Long-life lithium iron phosphate/hard carbon flexible package lithium battery

Abstract

The invention relates to a long-life lithium iron phosphate / hard carbon flexible package lithium battery, which comprises an outer package aluminum-plastic film coverage layer and is characterized in that a diaphragm layer, a cathode layer, a diaphragm layer and an anode layer are sequentially stacked below the outer package coverage layer from outside to inside, wherein the cathode layer extends to form a cathode lug assembly, and the anode layer extends to form an anode lug assembly. Accordingly, based on the coordination between the cathode layer constituted by a hard carbon layer and the anode layer constituted by lithium iron phosphate and the adoption of a lithium hexafluorophosphate organic solvent, a secondary lithium ion battery with long cycle life, high specific capacity, stable structure, rich raw material resources, good safety and no environment pollution can be obtained.

Description

technical field [0001] The invention relates to a battery, in particular to a long-life lithium iron phosphate / hard carbon soft-pack lithium battery. Background technique [0002] As far as lithium-ion batteries are commonly found in the market, their performance is closely related to the performance of lithium-ion battery materials. Therefore, the development of lithium-ion batteries is accompanied by the innovation and breakthrough of battery materials, including positive and negative electrode materials, electrolytes, diaphragms, etc. Among them, positive and negative electrode materials and electrolytes have the greatest impact on batteries, and are also the focus of lithium-ion battery research. . [0003] At the same time, most of the currently commercialized lithium-ion batteries use lithium cobaltate materials as positive electrodes and graphitized carbon materials as negative electrodes. With the development of information technology, portable devices represented ...

AI Technical Summary

Problems solved by technology

Lithium-ion batteries with lithium cobalt oxide materials as positive electrodes and graphitized carbon materials as negative electrodes can no longer meet the above development requirements.

[0004] Since the lithium-ion battery using pure lithium cobalt oxide as the positive electrode has some problems such as low safety, it is inevitable to choose a better positive electrode material

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