对于从属权利要求3，对比文件 1还公开了如下技术特征：通过各种方式用所

With respect to dependent claim 3, Reference 1 also discloses the technical feature of impregnating the foam with the required amount of the required lithium-attracting metal by various means, or alternatively, metal-containing precursors can be incorporated into the graphite prior to pyrolysis olefin-polymer compacts or composite structures. It can be seen that the additional technical features of dependent claim 3 have been disclosed in reference document 1.

For dependent claim 3, the reference document 1 also discloses the following technical features: impregnate the foam with the required amount of lithium absorbing metal in various ways, or incorporate the metal containing precursor into the graphene polymer compacts or composite structures before pyrolysis. It can be seen that the additional technical features of dependent claim 3 have been disclosed by reference document 1.

For dependent claim 3, Reference Document 1 also discloses the following technical features: the foam is impregnated with the required amount of metal that attracts lithium in various ways, or the metal-containing precursor can be incorporated into the graphene-polymer compact or composite structure before pyrolysis. It can be seen that the additional technical features of Dependent Claim 3 have been disclosed in Reference Document 1.