Anti-gas expansion additive and applicable lithium titanate battery
A lithium titanate battery and additive technology, which is applied in battery electrodes, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of limiting the commercial application of lithium titanate negative electrode materials, increasing battery impedance, and decreasing cycle performance. Effects of flatulence, clear ingredients, and simple preparation methods
Active Publication Date: 2017-02-15
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology
[0003] After long-term observation and research, the inventor found that lithium titanate batteries will continue to be flattened during storage and recycling, resulting in increased battery impedance and rapid decline in cycle performance, which has become one of the most important obstacles to the commercial application of lithium titanate negative electrode materials.
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[0030] The following will be further described in detail in conjunction with specific embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] An anti-flatulence additive and a suitable lithium titanate battery thereof. The battery includes a titanium-based negative electrode active material and a carbonate or long-chain ether solvent electrolyte, and the negative electrode active material is lithium titanate or a modified product of lithium titanate, titanium Titanium-based compounds such as oxides or modified products of titanium oxides or mixtures of the above materials.
[0032] The steps to test battery an...
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The invention provides an anti-gas expansion additive and an applicable lithium titanate battery. The additive is a nitrogenous phosphate ester or phosphite ester derivative; and the applicable lithium titanate battery comprises a titanium-based negative electrode active material and carbonic ester or long-chain ether solvent electrolyte. The anti-gas expansion additive provided by the invention fits the existing lithium titanate battery well without replacement of a film, a positive electrode material and a shell; and the gas expansion phenomenon of the lithium titanate battery can be suppressed efficiently. The anti-gas expansion additive and the applicable lithium titanate battery have clear constituents, are simple in preparation methods and suitable for industrial application and have a wide application prospect in the field of power batteries and energy storage batteries.
Description
technical field [0001] The invention relates to a battery electrolyte additive, in particular to an anti-flatulence additive and a suitable lithium titanate battery. Background technique [0002] As the most potential negative electrode active material - titanium-based negative electrode materials, especially spinel lithium titanate (Li 4 Ti 5 o 12 , LTO) has received extensive attention. Compared with traditional graphite anode materials, LTO has a stable crystal structure, and its volume remains almost unchanged when lithium ions are intercalated and deintercalated. It is called a "zero strain" material and has a very high cycle life; the ion diffusion rate inside the material Fast and non-toxic raw materials, green and environmentally friendly; high lithium intercalation potential (1.55V vs. Li / Li + ), which avoids the precipitation of lithium dendrites on the surface of the negative electrode, and has good safety. Therefore, lithium-ion batteries with LTO as the neg...
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Login to View More IPC IPC(8): H01M4/485H01M10/0567H01M10/058
CPCH01M4/485H01M10/0567H01M10/058Y02E60/10Y02P70/50
Inventor 杨凯王德宇尹秀娟张明杰耿萌萌高飞刘皓
Owner CHINA ELECTRIC POWER RES INST