Journal
MATERIALS HORIZONS
Volume 4, Issue 6, Pages 1122-1127Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7mh00512a
Keywords
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Funding
- National Natural Science Foundation of China [51522101, 51471075, 51631004, 51401084]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110061120040]
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A novel electrode material, P3-type K0.33Co0.53Mn0.47O2.0.39H(2)O (KCM), is synthesized through an easily-operated sol-gel method and it delivers considerable Na ion storage abilities when employed as both a cathode and an anode in NIBs. As a cathode, the compound displays remarkable average voltage potentials (over 3 V) and a high discharge capacity (114 mA h g(-1) at 100 mA g(-1)). As an anode, a safe and ideal average voltage potential (0.53 V), a high discharge capacity (174 mA h g(-1)), and a long cycle life (950 cycles at 500mA g(-1)) are also delivered together. In addition, a KCM-based full cell is subsequently built and even without any optimization it can still exhibit a high energy density (91 W h kg(-1)) accompanied by a long cycle performance (100 cycles at 100 mA g(-1)).
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