A kind of high residual alkali lithium ion multiple positive electrode material and preparation method thereof

A positive electrode material, lithium ion technology, applied in the field of high residual alkali type lithium ion multi-component positive electrode material and its preparation, can solve problems such as battery failure, achieve the effect of improving electrochemical performance, improving overcharge safety performance, and stabilizing the structure

Active Publication Date: 2022-06-17
JIANGSU TENPOWER LITHIUM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Battery failure caused by improper use occurs from time to time

Method used

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  • A kind of high residual alkali lithium ion multiple positive electrode material and preparation method thereof
  • A kind of high residual alkali lithium ion multiple positive electrode material and preparation method thereof
  • A kind of high residual alkali lithium ion multiple positive electrode material and preparation method thereof

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Embodiment 1

[0032] The present invention will be described in detail below through specific embodiments.

[0033] see example Figure 1-5 and Table 1, the present invention provides the following technical solutions: a high residual alkali lithium ion multi-element positive electrode material is characterized in that: the general chemical formula of the positive electrode material is: Li a Ni x Co y Mn 1-x-y A z O 2 , where 0.90≤a≤1.12, 0≤x≤1, 0≤y≤1, x+y≤1, 0.01≤z≤0.15, A is a dopant; the lithium ion secondary battery cathode material is a primary Secondary particles or primary particles formed by agglomeration of particles, or mixed particles composed of primary particles and secondary particles.

[0034] Table 1

[0035] Sample type Lithium carbonate content / wt% Lithium hydroxide content / wt% Example 1.11 0.26 Commercially available 0.12 0.25

[0036] The preparation method of this embodiment comprises the following steps:

[0037] Preparation of ...

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Abstract

The invention belongs to the technical field of preparation of positive electrode materials for lithium ion batteries, and discloses a lithium ion multi-element positive electrode material with high residual alkali and a preparation method thereof. The general chemical formula of the positive electrode material is: Li a Ni x co y mn 1‑x‑y A z o 2 , wherein 0.90≤a≤1.12, 0≤x≤1, 0≤y≤1, x+y≤1, 0.01≤z≤0.15, A is a dopant; the lithium-ion secondary battery cathode material is primary Secondary particles or primary particles formed by particle aggregation, or mixed particles composed of primary particles and secondary particles, and by adjusting the ratio of lithium salt and transition metal elements, optimizing the sintering temperature to obtain a positive electrode material with high residual alkali. The positive electrode material of the present invention increases the overcharged gas production of the steel case battery, improves the overcharge safety performance of the steel case battery, and at the same time improves the electrochemical performance of the material itself to a certain extent.

Description

technical field [0001] The invention relates to the technical field of preparation of positive electrode materials for lithium ion batteries, in particular to a high residual alkali type lithium ion multicomponent positive electrode material and a preparation method thereof. Background technique [0002] At present, a relatively common commercial lithium battery is a device that uses graphite as the negative electrode and ternary material as the positive electrode to convert chemical energy and electrical energy into each other. The positive electrode sheet with welded tabs, the separator, and the negative electrode sheet with welded tabs are stacked in sequence, and wound together to form a roll core. Weld the positive and negative tabs to the cap and the bottom of the steel shell respectively, and inject electrolyte into the steel shell to fix the cap. Such a simple cylindrical lithium battery is completed. [0003] At any time, the trend of cordless power tools intensif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525C01G53/00
CPCH01M4/505H01M4/525H01M10/0525C01G53/50C01P2006/40H01M2004/021H01M2004/028Y02E60/10
Inventor 张永虎郑春龙沈春平宛程
Owner JIANGSU TENPOWER LITHIUM
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