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Negative electrode material and lithium ion battery comprising same

A negative electrode material and negative active material technology, applied in battery electrodes, secondary batteries, secondary battery repair/maintenance, etc., can solve problems such as complex preparation processes, and achieve excellent safety performance, good high-temperature storage performance, and excellent rate performance Effect

Active Publication Date: 2016-03-09
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few reports about changing the surface structure of negative electrode materials to improve the safety performance of lithium-ion batteries. For example, in CN102820471, graphite / LiAlO 2 / carbon nanotube composite materials to improve the safety performance of lithium-ion batteries, the preparation process is relatively complicated

Method used

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  • Negative electrode material and lithium ion battery comprising same
  • Negative electrode material and lithium ion battery comprising same
  • Negative electrode material and lithium ion battery comprising same

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Embodiment 1～19

[0051] Preparation of Examples 1-19 lithium-ion batteries (hereinafter referred to as batteries) 1-19

[0052] Batteries 1-19 were prepared according to the following method:

[0053] (1) Preparation of negative electrode materials

[0054] Negative electrode materials 1-19 were all prepared according to the following method:

[0055] 200g of PEDOT:PSS aqueous solution, 300g of negative electrode active material, and 550g of deionized water were thoroughly mixed and stirred for 5 hours, and then dried with a spray dryer to obtain a negative electrode material containing a coating layer, wherein, PEDOT:PSS The mass percentage of the substance in the aqueous solution is 1.5%.

[0056] (2) Negative sheet preparation

[0057] 1.2kg mass percentage composition is the thickener sodium carboxymethylcellulose (CMC) solution of 1.5%, 0.07kg mass percentage composition is the binder styrene-butadiene rubber emulsion of 50%, 2.4kg above-mentioned steps (1) The negative electrode mate...

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Abstract

The application relates to a negative electrode material and a lithium ion battery comprising the same. The negative electrode material comprises a base material and a coating layer positioned on the surface of the base material, wherein the base material is a negative electrode active material; the coating layer comprises at least one of PEDOT:PSS substances; the PEDOT:PSS substances can contain the following substituent groups: hydrogen atoms, halogen atoms, cyanogroups, sulfonic acid groups, nitryl, alkyl with 1-20 carbon atoms, alkenyl with 2-20 carbon atoms, aryl with 6-26 carbon atoms, oxygen atom-containing groups in alkyl with 1-20 carbon atoms, alkenyl with 2-20 carbon atoms and aryl with 6-26 carbon atoms, and groups formed by substituting alkyl with 1-20 carbon atoms, alkenyl with 2-20 carbon atoms and aryl with 6-26 carbon atoms by the halogen atoms or the cyanogroups; and the halogen atoms are F, Cl and Br. The negative electrode material is applied to the lithium ion battery, so that the lithium ion battery has excellent safety performance, high-temperature storage performance, high-performance cycle performance and rate performance.

Description

technical field [0001] The present application relates to the field of lithium ion batteries, in particular, to a negative electrode material and a lithium ion battery including the negative electrode material. Background technique [0002] In the rapidly developing information age, the demand for mobile phones, notebooks, cameras and other electronic products is increasing year by year. Due to the characteristics of high energy density, no memory effect, and high working voltage, lithium-ion batteries are gradually replacing traditional Ni-Cd and MH-Ni batteries as the working power supply of electronic products. With the expansion of market demand for electronic products and the development of power and energy storage equipment, people's requirements for the safety performance of lithium-ion batteries are also increasing. However, at this stage, the safety performance of lithium-ion batteries is restricting the development of lithium-ion batteries. one of the bottlenecks....

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M10/0525H01M10/42
CPCH01M4/366H01M4/386H01M4/587H01M10/0525H01M10/4235Y02E60/10
Inventor 陈培培彭昌志付成华吉惟肖龙兵唐超
Owner NINGDE AMPEREX TECH