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C70 fullerene glucose thioglycoside derivative and application thereof as cathode material of lithium battery

A technology of fullerene and glucose, which is applied in the preparation of sugar derivatives, sugar derivatives, and sugar derivatives, and can solve the problem of low specific capacity of positive electrode materials

Inactive Publication Date: 2017-11-24
YANGZHOU POLYTECHNIC INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the key to limiting the specific energy improvement of secondary lithium batteries is still the low specific capacity of the positive electrode material.

Method used

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  • C70 fullerene glucose thioglycoside derivative and application thereof as cathode material of lithium battery
  • C70 fullerene glucose thioglycoside derivative and application thereof as cathode material of lithium battery
  • C70 fullerene glucose thioglycoside derivative and application thereof as cathode material of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh C70 fullerene (1 mmol), formula II compound (1 mmol, CAS registration number: 236115-72-3) and dissolve in chlorobenzene (12 mL), heat to 85 ° C for 6 hours, continue to heat to reflux temperature for reaction After 12 hours, after concentration under reduced pressure, silica gel column chromatography (stationary phase: 200-300 mesh silica gel, mobile phase: toluene / acetone=10:2-10:5) gave a light brown solid (544 mg, yield approx. 49%), which is the compound of formula I, after mass spectrometry (maXis ultra-high resolution time-of-flight mass spectrometer, figure 1 ), infrared ( figure 2 ), TG-DSC comprehensive thermal analysis ( image 3 ) and other parameters.

Embodiment 2

[0020] Weigh C70 fullerene (2mmol), formula II compound (1mmol, CAS registration number: 236115-72-3) dissolved in DMF (15mL), heated to 85 ° C for 10 hours, continue to heat to reflux temperature reaction 8 Hours later, after concentration under reduced pressure, silica gel column chromatography (stationary phase: 200-300 mesh silica gel, mobile phase: toluene / acetone = 10:2-10:5) gave a light brown solid (552 mg, yield about 50 %), which is the compound of formula I, and the structural characterization data is consistent with that of Example 1.

Embodiment 3

[0022] A simulated battery was assembled with the compound of formula I of the present invention as the positive electrode active material and metal lithium, and the electrochemical performance test was carried out.

[0023] The present invention adopts the coating method to prepare the composite pole piece, mixes the compound of formula I, the conductive agent acetylene black, and the binder PEO according to the mass ratio of 60%, 30%, and 10%, and grinds them evenly, then mixes them with a mixed solvent of water and n-propanol (volume ratio 1:4) into a paste, spread evenly on the current collector, dry at room temperature for 24 hours, cut into 1×1cm 2 The pole pieces were vacuum-dried at 60°C for 8 hours for later use.

[0024] The simulated battery adopts a two-electrode system. The composite electrode prepared by the above method is used as the positive electrode, and the lithium foil is used as the negative electrode. 1MLi CF 3 SO 3 The dioxolane + diglyme + ethylene g...

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Abstract

The invention relates to a C70 fullerene glucose thioglycoside derivative and an application thereof as a cathode material of a lithium battery. The C70 fullerene glucose thioglycoside derivative has a structure represented by the formula I.

Description

technical field [0001] The invention belongs to the field of photoelectric materials, and in particular relates to a C70 fullerene glucosinolate derivative and its application as a lithium battery cathode material. Background technique [0002] In the new electrochemical energy storage system, the specific capacity of metal lithium is the highest among the existing negative electrode materials (the specific capacity can reach 3861mAh / g), and the potential is the most negative (-3.045V), so metal lithium is used as the negative electrode The energy storage system of materials is the most promising high specific energy system. However, the key to limiting the specific energy of secondary lithium batteries is still the low specific capacity of the positive electrode material. Therefore, the development of a cathode material with high specific capacity has become a research hotspot. [0003] Due to the strong electron-accepting ability of fullerene molecules and the bending ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H15/203C07H1/00H01M4/60H01M10/0525
CPCC07H1/00C07H15/203H01M4/60H01M10/0525Y02E60/10
Inventor 李瑞谢伟
Owner YANGZHOU POLYTECHNIC INST
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