The performance of graphene, and a few selected derivatives, was investigated as a negative electrode material in sodium and lithium-ion batteries. Hydrogenated graphene shows significant improvement in battery performance compared with as-prepared graphene, with reversible capacities of 488 mAh/g for lithium-ion batteries after 50 cycles and 491 mAh/g for sodium-ion batteries after 20 cycles. Notably, high rates of 1 A/g for graphene and 5 A/g for hydrogenated graphene indicate higher capacities in sodium-ion batteries than in lithium-ion batteries. Alternatively, nickel-nanoparticle decorated graphene performed relatively poorly in lithium-ion batteries. However, in sodium-ion batteries they showed the highest reversible capacities of all studied batteries and graphene derivatives, with 826 mAh/g after 25 cycles with 97% coulombic efficiency. Overall, minor modifications to graphene can dramatically improve electrochemical performance in both lithium-ion and sodium-ion batteries (ChemElectroChem. 2015).
- Pressure tuning of light-induced superconductivity in K3C60
- Electrochemical intercalation of fullerene and hydrofullerene with sodium
- Effect of Ni-nanoparticles decoration on graphene to enable high capacity sodium-ion battery negative electrodes
- Single-Walled Carbon Nanotube Reactor for Redox Transformation of Mercury Dichloride
- Mott Transition in the A15 Phase of Cs3C60: Absence of a Pseudogap and Charge Order