Grapheme/WS2 nanocomposite electrode of lithium ion battery and manufacturing method thereof

一种锂离子电池石墨烯/WS<sub>2</sub>复合纳米材料电极及制备方法

Abstract

The invention discloses a grapheme/WS2 nanocomposite electrode of a lithium ion battery and a manufacturing method thereof. The electrode comprise 75-85% of nanocomposite active materials consisting of grapheme nano-sheets and WS2, 5-10% of acetylene black and 10% of polyvinylidene fluoride in percentage by mass, wherein the amount-of-material rate of the grapheme nano-sheets to the WS2 nano materials in the nanocomposite active materials is (1:1)-(4:1). The manufacturing method of the electrode comprises the following steps: using a chemical oxidation method to manufacture graphite oxide nano-sheets by taking graphite as a raw material; under the existence of the graphite oxide nano-sheets, synthesizing by using a hydrothermal in-situ reduction method so as to obtain the grapheme nano-sheets/WS2 nanocomposite; and manufacturing the electrode by taking the grapheme nano-sheets/WS2 nanocomposite as the active material. The electrode has the advantages of high electrochemical lithium storage reversible capacity and stable circulation property, and can be widely applied to next-generation lithium ion batteries.
本发明公开了一种锂离子电池石墨烯/WS2复合纳米材料电极及制备方法,电极的活性物质为石墨烯纳米片与WS2的复合纳米材料,其余为乙炔黑和聚偏氟乙烯,各组分的质量百分比含量为:复合纳米材料活性物质75-85%,乙炔黑5-10%,聚偏氟乙烯10%,其中,复合纳米材料活性物质中石墨烯纳米片与WS2纳米材料的物质量之比为1∶1~4∶1。本发明的电极制备方法包括:用化学氧化法以石墨为原料制备氧化石墨纳米片、在氧化石墨纳米片存在下一步水热原位还原法合成得到石墨烯纳米片/WS2复合纳米材料、最后以石墨烯纳米片/WS2复合纳米材料为活性物质制备电极。本发明的电极不仅具有高的电化学贮锂可逆容量,而且具有优异的循环稳定性能,在新一代的锂离子电池中具有广泛的应用。

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NO-Patent Citations (1)

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