Electrochim Acta 2013, 107:555–561.CrossRef 22. Lian P, Zhu X, Liang S, Li Z, Yang W, Wang H: Large reversible capacity of high quality selleck inhibitor graphene sheets as an anode material for lithium-ion batteries. Electrochim Acta buy GSK690693 2010, 55:3909–3914. 10.1016/j.electacta.2010.02.025CrossRef 23. Guo P, Song H, Chen X: Hollow graphene oxide spheres self-assembled by W/O emulsion. J Mater Chem 2010, 20:4867–4874. 10.1039/b927302fCrossRef 24. Xing W, Bai P, Li ZF, Yu RJ, Yan ZF, Lu GQ, Lu LM: Synthesis of ordered nanoporous carbon and its application in Li-ion battery. Electrochim

Acta 2006, 51:4626–4633. 10.1016/j.electacta.2006.01.008CrossRef 25. Wu Y, Jiang C, Wan C, Tsuchida

E: Effects of catalytic oxidation on the electrochemical performance of common PF-6463922 natural graphite as an anode material for lithium ion batteries. Electrochem Commun 2000, 2:272–275. 10.1016/S1388-2481(00)00022-9CrossRef 26. Dahn JR, Zheng T, Liu Y, Xue JS: Mechanisms for lithium insertion in carbonaceous materials. Science 1995, 270:590–593. 10.1126/science.270.5236.590CrossRef 27. Liu T, Luo R, Yoon SH, Mochida I: Effect of vacuum carbonization treatment on the irreversible capacity of hard carbon prepared from biomass material. Mater Lett 2010, 64:74–76. 10.1016/j.matlet.2009.10.011CrossRef 28. Chang YC, Sohn HJ, Korai Y, Mochida I: Anodic performances of coke from coals. Carbon 1998, 36:1653–1662. 10.1016/S0008-6223(98)00160-2CrossRef 29. Zhou J, Song H, Fu B, Wu B, Chen X: Synthesis and high-rate capability of quadrangular carbon nanotubes with one open end as anode materials for lithium-ion batteries. J Mater Chem 2010, 20:2794–2800. 10.1039/b926576gCrossRef

Competing interests The authors declare that they have no competing interests. Authors’ contributions RRY designed parts of the experiments and sample preparations and drafted the manuscript. DLZ is the corresponding author and provided a great help for experimental designs. LZB, NNY, and LX took part in sample preparation and characterizations and discussed the results. All authors have read and approved the final manuscript.”
“Background Graphene has attracted global research interests across IMP dehydrogenase a wide range of applications [1, 2]. However, graphene is highly sensitive to extraneous environmental influences. Thus, it was deemed worthwhile to deposit protective layers over graphene without impairing its properties. Hexagonal boron nitride (h-BN), a well-known dielectric material, may afford the necessary protection for graphene [3, 4]. As an analogue of graphene, h-BN shows a minimal lattice mismatch with graphene of about 1.7%, yet has a wide band gap [5–8] and lower environmental sensitivity [3, 4].