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Negative electrode active material for lithium-ion/sodium-ion battery, negative electrode and battery

A negative electrode active material and sodium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high initial Coulombic efficiency, insufficient capacity, and small difference between charge and discharge voltage platforms

Active Publication Date: 2015-05-06
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the invention provides a negative electrode active material, a negative electrode and a battery for a lithium ion / sodium ion secondary battery. The discharge voltage platform with small difference and moderate voltage platform is suitable for the negative electrode of lithium ion battery and sodium ion battery, and provides lithium ion battery and sodium ion battery including this kind of negative electrode, thus solving the problem of current lithium ion battery and sodium ion battery The negative electrode has technical problems of insufficient capacity or relatively low initial Coulombic efficiency

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  • Negative electrode active material for lithium-ion/sodium-ion battery, negative electrode and battery
  • Negative electrode active material for lithium-ion/sodium-ion battery, negative electrode and battery
  • Negative electrode active material for lithium-ion/sodium-ion battery, negative electrode and battery

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[0069] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0070] The negative electrode active material for lithium ion / sodium ion secondary battery provided by the present invention is a material with diverse components, which mainly includes one or more of the following four categories of materials:

[0071] (1) phosphorus germanium compound;

[0072] (2) the first compound;

[0073] (3) the second complex;

[0074] (4) the third compound;

[0075] T...

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Abstract

The invention provides a negative electrode active material for a lithium-ion / sodium-ion secondary battery, a negative electrode and a battery, belonging to the technical field of electrochemistry and batteries. The negative electrode active material comprises a phosphorus-germanium compound, or / and a first complex formed by the phosphorus-germanium compound and elementary P or / and elementary Ge, or / and a second complex formed by the phosphorus-germanium compound and conductive components, or / and a third complex formed by the first complex and conductive components. The negative electrode provided by the invention comprises the negative electrode active material. The negative electrode has the advantages of high specific capacity, high initial Coulomb efficiency, small charge-discharge voltage platform difference and good high-current charge-discharge performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and batteries, and more particularly, relates to a negative electrode active material, a negative electrode and a battery for lithium ion / sodium ion batteries. Background technique [0002] Compared with batteries such as nickel-metal hydride and nickel-cadmium, lithium-ion batteries have the characteristics of high voltage, high capacity and small weight. Therefore, in recent years, lithium secondary batteries are widely used as main power sources for mobile communication equipment, portable electronic equipment, electric bicycles, electric two-wheeled vehicles, electric vehicles, and the like. However, with the rapid development of communications, electric vehicles, electronic equipment and space technology, higher and higher requirements are placed on the performance of batteries, and it has become a challenge to explore new energy storage systems to overcome traditional fuel energy st...

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Application Information

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IPC IPC(8): H01M4/58H01M4/62H01M4/136H01M10/0525H01M10/054
CPCH01M4/362H01M4/38H01M4/5805H01M4/624H01M10/0525H01M10/054H01M4/58Y02E60/10
Inventor 李会巧李文武翟天佑
Owner HUAZHONG UNIV OF SCI & TECH
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