Anode and secondary battery comprising anode

A negative electrode and negative active material technology, applied in the direction of secondary batteries, battery electrodes, circuits, etc., can solve the problems of difficulty in maintaining high charging and discharging capacity, battery life performance and fast charging performance, etc., to achieve improved Effects of life performance and quick charging performance, improvement of quick charging performance, and reduction in volume expansion

Pending Publication Date: 2021-11-12
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, it is difficult to maintain a high charge and discharge capacity, and there is a problem that the battery life performance and quick charge performance are not much improved

Method used

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  • Anode and secondary battery comprising anode
  • Anode and secondary battery comprising anode

Examples

Experimental program
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Effect test

Embodiment 1

[0074] Embodiment 1: the manufacture of negative electrode

[0075] A negative electrode active material comprising a core and a coating layer (thickness 285 nm) provided on the core and containing carbon nanofibers (average diameter: 285 nm) was used. The core is obtained by adding flake natural graphite (D 50 : 250nm) spheroidization, the spheroidized flaky natural graphite is acid-treated, and then formed by controlling the internal pore volume through the CIP process, and contains natural graphite (sphericity 0.95, D 50 : 11 μm) and an amorphous carbon layer (4% by weight) disposed on spheroidized natural graphite. The anode active material contained oxygen, nitrogen, and hydrogen, and in the anode active material, the content of oxygen was 1,700 ppm by weight, the content of nitrogen was 250 ppm by weight, and the content of hydrogen was 250 ppm by weight. The content of the coating layer in the negative electrode active material was 4.2% by weight. The pore volume o...

Embodiment 2

[0077] Example 2: Manufacture of Negative Electrode

[0078] Negative electrode is manufactured in the same manner as Example 1, the difference is that the natural graphite contained in the core is flake natural graphite (D 50 : 400nm) modified and spheroidized (sphericity 0.95) natural graphite (D 50 : 12 μm).

Embodiment 3

[0079] Embodiment 3: the manufacture of negative electrode

[0080] An anode was fabricated in the same manner as in Example 1, except that the content of oxygen (based on the total amount of the anode active material) was 2,000 ppm by weight.

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Abstract

The present invention relates to an anode and a secondary battery, the anode comprising an anode active material layer including an anode active material, wherein the anode active material includes a core and a coating layer disposed on the core, the core comprises a natural graphite and an amorphous carbon layer, D50 of the natural graphite is 10 um to 14 um, and as confirmed through ONH analysis, the anode active material comprises 1,500 ppm wt% to 2,000 ppm wt% of oxygen, 200 ppm wt% to 300 ppm wt% of nitrogen, and 200 ppm wt% to 300 ppm wt% of hydrogen, and the coating layer comprises carbon nanofibers.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2019-0006404 filed with the Korean Intellectual Property Office on January 17, 2019, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to an anode and a secondary battery, the anode comprising an anode active material layer containing an anode active material, wherein the anode active material comprises a core and a coating provided on the core, wherein the core comprises natural graphite and Amorphous carbon layer, wherein said natural graphite has a D of 10 μm to 14 μm 50 , and when confirmed by the ONH analysis method, 1,500 ppm to 2,000 ppm by weight of oxygen, 200 to 300 ppm by weight of nitrogen, and 200 to 300 ppm by weight of hydrogen are contained in the negative electrode active material, and The coating contains carbon nanofibers. Backgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/0525H01M4/133
CPCH01M10/0525H01M4/587H01M4/133Y02E60/10H01M4/366H01M4/1393H01M4/625H01M4/505H01M4/525H01M2004/021
Inventor 崔希源金帝映禹相昱朴丽霖
Owner LG ENERGY SOLUTION LTD
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