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Lithium battery and power utilization apparatus

A lithium battery and electrolyte technology, applied in the field of lithium batteries and electrical devices, can solve the problems of poor cycle performance and general conductivity, and achieve the effects of high conductivity, good cycle performance and high conductivity

Inactive Publication Date: 2017-12-12
SHANGQIU POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a lithium battery, aiming to improve the problems of poor cycle performance and general electrical conductivity of existing lithium batteries

Method used

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  • Lithium battery and power utilization apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 48g of lithium hexafluorophosphate, 30g of lithium dioxalate borate, 0.1g of carbodiimide, 0.3g of anisole, 0.1g of dimethoxy substituted benzene in the ortho position, 0.1g of tris(2-chloroethyl)phosphate, carbonic acid 2g of diethyl ester, 1.5g of ethylene carbonate, and 0.5g of acrylamide are used to make an electrolyte, and the electrolyte is further made into a lithium battery, using carbon as the negative electrode, lithium iron phosphate coated with a graphite layer as the positive electrode and poly The diaphragm made of ethylene, and finally measure the conductivity and cycle times of the lithium battery, and record them in Table 1 and Table 2 respectively.

Embodiment 2

[0034] Weigh 60 g of lithium hexafluorophosphate, 35 g of lithium dioxalate borate, 1.2 g of carbodiimide, 2 g of anisole, 1 g of para-dimethoxy substituted benzene, 4 g of tris(2-chloroethyl) phosphate, and dimethyl carbonate 8g, 7g of ethylene carbonate, and 0.7g of acrylamide were used to make an electrolyte, and the electrolyte was further made into a lithium battery, using carbon as the negative electrode, lithium iron phosphate coated with a graphite layer as the positive electrode, and a diaphragm made of polyethylene , and finally measure the conductivity and the number of cycles of the lithium battery, and record them in Table 1 and Table 2, respectively.

Embodiment 3

[0036]Weigh 50 g of lithium hexafluorophosphate, 31 g of lithium dioxalate borate, 0.4 g of carbodiimide, 0.5 g of monochloromethane, 0.2 g of para-dimethoxy substituted benzene, 0.5 g of tris(dibromopropylene) phosphate, methyl ethyl carbonate 2g of ester, 2g of ethylene carbonate, and 0.55g of acrylamide are used to make an electrolyte, and the electrolyte is further made into a lithium battery, using carbon as the negative electrode, lithium iron phosphate coated with a graphite layer as the positive electrode, and polyethylene. Diaphragm, and finally measure the conductivity and number of cycles of the lithium battery, and record them in Table 1 and Table 2, respectively.

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Abstract

The invention relates to the field of energy, and provides a lithium battery. The lithium battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte; the positive electrode is prepared from the material of lithium iron phosphate; the surface of the lithium iron phosphate is covered with a graphite layer, wherein the thickness of the graphite layer is equal to the thickness of 1-10 carbon atoms; and the electrolyte comprises the following components in parts by weight: 48-60 parts of lithium hexafluorophosphate, 30-35 parts of lithium bis(oxalate)borate, 0.1-1.2 parts of carbodiimide, 0.3-2 parts of methylphenyl ether or halogenated alkane, 0.1-1 parts of ortho-position or para-position dimethoxy substituted benzene, 0.1-4 parts of halogenated-alkyl phosphate, 2-8 parts of chain carbonate, 1.5-7 parts of cyclic carbonate and 0.5-0.7 parts of acrylamide. The lithium battery is high in electrical conductivity and cycling performance. The invention also provides a power utilization apparatus which comprises the lithium battery provided by the invention, so that the power utilization apparatus is long in service life.

Description

technical field [0001] The invention relates to the field of energy, in particular to a lithium battery and an electrical device. Background technique [0002] Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium-ion batteries generally use lithium alloy metal oxides as positive electrode materials, graphite as negative electrode materials, and non-aqueous electrolyte batteries. In 1912, the lithium metal battery was first proposed and studied by Gilbert N. Lewis. In the 1970s, M.S.Whittingham proposed and began to study lithium-ion batteries. Due to the very active chemical properties of lithium metal, the processing, storage and use of lithium metal have very high environmental requirements. Therefore, lithium metal batteries have not been used for a long time. With the development of science and technology, lithium-ion batteries have become the mainstream now. However, the existing lithium batteries h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0566H01M10/052
CPCH01M4/366H01M4/5825H01M4/625H01M10/052H01M10/0566Y02E60/10
Inventor 张存良柳彦梅宋群生张瑞玲刘帅侯明亮王广钢田鑫杨燕虎刘洋
Owner SHANGQIU POLYTECHNIC
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