A hydrothermal reaction method to improve the capacity of 1.55v lithium titanate battery

Abstract

The invention discloses a hydrothermal reaction method for increasing the capacity of a 1.55V lithium titanate battery, which comprises lithium hydroxide LiOH and thulium nitrate Tm(NO) 3 aqueous solution, and butyl titanate C 16 h 36 o 4 The organic solution of Ti is mixed according to the proportion and then hydrothermally reacted to obtain the precursor: then the precursor is calcined to obtain the molecular formula Li 0.99 T m 0.01 Li 1 / 3 Ti 5 / 3 o 4 lithium titanate powder. In the present invention, thulium nitrate is added to butyl titanate and lithium hydroxide, and by designing the ratio of the three raw materials, the capacity of the lithium titanate 1.55V battery synthesized by hydrothermal reaction is 250mAh / g.

Description

technical field [0001] The invention relates to a lithium titanate battery, and in particular provides a hydrothermal method for increasing the capacity of a lithium titanate single battery. Background technique [0002] In the 1990s, lithium titanate Li 4 Ti 5 o 12 Appearing as the anode material of a new type of lithium battery, it has been valued due to its high safety, high stability, long life and green environmental protection. As far as the currently used lithium titanate battery is concerned, lithium titanate is used as the negative electrode material instead of graphite, and it can be combined with lithium manganate, ternary materials or lithium iron phosphate and other positive electrode materials to form a 2.4V or 1.9V lithium ion secondary battery. Lithium titanate battery has obvious advantages, but its shortcomings are also obvious, such as relatively low energy density and weak battery life, which is largely determined by the voltage of the single battery. ...

AI Technical Summary

Problems solved by technology

The technology of these open literature record is that the capacity of battery is high on the surface, but the method that takes is all the method of palliative, not the root cause, in reality these methods have the following problems: the one, although the capacity of battery is high, but with The loss of other performances of the battery is at the expense of, for example, after doping with silicon, the number of cycles of the composite battery is greatly reduced, resulting in a shortened battery life; second, the capacity of the battery is high, and the safety of the battery is affected by the unsafe silicon material. Sex down

According to common sense in the field, the voltage of the lithium titanate battery synthesized by this mechanism is below 1.5V, so the literature cannot improve the capacity of the 1.55V lithium titanate battery

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