Achieving Ah-Level Zn-MnO_(2)Pouch Cells via Interfacial Solvation Structure EngineeringOA
Aqueous zinc-ion batteries(AZIBs)offer a safe,cost-effective,and high-capacity energy storage solution,yet their performance is hindered by interfacial challenges at the Zn anode,including hydrogen evolution,corrosion,and dendritic Zn growth.While most studies focus on regulating Zn~(2+)solvation structures in bulk electrolytes,the evolution of interfacial solvation—where Zn~(2+)undergoes desolvation and deposition—remains insufficiently explored.Here,we introduce sulfated nanocellulose(SNC),an anion-rich biopolymer,to tailor the interfacial solvation structure without altering the bulk electrolyte composition.Using in situ attenuated total reflection Fourier transform infrared spectroscopy and fluorescence interface-extended X-ray absorption fine structure,we reveal that SNC facilitates the formation of a low-coordinated Zn~(2+)solvation shell at the interface by weakening H_(2)O coordination.This transformation is driven by electrostatic interactions between Zn~(2+)and anchored sulfate groups,thereby reducing water activity,improving interfacial stability during charge/discharge,and suppressing parasitic reactions.Consequently,a high average coulombic efficiency of 99.6%over 500 cycles in ZnTi asymmetric cells and 1.5 Ah pouch cells(13.4 mg cm^(-2)loading,remained stable over 250 cycles)were achieved in SNC-induced AZIBs.This work underscores the importance of interfacial solvation structure engineering—beyond traditional bulk electrolyte design—in enabling practical,high-performance AZIBs.
Jing Wei;Lichao Tan;Qianyi Ma;Xintao Long;Shibin Li;Yu Shi;Rui Gao;Zijing Xu;Dan Luo;Jie Zhang;Dagang Li;Xin Wang;Aiping Yu;Zhongwei Chen
Institute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,People’s Republic of China Department of Chemical Engineering,Waterloo Institute for Nanotechnology,University of Waterloo,Waterloo N2L 3G1,Canada College of Material Science and Engineering,Nanjing Forestry University,Nanjing 210037,People’s Republic of ChinaInstitute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,People’s Republic of ChinaInstitute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,People’s Republic of China Department of Chemical Engineering,Waterloo Institute for Nanotechnology,University of Waterloo,Waterloo N2L 3G1,CanadaPower Battery and Systems Research Center,State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,People’s Republic of ChinaInstitute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,People’s Republic of ChinaDepartment of Chemical Engineering,Waterloo Institute for Nanotechnology,University of Waterloo,Waterloo N2L 3G1,CanadaDepartment of Chemical Engineering,Waterloo Institute for Nanotechnology,University of Waterloo,Waterloo N2L 3G1,CanadaDepartment of Chemical Engineering,Waterloo Institute for Nanotechnology,University of Waterloo,Waterloo N2L 3G1,CanadaPower Battery and Systems Research Center,State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,People’s Republic of ChinaPower Battery and Systems Research Center,State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,People’s Republic of ChinaCollege of Material Science and Engineering,Nanjing Forestry University,Nanjing 210037,People’s Republic of ChinaInstitute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,People’s Republic of ChinaDepartment of Chemical Engineering,Waterloo Institute for Nanotechnology,University of Waterloo,Waterloo N2L 3G1,CanadaPower Battery and Systems Research Center,State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,People’s Republic of China
信息技术与安全科学
Aqueous zinc-ion batteriesIn situ spectroscopyInterfacial solvation structureNanocellulose
《Nano-Micro Letters》 2026 (4)
P.526-539,14
the National Natural Science Foundation of China(No.22379047)Yinzhou R&D Team(X.W.)Guangdong Basic and Applied Basic Research Foundation(2022B1515120019)the Project Funded by the China Scholarship Council(No.202108320278)the support from the Vacuum Interconnected Nanotech Workstation(Nano-X)from Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences(SINANO)。
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