Abstract
Rechargeable Ni–Zn battery with aqueous alkaline electrolyte represents a low-cost, safe and environmentally benign battery technology but limited in energy density and inferior cycling stability. Herein, Zn doped NiMn-layered double hydroxides have been proposed to enhance the specific capacity and cycle stability of Ni–Zn battery, which featuring lower Ni valence state and flower-like micro-structure. As a result, NiMn-LDH with 5 at% Zinc doping in can achieve a high mass-specific capacity of 294 mAh g−1 at 1 A g−1 and enhanced stability, manifesting one of the best cathode materials for Ni–Zn batteries. Moreover, the corresponding Ni–Zn battery behaves a high capacity of 180 mAh g−1 at 1 A g−1 and 100% retention after 1000 cycles. This work demonstrates the superiority of materials design in both elemental composition and hierarchical structure to achieve high performance in energy storage, which can be also adapted to other battery systems.
Funder
Beijing University of Chemical Technology
National Natural Science Foundation of China and Ministry of Foreign Affairs and International Cooperation, Italy
the National Key Research and Development Project
the Royal Society and the Newton Fund through the Newton Advanced Fellowship award
the Program for Changjiang Scholars and Innovation Research Team in the University
the Fundamental Research Funds for the Central Universities, and the long-term subsidy mechanism from the Ministry of Finance and the Ministry of Education of PRC
National Natural Science Foundation of China
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials