Binder-free fabricated transparent Nb 4+ implanted Nb 2 O 5-x ultra-thin negatrode with enhanced areal capacitance and exceptional cyclic stability in aqueous electrolyte
Solid State Sciences, ISSN: 1293-2558, Vol: 140, Page: 107204
2023
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Article Description
Direct coating and surface engineering of Nb 2 O 5 -based active storage materials are important techniques for improving their interfacial interactions with the current collector and electrolyte ions, which have been difficult to achieve in a facile and energy-efficient way. Herein, we report the binder-free coating of shear-structured Nb 4+ implanted Nb 2 O 5 (Nb 2 O 5-x ) sub-micron thin pseudocapacitive negatrode with wide negative operating voltage (−1.20 V vs Ag/AgCl), improved electronic and ionic conductivity, reduced charge transfer resistance and enhanced energy storage capacity. The Nb 4+ implanted electrode exhibits 3.5 mF/cm 2 c. a. At 5 mV/s and 100% capacity retention after 3000 constant charge-discharge cycles. The unique electrode was realized via mild de-oxidation of electrodeposited Nb 2 O 5 in a vacuum-less, low-temperature surface engineering process. This simple strategy is suitable for improving current collector-Nb 2 O 5-x -electrolyte interfacial interactions and for industrial-scale production of improved pseudocapacitive negatrodes.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1293255823000961; http://dx.doi.org/10.1016/j.solidstatesciences.2023.107204; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85158019839&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1293255823000961; https://dx.doi.org/10.1016/j.solidstatesciences.2023.107204
Elsevier BV
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