TY - JOUR
T1 - Hollow-porous nanospheres of ZnMn2O4 spinel
T2 - A high energy density cathode for rechargeable aqueous battery
AU - Pramanik, Atin
AU - Chattopadhyay, Shreyasi
AU - Maiti, Sandipan
AU - De, Goutam
AU - Mahanty, Sourindra
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/4/15
Y1 - 2021/4/15
N2 - Well-controlled hollow-porous nanostructures can provide enhanced charge storage capacity owing to the rapid diffusion of electrolyte ions into their interior. However, interface engineering of stable hollow-porous nanostructures with reversible faradaic reactions for efficient energy conversion/storage devices is still a challenge. Herein, we report solvothermal synthesis of spinel ZnMn2O4 with a hollow-porous spherical (ZMOHS) morphology. The formation mechanism of such a hierarchical nanostructure has been discussed. The ZMOHS exhibits a specific capacity of ~187 mAh g−1 at a current density of 2 A g−1 when tested as a faradaic electrode (vs Pt) for a rechargeable aqueous battery (RAB) in alkaline electrolyte. Furthermore, a full cell RAB constituting of ZMOHS//activated carbon (AC) demonstrates energy and power densities of ~215.7 Wh Kg−1 and ~1184.5 W kg−1 respectively, with ultra-long cycling stability (~106% capacitance retention after 10,000 cycles), making it a very promising material for next-generation energy storage device applications.
AB - Well-controlled hollow-porous nanostructures can provide enhanced charge storage capacity owing to the rapid diffusion of electrolyte ions into their interior. However, interface engineering of stable hollow-porous nanostructures with reversible faradaic reactions for efficient energy conversion/storage devices is still a challenge. Herein, we report solvothermal synthesis of spinel ZnMn2O4 with a hollow-porous spherical (ZMOHS) morphology. The formation mechanism of such a hierarchical nanostructure has been discussed. The ZMOHS exhibits a specific capacity of ~187 mAh g−1 at a current density of 2 A g−1 when tested as a faradaic electrode (vs Pt) for a rechargeable aqueous battery (RAB) in alkaline electrolyte. Furthermore, a full cell RAB constituting of ZMOHS//activated carbon (AC) demonstrates energy and power densities of ~215.7 Wh Kg−1 and ~1184.5 W kg−1 respectively, with ultra-long cycling stability (~106% capacitance retention after 10,000 cycles), making it a very promising material for next-generation energy storage device applications.
KW - Aqueous rechargeable battery
KW - Electrochemical energy storage
KW - Hydrothermal synthesis
KW - Ternary metal oxide
KW - ZnMnO hollow sphere
UR - http://www.scopus.com/inward/record.url?scp=85101314371&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2021.124373
DO - 10.1016/j.matchemphys.2021.124373
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AN - SCOPUS:85101314371
SN - 0254-0584
VL - 263
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 124373
ER -