Hybrid CuO-Co

3

O

4

nanosphere building blocks have been embedded between the layered nanosheets of reduced graphene oxides with a three dimensional (3D) hybrid architecture (CuO-Co

3

O

4

-RGO)

which are successfully applied as enhanced anodes for lithium-ion batteries (LIBs). The CuO-Co

3

O

4

-RGO sandwiched nanostructures exhibit a reversible capacity of~847 mA·h·g

-1

after 200 cycles' cycling at 100 mA·g

-1

with a capacity retention of 79%. The CuO-Co

3

O

4

-RGO compounds show superior electrochemical properties than the comparative CuO-Co

3

O

4

Co

3

O

4

and CuO anodes

which may be ascribed to the following reasons:the hybridizing multicomponent can probably give the complementary advantages; the mutual benefit of uniformly distributing nanospheres across the layered RGO nanosheets can avoid the agglomeration of both the RGO nanosheets and the CuO-Co

3

O

4

nanospheres; the 3D storage structure as well as the graphene wrapped composite could enhance the electrical conductivity and reduce volume expansion effect associated with the discharge-charg

e process.