Graphene oxides doped MIL-101(Cr) as anode materials for enhanced electrochemistry performance of lithium ion battery Inorganic Chemistry Communications, Available online 31 December 2015, Pages Gaihua Li, Fengcai Li, Hao Yang, Fangyi Cheng, Na Xu, Wei Shi, Peng Cheng
Graphical abstractMIL-101(Cr)/graphene oxide composites have been successfully synthesized via a facile route using a solvothermal treatment. The morphology of GO reveals typical fold lamellar structure and MIL-101(Cr) is octahedral crystal morphology distributed uniformly with size about 1μm. The graphene oxide dispersed uniformly over MIL-101(Cr). The rate performance confirmed the enhancement of GO doping on electrochemical performance.
| The hydrogen storage properties of the Ti decorated benzene-Ti-graphene sandwich-type structures Original Research Article International Journal of Hydrogen Energy, Available online 30 December 2015, Pages Chunmei Tang, Yimin Wan, Xue Zhang, Jing Kang, Jianfei Zou, Jie Cao
Graphical abstractThe binding energy(Eb) for the Ti atom to (6x6) armchair graphitic sheet and (4x7) zigzag graphitic sheet are a little smaller than the experimental cohesive energy of bulk Ti(4.85 eV/atom). Therefore, when more Ti atoms are adsorbed on the structure, the clustering of Ti atoms perhaps appear, which will hander the further hydrogen storage. However, the Eb for the Ti atom to the zigzag and armchair substrate in the two sandwich-type structures increase to 8.27 eV and 8.62 eV respectively, not only are much higher than the Eb of Ti-graphene structure, but also are nearly double of the experimental cohesive energy of bulk Ti(4.85 eV/atom). Therefore, the problem of metal aggregative to form the cluster is expected to be overcome in these two sandwich-type structures, and the materials will be stable for hydrogen storage. Moreover, The desorption temperature TD for two hydrogen molecules adsorbed benzene-Ti-graphene(BTG) structures are at the room temperature, suggesting that the hydrogen release at near-ambient temperature may be feasible.
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