Graphite-anchored lithium vanadium oxide as anode of lithium ion battery

Abstract

Yi, J. et al. (2013). Graphite-anchored lithium vanadium oxide as anode of lithium ion battery. Abstract Graphite-anchored lithium vanadium oxide (Li1.1 V0.9 O2 ) has been synthesized via a "one-pot" in situ method. The effects of the synthesis conditions, such as the ratio of reaction components and calcination temperature, on the electrochemical performance are systematically investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), galvanostatic discharge/charge tests and differential scanning calorimetry (DSC). Compared with the simple mixture of graphite and lithium vanadium oxide, the graphite-anchored lithium vanadium oxide delivers an enhanced reversible capacity, rate capability and cyclic stability. It also shows better thermal stability.

Li1.1V0.9O2/C Microspheres with Isomeric Core‐Shell structure and their Improved Lithium Storage Performance for Lithium‐Ion Batteries

“…After 500 cycles at a rate of 2 C, the capacity of bare Li 1.1 V 0.9 O 2 and Li 1.1 V 0.9 O 2 /C microspheres is respectively 80 % and 95 % of the initial ones (Figure d). Compared with the previously reported literature (Figure e),,,, Li 1.1 V 0.9 O 2 /C microspheres exhibit a slight low capacity at 0.2 C rate, while reveal much higher capacity at other high rates.…”

Lithium-ion diffusion mechanisms in the battery anode material Li1+xV1−xO2

“…Recent studies have shown that Li can be intercalated into the layered oxide Li 1+x V 1Àx O 2 , at an unusually low voltage of B0.1 V vs. Li + /Li, [13][14][15][16][17][18][19][20] with a theoretical volumetric capacity of 1360 mA h cm À3 compared to graphite at 790 mA h cm À3 . Previously we investigated the intercalation process for Li 1+x V 1Àx O 2 and in particular the key role that non-stoichiometry or excess lithium (x 4 0) plays in switching on intercalation.…”

Synthesis and electrochemical performance of 0.6Li3V2(PO4)3·0.4Li–V–O composite cathode material for lithium ion batteries

“…Li-V-O layered compounds consist of LiVO 2 , LiVO 3 , LiV 2 O 5 , V 2 O 5 and derivatives of V 2 O 5 [38][39][40][41][42][43][44][45][46]. For a layered structure, the extraction of Li + ion and the migration of vanadium ions makes Li-V-O compound unstable, and easy to lose the diffusion path of lithium ions [47,48], which makes this compound suffer from severe capacitance loss during charging/discharging cycling.…”