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Lithium secondary battery and manufacturing method thereof

A lithium secondary battery and electrolyte technology, applied in secondary battery, electrolyte storage battery manufacturing, lithium storage battery, etc.

Pending Publication Date: 2020-06-05
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, lithium secondary batteries using Ni, Co, and Mn-based cathode materials and graphite-based anode materials have been developed, but there are still many attempts to develop alternative materials to improve energy density.

Method used

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  • Lithium secondary battery and manufacturing method thereof
  • Lithium secondary battery and manufacturing method thereof
  • Lithium secondary battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: First Exemplary Embodiment

[0056] The first exemplary embodiment uses Li 2 CO 3 , Mn 2 o 3 (by calcining MnCO 3 Synthesis), TiO 2 and Mo 2 o 5 Perform ball milling with absolute ethanol solvent. According to a first exemplary embodiment, according to Li 1.2 [(Mn 0.4 Ti 0.4 ) 0.95 Mo 0.05 ]O 2 The composition of the additive material. For ball milling, a 5 g amount of 10 mm size ZrO was introduced 2 Ball, ZrO of 5mm size for 10g 2 Balls and 4g of 1mm size ZrO 2 ball. Ball milling was carried out in 17 groups, each time at a speed of 300 rpm for 15 minutes. After ball milling, the cathode active material was washed with ethanol, dried and pelletized. Then, the cathode active material was calcined at a temperature of 900° C. for 12 hours in an Ar atmosphere, thereby obtaining cathode active material powder.

Embodiment 2

[0057] Example 2: Second Exemplary Embodiment

[0058] A cathode active material powder was obtained in the same manner as in Example 1, except that molybdenum had a ratio of 0.1, thereby obtaining Li 1.2 [(Mn 0.4 Ti 0.4 ) 0.9 Mo 0.1 ]O 2 .

Embodiment 3

[0059] Example 3: Third Exemplary Embodiment

[0060] A cathode active material powder was obtained in the same manner as in the first exemplary embodiment except that an excess amount of lithium was added in an amount of 3% by weight.

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Abstract

Provided are a lithium secondary battery and a manufacturing method thereof. The lithium secondary battery has the improved the electrochemical characteristics through the improvement of the structural stability by including a cathode active material doped with molybdenum (Mo). The lithium secondary battery includes a cathode; an anode; a separator positioned between the cathode and the anode; andan electrolyte. In particular, the cathode active material includes molybdenum (Mo) doped in a composite oxide of lithium and metal including manganese (Mn) and titanium (Ti).

Description

technical field [0001] The invention relates to a lithium secondary battery. Background technique [0002] In the related art, lithium secondary batteries including electroactive materials have higher operating voltage and higher energy density than lead batteries or nickel / cadmium batteries. Therefore, lithium secondary batteries have been used as energy storage devices for electric vehicles (EV) and hybrid electric vehicles (HEV). [0003] In order to increase the range of electric vehicles, energy densification of batteries is required, and thus the energy density of materials needs to be increased. For example, lithium secondary batteries using Ni, Co, and Mn-based cathode materials and graphite-based anode materials have been developed, but there are still many attempts to develop alternative materials to improve energy density. Contents of the invention [0004] In a preferred aspect, there is provided a lithium secondary battery having improved electrochemical cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0525H01M4/36H01M4/48H01M4/485H01M4/525H01M4/505
CPCH01M10/058H01M10/0525H01M4/362H01M4/48H01M4/485H01M4/525H01M4/505Y02E60/10Y02T10/70H01M2220/20H01M4/131H01M4/1391Y02P70/50H01M10/052C01G53/44B60L50/64B60K6/28B60Y2400/112H01M2004/028B60Y2200/91B60Y2200/92B60R16/033
Inventor 吴承旼高琦锡吕悦梅金东俊李尹圣李智殷金思钦明承泽
Owner HYUNDAI MOTOR CO LTD
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