Abstract
Sodium-ion batteries (NIBs) are considered to be reasonable alternatives for lithium-ion batteries (LIBs). Currently, searching high performance anodes is a key challenge for rechargeable NIBs. Using the first-principle method, we have investigated properties of body-centered orthorhombic carbon structure (bco-C16) as anode materials for NIBs. 4 Na ions can be adsorbed stably in the structure at most as an electrode material of battery, and its maximum capacity is correspondingly 160.49 mAh/g. The diffusion energy barrier of Na in bco-C16 is small as 9 meV, mirroring an excellent mobility rate. Together with the small volume change and better conductivity as Na ions inserted, we suggest that bco-C16 has great potential to be an excellent all-carbon-based semimetal for NIBs anode material.
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