title: Novel Rechargeable M3V2(PO4)3//Zinc (M = Li, Na) Hybrid Aqueous Batteries with Excellent Cycling Performance.
abstract: A rechargeable hybrid aqueous battery (ReHAB) containing NASICON-type M3V2(PO4)3 (M = Li, Na) as the cathodes and Zinc metal as the anode, working in Li2SO4-ZnSO4 aqueous electrolyte, has been studied. Both of Li3V2(PO4)3 and Na3V2(PO4)3 cathodes can be reversibly charge/discharge with the initial discharge capacity of 128 mAh g(-1) and 96 mAh g(-1) at 0.2C, respectively, with high up to 84% of capacity retention ratio after 200 cycles. The electrochemical assisted ex-XRD confirm that Li3V2(PO4)3 and Na3V2(PO4)3 are relative stable in aqueous electrolyte, and Na3V2(PO4)3 showed more complicated electrochemical mechanism due to the co-insertion of Li(+) and Na(+). The effect of pH of aqueous electrolyte and the dendrite of Zn on the cycling performance of as designed MVP/Zn ReHABs were investigated, and weak acidic aqueous electrolyte with pH around 4.0-4.5 was optimized. The float current test confirmed that the designed batteries are stable in aqueous electrolytes. The MVP//Zn ReHABs could be a potential candidate for future rechargeable aqueous battery due to their high safety, fast dynamic speed and adaptable electrochemical window. Moreover, this hybrid battery broadens the scope of battery material research from single-ion-involving to double-ions -involving rechargeable batteries.
authors.affiliation: College of Science, Shanghai University, Shanghai 200444, China.|Department of Chemical Engineering, University of Waterloo, Waterloo N2L 5G5, Canada.
authors.forename: H B
authors.initials: HB
authors.lastname: Zhao
authors.affiliation: College of Science, Shanghai University, Shanghai 200444, China.
authors.forename: C J
authors.initials: CJ
authors.lastname: Hu
authors.affiliation: School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
authors.forename: H W
authors.initials: HW
authors.lastname: Cheng
authors.affiliation: College of Science, Shanghai University, Shanghai 200444, China.
authors.forename: J H
authors.initials: JH
authors.lastname: Fang
authors.affiliation: College of Science, Shanghai University, Shanghai 200444, China.
authors.forename: Y P
authors.initials: YP
authors.lastname: Xie
authors.affiliation: College of Science, Shanghai University, Shanghai 200444, China.
authors.forename: W Y
authors.initials: WY
authors.lastname: Fang
authors.affiliation: Department of Chemical Engineering, University of Waterloo, Waterloo N2L 5G5, Canada.
authors.forename: T N L
authors.initials: TN
authors.lastname: Doan
authors.affiliation: Department of Chemical Engineering, University of Waterloo, Waterloo N2L 5G5, Canada.
authors.forename: T K A
authors.initials: TK
authors.lastname: Hoang
authors.affiliation: College of Science, Shanghai University, Shanghai 200444, China.|State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
authors.forename: J Q
authors.initials: JQ
authors.lastname: Xu
authors.affiliation: Department of Chemical Engineering, University of Waterloo, Waterloo N2L 5G5, Canada.
authors.forename: P
authors.initials: P
authors.lastname: Chen