Samsung electronics co., ltd. (20240332526). COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, POSITIVE ELECTRODE INCLUDING THE SAME, AND SECONDARY BATTERY INCLUDING THE SAME simplified abstract
COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, POSITIVE ELECTRODE INCLUDING THE SAME, AND SECONDARY BATTERY INCLUDING THE SAME
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COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, POSITIVE ELECTRODE INCLUDING THE SAME, AND SECONDARY BATTERY INCLUDING THE SAME - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240332526 titled 'COMPOSITE POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, POSITIVE ELECTRODE INCLUDING THE SAME, AND SECONDARY BATTERY INCLUDING THE SAME
The patent application describes a positive electrode active material for a secondary battery, which includes a lithium-transition metal composite phosphate with two crystalline phases: one with an olivine structure and the other with a pyrophosphate-containing structure.
- The positive electrode active material consists of a first crystalline phase with a composition represented by formula 1 and an olivine structure, and a second crystalline phase with a composition represented by formula 2 and a pyrophosphate-containing structure.
- The second crystalline phase is present in an amount greater than 0 mole percent but not exceeding 50 mole percent relative to the total moles of both phases.
- The secondary battery using this positive electrode active material has the formula lim1PO(formula 1), lim2(PO)(formula 2), where x and y range from 0.9 to 1.1, a from 5.5 to 6.5, and b from 4.8 to 5.2, with m1 and m2 being elements from groups 3 to 11 in the 4th period of the periodic table.
Potential Applications:
- This technology can be used in the development of high-performance lithium-ion batteries for various applications, including electric vehicles, portable electronics, and grid energy storage systems.
Problems Solved:
- The positive electrode active material addresses the need for improved energy density, cycling stability, and safety in lithium-ion batteries.
Benefits:
- Enhanced performance and safety of lithium-ion batteries.
- Increased energy density and longer cycle life.
- Potential for cost-effective and sustainable energy storage solutions.
Commercial Applications:
- The technology has significant commercial potential in the battery industry, particularly for electric vehicles, consumer electronics, and renewable energy storage systems.
Questions about the technology: 1. How does the presence of the second crystalline phase with a pyrophosphate-containing structure impact the performance of the positive electrode active material? 2. What are the specific advantages of using a lithium-transition metal composite phosphate in lithium-ion batteries compared to other electrode materials?
Original Abstract Submitted
a positive electrode active material includes a lithium-transition metal composite phosphate including a first crystalline phase having a composition represented by formula 1 and having an olivine structure, and a second crystalline phase having a composition represented by formula 2 and having a pyrophosphate-containing structure, wherein the second crystalline phase is in an amount of greater than 0 mole percent and not greater than 50 mole percent with respect to a total number of moles of the first crystalline phase and the second crystalline phase, a positive electrode, a secondary battery: lim1po(formula 1), lim2(po)(formula 2), where 0.9≤x≤1.1, 0.9≤y≤1.1, 5.5≤a≤6.5, and 4.8≤b≤5.2, and m1 and m2 are each independently an element from groups 3 to 11 in the 4th period of the periodic table of the elements, or a combination thereof.
