Electrochemical lithium intercalation into and de-intercalation out of B/C materials used as Li-ion battery anodes

抄録

Boron/carbon (B/C) materials with a graphite-like layer structure were prepared and characterized and used as anodes in lithium (Li) ion batteries (LIBs). Li was electrochemically intercalated into and de-intercalated from these materials. The B/C material with the composition BC_7.9 showed the highest reversible capacity (about 580 mA h/g) among the materials prepared. Ex-situ x-ray diffraction indicated that the intercalation of Li into the layers of the B/C materials occurred during discharge to form a first-stage intercalation compound. ⁷Li and ¹¹B-NMR observations suggested that the intercalated Li interacted with B in the materials which resulted in large capacities of the B/C materials as LIB anodes.