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Cathode materials, electrochemical devices and electronic devices

A cathode material, electrochemical technology, applied in the field of electrochemical energy storage, to make up for the irreversible capacity loss and improve the cycle capacity retention rate

Active Publication Date: 2022-07-29
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although various methods exist to improve the cycle capacity retention of electrochemical devices, they are not completely satisfactory in every aspect, and further improvements in this area are expected.

Method used

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  • Cathode materials, electrochemical devices and electronic devices
  • Cathode materials, electrochemical devices and electronic devices
  • Cathode materials, electrochemical devices and electronic devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Preparation of cathode materials

[0054] Step (1): According to the element molar ratio Ni:Co:Mn=80:10:10, the configuration contains NiSO 4 , CoSO 4 , MnSO 4 The mixed solution is mixed with a precipitant (NaOH solution) and a complexing agent (ammonia), and by controlling the reaction time, ammonia concentration, and pH value>12, a β-phase nickel-cobalt-manganese precursor with an average particle size of 10 μm is obtained. TM(OH) 2 (TM=Ni / Co / Mn), the crystal phase structure is R3m layered structure.

[0055]Step (2): The nickel-cobalt-manganese precursor and lithium hydroxide in step (1) are ground and mixed uniformly, and calcined in an oxygen atmosphere at 750° C. for 10 hours to obtain a molar ratio of Ni:Co:Mn=80:10:10, an average of Nickel cobalt lithium manganate agglomerates with a particle size of 10um are obtained to obtain a matrix whose crystal phase structure is R3m layered structure;

[0056] Step (3): According to the element molar ratio Ni:Co:Mn=...

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Abstract

Embodiments of the present application provide cathode materials, electrochemical devices, and electronic devices. An embodiment of the present application proposes a positive electrode material, including: a substrate, and a first material located on the surface of the substrate; the first material includes a P3m1 structure compound. The first material on the surface of the substrate can provide additional sites for accommodating lithium ions, so as to ensure sufficient accommodating sites for lithium ions in the case of structural collapse of the substrate, thereby making up for the irreversible capacity loss caused by the collapse of the matrix structure.

Description

technical field [0001] The present application relates to the field of electrochemical energy storage, and in particular, to cathode materials, electrochemical devices and electronic devices. Background technique [0002] In recent years, with the rapid development of electronic products and electric vehicles, the requirement for the cycle capacity retention rate of electrochemical devices (eg, lithium-ion batteries) is also increasing. Although various methods exist to improve the cycle capacity retention of electrochemical devices, not every aspect has been completely satisfactory, and further improvements in this area are expected. SUMMARY OF THE INVENTION [0003] Embodiments of the present application provide a positive electrode material, including: a matrix, and a first material located on the surface of the matrix; the first material includes a P3m1 structure compound. [0004] In some embodiments, the X-ray diffraction pattern of the cathode material has diffract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485
CPCC01G53/44H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028C01P2004/03C01P2002/72C01P2006/40C01P2002/30C01P2002/76C01P2004/62C01P2004/64C01P2004/61Y02E60/10
Inventor 谷风
Owner NINGDE AMPEREX TECH
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