal hydride batteries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587H01M4/133H01M4/62
CPCY02E60/12Y02E60/122H01M4/587H01M4/622Y02T10/7011H01M10/0525H01M4/623Y02E60/10H01M4/133H01M2220/20Y02P70/50Y02T10/70
Inventor 池田大佐田川和树川野阳一
Owner NIPPON STEEL CHEMICAL CO LTD
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