Efficient preparation of highly hydrogenated graphene and its application as a high-performance anode material for lithium ion batteries

A novel method has been developed to prepare hydrogenated graphene (HG) via a direct synchronized reduction and hydrogenation of graphene oxide (GO) in an aqueous suspension under 60 Co gamma ray irradiation at room temperature. GO can be reduced by the aqueous electrons (e aq ) while the hydrogenation takes place due to the hydrogen radicals formed in situ under irradiation. The maximum hydrogen content of the as-prepared highly hydrogenated graphene (HHG) is found to be 5.27 wt% with H/C = 0.76. The yield of the target product is on the gram scale. The as-prepared HHG also shows high performance as an anode material for lithium ion batteries. Highly hydrogenated graphene (HHG) was prepared by synchronal reduction and hydrogenation of graphene oxide (GO) for lithium ion batteries.