A method for improving the capacity of 1.55v nano lithium titanate battery

A technology of lithium titanate and battery capacity, applied in the field of increasing the capacity of 1.55V nano-lithium titanate single battery, can solve the problems of loss of battery performance, unsafe silicon material, reduction of battery cycle times, etc. bottleneck effect

Active Publication Date: 2021-05-28
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • A method for improving the capacity of 1.55v nano lithium titanate battery
  • A method for improving the capacity of 1.55v nano lithium titanate battery

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] A method for improving the capacity of a 1.55V nano-lithium titanate battery, the specific steps are:

[0025] Step 1: Prepare raw materials

[0026] Weigh and weigh butyl titanate C 16 h 36 o 4 Ti, polyvinyl alcohol PVA, lithium hydroxide LiOH and terbium nitrate Tb (NO 3 ) 3 Four raw materials, the molar ratio of elements lithium, titanium and terbium is required to meet 1.666:1.323:0.01, and the weight of PVA is 5-10% of the total weight of the three raw materials of butyl titanate, lithium hydroxide and terbium nitrate;

[0027] Step 2: Precursor Synthesis

[0028] In butyl titanate C 16 h 36 o 4 Add water and polyvinyl alcohol PVA to Ti to dissolve butyl titanate, then add lithium hydroxide LiOH and terbium nitrate (NO 3 ) 3 After the aqueous solution is mixed evenly, add it to the autoclave, he...

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Abstract

The invention discloses a method for improving a nanometerized 1.55V lithium titanate battery. It is to add water and polyvinyl alcohol PVA to dissolve butyl titanate in butyl titanate, and mix lithium hydroxide and terbium nitrate Tb(NO 3 ) 3 The aqueous solution is mixed uniformly in a certain proportion and hydrothermally reacted to obtain the precursor: then the precursor is calcined to obtain the molecular formula Li 0.99 Tb 0.01 Li 1 / 3 Ti 5 / 3 o 4 lithium titanate powder. The capacity of the 1.55V battery utilizing the lithium titanate synthesized by the present invention is 253mAh / 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 nanometerized 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 ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/44
CPCH01M10/42H01M10/44Y02E60/10
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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