title: Synthesis of novel ZnV₂O₄ hierarchical nanospheres and their applications as electrochemical supercapacitor and hydrogen storage material.
abstract: Hierarchical nanostructures (Hs) have recently garnered enormous attention due to their remarkable performances in catalysis, electronic devices, energy storage and conversion. Considering the advantage of hierarchical nanostructures, we have formulated a facile and template free method to synthesize novel hierarchical nanospheres (NHNs) of ZnV2O4. Both zinc and vanadium are earth abundant, relatively economical and can offer several oxidation states, which can render a broad range of redox reactions favorable for electrochemical energy storage applications. Keeping these points in mind, we investigated for the first time the electrochemical supercapacitor performance of NHNs. The electrochemical measurements were performed in 2 M KOH solution. The measured specific capacitance of ZnV2O4 electrode is 360 F/g at 1 A/g with good stability and retention capacity of 89% after 1000 cycles. Moreover, the hydrogen storage properties of NHNs were measured at 473, 573, and 623 K with an absorption of 1.76, 2.03, and 2.49 wt %. respectively. These studies pave the way to consider ZnV2O4 as prospective material for energy storage applications.
authors: Research Centre of Materials Science, Beijing Institute of Technology , Beijing 100081, People's Republic of China.
authors: Faheem K
authors: FK
authors: Butt
authors: Muhammad
authors: M
authors: Tahir
authors: Chuanbao
authors: C
authors: Cao
authors: Faryal
authors: F
authors: Idrees
authors: R
authors: R
authors: Ahmed
authors: Waheed S
authors: WS
authors: Khan
authors: Zulfiqar
authors: Z
authors: Ali
authors: Nasir
authors: N
authors: Mahmood
authors: M
authors: M
authors: Tanveer
authors: Asif
authors: A
authors: Mahmood
authors: Imran
authors: I
authors: Aslam