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Anode material CuS@rGO of lithium ion battery and preparation method of anode material CuS@rGO

A lithium-ion battery and anode material technology, which is applied in the field of optoelectronic device preparation, can solve the problems of low coulombic efficiency and high charge-discharge platform of pure graphene materials in the first cycle, and achieve enhanced cycle stability, high first-time discharge capacity, and reduced internal stress. small effect

Active Publication Date: 2014-04-16
CHANGZHOU UNIV
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Problems solved by technology

However, pure graphene materials cannot be directly used as electrode materials for lithium-ion batteries due to their low first-cycle Coulombic efficiency and high charge-discharge platform.

Method used

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  • Anode material CuS@rGO of lithium ion battery and preparation method of anode material CuS@rGO
  • Anode material CuS@rGO of lithium ion battery and preparation method of anode material CuS@rGO
  • Anode material CuS@rGO of lithium ion battery and preparation method of anode material CuS@rGO

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Embodiment 1

[0024] a. Graphite oxide (GO) was prepared by the modified Hummer's method.

[0025] b. Disperse 40 mg of GO into 40 ml of deionized water, stir for 3 hours, sonicate for 20 minutes, then slowly add 2 mmol (0.5 g) of CuSO 4 ·5H 2 O, stirred for 2 hours; then slowly added 6 mmol (1.844 g) of reduced glutathione (GSH, C 10 h 17 N 3 o 6 S), stirred for another 30 minutes, put into a 50 ml stainless steel reaction kettle, sealed and put into a blast drying oven, heated to 200° C. for 10 hours, and naturally cooled to room temperature.

[0026] c. Filter, wash with deionized water and absolute ethanol three times respectively, and dry at 80° C. for 10 hours to obtain CuSGO.

[0027] d. Re-disperse in 40 ml of deionized water, stir for 30 minutes, add 10 mg of NaBH 4 , stirred for 10 minutes, hydrothermal reaction again, heated to 120 ° C for 4 hours, and naturally cooled to room temperature.

[0028] e. Filter, wash with deionized water and absolute ethanol three times respe...

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Abstract

The invention belongs to the field of manufacture of optoelectronic devices and in particular relates to an anode material with good cycle performance of a lithium ion battery and a preparation method of the anode material. The preparation method comprises the following steps: with glutathione as a sulfur source, adhering Cu<2+> to the surface of GO in a waterborne solvent, and then carrying out reaction on the Cu<2+> and -SH in the glutathione by virtue of a hydrothermal method to form CuS nano-particles which are distributed in the GO; and then carrying out reduction on the GO to form rGO by virtue of a second hydrothermal method, thus forming the nano CuS / reducing grapheme composite, CuS@rGO. The CuS@rGO is used as the anode material of the lithium ion battery and is very high in the first discharge capacity, the reversible capacity and the coulomb efficiency.

Description

technical field [0001] The invention belongs to the field of optoelectronic device preparation, in particular to a lithium ion battery anode material with good cycle performance and a preparation method thereof. Background technique [0002] Secondary cycle lithium-ion batteries are considered ideal energy storage devices for portable electronics. Electrode material through Li + The ability of intercalation and deintercalation to achieve energy storage and release determines the performance of lithium-ion batteries. At present, most researches on lithium-ion batteries focus on finding electrode materials with better cycle performance and discharge capacity. By deeply doping Li and improving Li + Both the transmission of electrons and electrons in the electrode can produce more than commercial graphite electrodes (372mA·h / g or 818mA·h / cm 3 , graphite density is 2.2g / cm 3 ) of the new high-capacity negative electrode. [0003] CuS has good electronic conductivity (10 -3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/587
CPCH01M4/362H01M4/5815H01M4/587H01M10/0525Y02E60/10
Inventor 任玉荣杨程丁建宁
Owner CHANGZHOU UNIV
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