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A method for improving that capacity of 1.55 V carbon coated lithium titanate battery

A carbon-coated lithium titanate and battery capacity technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of loss of battery performance, unsafe silicon materials, and reduced battery cycle times, and break the bottleneck of use Effect

Active Publication Date: 2019-01-18
SHANDONG UNIV OF SCI & TECH
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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 the common knowledge in this field, the voltage of the lithium titanate battery synthesized by this mechanism is below 1.5, so the literature can not improve the capacity of the 1.55V lithium titanate battery

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  • A method for improving that capacity of 1.55 V carbon coated lithium titanate battery
  • A method for improving that capacity of 1.55 V carbon coated lithium titanate battery

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Embodiment Construction

[0020] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] A method for increasing the capacity of a 1.55V carbon-coated lithium titanate battery, characterized in that the preparation method is:

[0022] Step 1: Prepare raw materials

[0023] Weigh the four raw materials of lithium hydroxide, titanium oxide, terbium oxide and glucose, the molar ratio of lithium, titanium and terbium is required to meet 1.323:1.666:0.01, and the weight of glucose is 20% of the total weight of the other three raw materials

[0024] In the second step, after mixing the lithium hydroxide, titanium oxide, terbium oxide and glucose with a grinding particle size of less than 50nm in the above ratio, place it in a high-temperature furnace under an argon atmosphere, and raise the temperature to 700 at a heating rate of 12-18°C / min. -900°C, and then kept at this temperature for 5-10 hours, aft...

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Abstract

A method for improving that capacity of 1.55 V carbon coated lithium titanate battery comprise grinding and uniformly mixing a certain proportion of lithium hydroxide, titanium oxide, terbium oxide and glucose, and performing calcining in a high-temperature furnace under an argon atmosphere for 5-10 hours, wherein the calcination temperature is 700-900 DEG C, performing naturally cooling, pulverizing, and sieving to obtain a C-coated LiTb0. 99Tb0. 01Li1 / 3Ti5 / 3O4. A 1.55 V battery of lithium titanate synthesize by hydrothermal reaction of that present invention has a capacity of 252 mAh / g.

Description

technical field [0001] The invention relates to a lithium titanate battery, and in particular provides a method for increasing the capacity of a 1.55V carbon-coated lithium titanate 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/583H01M10/0525
CPCH01M4/366H01M4/485H01M4/583H01M10/0525Y02E60/10
Inventor 谷亦杰刘洪权孙杰王海峰刘成权潘铭郭道传
Owner SHANDONG UNIV OF SCI & TECH
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