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Cage structure lithium battery positive pole

A cage-shaped structure, lithium battery technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of poor heat resistance of ternary lithium batteries, affecting the normal operation of batteries, and increasing battery temperature, so as to improve the monomer Energy density, the effect of improving the energy density of the monomer, and improving the cut-off voltage

Inactive Publication Date: 2017-12-15
ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Batteries made of ternary materials are safer than lithium cobalt oxide batteries, but the voltage is too low. When used in mobile phones (the cut-off voltage of mobile phones is generally around 3.4V), there will be obvious feeling of insufficient capacity.
Moreover, the existing ternary lithium battery has poor heat resistance, and the temperature of the battery often rises sharply during charging and discharging, which affects the normal operation of the battery.

Method used

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  • Cage structure lithium battery positive pole
  • Cage structure lithium battery positive pole
  • Cage structure lithium battery positive pole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, in this embodiment, the positive electrode of the cage-shaped lithium battery of the present invention includes a first cage-shaped structure 1 and a second cage-shaped structure 2, and the second cage-shaped structure 2 is arranged on the first cage-shaped structure 1 Inside, the cavity between the first cage structure 1 and the second cage structure 2 is provided with a first doped filler 3, and the cavity inside the second cage structure 2 is provided with a first Two-doped filler 4 . Wherein, the first cage structure 1 is a rectangular parallelepiped columnar structure uniformly provided with through holes on the side walls, the first doped filler 3 is arranged in the through holes, and the second cage structure 2 It is a columnar structure with a trapezoidal axial cross-section uniformly provided with via holes on the side walls, and the first doped filling body 3 is arranged in the via holes. Moreover, in this embodiment, two second ca...

Embodiment 2

[0028] In this embodiment, the structure of the positive electrode of the cage-shaped lithium battery of the present invention is the same as that of the positive electrode of the cage-shaped lithium battery in Example 1, the difference lies in: the first cage structure 1 and the second The specific composition of the cage structure 2, the first doped filling body 3 and the second doped filling body 4 is the same as that of the first cage structure 1 and the second cage structure 2 in Example 1. , The specific compositions of the first doped filling body 3 and the second doped filling body 4 are different.

[0029] Wherein, the first cage structure 1 is made of the following raw materials: 15wt% lithium cobaltate, 15wt% lithium manganate and 70wt% lithium nickelate; the second cage structure 2 is made of the following raw materials: 25wt% % lithium cobaltate, 5wt% lithium manganate and 70wt% lithium nickelate; the first doped filling body 3 is composed of the following compone...

Embodiment 3

[0032] Such as figure 2 As shown, the positive electrode of the cage structure lithium battery of the present invention includes a first cage structure 1 and a second cage structure 2, the second cage structure 2 is arranged in the first cage structure 1, and the second cage structure A first doped filler 3 is arranged in the cavity between the cage structure 1 and the second cage structure 2, and a second doped filler is arranged in the inner cavity of the second cage structure 2 4. Wherein, the first cage structure 1 is an octagonal prism structure with a regular octagonal axial cross-section with through holes evenly provided on the side walls, and the first doped filling body 3 is arranged in the through holes, and the The second cage structure 2 is a columnar structure with an irregular octagonal axial cross-section uniformly provided with conduction holes on the sidewalls, and the first doped filler 3 is disposed in the conduction holes. Moreover, in this embodiment, ...

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Abstract

The invention discloses a cage structure lithium battery positive pole. The cage structure lithium battery positive pole comprises a first cage structure and a second cage structure, wherein the second cage structure is arranged inside the first cage structure; the cavity between the first cage structure and the second cage structure is internally provided with a first doping filling body; and the internal cavity of the second cage structure is internally provided with a second doping filling body. The cage structure lithium battery positive pole is relatively high in heat resistance, the single energy density of a lithium battery can be improved, and the temperature variation of the temperature changes a little in the charging and discharging process of the lithium battery.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a positive electrode of a lithium battery with a cage structure. Background technique [0002] Ternary polymer lithium battery refers to a lithium battery in which the positive electrode material uses nickel-cobalt lithium manganate (Li(NiCoMn)O2) ternary positive electrode material. The precursor product of the ternary composite positive electrode material is based on nickel salt, cobalt salt, and manganese salt. For the raw material. Compared with lithium cobalt oxide batteries, batteries made of ternary materials are safer than lithium cobalt oxide batteries, but the voltage is too low. When used in mobile phones (the cut-off voltage of mobile phones is generally around 3.4V), there will be an obvious feeling of insufficient capacity. It is a relatively balanced material in terms of capacity and safety, and its cycle performance is better than that of normal lithium cobalt ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/36H01M4/505H01M4/525H01M4/58H01M10/0525H01M10/613H01M10/654
CPCH01M4/131H01M4/364H01M4/505H01M4/525H01M4/5815H01M10/0525H01M10/613H01M10/654Y02E60/10
Inventor 毛秦钟钱志挺吉同棕吴海军王寅峰
Owner ZHEJIANG MEIDU HITRANS LITHIUM BATTERY TECHNOLOGY CO LTD
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