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Structure and Electrochemical Performance of Al and Y Co-Doped α‑Nickel Hydroxide as a Cathode for a Ni-MH Battery

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  • معلومة اضافية
    • الموضوع:
      2021
    • Collection:
      Smithsonian Institution: Digital Repository
    • نبذة مختصرة :
      The Al and Y elements co-doped α-Ni­(OH) 2 materials were prepared by a chemical complexing precipitation method. The physical properties and structures of these materials were characterized, and their electrochemical performance as a cathode for Ni-MH batteries was measured. The results show that Al and Y elements partially replaced Ni atoms in the layers and attracted more anions between interlayers, thereby neutralizing the positive charge and stabilizing the structure. Therefore, the Al and Y elements co-doped α-Ni­(OH) 2 cathode displays excellent reaction reversibility, low electrochemical resistance, and fast diffusion rate. Besides, the cycling stability indicates that the discharge capacity and the activation rate are improved by adding Y element. The sample containing 2 atom % Y has the highest capacity of 388 mAh g –1 at 1 C rate, and it has great rate performance and great cycle stability. This is a promising material as a cathode applied in Ni-MH batteries.
    • Relation:
      https://figshare.com/articles/journal_contribution/Structure_and_Electrochemical_Performance_of_Al_and_Y_Co-Doped_Nickel_Hydroxide_as_a_Cathode_for_a_Ni-MH_Battery/17019144
    • الرقم المعرف:
      10.1021/acs.energyfuels.1c03256.s001
    • Rights:
      CC BY-NC 4.0
    • الرقم المعرف:
      edsbas.4B1CB1D8