Zn3V2O8 porous morphology derived through a facile and green approach as an excellent anode for high-energy lithium ion batteries

- Zn3V2O8 porous sheets morphology are synthesized by facile and green method.
- It shows excellent structure and electrochemical stability for lithium ion batteries.
- It delivers specific capacity of 1128 mA h g−1 after 200 cycles at 0.3 A g−1.
- It shows high capacity of 370 mAh g−1 over 2000 cycles at 5 A g−1.

Zn3V2O8 (ZVO) with sheet-like morphology is synthesized by a simple green precipitation technique via a metal-organic framework (MOF) intermediate for use as an anode in high energy lithium-ion batteries (LIBs). This sheet-like morphology, enriched with highly porous features, is evident from transmission electron microscopy (TEM) and surface area measurements. When tested as a lithium half-cell electrode, the ZVO porous sheets delivered a reversible specific capacity of 1228 mA h g−1 at a current density of 0.3 A g−1 for 200 cycles. Interestingly, on applying two different high current densities of 1 and 3 A g−1, this porous ZVO material registered high capacities of 665 and 510 mA h g−1, initially for 30 and 50 cycles, respectively. On reducing the current density to 0.5 and 1 A g−1 for the two instances, both sustained stable capacities of 906 and 687 mA h g−1 in the 160th and 600th cycles, respectively. The fact that these porous sheets maintained a stable capacity as high as 370 mA h g−1 at the high applied current density of 5 A g−1 after 2000 discharge/charge cycles reveals the structural stability of the ZVO prepared by a simple green precipitation technique.

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