摘要
Tin(Sn)is considered an effective anode material for stripping and plating due to its promising capacity,isotropic deposition,and relatively negative redox potential of-0.91 V vs.standard hydrogen electrode(SHE).However,the challenges of hydrogen evolution corrosion and“dead Sn”formation at the Snalkaline electrolyte interface restrict its reversibility,which poses challenges for flexible devices and in a broad temperature range.In this study,we successfully designed a corrosion-resistant Sn anode(CuPVDF@Sn)featuring a multilevel microchannel structure.The Sn-affinitive Cu mesh with good electronic conductivity lowers the nucleation energy barrier and enhances deposition uniformity,while PVDF improves hydrogen evolution potential.Additionally,the soft Cu mesh and PVDF provide flexibility in design.As a result,the flexible Cu-PVDF@Sn anode achieves a coulombic efficiency(CE)of 92.61% and stable cycling for over 800 h.The flexible Sn-air battery based on this anode exhibits an energy density of 504 Wh kg^(-1),a peak power density of 80 mW cm^(-2),and a cycling stability of 120 h at 5 mA cm^(-2).It also operates effectively within a wide temperature range of -15-60℃,providing strong support for excellent environmental adaptability.The proposed concept in this work might provide a promising alternative for developing stable Sn anodes in flexible Sn-air batteries.
基金
funded by the National Nature Science Foundation of China(62264006)
the Special Basic Cooperative Research Programs of Yunnan Provincial Undergraduate Universities’Association(202101BA070001-034)
the“Thousand Talents Program”of Yunnan Province for Young Talents,XingDian Talent Support Program for Young Talents
Frontier Research Team of Kunming University 2023。
