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A lithium titanate battery and electrolyte technology, applied in battery electrodes, batteries, secondary batteries, etc., can solve the problems of easy gas production, high-temperature cycle of batteries, and poor storage performance
Inactive Publication Date: 2017-01-11
DONGGUAN SHANSHAN BATTERY MATERIALS
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[0005] One of the objectives of the present invention is to provide a battery capable of suppressing high-temperature gas production for the current lithium titanate battery electrolyte that is prone to gas production during high-temperat...
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Embodiment 1
[0027] Electrolyte preparation:
[0028] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the electrolyte solution of Example 1.
[0029] Preparation of lithium titanate battery:
[0030] The positive electrode active material LiNi 0.5 co 0.2 mn 0.3 o 2 , Super P, KS-6, and PVDF were fully stirred and mixed in the N-methylpyrrolidone solvent system according to the mass ratio of 92:3:1:4, and then coated on aluminum foil, dried, and cold pressed to obtain a positive electrode sheet. The compacted density is 3.45g / cm 3 .
[0031] Negative electrode active material lithium titanate, conductive agent acetylene black, binder styrene-butadiene rubber (SBR), thickener sodium carboxymethyl cellulose (CMC) in N-methyl After fully stirring and mixing in the pyrrolidone solvent system, it is coated on a copper foil, dried, and cold pressed to obtain a negative electrode sheet with a compacted density of 1.70g / cm 3 .
[0...
Embodiment 2
[0035] Different from Example 1 is the preparation of electrolyte:
[0036] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the electrolyte solution of Example 2.
[0037] The rest are the same as in Embodiment 1, and will not be repeated here.
Embodiment 3
[0039] Different from Example 1 is the preparation of electrolyte:
[0040] In a glove box filled with argon (moisture 6 , and stirred until it was completely dissolved to obtain the electrolyte solution of Example 3.
[0041] The rest are the same as in Embodiment 1, and will not be repeated here.
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Abstract
The invention relates to the technical field of lithium ion batteries, in particular to a lithium titanate battery and electrolyte thereof. The electrolyte comprises lithium salt, non-aqueous organic solvent and additives, wherein the additives include cathode membrane-forming additive A, an anode protective additive B and a reactive hydrogen combining additive C, and the reduction potential, relative to metal lithium, of the additive A is not smaller than 1.4V. Compared with the prior art, the lithium titanate battery and the electrolyte thereof have the advantages that gas generation of the lithium titanate battery during high-temperature storage and high-temeprature circulation is inhibited by the synergic effects of the additive A, the additive B and the additive C, the rising of battery internal resistance is inhibited at the same time, and the high-temperature storage performance and high-temperature circulation performance of the lithium titanate battery are increased effectively.
Description
technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium titanate battery and an electrolyte thereof. Background technique [0002] At present, the widely used lithium titanate battery negative electrode materials are mainly graphite materials, but because graphite negative electrode materials have a potential close to that of metal lithium, metal lithium dendrites are easily precipitated on the electrode surface during overcharging, causing short circuits, thermal runaway and other safety hazards. Hidden danger. Therefore, the lithium titanate battery using lithium titanate as the negative electrode material has gradually become a research hotspot in the industry. [0003] At present, lithium titanate batteries are widely used in the field of power and energy storage because of their long cycle life, stable discharge voltage, support for high-rate charge and discharge, and high safety. However, the disadvanta...
Claims
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