Lithium-ion flexible-cell substrate-free positive plate and preparation method
A flexible battery, substrate-free technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of poor flexibility, poor cycle performance, and low capacity density of flexible batteries, and achieve extended service life, Excellent high rate performance and large capacity
Inactive Publication Date: 2017-05-24
ANHUI UNIVERSITY
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Problems solved by technology
[0005] The invention proposes a lithium-ion flexible battery substrate-free positive electrode sheet and a preparation method thereof. Polyurethane is used as an adhesive and an impregnation process is adopted to prepare a lithium-ion flexible battery substrate-free positive electrode sheet, which solves the problem of poor flexibility of flexible batteries. Insufficient flexibility, low capacity density, and poor cycle performance technical problems
Method used
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Embodiment 1
[0055] A lithium-ion flexible battery substrate-free positive electrode sheet, the raw materials of which include: lithium iron phosphate, conductive carbon black, and thermoplastic polyurethane.
Embodiment 2
[0057] A lithium-ion flexible battery substrate-free positive electrode sheet, the raw materials of which include by weight: 40 parts of lithium iron phosphate, 5 parts of conductive carbon black, and 10 parts of thermoplastic polyurethane.
Embodiment 3
[0059] A lithium-ion flexible battery substrate-free positive electrode sheet, the raw materials of which include, by weight, 80 parts of nickel-cobalt lithium manganese oxide, 10 parts of acetylene black, and 55 parts of solvent-based polyurethane.
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Abstract
The invention discloses a lithium-ion flexible-cell substrate-free positive plate. The positive plate includes an active material, a conductive agent and an adhesive. The adhesive includes thermoplastic polyurethane and / or solvent-type polyurethane, the positive plate reduces cell weight, improves cell capacity density and stability and safety during a using process; the invention further discloses a preparation method for the lithium-ion flexible-cell substrate-free positive plate, and a processing technology of an impregnation method is adopted. The positive plate not only improves the flexibility, deformation rate and intensity of the positive plate, but also can bear repeated bend, warping, stretch and folding deformation without affecting the cell performance so that the service life of the cell is prolonged. Meanwhile, the positive plate has the advantages of being high in capacity, good in cycle performance and excellent in high rate performance.
Description
technical field [0001] The invention belongs to the technical field of flexible lithium-ion batteries, and in particular relates to a substrate-free positive electrode sheet of a lithium-ion flexible battery and a preparation method thereof. Background technique [0002] At present, a small number of conceptual flexible battery devices have appeared, and the design of these devices is based on the development of flexible batteries. Flexible batteries refer to batteries that can withstand repeated bending, twisting, stretching, and folding without affecting performance. In order to meet the needs of bendable, implantable, and wearable electronic products, high-performance flexible batteries are urgently needed to be developed. [0003] Flexible batteries at home and abroad currently mainly use metal current collectors. Patent CN201180004137.9 proposes a thin flexible battery. The positive electrode collector of the flexible battery contains at least one of silver, nickel, pa...
Claims
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Login to View More IPC IPC(8): H01M4/13H01M4/139H01M4/62H01M10/0525
CPCH01M4/13H01M4/139H01M4/622H01M10/0525Y02E60/10
Inventor 鲍俊杰陶灿许戈文黄毅萍高明昊尹博皓齐国钦黄祺开
Owner ANHUI UNIVERSITY