Method for manufacturing non-aqueous electrolyte secondary batteries
The method forms uniform pores in the active material layer of lithium-ion batteries using a thiophosphate-based additive and aging treatment, addressing non-uniformity issues and enhancing battery performance.
JP2026085974APending Publication Date: 2026-05-26PRIME PLANET ENERGY & SOLUTIONS INC
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PRIME PLANET ENERGY & SOLUTIONS INC
- Filing Date
- 2024-11-14
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing methods for forming pores in the active material layer of non-aqueous electrolyte secondary batteries, such as lithium-ion batteries, result in non-uniform pore diameters, leading to restricted lithium ion movement and degraded output characteristics.
Method used
A manufacturing method involving a positive electrode with a thiophosphate-based positive electrode additive of specific particle size, followed by initial charging and aging treatment to decompose the additive, forming uniform pores in the active material layer.
Benefits of technology
The method enables the formation of lithium-ion secondary batteries with improved output characteristics and cycle performance by ensuring uniform pore diameter and enhancing lithium ion mobility.
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Smart Images
Figure 2026085974000001_ABST
Abstract
The present invention provides a method for manufacturing a non-aqueous electrolyte secondary battery that can form pores of uniform diameter in the positive electrode active material layer and exhibits excellent power output characteristics. [Solution] The method for manufacturing a non-aqueous electrolyte secondary battery according to the present disclosure includes the steps of: preparing a battery assembly comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte; performing an initial charge on the battery assembly; and performing an aging treatment on the battery assembly that has undergone the initial charge. The positive electrode comprises a positive electrode current collector and a positive electrode active material layer supported by the positive electrode current collector. The positive electrode active material layer includes a positive electrode active material and a thiophosphate-based positive electrode additive having an average particle diameter of 25 μm to 150 μm. The aging treatment is performed so as to decompose the thiophosphate-based positive electrode additive.
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