Single crystal type IV-VI-VIII group lithium-rich disordered rock salt structure positive electrode material and preparation method thereof

A technology of IV-VI-VIII, positive electrode materials, applied in the field of lithium-ion battery positive electrode materials, can solve the problems of few researches on positive electrode materials, few reports, etc.
CN112680791APending Publication Date: 2021-04-20北京理工大学重庆创新中心 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
北京理工大学重庆创新中心
Publication Date
2021-04-20

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Abstract

The invention discloses a single crystal type IV-VI-VIII group lithium-rich disordered rock salt structure positive electrode material and a preparation method thereof. The general formula of the positive electrode material is Li<1+a>TiW<c>Ni<d>O<2>, wherein a is greater than 0.1 and smaller than 0.3, b is greater than 0.1 and smaller than 0.4, c is greater than 0.1 and smaller than 0.4, d is greater than 0.1 and smaller than 0.4 , and the sum of a+4b+6c+2d is equal to 3. The single crystal type material is composed of IV group elements, VI group elements and VIII group elements, is specifically composed of titanium of the IV group elements, tungsten of the VI group elements and nickel of the VIII group elements, and has a more stable three-dimensional disordered cation skeleton structure, a more complete crystal structure, higher compaction density and a smaller specific surface area compared with a traditional ternary lithium nickel cobalt manganate positive electrode material; and therefore, the material has good rate capability and cycle performance, and can be used in lithium ion batteries.
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Description

technical field

[0001] The invention relates to the field of positive electrode materials for lithium ion batteries, in particular to a single crystal type IV-VI-VIII group lithium-rich disordered rock salt structure positive electrode material and a preparation method thereof. Background technique

[0002] In the 21st century, the energy crisis and environmental pollution have gradually become unavoidable topics that hinder the high-quality development of the world, and the development of new environmentally friendly energy has thus become a major issue that determines the future destiny of mankind. The main way to utilize new energy is to convert it into electrical energy, so energy storage and conversion are key issues. As an efficient energy storage device, lithium-ion batteries have attracted widespread attention from all over the world. In the lithium-ion battery system, the battery capacity is mainly limited by the capacity of the positive electrode material, and the...

Claims

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