Monolayer MoS2 nanosheets (NSs) are promising anode materials for lithium-ion batteries because all redox reactions take place at the surface without lithium-ion diffusion limit. However, the expanded band gap of monolayer MoS2 NSs (∼1.8 eV) compared to their bulk counterparts (∼1.2 eV) and restacking tendency due to the van der Waals forces result in poor electron transfer and loss of the structure advantage. Here, a facile approach is developed to fabricate the MoS2-graphene aerogels comprising controlled three-dimensional (3D) porous architectures constructed by interconnected monolayer MoS2-graphene hybrid NSs. The robust 3D architectures combining with the monolayer feature of the hybrid NSs not only prevent the MoS2 and graphene NSs from restacking, but also enable fast electrode kinetics due to the surface reaction mechanism and highly conductive graphene matrix. As a consequence, the 3D porous monolayer MoS2-graphene composite aerogels exhibit a large reversible capacity up to 1200 mAh g(-1) as well as outstanding cycling stability and rate performance, making them promising as advanced anode materials for lithium-ion batteries.

No abstract

No abstract

No abstract

Batteries. -Nanocrystalline LiMn2O4/graphene nanosheet (GNS) composite is hydrothermally prepared by dispersing GNS in H2O followed by addition of KMnO4 and LiOH (autoclave, 180°C, 5 h). LiMn2O4 nanoparticles of 10-30 nm are well crystallized and homogeneously anchored on the GNS which provides a highly conductive matrix and also effectively reduces the agglomeration of LiMn2O4 nanoparticles. Specific capacity, cycle performance, and rate capability measurements reveal the superior electrochemical performance of the nanocomposite and makes it a promising cathode material for high-performance Li ion batteries. -(LIN, B.; YIN, Q.; HU, H.; LU, F.; XIA*, H.; J. Solid State Chem. 209 (2014) 23-28, http://dx.